WO2023065886A1 - 唤醒方法、装置及电子设备 - Google Patents

唤醒方法、装置及电子设备 Download PDF

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Publication number
WO2023065886A1
WO2023065886A1 PCT/CN2022/118235 CN2022118235W WO2023065886A1 WO 2023065886 A1 WO2023065886 A1 WO 2023065886A1 CN 2022118235 W CN2022118235 W CN 2022118235W WO 2023065886 A1 WO2023065886 A1 WO 2023065886A1
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Prior art keywords
signal
wake
frequency point
comparator
correlation
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PCT/CN2022/118235
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English (en)
French (fr)
Inventor
孙晓宇
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Honor Device Co Ltd
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Honor Device Co Ltd
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Priority to US18/569,060 priority Critical patent/US20240155499A1/en
Priority to EP22882498.3A priority patent/EP4333530B1/en
Publication of WO2023065886A1 publication Critical patent/WO2023065886A1/zh
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • H04W52/0235—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal where the received signal is a power saving command
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is leader and terminal is follower
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is leader and terminal is follower using a pre-established activity schedule, e.g. traffic indication frame
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the field of terminal equipment, and in particular to a wake-up method, device and electronic equipment.
  • the sender To establish a connection between wireless electronic devices, the sender first needs to transmit a set of specific wake-up signals, and the wake-up device receives the wake-up signal and demodulates it correctly to achieve effective wake-up and start to establish a connection.
  • the traditional receiver architecture in wireless electronic equipment includes high-power devices such as low-noise amplifiers, mixers, and automatic gain controllers. If they are kept on during the waiting for wake-up phase, the standby power consumption of the receiver will be greatly increased.
  • the related technology reduces the standby power consumption of the receiver by reducing the duty cycle of the receiver, that is, the receiver periodically switches between the working state and the sleeping state. Although this solution of reducing the duty cycle can effectively reduce the standby power consumption of the receiver, it also reduces the probability of the receiver being woken up and increases the wake-up delay.
  • the present application provides a wake-up method, device and electronic equipment, which can monitor wake-up signals with extremely narrow bandwidths at multiple frequency points, increase the probability of successfully capturing wake-up signals, and reduce wake-up delays.
  • the present application provides a method for waking up.
  • the method includes: the first signal processing circuit monitors at a first frequency point; the second signal processing circuit monitors at a second frequency point; the second frequency point is different from the first frequency point; the second signal processing circuit monitors at a second frequency point; A wake-up signal is received at the second frequency point; the bandwidth of the wake-up signal is smaller than the first value; the wake-up signal is transmitted by the first electronic device at multiple transmission frequency points, or the wake-up signal is transmitted by the first electronic device at a frequency greater than the second transmitted over the bandwidth of the value; the second value is greater than the first value.
  • the first signal processing circuit monitors on the second frequency point; the second signal processing circuit monitors on the third frequency point; the third frequency point is connected with the first frequency point and the second frequency point are all different; at this time, the first signal processing circuit receives the wake-up signal at the second frequency point.
  • the probability of successfully capturing the wake-up signal is increased, thereby increasing the probability of the electronic device being successfully woken up, and reducing the wake-up time delay.
  • the wake-up signal can still be successfully captured when temperature drift occurs, effectively overcoming the influence of temperature drift.
  • the wake-up method may further include: the third signal processing circuit monitors on a third frequency point. After the temperature drift occurs, the third signal processing circuit monitors at the fourth frequency point. The fourth frequency point is different from the first frequency point, the second frequency point, and the third frequency point.
  • multiple signal processing circuits can be used to monitor multiple different frequency points. The more signal processing circuits there are, the greater the probability of successfully capturing the wake-up signal and the smaller the wake-up time delay.
  • the first signal processing circuit outputs a first logic value, which is used to indicate that the first signal processing circuit receives a wake-up signal.
  • the second signal processing circuit outputs a second logic value, and the second logic value is used to indicate that the second signal processing circuit has not received the wake-up signal.
  • the first logic OR operation circuit determines that the wake-up signal is received according to the first logic value and the second logic value. In this way, when any one of the first signal processing circuit and the second signal processing circuit receives the wake-up signal, it can be determined that the wake-up signal is received, which improves the receiving sensitivity.
  • each signal processing circuit When multiple signal processing circuits are used, if each signal processing circuit receives a wake-up signal, it can output a logic value of 1; The logic values of the outputs are added, and if a logic value of 1 is obtained, it is determined that a wake-up signal has been received. In this way, as long as at least one signal processing circuit receives the wake-up signal, it can be determined that the wake-up signal is received.
  • the first signal processing circuit includes a very narrowband bandpass filter, an envelope detector, a comparator and a correlator, the input end of the extremely narrowband bandpass filter is coupled to the antenna, and the input end of the envelope detector is connected to the The output end of the ultra-narrowband bandpass filter is coupled, the input end of the comparator is coupled with the output end of the envelope detector, and the input end of the correlator is coupled with the output end of the comparator.
  • the first signal processing circuit may include: an extremely narrowband bandpass filter performs extremely narrowband bandpass filtering on the first signal monitored at the second frequency point to obtain an extremely narrowband bandpass filter.
  • the filtered signal with wide bandwidth the envelope detector extracts the amplitude envelope of the filtered signal to obtain the baseband pulse signal; the comparator compares the voltage of the baseband pulse signal with the reference voltage to obtain the first digital signal sequence; the correlator obtains the first digital signal The first correlation index value of the sequence and the preset wake-up sequence, and compare the first correlation index value with the preset correlation threshold to obtain the correlation comparison result, when the correlation comparison result indicates the first correlation index Values greater than the correlation threshold, the first signal is a wake-up signal.
  • filtering on an extremely narrow bandwidth can filter out more noise and interference and improve anti-interference capability.
  • the comparator comprises a first comparator and a second comparator, the input terminals of the first comparator and the input terminals of the second comparator are respectively coupled to the output terminals of the envelope detector;
  • the correlator comprises a first correlator and a second correlator, the input of the first correlator is coupled to the output of the first comparator, and the input of the second correlator is coupled to the output of the second comparator;
  • the first signal processing circuit also includes a second Logic OR operation circuit, the output end of the first correlator and the output end of the second correlator are respectively coupled with the input end of the second logic OR operation circuit.
  • the comparator compares the voltage of the baseband pulse signal with the reference voltage to obtain the first digital signal sequence, including: the first comparator compares the voltage of the baseband pulse signal with the first reference voltage to obtain the first candidate digital signal sequence; the second comparator compares the voltage of the baseband pulse signal with the second reference voltage to obtain a second candidate digital signal sequence; the second reference voltage is different from the first reference voltage.
  • the correlator obtains the first correlation index value of the first digital signal sequence and the preset wake-up sequence, and compares the first correlation index value with the preset correlation threshold to obtain the correlation comparison result.
  • the result of the comparison indicates that the first correlation index value is greater than the correlation threshold, and the first signal is a wake-up signal, including: the first correlator obtains the first correlation index value of the first candidate digital signal sequence and the preset wake-up sequence The first candidate value, and compare the first candidate value of the first correlation index value with the preset correlation threshold to obtain the first correlation comparison result; the second correlator obtains the second candidate digital signal sequence and the second candidate value of the first correlation index value of the preset wake-up sequence, and comparing the second candidate value of the first correlation index value with the preset correlation threshold value to obtain a second correlation comparison Result; the second logical or operation circuit performs a logical or operation on the first correlation comparison result and the second correlation comparison result to obtain the first logical or operation result; when the first logic or operation result indicates the value of the first correlation index value At least one of the first candidate value and the second candidate value of the first correlation index value is greater than a preset correlation threshold, and the first signal processing circuit receives a wake-up signal at
  • each signal processing circuit a plurality of comparators with different reference voltages are used to compare with the voltage of the baseband pulse signal, and different reference voltages correspond to different distances, so that when the distances between two wireless electronic devices are different, at least One comparator can output an accurate wake-up sequence, thereby successfully waking up the main transceiver in the electronic device and improving the sensitivity.
  • the comparators may be a group of comparators, and the number of comparators in the group may be greater than 2.
  • the reference voltage of each comparator in the group of comparators is adapted to the preset distance, and the reference voltages of different comparators are different. In this way, when the distance between the two wireless electronic devices is different, both have a comparator with a reference voltage corresponding to the distance, and can accurately obtain the wake-up sequence in the wake-up signal, thereby successfully waking up. It can be seen that using multiple comparators with different reference voltages can significantly improve sensitivity.
  • the first signal processing circuit includes an extremely narrowband bandpass filter, an envelope detector, a comparator including an integrating circuit, and a correlator, the input end of the extremely narrowband bandpass filter is coupled to the antenna, and the envelope detector
  • the input terminal of the correlator is coupled to the output terminal of the extremely narrow band pass filter
  • the input terminal of the comparator including the integrating circuit is coupled to the output terminal of the envelope detector
  • the input terminal of the correlator is coupled to the output terminal of the comparator including the integrating circuit coupling.
  • the first signal processing circuit receives the wake-up signal at the second frequency point, including: an extremely narrow-band band-pass filter performs extremely narrow-band band-pass filtering on the first signal monitored at the second frequency point to obtain an extremely narrow bandwidth The filtered signal; the envelope detector extracts the amplitude envelope of the filtered signal to obtain the baseband pulse signal; the comparator including the integrator circuit converts the baseband pulse signal into a single pulse signal, and compares the voltage of the single pulse signal with the reference voltage , to obtain the second digital signal sequence; the correlator obtains the second correlation index value of the second digital signal sequence and the preset wake-up sequence, and compares the second correlation index value with the preset correlation threshold value to obtain the correlation A correlation comparison result; when the correlation comparison result indicates that the second correlation index value is greater than a preset correlation threshold, the first signal is a wake-up signal.
  • the integration circuit can accumulate the voltage of the baseband pulse signal to form a corresponding single pulse signal, so that the accuracy of the digital signal sequence output by the comparator
  • the comparator comprising the integrating circuit comprises a third comparator and a fourth comparator, the third comparator and the fourth comparator both comprise an integrating circuit, the input terminal of the third comparator and the input terminal of the fourth comparator
  • the input terminals are respectively coupled with the output terminals of the envelope detector;
  • the correlator includes a third correlator and a fourth correlator, the input terminal of the third correlator is coupled with the output terminal of the third comparator, and the input terminal of the fourth correlator Coupled with the output of the fourth comparator;
  • the first signal processing circuit also includes a second logic or operation circuit, the output of the third correlator and the output of the fourth correlator are respectively connected to the input of the second logic or operation circuit coupling.
  • the comparator comprising the integrator circuit converts the baseband pulse signal into a single pulse signal, and compares the voltage of the single pulse signal with a reference voltage to obtain a second digital signal sequence, including: the third comparator converts the baseband pulse signal It is a single pulse signal, and the voltage of the single pulse signal is compared with the third reference voltage to obtain the third candidate digital signal sequence; the fourth comparator converts the baseband pulse signal into a single pulse signal, and the voltage of the single pulse signal is compared with the first The four reference voltages are compared to obtain a fourth candidate digital signal sequence; the fourth reference voltage is different from the third reference voltage.
  • the correlator obtains the second correlation index value of the second digital signal sequence and the preset wake-up sequence, and compares the second correlation index value with the preset correlation threshold value to obtain the correlation comparison result; when the correlation The result of the comparison indicates that the second correlation index value is greater than the preset correlation threshold, and the first signal is a wake-up signal, including: the third correlator acquires the second correlation between the third candidate digital signal sequence and the preset wake-up sequence The first alternative value of the index value, and compare the first alternative value of the second correlation index value with the preset correlation threshold to obtain the third correlation comparison result; the fourth correlator obtains the fourth alternative The digital signal sequence is compared with the second candidate value of the second correlation index value of the preset wake-up sequence, and the second candidate value of the second correlation index value is compared with the preset correlation threshold value to obtain the fourth Correlation comparison result; the second logic or operation circuit performs logical OR operation on the third correlation comparison result and the fourth correlation comparison result to obtain the second logic or operation result; when
  • each signal processing circuit a plurality of comparators with different reference voltages are used to compare with the voltage of the baseband pulse signal, and different reference voltages correspond to different distances, so that when the distances between two wireless electronic devices are different, at least One comparator can output an accurate wake-up sequence, thereby successfully waking up the main transceiver in the electronic device and improving the sensitivity.
  • the first frequency point and the second frequency point are adjacent frequency points. In this way, when the temperature drift occurs and the temperature drift is small, the probability that the signal processing circuit receives a wake-up signal at an adjacent frequency point is increased, thereby increasing the probability of successful wake-up.
  • the first frequency point and the second frequency point are non-adjacent frequency points. In this way, when the temperature drift occurs and the temperature drift is relatively large, the probability that the signal processing circuit receives a wake-up signal at a non-adjacent frequency point is increased, thereby increasing the probability of successful wake-up.
  • the multiple transmitting frequency points include at least one frequency point among the first frequency point and the second frequency point. In this way, the probability of receiving a wake-up signal can be increased, thereby increasing the probability of successful wake-up.
  • At least one frequency point among the first frequency point and the second frequency point is within a bandwidth within which the first electronic device transmits a wake-up signal. In this way, the probability of receiving a wake-up signal can be increased, thereby increasing the probability of successful wake-up.
  • the present application provides a wake-up device.
  • the wake-up device includes: a first signal processing circuit, the first signal processing circuit is coupled to the antenna, and is used for monitoring at the first frequency point; a second signal processing circuit, the second signal processing circuit is coupled to the antenna, and is used for monitoring at the first frequency point Monitor on the second frequency point; the second frequency point is different from the first frequency point; when no temperature drift occurs, the second signal processing circuit is also used to receive the wake-up signal on the second frequency point; the bandwidth of the wake-up signal is less than A first value; the wake-up signal is transmitted by the first electronic device at multiple transmission frequency points or at a bandwidth greater than a second value; the second value is greater than the first value.
  • the first signal processing circuit is also used for monitoring on the second frequency point; the second signal processing circuit is also used for monitoring on the third frequency point; the third frequency point and the first frequency point and the second frequency points are all different; the first signal processing circuit is also configured to receive a wake-up signal at the second frequency point.
  • the wake-up signal can still be successfully captured when temperature drift occurs, effectively overcoming the influence of temperature drift.
  • the wake-up device may further include: a third signal processing circuit, the third signal processing circuit is coupled to the antenna, and is used for monitoring on a third frequency point. After the temperature drift occurs, the third signal processing circuit is also used for monitoring at the fourth frequency point. The fourth frequency point is different from the first frequency point, the second frequency point, and the third frequency point.
  • multiple signal processing circuits can be used to monitor multiple different frequency points. The more signal processing circuits there are, the greater the probability of successfully capturing the wake-up signal and the smaller the wake-up time delay.
  • the first signal processing circuit is also used to output a first logic value, and the first logic value is used to indicate that the first signal processing circuit receives a wake-up signal;
  • the second signal processing circuit is also used to output a second logic value Value, the second logic value is used to indicate that the second signal processing circuit has not received the wake-up signal;
  • the device also includes: a first logic or operation circuit, the input end of the first logic or operation circuit is connected with the output end of the first signal processing circuit respectively Coupled with the output end of the second signal processing circuit, the first logical OR operation circuit is used to determine that the wake-up signal is received according to the first logic value and the second logic value. In this way, when any one of the first signal processing circuit and the second signal processing circuit receives the wake-up signal, it can be determined that the wake-up signal is received, which improves the receiving sensitivity.
  • the first signal processing circuit includes: an extremely narrowband bandpass filter, the input end of the extremely narrowband bandpass filter is coupled to the antenna, and is used for extremely narrowband processing of the first signal monitored at the second frequency point.
  • Band-pass filtering to obtain filtered signals with extremely narrow bandwidth
  • envelope detector the input end of the envelope detector is coupled with the output end of the extremely narrow-band band-pass filter, which is used to extract the amplitude envelope of the filtered signal to obtain the baseband pulse signal
  • the comparator the input end of the comparator is coupled with the output end of the envelope detector, and is used to compare the voltage of the baseband pulse signal with the reference voltage to obtain the first digital signal sequence
  • the correlator the input end of the correlator is compared with The output terminal of the device is coupled to obtain the first correlation index value of the first digital signal sequence and the preset wake-up sequence, and compare the first correlation index value with the preset correlation threshold value to obtain a correlation comparison
  • the correlation comparison result indicates that the first correlation index
  • the comparator includes: a first comparator, the input terminal of the first comparator is coupled to the output terminal of the envelope detector, and is used to compare the voltage of the baseband pulse signal with the first reference voltage to obtain the first Alternative digital signal sequence; a second comparator, the input end of the second comparator is coupled to the output end of the envelope detector, and is used to compare the voltage of the baseband pulse signal with the second reference voltage to obtain the second alternative digital signal sequence Signal sequence; the second reference voltage is different from the first reference voltage.
  • the correlator includes: a first correlator, the input terminal of the first correlator is coupled to the output terminal of the first comparator, and is used to obtain the first correlation index between the first candidate digital signal sequence and the preset wake-up sequence value, and compare the first alternative value of the first correlation index value with the preset correlation threshold to obtain the first correlation comparison result; the second correlator, the second correlator The input terminal is coupled to the output terminal of the second comparator, which is used to obtain the second candidate value of the first correlation index value of the second candidate digital signal sequence and the preset wake-up sequence, and compare the first correlation index value The second candidate value of is compared with the preset correlation threshold to obtain a second correlation comparison result.
  • the wake-up device also includes a second logic or operation circuit, the input terminals of the second logic or operation circuit are respectively coupled with the output terminals of the first correlator and the output terminal of the second correlator, and are used to compare the results of the first correlation and the second correlator. Perform logical OR operation on the two correlation comparison results to obtain the first logical OR operation result; when the first logic OR operation result indicates the first alternative value of the first correlation index value and the second alternative value of the first correlation index value At least one of the values is greater than a preset correlation threshold, and the first signal is a wake-up signal.
  • each signal processing circuit a plurality of comparators with different reference voltages are used to compare with the voltage of the baseband pulse signal, and different reference voltages correspond to different distances, so that when the distances between two wireless electronic devices are different, at least One comparator can output an accurate wake-up sequence, thereby successfully waking up the main transceiver in the electronic device and improving the sensitivity.
  • the first signal processing circuit includes: an extremely narrowband bandpass filter, the input end of the extremely narrowband bandpass filter is coupled to the antenna, and is used for extremely narrowband processing of the first signal monitored at the second frequency point.
  • Band-pass filtering to obtain a filtered signal with an extremely narrow bandwidth
  • an envelope detector the input end of which is coupled to the output end of an extremely narrow-band band-pass filter for detecting the amplitude envelope of the filtered signal to obtain a baseband pulse signal
  • a comparator including an integrator circuit the input terminal of the comparator including the integrator circuit is coupled with the output terminal of the envelope detector, and is used to convert the baseband pulse signal into a single pulse signal, and compare the voltage of the single pulse signal with the reference voltage Comparing to obtain a second digital signal sequence
  • a correlator the input end of the correlator is coupled to the output end of the comparator comprising an integrator circuit, and is used to obtain the second correlation between the second digital signal sequence and the preset wake-up sequence index value, and compare
  • the comparator comprising the integrating circuit comprises: a third comparator, the integrating circuit is included in the third comparator, the input terminal of the third comparator is coupled with the output terminal of the envelope detector, and is used to convert the baseband pulse signal Convert to a single pulse signal, and compare the voltage of the single pulse signal with the third reference voltage to obtain a third alternative digital signal sequence; the fourth comparator, which includes an integrating circuit, and the input terminal of the fourth comparator Coupled with the output end of the envelope detector, it is used to convert the baseband pulse signal into a single pulse signal, and the voltage of the single pulse signal is compared with the fourth reference voltage to obtain a fourth candidate digital signal sequence; the fourth reference voltage and The third reference voltages are different.
  • the correlator includes: a third correlator, the input terminal of the third correlator is coupled to the output terminal of the third comparator, and is used to obtain the second correlation index between the third candidate digital signal sequence and the preset wake-up sequence The first alternative value of the value, and compare the first alternative value of the second correlation index value with the preset correlation threshold to obtain the third correlation comparison result; the fourth correlator, the fourth correlator's The input terminal is coupled to the output terminal of the fourth comparator, and is used to obtain the second candidate value of the second correlation index value of the fourth candidate digital signal sequence and the preset wake-up sequence, and compare the second correlation index value The second candidate value of is compared with the preset correlation threshold to obtain a fourth correlation comparison result.
  • the wake-up device also includes a second logic or operation circuit, the input terminals of the second logic or operation circuit are respectively coupled with the output terminals of the third correlator and the output terminal of the fourth correlator, and are used to compare the results of the third correlation Perform a logical OR operation with the fourth correlation comparison result to obtain a second logical OR operation result; when the second logical OR operation result indicates the first alternative value of the second correlation index value and the second second correlation index value At least one of the candidate values is greater than a preset correlation threshold, and the first signal is a wake-up signal.
  • each signal processing circuit a plurality of comparators with different reference voltages are used to compare with the voltage of the baseband pulse signal, and different reference voltages correspond to different distances, so that when the distances between two wireless electronic devices are different, at least One comparator can output an accurate wake-up sequence, thereby successfully waking up the main transceiver in the electronic device and improving the sensitivity.
  • the first frequency point and the second frequency point are adjacent frequency points. In this way, when the temperature drift occurs and the temperature drift is small, the probability that the signal processing circuit receives a wake-up signal at an adjacent frequency point is increased, thereby increasing the probability of successful wake-up.
  • the first frequency point and the second frequency point are non-adjacent frequency points. In this way, when the temperature drift occurs and the temperature drift is relatively large, the probability that the signal processing circuit receives a wake-up signal at a non-adjacent frequency point is increased, thereby increasing the probability of successful wake-up.
  • the multiple transmitting frequency points include at least one frequency point among the first frequency point and the second frequency point. In this way, the probability of receiving a wake-up signal can be increased, thereby increasing the probability of successful wake-up.
  • At least one frequency point among the first frequency point and the second frequency point is within a bandwidth within which the first electronic device transmits the wake-up signal. In this way, the probability of receiving a wake-up signal can be increased, thereby increasing the probability of successful wake-up.
  • the present application provides an electronic device.
  • the electronic device includes a memory and a processor, the memory is coupled to the processor; the memory stores program instructions, and when the program instructions are executed by the processor, the electronic device executes the first aspect or wakes up in any possible implementation manner of the first aspect method.
  • the present application provides a computer-readable storage medium.
  • the computer-readable storage medium includes a computer program, and when the computer program is run on the electronic device, the electronic device is made to execute the wake-up method in the first aspect or any possible implementation manner of the first aspect.
  • FIG. 1 is a schematic diagram of sending timing and receiving timing of a scheme using a low duty cycle shown by way of example;
  • FIG. 2 is a schematic diagram of an application scenario of an exemplary wake-up method
  • Fig. 3 is the flow chart of the wake-up method shown exemplary
  • FIG. 4 is a schematic structural diagram of an exemplary transmitter and receiver
  • FIG. 5 is a schematic structural diagram of the wake-up receiver 220 in FIG. 4 exemplarily shown;
  • FIG. 6 is a schematic diagram illustrating the signal transmission relationship between the signal processing circuit 222 and the logical OR operation circuit 223 in FIG. 5;
  • FIG. 7 is a schematic structural diagram of the signal processing circuit 222 in FIG. 5 exemplarily shown;
  • FIG. 8 is a schematic diagram of a signal transmission relationship between a comparator and a correlator shown exemplarily;
  • FIG. 9 is a schematic diagram of the transmitting signal of the transmitter and the receiving signal of the wake-up receiver in the multi-frequency point transmission mode
  • Fig. 10 is a schematic diagram showing the comparison of the bandwidth of the transmitter's transmission signal and the wake-up receiver's reception signal in the multi-frequency point transmission mode with the bandwidth of the transmitter's transmission signal and the wake-up receiver's reception signal in the traditional solution;
  • FIG. 11 is a timing diagram of an exemplary transmitter 100 transmitting a wake-up signal
  • FIG. 12 is a schematic diagram of the principles of the multi-frequency point transmission method against temperature drift
  • FIG. 13 is an exemplary flow chart of listening to frequency points for transmitting wake-up signals
  • FIG. 14 is a schematic diagram illustrating that multiple frequency points for transmitting wake-up signals are non-adjacent frequency points
  • FIG. 15 is a schematic diagram illustrating that multiple frequency points for transmitting wake-up signals are adjacent frequency points
  • FIG. 16 is a schematic diagram showing a comparison between frequency points for transmitting wake-up signals and operating frequency points for wake-up receivers
  • Fig. 17 is a schematic diagram of the transmitting signal of the transmitter and the receiving signal of waking up the receiver in the large-bandwidth transmission mode;
  • FIG. 18 is a schematic diagram of the principle of combating temperature drift in a large-bandwidth transmission mode
  • Fig. 19 is a schematic diagram showing bandwidth comparison between the transmitter's transmission signal and the wake-up receiver's reception signal in the large-bandwidth transmission mode and the traditional solution;
  • FIG. 20 is a physical frame structure diagram of an exemplary wake-up signal
  • FIG. 21 is another physical frame structure diagram of an exemplary wake-up signal
  • Fig. 22 is a schematic block diagram of an apparatus 900 according to an embodiment of the present application.
  • first and second in the description and claims of the embodiments of the present application are used to distinguish different objects, rather than to describe a specific order of objects.
  • first target object, the second target object, etc. are used to distinguish different target objects, rather than describing a specific order of the target objects.
  • words such as “exemplary” or “for example” are used as examples, illustrations or illustrations. Any embodiment or design scheme described as “exemplary” or “for example” in the embodiments of the present application shall not be interpreted as being more preferred or more advantageous than other embodiments or design schemes. Rather, the use of words such as “exemplary” or “such as” is intended to present related concepts in a concrete manner.
  • multiple processing units refer to two or more processing units; multiple systems refer to two or more systems.
  • the wake-up method in the embodiment of the present application may be applied to a wake-up scene between a first electronic device and one or more second electronic devices.
  • the first electronic device may be, for example, a mobile phone, a tablet computer, a smart watch, a Wi-Fi router, a sensor network information collection device, a central node, a drone, a base station (Base Station) and other electronic devices.
  • the second electronic device may be, for example, a mobile phone, a tablet computer, a Wi-Fi router, an electronic tag, a wireless earphone, a smart meter, a smart watch, and other electronic devices.
  • FIG. 1 is a schematic diagram of a transmission timing and a reception timing of a scheme using a low duty cycle shown by way of example.
  • the transmitter transmits a signal every 20ms (milliseconds), wherein, the transmitter works for 3ms in each cycle (20ms).
  • the receiver's shortest delay is 3ms, but the longest delay can reach 543ms.
  • Fig. 2 is a schematic diagram of an application scenario of the wake-up method exemplarily shown. Please refer to Figure 2.
  • the wake-up method of the embodiment of the present application can be used to wake up the electronic tag, smart watch, wireless headset, A Wi-Fi router or a set of smart meters.
  • the mobile phone can establish a communication protocol based on a communication protocol such as Wi-Fi protocol, Bluetooth (Blue Tooth, BT) protocol, device-to-device (Device-to-Device , D2D) protocol, cellular mobile communication protocol, etc., for data communication.
  • a communication protocol such as Wi-Fi protocol, Bluetooth (Blue Tooth, BT) protocol, device-to-device (Device-to-Device , D2D) protocol, cellular mobile communication protocol, etc.
  • the wake-up method is applied to a wake-up system including a first electronic device and a second electronic device.
  • the first electronic device is a wake-up device
  • the second electronic device is a wake-up device.
  • the main transceiver in the second electronic device is used for data communication with the first electronic device, but the main transceiver usually has high power consumption.
  • the standby process of the second electronic device if the main transceiver is kept on, it will be extremely The standby power consumption of the second electronic device is greatly increased.
  • the embodiment of the present application proposes a new receiver architecture for the second electronic device, and on this basis, proposes the wake-up method of the embodiment of the present application.
  • Fig. 3 is a flow chart of a wake-up method exemplarily shown.
  • the wake-up method may be executed by the wake-up receiver 220 in FIG. 4 . Please refer to Figure 3.
  • the wake-up method may include:
  • Step S301 the first signal processing circuit monitors on the first frequency point
  • Step S302 the second signal processing circuit monitors at the second frequency point; the second frequency point is different from the first frequency point;
  • Step S303 the second signal processing circuit receives the wake-up signal at the second frequency point; the bandwidth of the wake-up signal is smaller than the first value; the wake-up signal is transmitted by the first electronic device at multiple transmission frequency points or at a frequency greater than the second value transmitted over the bandwidth; the second value is greater than the first value;
  • Step S304 the first signal processing circuit monitors the second frequency point
  • Step S305 the second signal processing circuit monitors the third frequency point; the third frequency point is different from the first frequency point and the second frequency point;
  • Step S306 the first signal processing circuit receives a wake-up signal at the second frequency point.
  • the first signal processing circuit and the second signal processing circuit are circuits in the subsequent wake-up receiver in FIG. 4 .
  • the wake-up method in the embodiment of the present application will be described in further detail below in combination with the receiver and the internal structure of the wake-up receiver.
  • Fig. 4 is a schematic structural diagram of a transmitter and a receiver shown exemplarily.
  • the first electronic device in the embodiment of the present application includes the transmitter 100 in FIG. 4
  • the second electronic device includes the receiver 200 in FIG. 4 .
  • the transmitter 100 may be compatible with transmitters of existing communication systems such as cellular, WiFi, and Bluetooth, and perform data communication with the main transceiver based on traditional protocols.
  • the receiver 200 may include a switch 210 , a wake-up receiver 220 , a controller 230 and a main transceiver 240 .
  • the switch 210 is coupled to the receiver antenna, the wake-up receiver 220, the controller 230 and the main transceiver 240, respectively.
  • the wake-up receiver 220 is coupled to the switch 210 and the controller 230, respectively.
  • the controller 230 is coupled to the wake-up receiver 220 and the main transceiver 240, respectively.
  • the main transceiver 240 is coupled to the switch 210 and the controller 230, respectively.
  • a wake-up receiver 220 may be included in the receiver 200 .
  • a set of wake-up receivers 220 may be included in the receiver 200 .
  • the antenna of the receiver 200 receives the radio frequency signal transmitted by the antenna of the transmitter 100 (for the convenience of description, hereinafter referred to as the transmitting antenna), the radio frequency signal includes a wake-up signal and a data signal, wherein, The wake-up signal is used to wake up the main transceiver 240 in the receiver 200, that is, to switch the main transceiver 240 from the sleep state to the working state; the data signal is used for data communication between the first electronic device and the second electronic device.
  • the working principle of the receiver 200 shown in FIG. 4 is: during the standby process of the second electronic device where the receiver 200 is located, the main transceiver 240 is in a dormant state, and the wake-up receiver 220 is in a working state; if the wake-up receiver 220 receives the first When the transmitter 100 of an electronic device sends a wake-up signal, the wake-up receiver 220 sends a signal indicating to wake up the main transceiver 240 to the controller 230, and then the wake-up receiver 220 enters a dormant state. After the controller 230 receives the signal indicating to wake up the main transceiver 240, it can control the main transceiver 240 to switch from the sleep state to the working state.
  • the controller 230 may also control the main transceiver 240 to remain in the dormant state.
  • the controller 230 may also control to switch the main transceiver 240 from the dormant state to the working state after a period of delay.
  • the working process of the receiver 200 may be different, but the working principle of the receiver 200 is the same as the foregoing working principle.
  • An exemplary coupling relationship of components in the receiver 200 is used below to provide a working process of the receiver 200 based on the exemplary coupling relationship.
  • the switch 210 may include two input terminals and two output terminals.
  • One input terminal of the switch 210 (referred to as the first input terminal for convenience of description herein) is coupled to the receiver antenna, and the other input terminal (referred to as the second input terminal for convenience of description herein) of the switch 210 is coupled to the controller 230 .
  • One output terminal of the switch 210 (for convenience of description, referred to as the first output terminal herein) is coupled to the wake-up receiver 220, and the other output terminal (for convenience of description, herein referred to as the second output terminal) is coupled to the main transceiver 240 coupling.
  • the switch 210 couples the first input end to the first output end, or couples the first input end to the second output end.
  • the wake-up receiver 220 may include two inputs and one output.
  • the wake-up receiver 220 is connected to the switch 210 and the controller 230 respectively.
  • an input end of the wake-up receiver 220 (for convenience of description, referred to as the first input end of the wake-up receiver 220 herein) is coupled with the switch 210, and the output end of the wake-up receiver 220 is connected with the control device 230 coupling.
  • another input terminal of the wake-up receiver 220 (for convenience of description, referred to as the second input terminal of the wake-up receiver 220 herein) is coupled to the controller 230 .
  • the controller 230 may include two input terminals and three output terminals.
  • One input terminal of the controller 230 (for convenience of description, referred to herein as the first input terminal of the controller 230) is coupled to the wake-up receiver 220, and the other input terminal (for convenience of description, referred to herein as the first input terminal of the controller 230) is coupled to the wake-up receiver 220.
  • Two input terminals) are coupled with the main transceiver 240.
  • An output terminal of the controller 230 (for convenience of description, referred to herein as the first output terminal of the controller 230) is coupled to the switch 210, and an output terminal (for convenience of description, referred to herein as the second output terminal of the controller 230) is coupled to the switch 210. ) is coupled with the main transceiver 240 , and the other output terminal (for convenience of description, referred to as the third output terminal of the controller 230 herein) is coupled with the wake-up receiver 220 .
  • the main transceiver 240 may include two inputs and two outputs.
  • One input terminal of the main transceiver 240 (for convenience of description, referred to herein as the first input terminal of the main transceiver 240) is coupled to the switch 210, and the other input terminal (for convenience of description, referred to herein as the first input terminal of the main transceiver 240) is coupled to the switch 210.
  • the second input terminal is coupled with the controller 230.
  • One output terminal of the main transceiver 240 (for convenience of description, referred to herein as the first output terminal of the main transceiver 240) is coupled with the switch 210, and the other output terminal (for convenience of description, referred to herein as the first output terminal of the main transceiver 240) is coupled to the switch 210.
  • the second output terminal is coupled with the controller 230.
  • the working process of the receiver 200 can be as follows:
  • the first input end of the switch 210 is coupled to the first output end of the switch 210 , and the first input end of the switch 210 and the second output end of the switch 210 remain disconnected.
  • the wake-up receiver 220 is in the working state, and the main transceiver 240 is in the sleep state.
  • the transmitter 100 transmits a wake-up signal through the transmitting antenna.
  • the wake-up receiver 220 receives the wake-up signal transmitted by the transmitter 100 through the first input terminal of the wake-up receiver 220, it generates a signal indicating to wake up the main transceiver 240, and sends the signal indicating to wake up the main transceiver 240 to the controller 230 . And, wake up the receiver 220 to switch from the working state to the sleeping state.
  • the controller 230 receives the signal indicating to wake up the main transceiver 240 sent by the wake-up receiver 220 through the first input terminal of the controller 230, generates the first control information indicating that the switch 210 points to the main transceiver 240, and generates a signal indicating that the main transceiver 240 switches to the second control information of the working state, sends the first control information to the switch 210 through the first output end of the controller 230, and sends the second control information to the main transceiver 240 through the second output end of the controller 230 .
  • the switch 210 receives the first control information sent by the controller 230 through the second input end of the switch 210, and switches the first input end of the switch 210 to couple with the second output end of the switch 210 according to the first control information. At this time, the switch 210 Switch between the first input end of the switch 210 and the first output end of the switch 210 to the state of disconnecting the coupling, the first input end of the main transceiver 240 passes through the second output end of the switch 210, the first input end of the switch 210 and the first input end of the switch 210. Receiver antenna coupling.
  • the main transceiver 240 After the main transceiver 240 receives the second control information through the second input terminal of the main transceiver 240, it switches from the dormant state to the working state. So far, a wake-up process is completed.
  • the main transceiver 240 After the main transceiver 240 switches from the dormant state to the working state, it can send a wake-up success notification to the transmitter 100 through the first output terminal.
  • the transmitter 100 may stop sending the wake-up signal after receiving the wake-up success notification.
  • the transmitter 100 establishes a communication connection with the main transceiver 240 in the receiver 200 based on a communication protocol, such as a Bluetooth protocol, a WiFi protocol, a D2D protocol, and the like.
  • a communication protocol such as a Bluetooth protocol, a WiFi protocol, a D2D protocol, and the like.
  • the transmitter 100 transmits the data signal to the receiver 200 through the transmitting antenna, and the main transceiver 240 in the receiver 200 receives the data signal and performs corresponding processing to perform data communication with the transmitter 100 .
  • the main transceiver 240 When the main transceiver 240 does not receive the data signal for a period of time reaching the preset time threshold, the main transceiver 240 can send a sleep notification message to the controller 230 through the second output terminal, and then switch from the working state to the sleeping state.
  • the second electronic device where the main transceiver 240 is located enters a standby state.
  • the controller 230 receives the dormancy notification information sent by the main transceiver 240 through the second input terminal of the controller 230, generates the third control information indicating that the switch 210 is directed to wake up the receiver 220, and generates an instruction to wake up the receiver 220 to switch to the working state Send the third control information to the switch 210 through the first output terminal of the controller 230 , and send the fourth control information to the wake-up receiver 220 through the third output terminal of the controller 230 .
  • the wake-up receiver 220 receives the fourth control information through the second input terminal of the wake-up receiver 220, and switches from the dormant state to the working state according to the instruction of the fourth control information.
  • the receiving antenna performs listening and scanning until the wake-up signal transmitted by the transmitter 100 is received again, and the next wake-up is performed.
  • the above working process of the receiver 200 is only an example for illustrating the working principle of the receiver 200 , and is not intended to limit the working process of the receiver 200 .
  • the receiver 200 can adopt other coupling relationships different from the coupling relationships in the above examples, and the receiver 200 can adopt different coupling relationships based on the other coupling relationships. Examples of working processes for other working processes.
  • the second output terminal of the controller 230 can be removed.
  • the controller 230 receives the signal sent by the wake-up receiver 220
  • the signal indicating to wake up the main transceiver 240 generates the first control information indicating that the first input end of the switch 210 is switched to be coupled with the second output end of the switch 210, without generating the second control information indicating that the main transceiver 240 is switched to the working state.
  • the control information is to send the first control information to the switch 210 through the first output terminal of the controller 230 .
  • the switch 210 receives the first control information sent by the controller 230 through the second input end of the switch 210, and switches the first input end of the switch 210 to couple with the second output end of the switch 210 according to the first control information. At this time, the switch 210 Switch between the first input end of the switch 210 and the first output end of the switch 210 to the state of disconnecting the coupling, the first input end of the main transceiver 240 passes through the second output end of the switch 210, the first input end of the switch 210 and the first input end of the switch 210. Receive antenna coupling.
  • the main transceiver 240 switches from the sleep state to the working state in response to detecting that the first input terminal of the main transceiver 240 is coupled to the receiving antenna through the second output terminal of the switch 210 and the first input terminal of the switch 210 .
  • the wake-up triggering condition may be set according to actual application requirements.
  • the wake-up trigger condition may be: the first electronic device where the transmitter 100 is located receives communication data that needs to be forwarded to the second electronic device where the receiver 200 is located.
  • the communication data may be, for example, voice information, video information, etc. .
  • the wake-up trigger condition may be: the first electronic device where the transmitter 100 is located generates an instruction to start wake-up in response to a user's trigger operation. It should be noted that the two wake-up trigger conditions are only illustrative examples, and the embodiment of the present application does not limit the wake-up trigger conditions.
  • the main transceiver 240 can be a module shared by various communication protocols such as cellular, Wifi, Bluetooth, etc.
  • a microcontroller unit (Microcontroller Unit, MCU) may be used as the controller 230.
  • an electronic device may only be used as the above-mentioned first electronic device.
  • the base station is the first electronic device, and the base station includes the The transmitter 100 shown in FIG. 4 does not include the receiver 200 shown in FIG. 4 .
  • an electronic device can also be used only as the above-mentioned second electronic device.
  • the electronic tag is the second electronic device, and the electronic tag includes the The receiver 200 shown in Fig. 4 does not include the transmitter 100 shown in Fig. 4 .
  • an electronic device can be used both as the above-mentioned first electronic device and as the above-mentioned second electronic device.
  • the electronic device corresponds to two wake-up systems, such as a mobile phone.
  • the mobile phone In the wake-up system of the electronic tag, the mobile phone is the first electronic device, and in the wake-up system including the base station and the mobile phone, the mobile phone is the second electronic device.
  • the mobile phone includes the receiver 200 corresponding to the transmitter 100 in the base station , also includes the transmitter 100 corresponding to the receiver 200 in the electronic tag.
  • the embodiment of the present application does not limit the communication distance between the first electronic device and the second electronic device in the wake-up process in the wake-up system.
  • FIG. 5 is a schematic structural diagram of the wake-up receiver 220 in FIG. 4 exemplarily shown.
  • the wake-up receiver 220 may include a radio frequency signal matching network 221 , multiple parallel signal processing circuits 222 , a logical OR operation circuit 223 , and a wake-up signal generator 224 .
  • the input end of the radio frequency signal matching network 221 is coupled to the receiver antenna, the output end of the radio frequency signal matching network 221 is respectively coupled to the input end of each signal processing circuit, and the input end of each signal processing circuit is connected to the logical OR operation circuit 223.
  • the input terminal is coupled, and the output terminal of the logical OR operation circuit 223 is coupled to the wake-up signal generator 224 .
  • the radio frequency signal matching network 221 is used to implement impedance matching between the wake-up receiver 220 and the receiver antenna.
  • the signal processing circuit 222 is used to process the input signal (herein, the input signal is the signal transmitted by the transmitter 100 in the first electronic device received by the receiving antenna), and determine whether there is a correlation between the input signal and the locally stored wake-up sequence If there is a signal whose correlation is greater than a preset correlation threshold, it is determined that a wake-up signal is received.
  • the signal processing circuit 222 When the correlation between the wake-up sequence included in the input signal and the locally stored wake-up sequence is greater than a preset correlation threshold, the signal processing circuit 222 outputs a signal (such as a digital signal 1 or a high level signal) indicating that the wake-up signal is received, otherwise A signal (eg, a digital 0 or a low signal) indicating that no wake-up signal has been received is output.
  • the logical OR operation circuit 223 is used for performing a logical OR operation on the high and low level signals or digital signals output by the multiple parallel signal processing circuits 222 .
  • the signal (such as digital signal 1 or high level signal) that outputs indication to receive the wake-up signal is given to the wake-up signal generator 224, if the logic OR operation result is 0, then Output a signal (such as a digital signal 0 or a low level signal) indicating that no wake-up signal is received to the wake-up signal generator 224 .
  • the wake-up signal generator 224 receives a signal indicating that the wake-up signal is received from the logical OR operation circuit 223 , it generates a signal indicating to wake up the main transceiver 240 and sends the signal to the controller 230 .
  • the controller 230 So that after the controller 230 receives the signal indicating to wake up the main transceiver 240, it will generate the first control information indicating that the switch 210 points to the main transceiver 240, and generate the second control information indicating that the main transceiver 240 is switched to the working state.
  • the first control information is sent to the switch 210 through the first output terminal of the controller 230
  • the second control information is sent to the main transceiver 240 through the second output terminal of the controller 230 .
  • the wake-up signal generator 224 receives a signal from the logical OR operation circuit 223 indicating that no wake-up signal has been received, the wake-up signal generator 224 maintains the original state.
  • the working frequency points of the multiple signal processing circuits 222 are different, and each signal processing circuit 222 receives the wake-up signal at its own working frequency point.
  • FIG. 6 is a schematic diagram illustrating the signal transmission relationship between the signal processing circuit 222 and the logical OR operation circuit 223 in FIG. 5 .
  • the signal indicating that a wake-up signal is received is a digital signal 1
  • the signal indicating that a wake-up signal is not received is a digital signal 0.
  • FIG. 6 assuming that there are n signal processing circuits in total, which are signal processing circuit 1, signal processing circuit 2...and signal processing circuit n.
  • Each signal processing circuit processes the input signal separately, wherein, after the signal processing circuit 1 processes the input signal, it outputs 1, after the signal processing circuit 2 processes the input signal, it outputs 0, ... the signal processing circuit n pairs the input After the signal is processed, 1 is output.
  • the logical OR operation circuit performs logical OR operation on the digital signals output by the n-channel signal processing circuits, and outputs the operation result 1. In this way, as long as at least one signal processing circuit outputs 1 after processing the input signal, the operation result output by the logic or operation circuit is all 1, and the digital signal 1 is used to subsequently trigger the controller 230 to wake up the main transceiver 240 . When all signal processing circuits in the wake-up receiver 220 output 0, the operation result output by the logical OR operation circuit is 0, and the digital signal 0 will not trigger the wake-up of the main transceiver 240 .
  • the embodiment of the present application uses multiple parallel signal processing circuits to increase the probability that the wake-up receiver 220 successfully captures the wake-up signal and the probability that the transceiver 240 is woken up, thereby reducing the wake-up delay.
  • the wake-up receiver 220 may also include only one signal processing circuit 222 .
  • the logic OR operation circuit 223 is not included in the wake-up receiver 220 , and the signal output by the signal processing circuit 222 is directly transmitted to the wake-up signal generator 224 . In this way, the structure of the wake-up receiver 220 can be simplified, hardware cost can be saved, and power consumption can be reduced.
  • FIG. 7 is a schematic structural diagram of the signal processing circuit 222 in FIG. 5 exemplarily shown.
  • the signal processing circuit 222 may include an extremely narrow bandpass filter 222a, an envelope detector 222b, multiple parallel comparators 222c and correlators 222d, and a logical OR operation circuit 222e.
  • the input end of the extremely narrowband bandpass filter 222a is coupled to the output end of the radio frequency signal matching network 221, the output end of the extremely narrowband bandpass filter 222a is coupled to the input end of the envelope detector 222b, and the output end of the envelope detector 222b Respectively coupled to the input of each comparator 222c, the output of the comparator 222c is coupled to the input of the correlator 222d, the output of the correlator 222d is coupled to the input of the logic or operation circuit 222e, the logic or operation circuit 222e The output terminal of is coupled with the input terminal of the logical OR operation circuit 223 shown in FIG. 5 .
  • the very narrow band pass filter 222a is used to filter the input signal to obtain a filtered signal with a very narrow bandwidth.
  • the extremely narrow bandpass filter 222a has a very high carrier frequency-to-bandwidth ratio, can effectively filter out-of-band noise and interference, and significantly improve the anti-interference ability of the wake-up receiver 220 .
  • the envelope detector 222b is used to extract the amplitude envelope of the filtered signal output by the ultra-narrowband bandpass filter 222a to obtain a baseband pulse signal.
  • the comparator 222c and correlator 222d in each path are connected in series.
  • the comparator 222c is used to compare the voltage of the baseband pulse signal output by the envelope detector 222b with the reference voltage, and output a 0/1 level sequence. Wherein, when the voltage of the baseband pulse signal is greater than or equal to the reference voltage, the comparator 222c outputs 1; when the voltage of the baseband pulse signal is less than or equal to the reference voltage, the comparator 222c outputs 0.
  • the comparator 222c may include an integrator circuit for converting the input baseband pulse signal into a single pulse signal, and then comparing the voltage of the single pulse signal with a reference voltage.
  • the reference voltage values used by different comparators 222c are different, and the different reference voltage values are adapted to the different distances between the first electronic device and the second electronic device, so that the first electronic device and the second electronic device When the devices are at different distances, at least one comparator 222c can output an accurate 0/1 level sequence, thereby improving the sensitivity of waking up the receiver.
  • the transmission power of the transmitter 100 is constant, the greater the distance between the first electronic device and the second electronic device, the weaker the above-mentioned input signal received by the wake-up receiver 220, and correspondingly, the voltage of the baseband pulse signal or the baseband pulse signal The smaller the converted single pulse signal is, the smaller the required reference voltage is at this time. Conversely, the smaller the distance between the first electronic device and the second electronic device, the stronger the above-mentioned input signal received by the wake-up receiver 220, and correspondingly, the higher the voltage of the baseband pulse signal or the single pulse signal converted from the baseband pulse signal is. At this time, the required reference voltage is also larger.
  • Table 1 is a correspondence table between the distance d between the first electronic device and the second electronic device and the reference voltage value V.
  • the correlator 222d is used to obtain the correlation index value of the 0/1 level sequence output by the comparator 222c and the wake-up sequence stored locally in the current device (that is, the preset wake-up sequence), if the correlation index value of the two sequences greater than the preset correlation threshold, the correlator 222d outputs a signal indicating that a wake-up signal has been received (such as a digital signal 1 or a high level signal), otherwise it outputs a signal indicating that a wake-up signal has not been received (such as a digital signal 0 or a low level signal) Signal).
  • the logical OR operation circuit 222e is used for performing logical OR operation on the high and low level signals or digital signals output by the multiple parallel comparators 222c and correlators 222d. Assume that the signal indicating that the wake-up signal has been received is a digital signal 1, and the signal indicating that the wake-up signal has not been received is a digital signal 0. The logical OR operation circuit 222 e outputs the logical OR operation result to the logical OR operation circuit 223 .
  • FIG. 8 is a schematic diagram illustrating the signal transmission relationship between the comparator and the correlator. Please refer to FIG. 8 , assuming that each signal processing circuit includes k comparators and correlators, which are respectively comparator 1 and correlator 1, comparator 2 and correlator 2 . . . comparator k and correlator k. The same baseband pulse signal is input to each comparator and correlator respectively, comparator 1 and correlator 1 output digital signal 0 after processing the baseband pulse signal, comparator 2 and correlator 2 output digital signal after processing the baseband pulse signal 0, ...
  • the comparator k and the correlator k output the digital signal 0 after processing the baseband pulse signal, that is, the output of all correlators is a digital signal 0, and the logic or operation circuit 222e outputs a digital signal 0, and the logic or operation circuit 222e
  • the output is the output of the corresponding signal processing circuit. If at least one of the k comparators and correlators outputs a digital signal 1, the output of the corresponding signal processing circuit is a digital signal 1, so that the main transceiver 240 can be woken up.
  • the embodiment of the present application improves the sensitivity of the wake-up receiver 220 by connecting multiple parallel comparators with different reference voltages and corresponding correlators, which helps to reduce the wake-up delay.
  • each signal processing circuit 222 may only include one comparator 222c and a correlator 222d.
  • the logic or operation circuit 222e is not included in the signal processing circuit 222, and the correlator 222d directly outputs the digital signal to the logic or operation circuit 223 (there are multiple signal processing circuits 222 in the wake-up receiver 220 at this time) or output to the wake-up signal processing circuit 222.
  • the signal generator 224 (there is only one signal processing circuit 222 in the wake-up receiver 220 at this time). In this way, the structure of the signal processing circuit 222 can be simplified, hardware cost can be saved, and power consumption can be reduced.
  • the bandwidth of the extremely narrowband bandpass filter 222a is very small.
  • the bandwidth of the extremely narrowband bandpass filter 222a may be less than 1 MHz.
  • the anti-jamming ability of the wake-up receiver 220 can be significantly improved by using an extremely narrow band-pass filter 222a with a very small bandwidth.
  • the very narrow bandpass filter 222a suffers from temperature drift.
  • the temperature drift of the ultra-narrowband bandpass filter 222a is the temperature drift of the signal processing circuit 222 where the ultranarrowband bandpass filter 222a is located.
  • the designed operating frequency of the ultra-narrowband bandpass filter 222a is f
  • the ultranarrowband bandpass filter 222a actually works the actual operating frequency is f', and f' and f are different frequency points.
  • the embodiment of the present application proposes a corresponding way of transmitting a wake-up signal.
  • the transmitter 100 shown in FIG. 4 may transmit a wake-up signal in the following manner.
  • the first method of transmitting a wake-up signal is a multi-frequency point transmission method.
  • the transmitter 100 transmits wake-up signals with narrow bandwidths at multiple frequency points.
  • the bandwidth of the wake-up signal can be set according to application requirements, for example, less than 1 MHz.
  • FIG. 9 is a schematic diagram of a transmission signal of a transmitter and a reception signal of a wake-up receiver in a multi-frequency point transmission manner.
  • the received signal for waking up the receiver refers to the filtered signal obtained after being filtered by the ultra-narrowband bandpass filter 222a.
  • the transmitter 100 may transmit narrow-bandwidth wake-up signals at four frequency points of frequency point 1, frequency point 2, frequency point 3, and frequency point 4, respectively.
  • the wake-up receiver 220 performs extremely narrow-band filtering on the aforementioned input signals received by the receiving antenna through the extremely narrow-band band-pass filters 222a in multiple parallel signal processing circuits of different operating frequencies, as long as any extremely narrow-band band-pass filter 222a filters the filtered signal at any one of frequency point 1, frequency point 2, frequency point 3, and frequency point 4 as a wake-up signal, and the main transceiver 240 can be successfully woken up.
  • the operating frequency of the first signal processing circuit is frequency 2
  • the operating frequency of the second signal processing circuit is frequency 3.
  • the transmitting frequency points of the machine 100 are frequency point 1, frequency point 2, frequency point 3, and frequency point 4 respectively. If the operating frequency of the signal processing circuit of this channel has temperature drift, the actual operating frequency of the first signal processing circuit after the temperature drift is frequency 5, and the actual operating frequency of the second signal processing circuit after the temperature drift is frequency 5. The point is frequency point 1, then the second signal processing circuit can successfully receive the wake-up signal at frequency point 1 after temperature drift. If the transmitter 100 only transmits the wake-up signal through a single frequency point, for example, only transmits the wake-up signal at frequency 4, the above two signal processing circuits cannot receive the wake-up signal after temperature drift.
  • the multi-frequency point transmission method increases the matching probability between the actual working frequency point after the temperature drift of the signal processing circuit and the frequency point for transmitting the wake-up signal by increasing the number of transmitting frequency points, and can effectively counteract the impact caused by temperature drift. Influence.
  • the bandwidth of the transmitted wake-up signal is equal to the bandwidth of the ultra-narrowband bandpass filter 222a in the wake-up receiver 220 (for convenience of description, referred to herein as the receiving bandwidth).
  • the bandwidth of the transmitted wake-up signal and the bandwidth of the very narrow bandpass filter 222a in the wake-up receiver 220 may be 100 KHz.
  • the number of frequency points for transmitting wake-up signals shown in FIG. 9 is only a schematic illustration. In other embodiments of the present application, more or fewer frequency points for transmitting wake-up signals can be set according to actual application requirements. point, the embodiment of the present application does not limit the number of frequency points for transmitting the wake-up signal.
  • the bandwidth of the wake-up signal transmitted and the bandwidth of the extremely narrow band-pass filter 222a in the wake-up receiver 220 listed above are also schematic illustrations. In practical applications, the narrow bandwidth can be determined according to requirements (in the multi-frequency point transmission mode) The bandwidth of the transmitted wake-up signal, the bandwidth of the extremely narrow band-pass filter 222a in the wake-up receiver 220) upper limit value and the actual bandwidth value.
  • Fig. 10 is a schematic diagram showing the bandwidth comparison between the transmitting signal of the transmitter and the receiving signal of waking up the receiver in the multi-frequency transmission method and the bandwidth of the transmitting signal of the transmitter and the receiving signal of waking up the receiver in the traditional solution.
  • the received signal for waking up the receiver in the multi-frequency point transmission mode refers to the filtered signal obtained after being filtered by the ultra-narrowband bandpass filter 222a.
  • Figure 10 In the multi-frequency point transmission mode, both the transmitting signal of the transmitter and the receiving signal of the wake-up receiver are extremely narrow-band signals, while in the traditional solution, the transmitting signal of the transmitter and the receiving signal of the receiver are both broadband signals.
  • the signal received by the wake-up receiver in the embodiment of the present application is a narrow-bandwidth signal, which can filter out more noise and interference, thus improving the anti-interference capability.
  • the transmission power of the transmitter 100 is concentrated in the narrow bandwidth of the wake-up signal, which has a higher power density than the broadband transmission signal in the related scheme, so the wake-up receiver of the embodiment of the present application The signal-to-interference ratio is higher.
  • Fig. 12 is a schematic diagram schematically illustrating the principle of combating temperature drift in a multi-frequency point transmission manner.
  • the operating frequency of the wake-up receiver is set as frequency 3 during design, but in actual operation, the operating frequency of the wake-up receiver is changed to frequency 4 due to the influence of temperature drift.
  • the wake-up receiver can still receive the wake-up signal at the actual working frequency point (frequency point 4) after the temperature drift occurs , so that the main receiver can be successfully woken up in the presence of temperature drift.
  • the transmitter 100 can transmit the wake-up signal of each frequency point according to the preset transmission cycle, and in each transmission cycle, time-division transmits at each frequency point according to the preset transmission sequence. wake up signal.
  • FIG. 11 is a timing diagram of exemplary transmission of a wake-up signal by the transmitter 100 . Please refer to FIG. 11 , assuming that the frequency points where the transmitter 100 transmits the wake-up signal include frequency point 1, frequency point 2 ... frequency point n, which are n frequency points, at time t1, the transmitter 100 transmits the wake-up signal at frequency point 1, and at time t1 At time t2, transmitter 100 transmits a wake-up signal at frequency point 1, ...
  • transmitter 100 transmits a wake-up signal at frequency point n, at time tn+1, transmitter 100 transmits a wake-up signal at frequency point 1, at time At tn+2, the transmitter 100 transmits a wake-up signal at frequency point 1, ... At time t2n, the transmitter 100 transmits a wake-up signal at frequency point n.
  • t2n 2tn.
  • the transmitter 100 can transmit the wake-up signal of each frequency point according to the preset transmission cycle, and in each transmission cycle, each frequency point is monitored respectively, and the frequency point satisfies the In the preset idle condition, a wake-up signal is sent at this frequency point.
  • a wake-up signal can be transmitted at the frequency point with the highest priority according to the preset frequency point priority.
  • a carrier sense multiple access/collision avoidance (Carrier Sense Multiple Access with Collision Avoidance, CSMA/CA) technology may be used for interception.
  • CSMA/CA Carrier Sense Multiple Access with Collision Avoidance
  • the CSMA/CA technology is only an example of the interception technology in the embodiment of the present application, and the embodiment of the present application does not limit the interception technology.
  • the idle condition may be, for example: the continuous idle duration of the frequency point reaches a preset time threshold.
  • the time threshold can be determined according to application requirements.
  • all transmission frequency points can adopt the same interception process.
  • the following uses an example to illustrate the listening process of each frequency point.
  • Fig. 13 is a flow chart of listening to frequency points for transmitting wake-up signals exemplarily shown. Referring to Figure 13, for each frequency point that emits a wake-up signal, the listening process may include the following steps:
  • Step S801 when there is a wake-up signal physical frame to be sent at the frequency point, start listening.
  • each frequency point that transmits the wake-up signal has a physical frame of the wake-up signal that needs to be sent. Assuming that the transmission period is T, if within the transmission period T, the physical frame of the wake-up signal corresponding to a certain frequency point fj has not been sent, then determine the physical frame of the wake-up signal to be sent at the frequency point fj; if within the transmission period T, the frequency point If the physical frame of the wake-up signal corresponding to fj has been sent, it is determined that there is no physical frame of the wake-up signal to be sent at the frequency point fj.
  • Step S802 determine whether the continuous idle time of the frequency point reaches the preset time threshold, if the continuous idle time of the frequency point reaches the preset time threshold, execute step S803, otherwise, if the continuous idle time of the frequency point has not reached the preset time threshold A time threshold is set, and step S802 is executed.
  • a timer can be started for each frequency point that transmits a wake-up signal, and the idle time of the frequency point is accumulated. If the frequency point is occupied during the accumulation process, the The accumulated time of the timer is cleared and accumulated again. In this way, by querying the current cumulative time of the timer corresponding to the frequency point, and comparing the current cumulative time with the preset time threshold, it can be determined whether the continuous idle time of the frequency point reaches the preset time threshold.
  • Step S803 determine whether there are other idle frequency points at present, if there are other idle frequency points, execute step S804, otherwise, if there are no other idle frequency points, execute step S805.
  • Step S804 if there are other idle frequency points at present, determine whether the priority of this frequency point is higher than the priority of all other idle frequency points, if the priority of this frequency point is higher than the priority of all other idle frequency points, perform step S804 S805, otherwise, if at least one idle frequency point among other idle frequency points has a higher priority than the frequency point, return to step S802.
  • the priority of each frequency point can be set in advance.
  • Step S805 sending a wake-up signal physical frame at the frequency point, and ending the listening process of the frequency point in the transmission period.
  • the frequency point by listening to the frequency point for transmitting the wake-up signal before transmitting the wake-up signal, the frequency point can be selected to transmit the wake-up signal at the frequency point when the frequency point is idle, which can reduce the probability of the wake-up signal being interfered and improve the signal quality. Thereby improving the wake-up success rate and reducing the wake-up delay.
  • the multiple frequency points at which the transmitter 100 transmits the wake-up signal may not be adjacent.
  • FIG. 14 is a schematic diagram illustrating that multiple frequency points for transmitting wake-up signals are non-adjacent frequency points. Please refer to FIG. 14.
  • the five frequency points are 2450.05MHz, 2450.25MHz...2450.85MHz, the interval between each two frequency points is 200K Hz, and the bandwidth of the wake-up signal is 100K Hz.
  • multiple frequency points at which the transmitter 100 transmits the wake-up signal may also be adjacent.
  • FIG. 15 is a schematic diagram illustrating that multiple frequency points for transmitting wake-up signals are adjacent frequency points. Please refer to FIG. 15.
  • the nine frequency points are 2450.05MHz, 2450.15MHz, 2450.25MHz...2450.85MHz, the interval between each two frequency points is 100K Hz, and the bandwidth of the wake-up signal is 100K Hz.
  • the number of frequency points for transmitting the wake-up signal by the transmitter 100 may be greater than the number of operating frequency points for waking up the receiver 220, and the frequency point for transmitting the wake-up signal by the transmitter 100 is the same as the number of frequency points for waking up the receiver.
  • the operating frequencies of the 220 overlap at least partially.
  • the frequency points at which the transmitter 100 transmits the wake-up signal may cover all working frequency points for waking up the receiver 220 .
  • FIG. 16 is a schematic diagram showing a comparison between the frequencies for transmitting wake-up signals and the operating frequencies for wake-up receivers. Please refer to FIG. 16.
  • the frequencies for transmitting wake-up signals are 2450.05MHz, 2450.15MHz, 2450.25MHz...2450.85 MHz (a total of 9 frequency points)
  • the operating frequency points of the wake-up receiver 220 are 2450.05MHz, 2450.25MHz...2450.85MHz (a total of 5 frequency points)
  • the 9 frequency points for transmitting wake-up signals cover all of the wake-up receiver 5 working frequency points.
  • the minimum frequency point at which the transmitter 100 transmits the wake-up signal is smaller than the minimum operating frequency point of the wake-up receiver 220, and the maximum frequency point at which the transmitter 100 transmits the wake-up signal is greater than the maximum frequency point of the wake-up receiver 220. working frequency.
  • the frequency points for transmitting wake-up signals are 2450.05MHz, 2450.15MHz, 2450.25MHz...2450.85MHz (9 frequency points in total)
  • the operating frequency points of wake-up receiver 220 are 2450.25MHz, 2450.45MHz, 2450.65MHz (3 frequency points in total). Frequency).
  • the frequency range corresponding to the bandwidth for transmitting the wake-up signal can cover all operating frequency points of the wake-up receiver 220, and the minimum frequency of the frequency range corresponding to the bandwidth for transmitting the wake-up signal is smaller than the minimum frequency corresponding to the minimum operating frequency point of the wake-up receiver 220.
  • the minimum frequency of the receiving frequency range, the maximum frequency of the frequency range corresponding to the bandwidth for transmitting the wake-up signal is greater than the maximum frequency of the receiving frequency range corresponding to the maximum operating frequency point of the wake-up receiver 220 .
  • the frequency at which the transmitter 100 transmits the wake-up signal covers all the operating frequencies of the wake-up receiver 220, and the probability of the wake-up receiver 220 capturing the wake-up signal is greatly increased, which can reduce the wake-up delay and improve user experience.
  • the number of frequency points for transmitting the wake-up signal by the transmitter 100 may also be less than or equal to the number of operating frequency points for waking up the receiver 220 .
  • the operating frequency of the wake-up receiver 220 may cover part or all of the frequency points at which the transmitter 100 transmits the wake-up signal.
  • the second mode of transmitting the wake-up signal is a large-bandwidth transmission mode, that is, the wake-up signal is transmitted with a bandwidth greater than the required bandwidth of the wake-up signal.
  • FIG. 17 is a schematic diagram of a transmission signal of a transmitter and a reception signal of a wake-up receiver in a large-bandwidth transmission mode.
  • the transmitter 100 can transmit the wake-up signal through a bandwidth larger than the required bandwidth of the wake-up signal (assumed to be 100 KHz), for example, 1 MHz.
  • the wake-up receiver 220 receives the wake-up signal in the extremely narrow-band range through the extremely narrow-band band-pass filter 222a in the multi-channel parallel signal processing circuit of different operating frequencies, as long as the operating frequency of any extremely narrow-band band-pass filter 222a is within Within the bandwidth (1 MHz) of the wake-up signal transmitted by the transmitter 100 , the wake-up receiver 220 will successfully receive the wake-up signal with a bandwidth of 100 KHz, thereby successfully waking up the main transceiver 240 .
  • the wake-up receiver 220 includes 2 parallel signal processing circuits, and the receiving bandwidth of the wake-up receiver 220 is 100KHz , the working frequency of the first signal processing circuit is 2450.05MHz (the corresponding receiving frequency range is 2450MHz to 2450.1MHz), the working frequency of the second signal processing circuit is 2450.25MHz (the corresponding receiving frequency range is 2450.2MHz to 2450.3MHz).
  • the second signal processing circuit can still operate at 2450MHz to 2450.7MHz after temperature drift A wake-up signal is received within the frequency range of 2451MHz.
  • the frequency range of the wake-up signal transmitted by the transmitter 100 is 2450 MHz to 2450.1 MHz, neither the first signal processing circuit nor the second signal processing circuit can receive the wake-up signal after temperature drift.
  • the large bandwidth transmission method increases the probability that the receiving frequency range corresponding to the actual working frequency point of the signal processing circuit after temperature drift is covered by the transmission bandwidth, thereby increasing the probability of successfully receiving the wake-up signal, which can Effectively combat the effects of temperature drift.
  • Fig. 18 is a schematic diagram schematically illustrating the principle of combating temperature drift in a wide-bandwidth transmission mode.
  • the operating frequency of the wake-up receiver is set as frequency 3 during design, but in actual operation, the operating frequency of the wake-up receiver is changed to frequency 4 due to the influence of temperature drift.
  • the receiver can still be woken up at the actual operating frequency point (frequency point 4) after the temperature drift occurs. ) receives a wake-up signal, so that the main receiver can be successfully woken up in the presence of temperature drift.
  • the frequency range corresponding to the bandwidth for transmitting the wake-up signal may cover all receiving frequency ranges corresponding to all operating frequency points of the wake-up receiver 220, and the minimum frequency of the frequency range corresponding to the bandwidth for transmitting the wake-up signal is smaller than that of the wake-up receiver 220
  • the minimum frequency of the receiving frequency range corresponding to the minimum operating frequency point of , and the maximum frequency of the frequency range corresponding to the bandwidth for transmitting the wake-up signal is greater than the maximum frequency of the receiving frequency range corresponding to the maximum operating frequency point of the wake-up receiver 220 .
  • FIG. 19 is a schematic diagram showing bandwidth comparisons between the transmission signal of the transmitter and the reception signal of the wake-up receiver in the large-bandwidth transmission mode and the transmission signal of the transmitter and the reception signal of the wake-up receiver in the traditional solution.
  • the bandwidth of the signal transmitted by the transmitter in the large-bandwidth transmission mode is the same as that in the traditional solution, but the bandwidth of the signal received by the receiver in the large-bandwidth transmission mode is much smaller than that of the receiver in the traditional solution. Signal bandwidth.
  • the wake-up receiver in the large-bandwidth transmission mode of the embodiment of the present application can filter out more noise and interference, has a higher signal-to-interference ratio, and improves the anti-interference capability.
  • the transmitter 100 and the wake-up receiver 220 respectively store the physical frame structure information of the wake-up signal. In this way, the transmitter 100 determines the physical frame of the wake-up signal to be transmitted according to the stored physical frame structure information, and the wake-up receiver 220 identifies whether the filtered signal filtered by each signal processing circuit is a wake-up signal according to the stored physical frame structure information.
  • the wake-up signal can adopt a custom physical frame structure.
  • FIG. 20 is a schematic diagram of a physical frame structure of a wake-up signal.
  • the wake-up signal physical frame may include a header and a Media Access Control Address (Media Access Control Address, MAC) protocol data unit.
  • the wake-up signal physical frame header carries the wake-up receiver synchronization signal sequence
  • the MAC protocol data unit carries the wake-up receiver device ID.
  • the physical frame structure information of the wake-up signal stored in the transmitter 100 and the wake-up receiver 220 includes the content of the wake-up receiver synchronization signal sequence.
  • the wake-up receiver 220 stores its own wake-up receiver device ID, and each wake-up receiver device ID corresponds to the main transceiver 240 . In this way, the wake-up receiver 220 can identify whether the received signal is a wake-up signal according to the wake-up receiver synchronization signal sequence, and identify whether the main transceiver 240 in the second electronic device where the wake-up receiver 220 is located is a wake-up object according to the wake-up receiver device ID.
  • the wake-up receiver 220 extracts the first x bits of data from the physical frame corresponding to the received signal, compares the x-bit data with the wake-up receiver synchronization signal sequence stored in itself, and if the two match, the received signal is determined to be a wake-up signal .
  • the wake-up receiver 220 extracts the last y-bit data from the physical frame corresponding to the received signal, and compares the y-bit data with the wake-up receiver device ID stored in itself.
  • the main transceiver 240 in the second electronic device is a wake-up object.
  • matching may refer to: the correlation index value of the compared data of both parties is greater than or equal to a preset correlation threshold.
  • the correlation index value of the compared data of both parties can be obtained by using the correlation calculation method in the related art, and the embodiment of the present application does not limit the calculation method of the correlation index value, which will not be repeated here.
  • the wake-up signal may adopt a physical frame structure conforming to the 802.11 communication protocol.
  • FIG. 21 is another physical frame structure diagram of a wake-up signal exemplarily shown.
  • the wake-up signal physical frame is a wake-up signal physical frame that complies with the WiFi protocol, and the wake-up signal physical frame still includes a header and a MAC protocol data unit, but it is different from the wake-up signal physical frame structure shown in Figure 20 , the header of the wake-up signal physical frame in FIG. 21 carries the WiFi preamble and the wake-up receiver synchronization signal sequence.
  • the WiFi preamble may include a short training sequence (Legacy Short Training Field, L-STF), a long training sequence (Legacy Long Training Field, L-LTF), a signaling sequence (Legacy Signal Field, L-SIG) and Binary Phase Shift Keying Mark (Binary Phase Shift Keying Mark, BPSK-Mark).
  • the MAC protocol data unit of the wake-up signal physical frame in FIG. 21 carries the wake-up receiver device ID.
  • the physical frame structure information of the wake-up signal stored in the transmitter 100 and the wake-up receiver 220 includes the content of the WiFi preamble and the synchronization signal sequence of the wake-up receiver.
  • the wake-up receiver 220 stores its own wake-up receiver device ID, and each wake-up receiver device ID corresponds to the main transceiver 240 . In this way, the wake-up receiver 220 can identify whether the received signal is a wake-up signal according to the WiFi preamble and the wake-up receiver synchronization signal sequence, and identify whether the main transceiver 240 in the second electronic device where the wake-up receiver 220 is located is for the wakeup object.
  • the MAC protocol data unit m includes y bits, and x, y, and z are natural numbers.
  • the signal is a wake-up signal.
  • the wake-up receiver 220 extracts the last y-bit data from the physical frame corresponding to the received signal, and compares the y-bit data with the wake-up receiver device ID stored in itself.
  • the main transceiver 240 in the second electronic device is a wake-up object.
  • the physical frame structure of the wake-up signal shown in FIG. 21 is only a schematic example. In other embodiments of the present application, the physical frame structure of the wake-up signal that conforms to other communication protocols, such as the Bluetooth protocol and the D2D protocol, can also be used. , the embodiment of the present application does not limit the physical frame structure of the wake-up signal.
  • the wake-up receiver device ID in the wake-up signal transmitted by the transmitter 100 may correspond to a second electronic device, and at this time the wake-up signal is used to wake up a second electronic device.
  • the wake-up receiver device ID in the wake-up signal transmitted by the transmitter 100 may also correspond to a group of second electronic devices (all the second electronic devices in the same group correspond to the same wake-up receiver device ID), where The timed wake-up signal is used to wake up a group of second electronic devices.
  • the first electronic device is a WiFi router
  • the WiFi router includes the transmitter 100 shown in FIG. 4 .
  • the second electronic device is a mobile phone.
  • the mobile phone includes the receiver 200 shown in FIG. 4
  • the main transceiver 240 is a WiFi module in the mobile phone.
  • the WiFi module in the mobile phone is in a dormant state
  • the wake-up receiver in the mobile phone is in a working state.
  • the process of waking up the WiFi module in the mobile phone by the WiFi router may include the following steps:
  • the WiFi router receives the information A that needs to be forwarded to the application a on the mobile phone, and triggers the wake-up process;
  • the WiFi router takes T as the period, and in each period T, transmits wake-up signals on s frequency points in time division, s is a natural number, the wake-up signal includes wake-up sequence 1, and wake-up sequence 1 includes device ID1;
  • the wake-up signal is output to each signal processing circuit 222 as an input signal; the extremely narrow band-pass filter 222a in each signal processing circuit 222 processes the input signal according to its own operating frequency. Filter to obtain the filtered signal;
  • the envelope detector 222b extracts the amplitude envelope of the filtered signal output by the extremely narrowband bandpass filter in this signal processing circuit to obtain the baseband pulse signal; then, the baseband pulse signal is respectively output to n-way comparator 222c and correlator 222d;
  • the comparator 222c compares the voltage of the baseband pulse signal output by the envelope detector 222b with its own reference voltage to obtain a 0/1 level sequence, and the 0/1 level sequence output to the correlator;
  • the correlator 222d compares the 0/1 level sequence output by the comparator 222c with the wake-up sequence 2 stored locally in the mobile phone, and if the correlation between the 0/1 level sequence and the wake-up sequence 2 is greater than the preset Correlator 222d outputs a signal indicating that a wake-up signal has been received, such as a digital signal 1, otherwise the output indicates that a wake-up signal has not been received, such as a digital signal 0;
  • the logical OR operation circuit 222e located in each signal processing circuit 222 performs a logical OR operation on the output results of all correlators 222d in the signal processing circuit 222 of the road to obtain the output signal (0 or 1) of the signal processing circuit 222 of the road ;
  • Logical OR operation circuit 223 carries out logical OR operation to the output signals of all signal processing circuits 222 to obtain output signal 0 or 1, if output signal 0, then output the signal indicating that the wake-up signal has not been received to wake-up signal generator 224, wake-up signal Generator 224 keeps original state; If output signal 1, then output and indicate that the signal of receiving wake-up signal is given to wake-up signal generator 224, and wake-up signal generator 224 generates the signal of indicating to wake up the WiFi module in the mobile phone to controller 230, and controller 230 controls the WiFi module in the mobile phone to enter the working state through the control command, and controls the wake-up receiver to enter the dormant state, and notifies the WiFi router that the WiFi module has been awakened;
  • the WiFi router sends the information A to the mobile phone, and the WiFi module on the mobile phone receives the information A, and sends the information A to the application a on the mobile phone;
  • the WiFi router does not send any communication data to the WiFi module on the mobile phone, then the WiFi module on the mobile phone waits for a preset period of time and then automatically enters the dormant state, and notifies the controller 230 on the mobile phone, and the controller 230 is controlled by a control command.
  • the wake-up sequence 2 stored in the mobile phone includes the device ID2 of the mobile phone. If the wake-up object of the WiFi router is a mobile phone, the device ID1 in the wake-up sequence 1 included in the wake-up signal transmitted by the WiFi router is exactly the same as the device ID2 in the wake-up sequence 2 . If the wake-up receiver 220 in the mobile phone accurately receives the wake-up signal transmitted by the WiFi router, the device ID in the 0/1 level sequence output by the comparator 222c in the mobile phone should be completely consistent with the device ID1 in the wake-up sequence 1.
  • the device ID in the 0/1 level sequence output by the comparator 222c in the mobile phone and the device ID1 in the wake-up sequence 1 may not be completely Therefore, the device ID in the 0/1 level sequence output by the comparator 222c in the mobile phone may not be completely consistent with the device ID2 in the wake-up sequence 2, as long as the device in the 0/1 level sequence output by the comparator 222c in the mobile phone If the correlation index value between the ID and the device ID2 in the wake-up sequence 2 is greater than the preset correlation threshold, it is considered that the wake-up signal transmitted by the WiFi router is sent for the mobile phone.
  • the electronic device includes hardware and/or software modules corresponding to each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions in combination with the embodiments for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.
  • FIG. 22 is a schematic block diagram of an apparatus 900 according to an embodiment of the present application.
  • the device 900 may include: a processor 901 , a transceiver/transceiving pin 902 , and optionally a memory 903 .
  • bus 904 includes a power bus, a control bus, and a status signal bus in addition to a data bus.
  • the various buses are referred to as bus 904 in the figure.
  • the memory 903 may be used for the instructions in the foregoing method embodiments.
  • the processor 901 can be used to execute instructions in the memory 903, and control the receiving pin to receive signals, and control the sending pin to send signals.
  • the apparatus 900 may be the electronic device or the chip of the electronic device in the foregoing method embodiments.
  • the electronic device, computer storage medium, computer program product or chip provided in this embodiment is all used to execute the corresponding method provided above, therefore, the beneficial effects it can achieve can refer to the corresponding method provided above The beneficial effects in the method will not be repeated here.
  • the disclosed devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of modules or units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be combined or It may be integrated into another device, or some features may be omitted, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • a unit described as a separate component may or may not be physically separated, and a component shown as a unit may be one physical unit or multiple physical units, which may be located in one place or distributed to multiple different places. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.
  • an integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a readable storage medium.
  • the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the software product is stored in a storage medium Among them, several instructions are included to make a device (which may be a single-chip microcomputer, a chip, etc.) or a processor (processor) execute all or part of the steps of the methods in various embodiments of the present application.
  • the aforementioned storage medium includes: various media that can store program codes such as U disk, mobile hard disk, read only memory (ROM), random access memory (random access memory, RAM), magnetic disk or optical disk.

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Abstract

本申请实施例提供了一种唤醒方法。该唤醒方法包括：第一信号处理电路在第一频点上进行监听；第二信号处理电路在第二频点上进行监听；第二频点与第一频点不相同；第二信号处理电路在第二频点上接收到唤醒信号；唤醒信号的带宽小于第一值；唤醒信号是第一电子设备在多个发射频点上或在大于第二值的带宽上发射的；第二值大于第一值。并且，第一信号处理电路在第二频点上进行监听；第二信号处理电路在第三频点上进行监听；第三频点与第一频点、第二频点都不相同；此时，第一信号处理电路在第二频点上接收到唤醒信号。这样，通过在多个频点监听唤醒信号，增加了成功捕获唤醒信号的概率，减小了唤醒时延。

Description

唤醒方法、装置及电子设备
本申请要求于2021年10月21日提交中国专利局、申请号为202111228030.4、申请名称为“唤醒方法、装置及电子设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及终端设备领域，尤其涉及一种唤醒方法、装置及电子设备。
背景技术
无线电子设备之间建立连接，首先需要发端发射一组特定的唤醒信号，被唤醒设备接收到唤醒信号并正确解调，实现有效唤醒并开始建立连接。无线的电子设备中的传统接收机架构包含低噪声放大器、混频器、自动增益控制器等高功耗器件，如果在等待唤醒阶段保持常开会极大增加接收机的待机功耗。相关技术通过降低接收机的占空比降低接收机的待机功耗，即接收机周期性的在工作状态与休眠状态之间切换。这种降低占空比的方案虽然能有效降低接收机的待机功耗，但同时也降低了接收机被唤醒的概率，增加了唤醒时延。
发明内容
为了解决上述技术问题，本申请提供一种唤醒方法、装置及电子设备，可在多个频点监听极窄带宽的唤醒信号，增加了成功捕获唤醒信号的概率，减小了唤醒时延。
第一方面，本申请提供一种唤醒方法。该方法包括：第一信号处理电路在第一频点上进行监听；第二信号处理电路在第二频点上进行监听；第二频点与第一频点不相同；第二信号处理电路在第二频点上接收到唤醒信号；该唤醒信号的带宽小于第一值；唤醒信号是第一电子设备在多个发射频点上发射的，或者，唤醒信号是第一电子设备在大于第二值的带宽上发射的；第二值大于第一值。并且，当发生温漂时，第一信号处理电路在第二频点上进行监听；第二信号处理电路在第三频点上进行监听；第三频点与第一频点、第二频点都不相同；此时，第一信号处理电路在第二频点上接收到唤醒信号。这样，一方面，通过在多个频点监听唤醒信号，增加了成功捕获唤醒信号的概率，从而增大了电子设备被成功唤醒的概率，减小了唤醒时延。另一方面，通过在多个频点进行监听能够在发生温漂时仍然成功捕获唤醒信号，有效克服了温漂的影响。
示例性的，唤醒方法还可以包括：第三信号处理电路在第三频点上进行监听。发生温漂后，第三信号处理电路在第四频点上进行监听。第四频点与第一频点、第二频点、第三频点均不相同。本申请中，可以采用多个信号处理电路在多个不同频点进行监听，信号处理电路的数量越多，成功捕获唤醒信号的概率越大，唤醒时延越小。
根据第一方面，第一信号处理电路输出第一逻辑值，第一逻辑值用于指示第一信号处理电路接收到唤醒信号。并且，第二信号处理电路输出第二逻辑值，第二逻辑值用于指示第二信号处理电路未接收到唤醒信号。第一逻辑或运算电路根据第一逻辑值和第二逻辑值，确定接收到唤醒信号。这样，当第一信号处理电路和第二信号处理电路的任一个接收到唤醒信号，即可确定接收到唤醒信号，提高了接收灵敏度。当采用多个信号处理电路时， 每个信号处理电路如果接收到唤醒信号，可以输出逻辑值1，如果未接收到唤醒信号，可以输出逻辑值0，第一逻辑或运算电路将所有信号处理电路输出的逻辑值相加，如果得到逻辑值1，确定接收到唤醒信号。这样，只要至少一路信号处理电路接收到唤醒信号，即可确定接收到唤醒信号。
根据第一方面，第一信号处理电路包括极窄带带通滤波器、包络检波器、比较器和相关器，极窄带带通滤波器的输入端与天线耦合，包络检波器的输入端与极窄带带通滤波器的输出端耦合，比较器的输入端与包络检波器的输出端耦合，相关器的输入端与比较器的输出端耦合。这样，第一信号处理电路在第二频点上接收到唤醒信号，可以包括：极窄带带通滤波器对在第二频点上监听到的第一信号进行极窄带带通滤波，得到极窄带宽的滤波信号；包络检波器提取滤波信号的幅度包络，得到基带脉冲信号；比较器将基带脉冲信号的电压与参考电压进行比较，得到第一数字信号序列；相关器获取第一数字信号序列与预设的唤醒序列的第一相关性指标值，并将第一相关性指标值与预设的相关性阈值进行比较，得到相关性比较结果，当相关性比较结果指示第一相关性指标值大于相关性阈值，第一信号为唤醒信号。这样，采用极窄带带宽上进行滤波，能够滤除更多的噪声和干扰，提高抗干扰能力。
根据第一方面，比较器包括第一比较器和第二比较器，第一比较器的输入端和第二比较器的输入端分别与包络检波器的输出端耦合；相关器包括第一相关器和第二相关器，第一相关器的输入端与第一比较器的输出端耦合，第二相关器的输入端与第二比较器的输出端耦合；第一信号处理电路还包括第二逻辑或运算电路，第一相关器的输出端和第二相关器的输出端分别与第二逻辑或运算电路的输入端耦合。这样，比较器将基带脉冲信号的电压与参考电压进行比较，得到第一数字信号序列，包括：第一比较器将基带脉冲信号的电压与第一参考电压进行比较，得到第一备选数字信号序列；第二比较器将基带脉冲信号的电压与第二参考电压进行比较，得到第二备选数字信号序列；第二参考电压与第一参考电压不相同。这样，相关器获取第一数字信号序列与预设的唤醒序列的第一相关性指标值，并将第一相关性指标值与预设的相关性阈值进行比较，得到相关性比较结果，当相关性比较结果指示第一相关性指标值大于相关性阈值，第一信号为唤醒信号，包括：第一相关器获取第一备选数字信号序列与预设的唤醒序列的第一相关性指标值的第一备选值，并将第一相关性指标值的第一备选值与预设的相关性阈值进行比较，得到第一相关性比较结果；第二相关器获取第二备选数字信号序列与预设的唤醒序列的第一相关性指标值的第二备选值，并将第一相关性指标值的第二备选值与预设的相关性阈值进行比较，得到第二相关性比较结果；第二逻辑或运算电路对第一相关性比较结果和第二相关性比较结果进行逻辑或运算，得到第一逻辑或运算结果；当第一逻辑或运算结果指示第一相关性指标值的第一备选值和第一相关性指标值的第二备选值中的至少一个大于预设的相关性阈值，第一信号处理电路在第二频点上接收到唤醒信号。这样，每一路信号处理电路中，采用多个不同参考电压的比较器分别与基带脉冲信号的电压进行比较，不同参考电压对应不同的距离，使得两个无线电子设备之间的距离不同时，至少有一路比较器能够输出准确的唤醒序列，从而成功唤醒电子设备中的主收发机，提高了灵敏度。
示例性的，比较器可以为一组比较器，该组比较器的数量可以大于2。其中，该组比较器中的每个比较器的参考电压与预设的距离相适应，不同比较器的参考电压不同。这样， 当两个无线电子设备之间的距离不同时，都有具有与该距离对应的参考电压的比较器，能够准确获取唤醒信号中的唤醒序列，从而成功进行唤醒。可见，采用多个不同参考电压的比较器能够显著提高灵敏度。
根据第一方面，第一信号处理电路包括极窄带带通滤波器、包络检波器、包括积分电路的比较器、以及相关器，极窄带带通滤波器的输入端与天线耦合，包络检波器的输入端与极窄带带通滤波器的输出端耦合，包括积分电路的比较器的输入端与包络检波器的输出端耦合，相关器的输入端与包括积分电路的比较器的输出端耦合。这样，第一信号处理电路在第二频点上接收到唤醒信号，包括：极窄带带通滤波器对在第二频点上监听到的第一信号进行极窄带带通滤波，得到极窄带宽的滤波信号；包络检波器提取滤波信号的幅度包络，得到基带脉冲信号；包括积分器电路的比较器将基带脉冲信号转换为单脉冲信号，并将单脉冲信号的电压与参考电压进行比较，得到第二数字信号序列；相关器获取第二数字信号序列与预设的唤醒序列的第二相关性指标值，并将第二相关性指标值与预设的相关性阈值进行比较，得到相关性比较结果；当相关性比较结果指示第二相关性指标值大于预设的相关性阈值，第一信号为唤醒信号。积分电路能够对基带脉冲信号的电压进行累积形成对应的单脉冲信号，这样，能够提高比较器输出的数字信号序列的准确性，提高整体灵敏度。
根据第一方面，包括积分电路的比较器包括第三比较器和第四比较器，第三比较器和第四比较器中均包括积分电路，第三比较器的输入端和第四比较器的输入端分别与包络检波器的输出端耦合；相关器包括第三相关器和第四相关器，第三相关器的输入端与第三比较器的输出端耦合，第四相关器的输入端与第四比较器的输出端耦合；第一信号处理电路还包括第二逻辑或运算电路，第三相关器的输出端和第四相关器的输出端分别与第二逻辑或运算电路的输入端耦合。这样，包括积分器电路的比较器将基带脉冲信号转换为单脉冲信号，并将单脉冲信号的电压与参考电压进行比较，得到第二数字信号序列，包括：第三比较器将基带脉冲信号转换为单脉冲信号，并单脉冲信号的电压与第三参考电压进行比较，得到第三备选数字信号序列；第四比较器将基带脉冲信号转换为单脉冲信号，并单脉冲信号的电压与第四参考电压进行比较，得到第四备选数字信号序列；第四参考电压与第三参考电压不相同。这样，相关器获取第二数字信号序列与预设的唤醒序列的第二相关性指标值，并将第二相关性指标值与预设的相关性阈值进行比较，得到相关性比较结果；当相关性比较结果指示第二相关性指标值大于预设的相关性阈值，第一信号为唤醒信号，包括：第三相关器获取第三备选数字信号序列与预设的唤醒序列的第二相关性指标值的第一备选值，并将第二相关性指标值的第一备选值与预设的相关性阈值进行比较，得到第三相关性比较结果；第四相关器获取第四备选数字信号序列与预设的唤醒序列的第二相关性指标值的第二备选值，并将第二相关性指标值的第二备选值与预设的相关性阈值进行比较，得到第四相关性比较结果；第二逻辑或运算电路对第三相关性比较结果和第四相关性比较结果进行逻辑或运算，得到第二逻辑或运算结果；当第二逻辑或运算结果指示第二相关性指标值的第一备选值和第二相关性指标值的第二备选值中的至少一个大于预设的相关性阈值，第一信号为唤醒信号。这样，每一路信号处理电路中，采用多个不同参考电压的比较器分别与基带脉冲信号的电压进行比较，不同参考电压对应不同的距离，使得两个无线电子设备之间的距离不同时，至少有一路比较器能够输出准确的唤醒序列，从而成功唤醒 电子设备中的主收发机，提高了灵敏度。
根据第一方面，第一频点与第二频点为相邻频点。这样，当发生温漂且温漂较小时，增大了信号处理电路在相邻频点接收到唤醒信号的概率，从而增大了成功唤醒的概率。
根据第一方面，第一频点与第二频点为非相邻频点。这样，当发生温漂且温漂较大时，增大了信号处理电路在非相邻频点接收到唤醒信号的概率，从而增大了成功唤醒的概率。
根据第一方面，多个发射频点包括第一频点和第二频点中的至少一个频点。这样，能够增大接收到唤醒信号的概率，从而增大成功唤醒的概率。
根据第一方面，第一频点和第二频点中的至少一个频点处于第一电子设备发射唤醒信号的带宽内。这样，能够增大接收到唤醒信号的概率，从而增大成功唤醒的概率。
第二方面，本申请提供一种唤醒装置。该唤醒装置包括：第一信号处理电路，第一信号处理电路耦合至天线，用于在第一频点上进行监听；第二信号处理电路，第二信号处理电路耦合至天线，用于在第二频点上进行监听；第二频点与第一频点不相同；当没有发生温漂时，第二信号处理电路还用于在第二频点上接收到唤醒信号；唤醒信号的带宽小于第一值；唤醒信号是第一电子设备在多个发射频点上发射的或在大于第二值的带宽上发射的；第二值大于第一值。当发生温漂时，第一信号处理电路还用于在第二频点上进行监听；第二信号处理电路器还用于在第三频点上进行监听；第三频点与第一频点、第二频点都不相同；第一信号处理电路还用于在第二频点上接收到唤醒信号。这样，一方面，通过在多个频点监听唤醒信号，增加了成功捕获唤醒信号的概率，从而增大了电子设备被成功唤醒的概率，减小了唤醒时延。另一方面，通过在多个频点进行监听能够在发生温漂时仍然成功捕获唤醒信号，有效克服了温漂的影响。
示例性的，唤醒装置还可以包括：第三信号处理电路，第三信号处理电路耦合至天线，用于在第三频点上进行监听。发生温漂后，第三信号处理电路还用于在第四频点上进行监听。第四频点与第一频点、第二频点、第三频点均不相同。本申请中，可以采用多个信号处理电路在多个不同频点进行监听，信号处理电路的数量越多，成功捕获唤醒信号的概率越大，唤醒时延越小。
根据第二方面，第一信号处理电路，还用于输出第一逻辑值，第一逻辑值用于指示第一信号处理电路接收到唤醒信号；第二信号处理电路，还用于输出第二逻辑值，第二逻辑值用于指示第二信号处理电路未接收到唤醒信号；装置还包括：第一逻辑或运算电路，第一逻辑或运算电路的输入端分别与第一信号处理电路的输出端和第二信号处理电路的输出端耦合，第一逻辑或运算电路用于根据第一逻辑值和第二逻辑值，确定接收到唤醒信号。这样，当第一信号处理电路和第二信号处理电路的任一个接收到唤醒信号，即可确定接收到唤醒信号，提高了接收灵敏度。
根据第二方面，第一信号处理电路包括：极窄带带通滤波器，极窄带带通滤波器的输入端耦合至天线，用于对在第二频点上监听到的第一信号进行极窄带带通滤波，得到极窄带宽的滤波信号；包络检波器，包络检波器的输入端与极窄带带通滤波器的输出端耦合，用于提取滤波信号的幅度包络，得到基带脉冲信号；比较器，比较器的输入端与包络检波器的输出端耦合，用于将基带脉冲信号的电压与参考电压进行比较，得到第一数字信号序列；相关器，相关器的输入端与比较器的输出端耦合，用于获取第一数字信号序列与预设的唤醒序列的第一相关性指标值，并将第一相关性指标值与预设的相关性阈值进行比较， 得到相关性比较结果，当相关性比较结果指示第一相关性指标值大于相关性阈值，第一信号为唤醒信号。这样，采用极窄带带宽上进行滤波，能够滤除更多的噪声和干扰，提高抗干扰能力。
根据第二方面，比较器包括：第一比较器，第一比较器的输入端耦合至包络检波器的输出端，用于将基带脉冲信号的电压与第一参考电压进行比较，得到第一备选数字信号序列；第二比较器，第二比较器的输入端耦合至包络检波器的输出端，用于将基带脉冲信号的电压与第二参考电压进行比较，得到第二备选数字信号序列；第二参考电压与第一参考电压不相同。其中，相关器包括：第一相关器，第一相关器的输入端耦合至第一比较器的输出端，用于获取第一备选数字信号序列与预设的唤醒序列的第一相关性指标值的第一备选值，并将第一相关性指标值的第一备选值与预设的相关性阈值进行比较，得到第一相关性比较结果；第二相关器，第二相关器的输入端耦合至第二比较器的输出端，用于获取第二备选数字信号序列与预设的唤醒序列的第一相关性指标值的第二备选值，并将第一相关性指标值的第二备选值与预设的相关性阈值进行比较，得到第二相关性比较结果。唤醒装置还包括第二逻辑或运算电路，第二逻辑或运算电路的输入端分别与第一相关器的输出端和第二相关器的输出端耦合，用于对第一相关性比较结果和第二相关性比较结果进行逻辑或运算，得到第一逻辑或运算结果；当第一逻辑或运算结果指示第一相关性指标值的第一备选值和第一相关性指标值的第二备选值中的至少一个大于预设的相关性阈值，第一信号为唤醒信号。这样，每一路信号处理电路中，采用多个不同参考电压的比较器分别与基带脉冲信号的电压进行比较，不同参考电压对应不同的距离，使得两个无线电子设备之间的距离不同时，至少有一路比较器能够输出准确的唤醒序列，从而成功唤醒电子设备中的主收发机，提高了灵敏度。
根据第二方面，第一信号处理电路包括：极窄带带通滤波器，极窄带带通滤波器的输入端耦合至天线，用于对在第二频点上监听到的第一信号进行极窄带带通滤波，得到极窄带宽的滤波信号；包络检波器，包络检波器的输入端耦合至极窄带带通滤波器的输出端，用于检测滤波信号的幅度包络，得到基带脉冲信号；包括积分器电路的比较器，包括积分器电路的比较器的输入端与包络检波器的输出端耦合，用于将基带脉冲信号转换为单脉冲信号，并将单脉冲信号的电压与参考电压进行比较，得到第二数字信号序列；相关器，相关器的输入端与包括积分器电路的比较器的输出端耦合，用于获取第二数字信号序列与预设的唤醒序列的第二相关性指标值，并将第二相关性指标值与预设的相关性阈值进行比较，得到相关性比较结果；当相关性比较结果指示第二相关性指标值大于预设的相关性阈值，第一信号为唤醒信号。积分电路能够对基带脉冲信号的电压进行累积形成对应的单脉冲信号，这样，能够提高比较器输出的数字信号序列的准确性，提高整体灵敏度。
根据第二方面，包括积分电路的比较器包括：第三比较器，第三比较器中包括积分电路，第三比较器的输入端与包络检波器的输出端耦合，用于将基带脉冲信号转换为单脉冲信号，并单脉冲信号的电压与第三参考电压进行比较，得到第三备选数字信号序列；第四比较器，第四比较器中包括积分电路，第四比较器的输入端与包络检波器的输出端耦合，用于将基带脉冲信号转换为单脉冲信号，并单脉冲信号的电压与第四参考电压进行比较，得到第四备选数字信号序列；第四参考电压与第三参考电压不相同。其中，相关器包括：第三相关器，第三相关器的输入端与第三比较器的输出端耦合，用于获取第三备选数字信 号序列与预设的唤醒序列的第二相关性指标值的第一备选值，并将第二相关性指标值的第一备选值与预设的相关性阈值进行比较，得到第三相关性比较结果；第四相关器，第四相关器的输入端与第四比较器的输出端耦合，用于获取第四备选数字信号序列与预设的唤醒序列的第二相关性指标值的第二备选值，并将第二相关性指标值的第二备选值与预设的相关性阈值进行比较，得到第四相关性比较结果。并且，唤醒装置还包括第二逻辑或运算电路，第二逻辑或运算电路的输入端分别与第三相关器的输出端和第四相关器的输出端耦合，用于对第三相关性比较结果和第四相关性比较结果进行逻辑或运算，得到第二逻辑或运算结果；当第二逻辑或运算结果指示第二相关性指标值的第一备选值和第二相关性指标值的第二备选值中的至少一个大于预设的相关性阈值，第一信号为唤醒信号。这样，每一路信号处理电路中，采用多个不同参考电压的比较器分别与基带脉冲信号的电压进行比较，不同参考电压对应不同的距离，使得两个无线电子设备之间的距离不同时，至少有一路比较器能够输出准确的唤醒序列，从而成功唤醒电子设备中的主收发机，提高了灵敏度。
根据第二方面，第一频点与第二频点为相邻频点。这样，当发生温漂且温漂较小时，增大了信号处理电路在相邻频点接收到唤醒信号的概率，从而增大了成功唤醒的概率。
根据第二方面，第一频点与第二频点为非相邻频点。这样，当发生温漂且温漂较大时，增大了信号处理电路在非相邻频点接收到唤醒信号的概率，从而增大了成功唤醒的概率。
根据第二方面，多个发射频点包括第一频点和第二频点中的至少一个频点。这样，能够增大接收到唤醒信号的概率，从而增大成功唤醒的概率。
根据第二方面，第一频点和第二频点中的至少一个频点处于第一电子设备发射唤醒信号的带宽内。这样，能够增大接收到唤醒信号的概率，从而增大成功唤醒的概率。
第三方面，本申请提供一种电子设备。该电子设备包括存储器和处理器，存储器与处理器耦合；存储器存储有程序指令，当程序指令由处理器执行时，使得电子设备执行第一方面或第一方面的任意可能的实现方式中的唤醒方法。
第四方面，本申请提供一种计算机可读存储介质。该计算机可读存储介质包括计算机程序，当计算机程序在电子设备上运行时，使得电子设备执行第一方面或第一方面的任意可能的实现方式中的唤醒方法。
附图说明
图1为示例性示出的采用低占空比的方案的发送时序和接收时序示意图；
图2为示例性示出的唤醒方法的应用场景示意图；
图3为示例性示出的唤醒方法流程图；
图4为示例性示出的发射机和接收机的结构示意图；
图5为示例性示出的图4中唤醒接收机220的结构示意图；
图6为示例性示出的图5中信号处理电路222和逻辑或运算电路223的信号传输关系示意图；
图7为示例性示出的图5中信号处理电路222的结构示意图；
图8为示例性示出的比较器和相关器的信号传输关系示意图；
图9为示例性示出的多频点发射方式中发射机的发射信号和唤醒接收机的接收信号示意图；
图10为示例性示出的多频点发射方式中发射机的发射信号和唤醒接收机的接收信号与传统方案中发射机的发射信号和唤醒接收机的接收信号的带宽对比示意图；
图11为示例性示出的发射机100发射唤醒信号的时序图；
图12为示例性示出的多频点发射方式对抗温漂的原理示意图；
图13为示例性示出的发射唤醒信号的频点的侦听流程图；
图14为示例性示出的发射唤醒信号的多个频点为非相邻频点的示意图；
图15为示例性示出的发射唤醒信号的多个频点为相邻频点的示意图；
图16为示例性示出的发射唤醒信号的频点与唤醒接收机工作频点的对比示意图；
图17为示例性示出的大带宽发射方式中发射机的发射信号和唤醒接收机的接收信号示意图；
图18为示例性示出的大带宽发射方式对抗温漂的原理示意图；
图19为示例性示出的大带宽发射方式中发射机的发射信号和唤醒接收机的接收信号与传统方案中发射机的发射信号和唤醒接收机的接收信号的带宽对比示意图；
图20为示例性示出的唤醒信号的一种物理帧结构图；
图21为示例性示出的唤醒信号的另一种物理帧结构图；
图22为示例性示出的本申请实施例的一种装置900的示意性框图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。
本申请实施例的说明书和权利要求书中的术语“第一”和“第二”等是用于区别不同的对象，而不是用于描述对象的特定顺序。例如，第一目标对象和第二目标对象等是用于区别不同的目标对象，而不是用于描述目标对象的特定顺序。
在本申请实施例中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请实施例中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念。
在本申请实施例的描述中，除非另有说明，“多个”的含义是指两个或两个以上。例如，多个处理单元是指两个或两个以上的处理单元；多个系统是指两个或两个以上的系统。
本申请实施例中的唤醒方法可以应用于第一电子设备与一个或多个第二电子设备之间的唤醒场景。其中，第一电子设备例如可以是手机、平板电脑、智能手表、Wi-Fi路由器、传感器网络信息采集装置、中心节点、无人机、基站(Base Station)等电子设备。第二电子设备例如可以是手机、平板电脑、Wi-Fi路由器、电子标签、无线耳机、智能电表、智能手表等电子设备。
相关技术中，可以通过降低电子设备中接收机的占空比来降低电子设备的待机功耗，在该相关技术中，接收机周期性的在工作状态与休眠状态之间切换。其中，占空比定义为工作时间占总时间的比例。图1为示例性示出的采用低占空比的方案的发送时序和接收时序示意图。请参见图1，发射方每隔20ms(毫秒)发射一次信号，其中，发射方在每个周期(20ms)的工作时长为3ms。接收方每隔600ms启动一次，每次工作时长为60ms，占空比＝60/600＝0.1。该接收方的最短时延为3ms，但最长时延可达543ms。
可见，降低占空比虽然能有效降低接收机待机功耗，但同时也降低了接收机被唤醒的概率，增加了唤醒时延。
图2为示例性示出的唤醒方法的应用场景示意图。请参见图2，手机与电子标签、智能手表、无线耳机、WiFi路由器或一组智能电表之间，在建立连接前，可以应用本申请实施例的唤醒方法唤醒电子标签、智能手表、无线耳机、Wi-Fi路由器或一组智能电表。唤醒后，手机可以与电子标签、智能手表、无线耳机、WiFi路由器或一组智能电表建立基于通信协议例如Wi-Fi协议、蓝牙(Blue Tooth,BT)协议、设备到设备(Device-to-Device，D2D)协议、蜂窝移动通信协议等的连接，从而进行数据通信。
需要说明的是，图1中所示的应用场景中的电子设备的类型、数量等仅为示意性举例，本申请不做限定。
本申请实施例中，唤醒方法应用于包括第一电子设备和第二电子设备的唤醒系统。其中，第一电子设备为唤醒设备，第二电子设备为被唤醒设备。第二电子设备中的主收发机用于与第一电子设备进行数据通信，但该主收发机通常功耗较高，在第二电子设备待机过程中，如果保持主收发机常开将会极大增加第二电子设备的待机功耗。为了减小第二电子设备的待机功耗，本申请实施例针对第二电子设备提出了一种新的接收机架构，在此基础上提出了本申请实施例的唤醒方法。
下面结合附图，对与本申请实施例的唤醒方法对应的接收机架构以及唤醒方法的原理进行说明。
图3为示例性示出的唤醒方法流程图。该唤醒方法可以由后续图4中的唤醒接收机220执行。请参见图3，本申请实施例中，唤醒方法可以包括：
步骤S301，第一信号处理电路在第一频点上进行监听；
步骤S302，第二信号处理电路在第二频点上进行监听；第二频点与第一频点不相同；
步骤S303，第二信号处理电路在第二频点上接收到唤醒信号；唤醒信号的带宽小于第一值；唤醒信号是第一电子设备在多个发射频点上发射或在大于第二值的带宽上发射的；第二值大于第一值；
步骤S304，第一信号处理电路在第二频点上进行监听；
步骤S305，第二信号处理电路在第三频点上进行监听；第三频点与第一频点、第二频点都不相同；
步骤S306，第一信号处理电路在第二频点上接收到唤醒信号。
其中，第一信号处理电路、第二信号处理电路均为后续图4中唤醒接收机中的电路。
以下结合接收机以及唤醒接收机的内部结构，对本申请实施例的唤醒方法作进一步详细说明。
图4为示例性示出的发射机和接收机的结构示意图。请参见图4，本申请实施例中的 第一电子设备包括图4中的发射机100，第二电子设备包括图4中的接收机200。其中，发射机100可以兼容现有蜂窝、WiFi、蓝牙等通信系统的发射机，与主收发机进行基于传统协议的数据通信。
请继续参见图4，接收机200可以包括开关210、唤醒接收机220、控制器230和主收发机240。开关210分别与接收机天线、唤醒接收机220、控制器230和主收发机240耦合。唤醒接收机220分别与开关210和控制器230耦合。控制器230分别与唤醒接收机220和主收发机240耦合。主收发机240分别与开关210和控制器230耦合。在一个示例中，接收机200中可以包括一个唤醒接收机220。在另一个示例中，接收机200中可以包括一组唤醒接收机220。
接收机200的天线(为描述方便，以下称为接收天线)接收发射机100的天线(为描述方便，以下称为发射天线)发射的射频信号，该射频信号包括唤醒信号和数据信号，其中，唤醒信号用于唤醒接收机200中的主收发机240，即将主收发机240从休眠状态切换到工作状态；数据信号用于第一电子设备与第二电子设备进行数据通信。
图4所示接收机200的工作原理为：在接收机200所在的第二电子设备待机过程中，主收发机240处于休眠状态，唤醒接收机220处于工作状态；唤醒接收机220如果接收到第一电子设备的发射机100发射的唤醒信号，唤醒接收机220发送指示唤醒主收发机240的信号给控制器230，然后，唤醒接收机220进入休眠状态。控制器230在接收到指示唤醒主收发机240的信号后，可以控制主收发机240从休眠状态切换到工作状态。
在另一个示例中，控制器230在接收到指示唤醒主收发机240的信号后，也可以控制主收发机240继续保持在休眠状态。或者，控制器230在接收到指示唤醒主收发机240的信号后，还可以控制延迟一段时间后再将主收发机240从休眠状态切换到工作状态。
在符合该工作原理的前提下，图4所示接收机200中的各组成部分(开关210、唤醒接收机220、控制器230、主收发机240)之间可以采用不同的耦合关系。本申请实施例不对图4所示接收机200中的各组成部分之间的耦合关系进行限制。
在接收机200采用不同的耦合关系时，接收机200的工作过程可以是不同的，但接收机200的工作原理均与前述的工作原理相同。
下面通过接收机200中的各组成部分的一个示例性的耦合关系，提供一种基于该示例性耦合关系的接收机200的工作过程。
在一个示例中，图4中，开关210可以包括两个输入端和两个输出端。开关210的一个输入端(为描述方便，本文中称为第一输入端)与接收机天线耦合，另一个输入端(为描述方便，本文中称为第二输入端)与控制器230耦合。开关210的一个输出端(为描述方便，本文中称为第一输出端)与唤醒接收机220耦合，另一个输出端(为描述方便，本文中称为第二输出端)与主收发机240耦合。开关210在控制器230的控制信号的作用下，使第一输入端与第一输出端耦合，或者使第一输入端与第二输出端耦合。
在一个示例中，图4中，唤醒接收机220可以包括两个输入端和一个输出端。唤醒接收机220分别与开关210和控制器230相连。唤醒接收机220处于工作状态时，唤醒接收机220的一个输入端(为描述方便，本文中称为唤醒接收机220的第一输入端)与开关210耦合，唤醒接收机220的输出端与控制器230耦合。唤醒接收机220处于休眠状态时，唤醒接收机220的另一个输入端(为描述方便，本文中称为唤醒接收机220的第二输入端) 与控制器230耦合。
在一个示例中，图4中，控制器230可以包括两个输入端和三个输出端。控制器230的一个输入端(为描述方便，本文中称为控制器230的第一输入端)与唤醒接收机220耦合，另一个输入端(为描述方便，本文中称为控制器230的第二输入端)与主收发机240耦合。控制器230的一个输出端(为描述方便，本文中称为控制器230的第一输出端)与开关210耦合，一个输出端(为描述方便，本文中称为控制器230的第二输出端)与主收发机240耦合，另一个输出端(为描述方便，本文中称为控制器230的第三输出端)与唤醒接收机220耦合。
在一个示例中，图4中，主收发机240可以包括两个输入端和两个输出端。主收发机240的一个输入端(为描述方便，本文中称为主收发机240的第一输入端)与开关210耦合，另一个输入端(为描述方便，本文中称为主收发机240的第二输入端)与控制器230耦合。主收发机240的一个输出端(为描述方便，本文中称为主收发机240的第一输出端)与开关210耦合，另一个输出端(为描述方便，本文中称为主收发机240的第二输出端)与控制器230耦合。
在接收机200采用上述耦合关系时，接收机200的工作过程可以如下：
第二电子设备在待机状态下，开关210的第一输入端与开关210的第一输出端耦合，开关210的第一输入端与开关210的第二输出端之间保持断开状态。此时，唤醒接收机220处于工作状态，主收发机240处于休眠状态。
在待机状态下，当满足预设的唤醒触发条件，发射机100通过发射天线发射唤醒信号。唤醒接收机220通过唤醒接收机220的第一输入端接收到发射机100发射的唤醒信号后，生成指示唤醒主收发机240的信号，并将指示唤醒主收发机240的信号通过输出端发送给控制器230。并且，唤醒接收机220从工作状态切换到休眠状态。
控制器230通过控制器230的第一输入端接收到唤醒接收机220发送的指示唤醒主收发机240的信号，生成指示开关210指向主收发机240的第一控制信息，以及生成指示主收发机240切换到工作状态的第二控制信息，将第一控制信息通过控制器230的第一输出端发送给开关210，将第二控制信息通过控制器230的第二输出端发送给主收发机240。
开关210通过开关210的第二输入端接收控制器230发送的第一控制信息，根据第一控制信息，将开关210的第一输入端切换到与开关210第二输出端耦合，此时，开关210的第一输入端与开关210的第一输出端之间切换到断开耦合的状态，主收发机240的第一输入端通过开关210的第二输出端、开关210的第一输入端与接收机天线耦合。
主收发机240通过主收发机240的第二输入端接收到第二控制信息后，从休眠状态切换到工作状态。至此，完成一次唤醒过程。
主收发机240从休眠状态切换到工作状态后，可以通过第一输出端向发射机100发送唤醒成功通知。发射机100接收到唤醒成功通知，可以停止发送唤醒信号。
此后，发射机100与接收机200中的主收发机240基于通信协议，例如蓝牙协议、WiFi协议、D2D协议等，建立通信连接。在成功建立通信连接后，发射机100通过发射天线，将数据信号发射给接收机200，接收机200中的主收发机240接收数据信号并进行相应处理，与发射机100之间进行数据通信。
当主收发机240未接收到数据信号的时长达到预设时间阈值，主收发机240可以通过 第二输出端向控制器230发送休眠通知信息，然后从工作状态切换到休眠状态。主收发机240所在的第二电子设备进入待机状态。
控制器230通过控制器230的第二输入端接收到主收发机240发送的休眠通知信息，生成指示开关210指向唤醒接收机220的第三控制信息，以及生成指示唤醒接收机220切换到工作状态的第四控制信息，将第三控制信息通过控制器230的第一输出端发送给开关210，将第四控制信息通过控制器230的第三输出端发送给唤醒接收机220。
唤醒接收机220通过唤醒接收机220的第二输入端接收到第四控制信息，根据第四控制信息的指示从休眠状态切换到工作状态。接收天线进行侦听扫描，直至再次接收到发射机100发射的唤醒信号，执行下一次唤醒。
需要说明的是，上述接收机200的工作过程仅为用于说明接收机200的工作原理的一个示例，并不用于对接收机200的工作过程进行限制。本领域技术人员可以理解，结合实际应用场景，在本申请其他实施例中，接收机200可以采用与上述示例的耦合关系不同的其他耦合关系，接收机200可以基于该其他耦合关系采用不同于上述示例的工作过程的其他工作过程。
例如，在上述示例的耦合关系基础上，可以去掉控制器230的第二输出端，在该新耦合关系基础上，当控制器230通过控制器230的第一输入端接收到唤醒接收机220发送的指示唤醒主收发机240的信号，生成指示将开关210的第一输入端切换到与开关210第二输出端耦合的第一控制信息，无需生成指示主收发机240切换到工作状态的第二控制信息，将第一控制信息通过控制器230的第一输出端发送给开关210。
开关210通过开关210的第二输入端接收控制器230发送的第一控制信息，根据第一控制信息，将开关210的第一输入端切换到与开关210第二输出端耦合，此时，开关210的第一输入端与开关210的第一输出端之间切换到断开耦合的状态，主收发机240的第一输入端通过开关210的第二输出端、开关210的第一输入端与接收天线耦合。
主收发机240响应于监测到主收发机240的第一输入端通过开关210的第二输出端、开关210的第一输入端与接收天线耦合，从休眠状态切换到工作状态。
本申请实施例中，唤醒触发条件可以根据实际应用需求设置。在一个示例中，唤醒触发条件可以是：发射机100所在的第一电子设备接收到需要转发给接收机200所在的第二电子设备的通信数据，该通信数据例如可以是语音信息、视频信息等。在另一个示例中，唤醒触发条件可以是：发射机100所在的第一电子设备响应于用户的触发操作而生成启动唤醒的指令。需要说明的是，该两种唤醒触发条件仅为示意性举例，本申请实施例不对唤醒触发条件进行限定。
本申请实施例中，主收发机240可以是多种通信协议例如蜂窝、Wifi、蓝牙等协议共用的模块，主收发机240能够与发射机100之间进行蜂窝、Wifi、蓝牙等协议的数据通信
在图4所示的接收机200的架构中，可以采用微控制单元(Microcontroller Unit，MCU)作为控制器230。
需要说明的是，在一个示例中，一个电子设备可以仅作为上述的第一电子设备使用，例如，在包括基站和手机的唤醒系统中，基站为第一电子设备，基站中包括图4中所示的发射机100，但不包括图4中所示的接收机200。
在另一个示例中，一个电子设备也可以仅作为上述的第二电子设备使用，例如，在包 括手机和电子标签的唤醒系统中，电子标签为第二电子设备，电子标签中包括图4中所示的接收机200，但不包括图4中所示的发射机100。
在又一个示例中，一个电子设备还可以既作为上述的第一电子设备使用，又作为上述的第二电子设备使用，此时，该电子设备对应两个唤醒系统，例如手机，在包括手机和电子标签的唤醒系统中，手机为第一电子设备，在包括基站和手机的唤醒系统中，手机为第二电子设备，此时，手机中既包括与基站中的发射机100对应的接收机200，也包括与电子标签中的接收机200对应的发射机100。
需要说明的是，本申请实施例对唤醒系统中第一电子设备和第二电子设备在唤醒过程中的通信距离不作限定。
接下来，结合附图对唤醒接收机220的结构进行详细说明。
图5为示例性示出的图4中唤醒接收机220的结构示意图。请参见图5，唤醒接收机220可以包括射频信号匹配网络221、多路并联的信号处理电路222、逻辑或运算电路223、唤醒信号发生器224。射频信号匹配网络221的输入端与接收机天线耦合，射频信号匹配网络221的输出端分别与每一路信号处理电路的输入端耦合，每一路信号处理电路的输入端都与逻辑或运算电路223的输入端耦合，逻辑或运算电路223的输出端与唤醒信号发生器224耦合。
其中，射频信号匹配网络221用于实现唤醒接收机220与接收机天线之间的阻抗匹配。信号处理电路222用于对输入信号(本文中，输入信号为接收天线接收的由第一电子设备中发射机100的发射信号)进行处理，确定输入信号中是否有与本地存储的唤醒序列的相关性大于预设的相关性阈值的信号，如果有，则确定接收到唤醒信号。当输入信号中包括的唤醒序列与本地存储的唤醒序列的相关性大于预设的相关性阈值，信号处理电路222输出指示接收到唤醒信号的信号(例如数字信号1或高电平信号)，否则输出指示未接收到唤醒信号的信号(例如数字信号0或低电平信号)。逻辑或运算电路223用于对多路并联的信号处理电路222输出的高、低电平信号或数字信号进行逻辑或运算。如果逻辑或运算电路223的逻辑或运算结果为1，则输出指示接收到唤醒信号的信号(例如数字信号1或高电平信号)给唤醒信号发生器224，如果逻辑或运算结果为0，则输出指示未接收到唤醒信号的信号(例如数字信号0或低电平信号)给唤醒信号发生器224。当唤醒信号发生器224接收到逻辑或运算电路223发送的指示接收到唤醒信号的信号，生成指示唤醒主收发机240的信号，并将指示唤醒主收发机240的信号发送给控制器230。以便控制器230在接收到指示唤醒主收发机240的信号后，生成指示开关210指向主收发机240的第一控制信息，以及生成指示主收发机240切换到工作状态的第二控制信息，将第一控制信息通过控制器230的第一输出端发送给开关210，将第二控制信息通过控制器230的第二输出端发送给主收发机240。当唤醒信号发生器224接收到逻辑或运算电路223发送的指示未接收到唤醒信号的信号，唤醒信号发生器224保持原有状态。
其中，多路信号处理电路222的工作频点不同，每一路信号处理电路222在各自的工作频点接收唤醒信号。
图6为示例性示出的图5中信号处理电路222和逻辑或运算电路223的信号传输关系示意图。本申请实施例中，假设指示接收到唤醒信号的信号为数字信号1，指示未接收到唤醒信号的信号为数字信号0。请参见图6，假设共有n路信号处理电路，分别为信号处 理电路1、信号处理电路2……和信号处理电路n。每一路信号处理电路分别对输入信号进行处理，其中，信号处理电路1对输入信号进行处理后，输出1，信号处理电路2对输入信号进行处理后，输出0，……信号处理电路n对输入信号进行处理后，输出1。逻辑或运算电路对n路信号处理电路输出的数字信号进行逻辑或运算，输出运算结果1。这样，只要至少一路信号处理电路对输入信号进行处理后，输出1，逻辑或运算电路输出的运算结果都是1，该数字信号1用于后续触发控制器230唤醒主收发机240。在唤醒接收机220中的全部信号处理电路都输出0时，逻辑或运算电路输出的运算结果才是0，该数字信号0不会触发对唤醒主收发机240的唤醒。
可见，本申请实施例通过多个并行的信号处理电路，增加了唤醒接收机220成功捕获唤醒信号的概率，提高了收发机240被唤醒的概率，从而减小了唤醒时延。
需要说明的是，在本申请其他实施例中，唤醒接收机220也可以只包括一路信号处理电路222。此时，唤醒接收机220中不包括逻辑或运算电路223，信号处理电路222输出的信号直接传输给唤醒信号发生器224。这样，可以简化唤醒接收机220的结构，节约硬件成本，并减小功耗。
图7为示例性示出的图5中信号处理电路222的结构示意图。请参见图7，信号处理电路222可以包括极窄带带通滤波器222a、包络检波器222b、多路并联的比较器222c和相关器222d、逻辑或运算电路222e。极窄带带通滤波器222a的输入端与射频信号匹配网络221的输出端耦合，极窄带带通滤波器222a的输出端与包络检波器222b的输入端耦合，包络检波器222b的输出端分别与每一个比较器222c的输入端耦合，比较器222c的的输出端与相关器222d的输入端耦合，相关器222d的输出端与逻辑或运算电路222e的输入端耦合，逻辑或运算电路222e的输出端与图5中所示逻辑或运算电路223的输入端耦合。
其中，极窄带带通滤波器222a用于对输入信号进行过滤，得到极窄带宽的滤波信号。极窄带带通滤波器222a具有极高的载频-带宽比，能够有效滤除带外噪声和干扰，显著提高唤醒接收机220的抗干扰能力。
包络检波器222b用于提取极窄带带通滤波器222a输出的滤波信号的幅度包络，得到基带脉冲信号。
在并联电路中，每一路中的比较器222c和相关器222d串联。比较器222c用于将包络检波器222b输出的基带脉冲信号的电压与参考电压进行比较，输出0/1电平序列。其中，当基带脉冲信号的电压大于或等于参考电压，比较器222c输出1；当基带脉冲信号的电压小等于参考电压，比较器222c输出0。
在一个示例中，比较器222c中可以包括积分器电路，积分器电路用于将输入的基带脉冲信号转换为单脉冲信号，然后将单脉冲信号的电压与参考电压进行比较。
本申请实施例中，不同比较器222c所使用的参考电压值不同，不同的参考电压值与第一电子设备和第二电子设备之间的不同距离相适应，使得第一电子设备和第二电子设备之间处于不同的距离时，都能够有至少一路比较器222c能够输出准确的0/1电平序列，从而提高唤醒接收机的灵敏度。
发射机100的发射功率一定时，第一电子设备和第二电子设备之间的距离越大，唤醒接收机220接收到的上述输入信号越弱，相应地，基带脉冲信号的电压或者基带脉冲信号转换成的单脉冲信号越小，此时，需要的参考电压也越小。反之，第一电子设备和第二电 子设备之间的距离越小，唤醒接收机220接收到的上述输入信号越强，相应地，基带脉冲信号的电压或者基带脉冲信号转换成的单脉冲信号越大，此时，需要的参考电压也越大。
表1为第一电子设备和第二电子设备之间的距离d与参考电压值V的对应关系表。
表1
Figure PCTCN2022118235-appb-000001
表1中，d1<d2<d3，对应地，V1>V2>V3。当第一电子设备和第二电子设备之间的距离d≤d1时，利用参考电压值V＝V1的比较器能够获得0/1电平序列；当第一电子设备和第二电子设备之间的距离d1≤d≤d2时，利用参考电压值V＝V2的比较器能够获得0/1电平序列；当第一电子设备和第二电子设备之间的距离d2≤d≤d3时，利用参考电压值V＝V3的比较器能够获得0/1电平序列……以此类推。
相关器222d用于获取比较器222c输出的0/1电平序列与当前设备本地存储的唤醒序列(也即预设的唤醒序列)的相关性指标值，如果该两个序列的相关性指标值大于预设的相关性阈值，相关器222d输出指示接收到唤醒信号的信号(例如数字信号1或高电平信号)，否则输出指示未接收到唤醒信号的信号(例如数字信号0或低电平信号)。
逻辑或运算电路222e用于对多路并联的比较器222c和相关器222d输出的高、低电平信号或数字信号进行逻辑或运算。假设指示接收到唤醒信号的信号为数字信号1，指示未接收到唤醒信号的信号为数字信号0。逻辑或运算电路222e输出逻辑或运算结果给逻辑或运算电路223。
图8为示例性示出的比较器和相关器的信号传输关系示意图。请参见图8，假设每一路信号处理电路包括k路比较器和相关器，分别为比较器1和相关器1、比较器2和相关器2……比较器k和相关器k。同一基带脉冲信号分别被输入到每一路比较器和相关器，比较器1和相关器1对基带脉冲信号处理后输出数字信号0，比较器2和相关器2对基带脉冲信号处理后输出数字信号0，……比较器k和相关器k对基带脉冲信号处理后输出数字信号0，即全部相关器的输出均为数字信号0，逻辑或运算电路222e输出数字信号0，逻辑或运算电路222e的输出即为对应的信号处理电路的输出。如果k路比较器和相关器中的至少一路输出数字信号1，对应的信号处理电路的输出为数字信号1，从而可以唤醒主收发机240。
可见，本申请实施例通过多路并联的采用不同参考电压的比较器和对应的相关器，提高了唤醒接收机220的灵敏度，有助于减小唤醒时延。
需要说明的是，在本申请其他实施例中，每一路信号处理电路222中可以只包括一路比较器222c和相关器222d。此时，信号处理电路222中不包括逻辑或运算电路222e，相关器222d直接将数字信号输出给逻辑或运算电路223(此时唤醒接收机220中有多路信号处理电路222)或者输出给唤醒信号发生器224(此时唤醒接收机220中只有一路信号 处理电路222)。这样，可以简化信号处理电路222的结构，节约硬件成本，并减小功耗。
接下来，结合前面图4、图5、图7的电路结构的描述，进一步对图4所示实施例中唤醒信号的发射和接收机制进行说明。
本申请实施例中，极窄带带通滤波器222a的带宽很小，示例性的，极窄带带通滤波器222a的带宽可以小于1MHz。采用很小带宽的极窄带带通滤波器222a可以显著地提高唤醒接收机220的抗干扰能力。但是，极窄带带通滤波器222a存在温漂。例如，极窄带带通滤波器222a的温漂即为极窄带带通滤波器222a所在信号处理电路222的温漂。假设设计的极窄带带通滤波器222a的工作频点为f，在极窄带带通滤波器222a实际工作时，实际工作频点为f’，f’与f为不同频点。
针对温漂问题，本申请实施例提出了相应的发射唤醒信号的方式。
示例性的，图4所示的发射机100可以通过如下方式来发射唤醒信号。
第一种发射唤醒信号的方式为多频点发射方式。在该方式中，发射机100在多个频点发射窄带宽的唤醒信号。其中，唤醒信号的带宽可以根据应用需求设置，例如小于1MHz。
图9为示例性示出的多频点发射方式中发射机的发射信号和唤醒接收机的接收信号示意图。此处，唤醒接收机的接收信号指经过极窄带带通滤波器222a过滤后得到的滤波信号。请参见图9，本申请实施例中，发射机100可以分别在频点1、频点2、频点3、频点4这4个频点发射窄带宽的唤醒信号。唤醒接收机220通过不同工作频点的多路并联的信号处理电路中的极窄带带通滤波器222a，分别对接收天线接收的前述输入信号进行极窄带滤波，只要任一个极窄带带通滤波器222a在频点1、频点2、频点3、频点4中任一频点上过滤得到的滤波信号为唤醒信号，即可成功唤醒主收发机240。
举例来说，假设唤醒接收机220中包括2路并联的信号处理电路，第1路信号处理电路的工作频点为频点2，第2路信号处理电路的工作频点为频点3，发射机100的发射频点分别为频点1、频点2、频点3、频点4。如果该路信号处理电路的工作频点都发生了温漂，第1路信号处理电路在温漂后的实际工作频点是频点5，第2路信号处理电路在温漂后的实际工作频点是频点1，则第2路信号处理电路在温漂后能够在频点1成功接收到唤醒信号。如果发射机100仅通过单个频点发射唤醒信号，例如仅在频点4发射唤醒信号，则上述2路信号处理电路在温漂后都无法接收到唤醒信号。
可见，多频点发射方式通过增加发射频点的数量，增大了信号处理电路温漂后的实际工作频点与发射唤醒信号的频点的匹配概率，能够有效地对抗温漂所带来的影响。
请继续参见图9，本申请实施例中，发射的唤醒信号的带宽与唤醒接收机220中极窄带带通滤波器222a的带宽(为描述方便，本文中称为接收带宽)相等。例如，发射的唤醒信号的带宽与唤醒接收机220中极窄带带通滤波器222a的带宽可以为100KHz。
需要说明的是，图9中所示的发射唤醒信号的频点的数量仅为示意性说明，在本申请其他实施例中，可以根据实际应用需求设置更多或更少的发射唤醒信号的频点，本申请实施例对于发射唤醒信号的频点的数量不作限制。并且，上述列举的发射的唤醒信号的带宽、唤醒接收机220中极窄带带通滤波器222a的带宽也为示意性说明，在实际应用中，可以根据需求确定窄带宽(多频点发射方式中发射的唤醒信号的带宽、唤醒接收机220中极窄带带通滤波器222a的带宽)的上限值以及实际带宽值。
图10为示例性示出的多频点发射方式中发射机的发射信号和唤醒接收机的接收信号 与传统方案中发射机的发射信号和唤醒接收机的接收信号的带宽对比示意图。此处，多频点发射方式中唤醒接收机的接收信号指经过极窄带带通滤波器222a过滤后得到的滤波信号。请参见图10，多频点发射方式中发射机的发射信号和唤醒接收机的接收信号均为极窄带信号，而传统方案中，发射机的发射信号和接收机的接收信号均为宽带信号。相比于传统方案，本申请实施例中唤醒接收机接收信号为窄带宽信号，能够滤除更多的噪声和干扰，因此提高了抗干扰能力。并且，本申请实施例中，发射机100的发射功率集中在唤醒信号所在的窄带宽内，相比于相关方案中的宽带发射信号具有更高的功率密度，因此本申请实施例的唤醒接收机的信干比更高。
图12为示例性示出的多频点发射方式对抗温漂的原理示意图。请参见图12，假设在设计时将唤醒接收机的工作频点定为频点3，在实际工作时，该唤醒接收机的工作频点由于温漂的影响，变成了频点4。这样，即使发生了温漂，但由于发射机在频点3和频点4均发射唤醒信号，因此唤醒接收机仍然能够在发生温漂后的实际工作频点(频点4)接收到唤醒信号，从而能够在存在温漂的情况下成功唤醒主接收机。
在多频点发射方式中，在一个示例中，发射机100可以按照预设的发射周期发射各个频点的唤醒信号，在每一个发射周期，按照预设的发射顺序分时在各频点发射唤醒信号。图11为示例性示出的发射机100发射唤醒信号的时序图。请参见图11，假设发射机100发射唤醒信号的频点有频点1、频点2……频点n这n个频点，在时刻t1，发射机100在频点1发射唤醒信号，在时刻t2，发射机100在频点1发射唤醒信号，……在时刻tn，发射机100在频点n发射唤醒信号，在时刻tn+1，发射机100在频点1发射唤醒信号，在时刻tn+2，发射机100在频点1发射唤醒信号，……在时刻t2n，发射机100在频点n发射唤醒信号。其中，t2n＝2tn。
在多频点发射方式的另一个示例中，发射机100可以按照预设的发射周期发射各个频点的唤醒信号，在每一个发射周期，分别对每个频点进行侦听，在频点满足预设的空闲条件时，在该频点发射唤醒信号。当同一时刻有多个频点都满足预设的空闲条件，可以根据预设的频点优先级，在优先级最高的频点发射唤醒信号。
本申请实施例中，可以采用载波侦听多路访问/冲突避免(Carrier Sense Multiple Access with Collision Avoidance，CSMA/CA)技术进行侦听。当然，CSMA/CA技术仅为本申请实施例中用于侦听的技术的一个示例，本申请实施例不对侦听的技术进行限定。
在一个示例中，空闲条件例如可以是：频点的连续空闲时长达到预设时间阈值。该时间阈值可以根据应用需求确定。
多频点发射方式中，所有发射频点可以采用相同的侦听流程。下面通过一个示例，对每个频点的侦听流程进行说明。
图13为示例性示出的发射唤醒信号的频点的侦听流程图。请参见图13，对于发射唤醒信号的每个频点，侦听过程可以包括如下步骤：
步骤S801，该频点有待发送的唤醒信号物理帧时，开始侦听。
在每个发射周期，每个发射唤醒信号的频点有一个需要发送的唤醒信号物理帧。假设发射周期为T，如果在发射周期T内，某个频点fj对应的唤醒信号物理帧还没有发送，则确定频点fj有待发送的唤醒信号物理帧；如果在发射周期T内，频点fj对应的唤醒信号物理帧已经发送，则确定频点fj没有待发送的唤醒信号物理帧。
步骤S802，确定该频点的连续空闲时长是否达到预设时间阈值，如果该频点的连续空闲时长达到预设时间阈值，执行步骤S803，否则，如果该频点的连续空闲时长还未达到预设时间阈值，执行步骤S802。
在一个示例中，在每个发射周期T开始时，可以为每个发射唤醒信号的频点启动一个计时器，累计该频点的空闲时间，如果在累计过程中，频点被占用，则将计时器的累计时间清零，重新进行累计。这样，通过查询频点对应的计时器的当前累计时间，并将当前累计时间与预设时间阈值进行比较，就可以确定该频点的连续空闲时长是否达到预设时间阈值。
步骤S803，确定当前是否还有其他空闲频点，如果当前有其他空闲频点，执行步骤S804，否则，如果当前没有其他空闲频点，执行步骤S805。
步骤S804，在当前有其他空闲频点，确定该频点的优先级是否高于其他所有空闲频点的优先级，如果该频点的优先级高于其他所有空闲频点的优先级，执行步骤S805，否则，如果其他空闲频点中有至少一个空闲频点的优先级高于该频点，返回步骤S802。
多频点发射方式中，各频点的优先级可以预先设置好。
步骤S805，在该频点发送唤醒信号物理帧，结束该频点本发射周期的侦听过程。
本申请实施例通过在发射唤醒信号前，对发射唤醒信号的频点进行侦听，可以选择频点空闲的时机在频点发射唤醒信号，这样能够降低唤醒信号被干扰的概率，提升信号质量，从而提高唤醒成功率，减小唤醒时延。
在一个示例中，发射机100发射唤醒信号的多个频点可以是不相邻的。例如，图14为示例性示出的发射唤醒信号的多个频点为非相邻频点的示意图，请参见图14，本申请实施例中，发射机100发射唤醒信号的频点有5个，该5个频点分别为2450.05MHz、2450.25MHz……2450.85MHz，每两个频点之间间隔200K Hz，唤醒信号的带宽为100K Hz。
在另一个示例中，发射机100发射唤醒信号的多个频点也可以是相邻的。例如，图15为示例性示出的发射唤醒信号的多个频点为相邻频点的示意图，请参见图15，本申请实施例中，发射机100发射唤醒信号的频点有9个，该9个频点分别为2450.05MHz、2450.15MHz、2450.25MHz……2450.85MHz，每两个频点之间间隔100K Hz，唤醒信号的带宽为100K Hz。
在一个示例中，在多频点发射方式中，发射机100发射唤醒信号的频点数量可以大于唤醒接收机220的工作频点数量，并且，发射机100发射唤醒信号的频点与唤醒接收机220的工作频点至少部分重合。
示例性的，在多频点发射方式中，发射机100发射唤醒信号的频点可以覆盖唤醒接收机220的全部工作频点。例如，图16为示例性示出的发射唤醒信号的频点与唤醒接收机工作频点的对比示意图，请参见图16，发射唤醒信号的频点为2450.05MHz、2450.15MHz、2450.25MHz……2450.85MHz(共9个频点)，唤醒接收机220的工作频点为2450.05MHz、2450.25MHz……2450.85MHz(共5个频点)，发射唤醒信号的9个频点覆盖了唤醒接收机的全部5个工作频点。
示例性的，在多频点发射方式中，发射机100发射唤醒信号的最小频点小于唤醒接收机220的最小工作频点，发射机100发射唤醒信号的最大频点大于唤醒接收机220的最大工作频点。例如，发射唤醒信号的频点为2450.05MHz、2450.15MHz、 2450.25MHz……2450.85MHz(共9个频点)，唤醒接收机220的工作频点为2450.25MHz、2450.45MHz、2450.65MHz(共3个频点)。
在一个示例中，发射唤醒信号的带宽对应的频率范围可以覆盖唤醒接收机220的全部工作频点，且发射唤醒信号的带宽对应的频率范围的最小频率小于唤醒接收机220的最小工作频点对应的接收频率范围的最小频率，发射唤醒信号的带宽对应的频率范围的最大频率大于唤醒接收机220的最大工作频点对应的接收频率范围的最大频率。
在上述示例中，发射机100发射唤醒信号的频点覆盖了唤醒接收机220的全部工作频点，唤醒接收机220捕获唤醒信号的概率大大增加，能够减小唤醒时延，提升用户使用体验。
在另一个示例中，发射机100发射唤醒信号的频点数量也可以小于或等于唤醒接收机220的工作频点数量。此时，唤醒接收机220的工作频点可以覆盖发射机100发射唤醒信号的部分频点或者全部频点。
第二种发射唤醒信号的方式为大带宽发射方式，即以大于唤醒信号所需带宽的带宽发射唤醒信号。
图17为示例性示出的大带宽发射方式中发射机的发射信号和唤醒接收机的接收信号示意图。请参见图17，在大带宽发射方式中，发射机100可以通过大于唤醒信号所需带宽(假设为100KHz)的带宽，例如1MHz，发射唤醒信号。唤醒接收机220通过不同工作频点的多路并联的信号处理电路中的极窄带带通滤波器222a接收极窄带范围内的唤醒信号，只要任一个极窄带带通滤波器222a的工作频点在发射机100所发射的唤醒信号的带宽(1MHz)内，唤醒接收机220就会成功接收到100KHz带宽的唤醒信号，从而可以成功唤醒主收发机240。
举例来说，假设发射机100发射唤醒信号的带宽为1MHz(例如对应的频率范围为2450MHz至2451MHz)，唤醒接收机220中包括2路并联的信号处理电路，唤醒接收机220的接收带宽为100KHz，第1路信号处理电路的工作频点为2450.05MHz(对应的接收频率范围为2450MHz到2450.1MHz)，第2路信号处理电路的工作频点为2450.25MHz(对应的接收频率范围为2450.2MHz到2450.3MHz)。如果该2路信号处理电路的工作频点都发生了温漂，例如，第1路信号处理电路在温漂后的实际工作频点是2449.95MHz(对应的实际接收频率范围为2449.9MHz到2450MHz)，第2路信号处理电路在温漂后的实际工作频点是2450.65MHz(对应的实际接收频率范围为2450.6MHz至2450.7MHz)，则第2路信号处理电路在温漂后仍然能够在2450MHz至2451MHz的频率范围内接收到唤醒信号。而如果发射机100发射唤醒信号的频率范围为2450MHz至2450.1MHz，则第1路信号处理电路和第2路信号处理电路在温漂后都无法接收到唤醒信号。
可见，大带宽发射方式通过增加发射带宽，增大了信号处理电路温漂后的实际工作频点对应的接收频率范围被发射带宽覆盖的概率，从而增大了成功接收到唤醒信号的概率，能够有效地对抗温漂所带来的影响。
图18为示例性示出的大带宽发射方式对抗温漂的原理示意图。请参见图18，假设在设计时将唤醒接收机的工作频点定为频点3，在实际工作时，该唤醒接收机的工作频点由于温漂的影响，变成了频点4。这样，即使发生了温漂，但由于发射机的发射带宽完全覆盖了频点3和频点4的唤醒信号范围，因此唤醒接收机仍然能够在发生温漂后的实际工作 频点(频点4)接收到唤醒信号，从而能够在存在温漂的情况下成功唤醒主接收机。
在一个示例中，发射唤醒信号的带宽对应的频率范围可以覆盖唤醒接收机220的全部工作频点对应的全部接收频率范围，且发射唤醒信号的带宽对应的频率范围的最小频率小于唤醒接收机220的最小工作频点对应的接收频率范围的最小频率，发射唤醒信号的带宽对应的频率范围的最大频率大于唤醒接收机220的最大工作频点对应的接收频率范围的最大频率。
图19为示例性示出的大带宽发射方式中发射机的发射信号和唤醒接收机的接收信号与传统方案中发射机的发射信号和唤醒接收机的接收信号的带宽对比示意图。请参见图19，大带宽发射方式中发射机的发射信号与传统方案中发射机的发射信号宽带相同，但大带宽发射方式中唤醒接收机的接收信号的带宽远小于传统方案中接收机的接收信号带宽，这样，相比于传统方案，本申请实施例的大带宽发射方式中唤醒接收机能够滤除更多的噪声和干扰，信干比更高，提高了抗干扰能力。
本申请实施例中，发射机100和唤醒接收机220中分别存储唤醒信号的物理帧结构信息。这样，发射机100根据存储的物理帧结构信息确定待发射的唤醒信号物理帧，唤醒接收机220根据存储的物理帧结构信息识别每一路信号处理电路所过滤得到的滤波信号是否为唤醒信号。
在一个示例中，唤醒信号可以采用自定义的物理帧结构。图20为示例性示出的唤醒信号的一种物理帧结构图。请参见图20，唤醒信号物理帧可以包括头部和媒体存取控制地址(Media Access Control Address，MAC)协议数据单元。其中，唤醒信号物理帧头部承载唤醒接收机同步信号序列，MAC协议数据单元承载唤醒接收机设备ID。在发射机100和唤醒接收机220中存储的唤醒信号的物理帧结构信息中，包括唤醒接收机同步信号序列的内容。唤醒接收机220中存储有自身的唤醒接收机设备ID，每个唤醒接收机设备ID对应主收发机240。这样，唤醒接收机220可以根据唤醒接收机同步信号序列识别接收信号是否为唤醒信号，根据唤醒接收机设备ID识别唤醒接收机220所在的第二电子设备中的主收发机240是否为唤醒对象。
例如，假设定义唤醒信号物理帧的头部包括x比特(bit)，MAC协议数据单元m包括y比特，x、y为自然数。唤醒接收机220从接收信号对应的物理帧中提取前x比特数据，将该x比特数据与自身中存储的唤醒接收机同步信号序列进行比对，如果两者匹配，则确定接收信号为唤醒信号。唤醒接收机220从接收信号对应的物理帧中提取后y比特数据，将该y比特数据与自身存储的唤醒接收机设备ID进行比对，如果两者匹配，则确定唤醒接收机220所在的第二电子设备中的主收发机240为唤醒对象。
此处，匹配可以指：被比对的双方数据的相关性指标值大于或等于预设的相关性阈值。其中，比对的双方数据的相关性指标值可以采用相关技术中的相关性计算方式得到，本申请实施例对于相关性指标值的计算方式不作限制，此处不再赘述。
在另一个示例中，唤醒信号可以采用符合802.11中通信协议规定的物理帧结构。图21为示例性示出的唤醒信号的另一种物理帧结构图。请参见图21，该唤醒信号物理帧是符合WiFi协议规定的唤醒信号物理帧，该唤醒信号物理帧仍然包括头部和MAC协议数据单元，但与图20所示唤醒信号物理帧结构不同的是，图21中的唤醒信号物理帧的头部承载的是WiFi前导码和唤醒接收机同步信号序列。示例性的，WiFi前导码可以包括短训 练序列(Legacy Short Training Field，L-STF)、长训练序列(Legacy Long Training Field，L-LTF)、信令序列(Legacy Signal Field，L-SIG)和二进制相移键控标识(Binary Phase Shift Keying Mark，BPSK-Mark)。图21中的唤醒信号物理帧的MAC协议数据单元承载唤醒接收机设备ID。在发射机100和唤醒接收机220中存储的唤醒信号的物理帧结构信息中，包括WiFi前导码和唤醒接收机同步信号序列的内容。唤醒接收机220中存储有自身的唤醒接收机设备ID，每个唤醒接收机设备ID对应主收发机240。这样，唤醒接收机220可以根据WiFi前导码和唤醒接收机同步信号序列识别接收信号是否为唤醒信号，根据唤醒接收机设备ID识别唤醒接收机220所在的第二电子设备中的主收发机240是否为唤醒对象。
例如，假设定义唤醒信号物理帧的头部包括z比特的WiFi前导码和x比特的唤醒接收机同步信号序列，MAC协议数据单元m包括y比特，x、y、z为自然数。唤醒接收机220从接收信号对应的物理帧中提取前z+x比特数据，将该z+x比特数据中前z比特数据与自身中存储的WiFi前导码进行比对，得到第一匹配结果，将该z+x比特数据中后x比特数据与自身中存储的唤醒接收机同步信号序列进行比对，得到第二匹配结果，如果第一匹配结果和第二匹配结果均指示匹配，则确定接收信号为唤醒信号。唤醒接收机220从接收信号对应的物理帧中提取后y比特数据，将该y比特数据与自身存储的唤醒接收机设备ID进行比对，如果两者匹配，则确定唤醒接收机220所在的第二电子设备中的主收发机240为唤醒对象。
需要说明的是，图21所示的唤醒信号物理帧结构仅为示意性举例，在本申请其它实施例中，还可以采用符合其他通信协议，例如蓝牙协议、D2D协议规定的唤醒信号物理帧结构，本申请实施例不对唤醒信号的物理帧结构进行限定。
需要说明的是，在一个示例中，发射机100发射的唤醒信号中的唤醒接收机设备ID可以对应一个第二电子设备，此时唤醒信号用于唤醒一个第二电子设备。在另一个示例中，发射机100发射的唤醒信号中的唤醒接收机设备ID也可以对应一组第二电子设备(同一组中的所有第二电子设备对应的唤醒接收机设备ID相同)，此时唤醒信号用于唤醒一组第二电子设备。
这里，通过一个示例，对本申请实施例的唤醒方法作进一步详细说明。
本申请实施例中，第一电子设备为WiFi路由器，WiFi路由器包括图4所示的发射机100。第二电子设备为手机，手机包括图4所示的接收机200，主收发机240为手机中的WiFi模块。在手机待机过程中，手机中的WiFi模块处于休眠状态，手机中的唤醒接收机处于工作状态。
WiFi路由器唤醒手机中WiFi模块的流程可以包括如下步骤：
WiFi路由器接收到需转发给手机上的应用a的信息A，触发唤醒流程；
WiFi路由器以T为周期，在每个周期T内，分时在s个频点上发射唤醒信号，s为自然数，该唤醒信号中包括唤醒序列1，唤醒序列1中包括设备ID1；
手机的接收天线接收到唤醒信号后，将该唤醒信号作为输入信号输出给每一路信号处理电路222；各路信号处理电路222中的极窄带带通滤波器222a根据自身的工作频点对输入信号进行过滤，得到滤波信号；
在每一路信号处理电路222中，包络检波器222b提取本路信号处理电路中极窄带带 通滤波器输出的滤波信号的幅度包络，得到基带脉冲信号；然后，将基带脉冲信号分别输出给n路比较器222c和相关器222d；
每一路比较器222c和相关器222d中，比较器222c将包络检波器222b输出的基带脉冲信号的电压与自身的参考电压进行比较，得到0/1电平序列，将0/1电平序列输出给相关器；相关器222d将比较器222c输出的0/1电平序列与手机本地存储的唤醒序列2进行比对，如果该0/1电平序列与唤醒序列2的相关性大于预设的相关性阈值，相关器222d输出指示接收到唤醒信号的信号，例如为数字信号1，否则输出指示未接收到唤醒信号的信号，例如为数字信号0；
位于每一路信号处理电路222中的逻辑或运算电路222e对该路信号处理电路222中的所有相关器222d的输出结果进行逻辑或运算，得到该路信号处理电路222的输出信号(0或1)；
逻辑或运算电路223对所有信号处理电路222的输出信号进行逻辑或运算，得到输出信号0或1，如果输出信号0，则输出指示未接收到唤醒信号的信号给唤醒信号发生器224，唤醒信号发生器224保持原有状态；如果输出信号1，则输出指示接收到唤醒信号的信号给唤醒信号发生器224，唤醒信号发生器224生成指示唤醒手机中WiFi模块的信号给控制器230，控制器230通过控制指令控制手机中的WiFi模块进入工作状态，以及控制唤醒接收机进入休眠状态，并通知WiFi路由器WiFi模块已被唤醒；
WiFi路由器将信息A发送给手机，手机上的WiFi模块接收信息A，并将信息A发送给手机上的应用a；
如果此后WiFi路由器没有通信数据再发送给手机上的WiFi模块，则手机上的WiFi模块等待一段预设的时间后自动进行休眠状态，并通知手机上的控制器230，控制器230通过控制指令控制唤醒接收机220进入工作状态，直到再一次接收到唤醒信号，执行下一次唤醒手机上的WiFi模块的过程。
需要说明的是，手机中存储的唤醒序列2包括手机的设备ID2。如果WiFi路由器的唤醒对象为手机，则WiFi路由器发射的唤醒信号包括的唤醒序列1中的设备ID1与唤醒序列2中的设备ID2完全一致。如果手机中的唤醒接收机220准确接收了WiFi路由器发射的唤醒信号，则手机中比较器222c输出的0/1电平序列中的设备ID应该与唤醒序列1中的设备ID1完全一致。但由于比较器222c中参考电压与WiFi路由器和手机之间距离的匹配准确度关系，手机中比较器222c输出的0/1电平序列中的设备ID与唤醒序列1中的设备ID1可能不完全一致，因此手机中比较器222c输出的0/1电平序列中的设备ID与唤醒序列2中的设备ID2可以不完全一致，只要手机中比较器222c输出的0/1电平序列中的设备ID与唤醒序列2中的设备ID2的相关性指标值大于预设的相关性阈值，就认为WiFi路由器发射的唤醒信号是针对手机所发出的。
可以理解的是，电子设备为了实现上述功能，其包含了执行各个功能相应的硬件和/或软件模块。结合本文中所公开的实施例描述的各示例的算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。本领域技术人员可以结合实施例对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
一个示例中，图22为示例性示出的本申请实施例的一种装置900的示意性框图。装置900可包括：处理器901和收发器/收发管脚902，可选地，还包括存储器903。
装置900的各个组件通过总线904耦合在一起，其中总线904除包括数据总线之外，还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见，在图中将各种总线都称为总线904。
可选地，存储器903可以用于前述方法实施例中的指令。该处理器901可用于执行存储器903中的指令，并控制接收管脚接收信号，以及控制发送管脚发送信号。
装置900可以是上述方法实施例中的电子设备或电子设备的芯片。
其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
其中，本实施例提供的电子设备、计算机存储介质、计算机程序产品或芯片均用于执行上文所提供的对应的方法，因此，其所能达到的有益效果可参考上文所提供的对应的方法中的有益效果，此处不再赘述。
通过以上实施方式的描述，所属领域的技术人员可以了解到，为描述的方便和简洁，仅以上述各功能模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将装置的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，模块或单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个装置，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是一个物理单元或多个物理单元，即可以位于一个地方，或者也可以分布到多个不同地方。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
本申请各个实施例的任意内容，以及同一实施例的任意内容，均可以自由组合。对上述内容的任意组合均在本申请的范围之内。
集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个可读取存储介质中。基于这样的理解，本申请实施例的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该软件产品存储在一个存储介质中，包括若干指令用以使得一个设备(可以是单片机，芯片等)或处理器(processor)执行本申请各个实施例方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
上面结合附图对本申请的实施例进行了描述，但是本申请并不局限于上述的具体实施 方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本申请的启示下，在不脱离本申请宗旨和权利要求所保护的范围情况下，还可做出很多形式，均属于本申请的保护之内。

Claims (22)

  1. 一种唤醒方法，其特征在于，包括：
    第一信号处理电路在第一频点上进行监听；
    第二信号处理电路在第二频点上进行监听；所述第二频点与所述第一频点不相同；
    所述第二信号处理电路在所述第二频点上接收到唤醒信号；所述唤醒信号的带宽小于第一值；所述唤醒信号是第一电子设备在多个发射频点上发射的或在大于第二值的带宽上发射的；所述第二值大于所述第一值；
    所述第一信号处理电路在所述第二频点上进行监听；
    所述第二信号处理电路在第三频点上进行监听；所述第三频点与所述第一频点、所述第二频点都不相同；
    所述第一信号处理电路在所述第二频点上接收到所述唤醒信号。
  2. 根据权利要求1所述的方法，其特征在于，
    所述第一信号处理电路输出第一逻辑值，所述第一逻辑值用于指示所述第一信号处理电路接收到唤醒信号；
    所述第二信号处理电路输出第二逻辑值，所述第二逻辑值用于指示所述第二信号处理电路未接收到唤醒信号；
    第一逻辑或运算电路根据所述第一逻辑值和所述第二逻辑值，确定接收到唤醒信号。
  3. 根据权利要求1所述的方法，其特征在于，所述第一信号处理电路包括极窄带带通滤波器、包络检波器、比较器和相关器，所述极窄带带通滤波器的输入端与天线耦合，所述包络检波器的输入端与所述极窄带带通滤波器的输出端耦合，所述比较器的输入端与所述包络检波器的输出端耦合，所述相关器的输入端与所述比较器的输出端耦合；
    所述第一信号处理电路在所述第二频点上接收到所述唤醒信号，包括：
    所述极窄带带通滤波器对在所述第二频点上监听到的第一信号进行极窄带带通滤波，得到极窄带宽的滤波信号；
    所述包络检波器提取所述滤波信号的幅度包络，得到基带脉冲信号；
    所述比较器将所述基带脉冲信号的电压与参考电压进行比较，得到第一数字信号序列；
    所述相关器获取所述第一数字信号序列与预设的唤醒序列的第一相关性指标值，并将所述第一相关性指标值与预设的相关性阈值进行比较，得到相关性比较结果，当所述相关性比较结果指示所述第一相关性指标值大于所述相关性阈值，所述第一信号为唤醒信号。
  4. 根据权利要求3所述的方法，其特征在于，所述比较器包括第一比较器和第二比较器，所述第一比较器的输入端和所述第二比较器的输入端分别与所述包络检波器的输出端耦合；所述相关器包括第一相关器和第二相关器，所述第一相关器的输入端与所述第一比较器的输出端耦合，所述第二相关器的输入端与所述第二比较器的输出端耦合；所述第一信号处理电路还包括第二逻辑或运算电路，所述第一相关器的输出端和所述第二相关器的输出端分别与所述第二逻辑或运算电路的输入端耦合；
    所述比较器将所述基带脉冲信号的电压与参考电压进行比较，得到第一数字信号序 列，包括：
    所述第一比较器将所述基带脉冲信号的电压与第一参考电压进行比较，得到第一备选数字信号序列；
    所述第二比较器将所述基带脉冲信号的电压与第二参考电压进行比较，得到第二备选数字信号序列；所述第二参考电压与所述第一参考电压不相同；
    所述相关器获取所述第一数字信号序列与预设的唤醒序列的第一相关性指标值，并将所述第一相关性指标值与预设的相关性阈值进行比较，得到相关性比较结果，当所述相关性比较结果指示所述第一相关性指标值大于所述相关性阈值，所述第一信号为唤醒信号，包括：
    所述第一相关器获取所述第一备选数字信号序列与预设的唤醒序列的第一相关性指标值的第一备选值，并将所述第一相关性指标值的第一备选值与预设的相关性阈值进行比较，得到第一相关性比较结果；
    所述第二相关器获取所述第二备选数字信号序列与预设的唤醒序列的第一相关性指标值的第二备选值，并将所述第一相关性指标值的第二备选值与预设的相关性阈值进行比较，得到第二相关性比较结果；
    所述第二逻辑或运算电路对所述第一相关性比较结果和所述第二相关性比较结果进行逻辑或运算，得到第一逻辑或运算结果；当所述第一逻辑或运算结果指示所述第一相关性指标值的第一备选值和所述第一相关性指标值的第二备选值中的至少一个大于预设的相关性阈值，所述第一信号处理电路在所述第二频点上接收到所述唤醒信号。
  5. 根据权利要求1所述的方法，其特征在于，所述第一信号处理电路包括极窄带带通滤波器、包络检波器、包括积分电路的比较器、以及相关器，所述极窄带带通滤波器的输入端与天线耦合，所述包络检波器的输入端与所述极窄带带通滤波器的输出端耦合，所述包括积分电路的比较器的输入端与所述包络检波器的输出端耦合，所述相关器的输入端与所述包括积分电路的比较器的输出端耦合；
    所述第一信号处理电路在所述第二频点上接收到所述唤醒信号，包括：
    所述极窄带带通滤波器对在所述第二频点上监听到的第一信号进行极窄带带通滤波，得到极窄带宽的滤波信号；
    所述包络检波器提取所述滤波信号的幅度包络，得到基带脉冲信号；
    所述包括积分器电路的比较器将所述基带脉冲信号转换为单脉冲信号，并将所述单脉冲信号的电压与参考电压进行比较，得到第二数字信号序列；
    所述相关器获取所述第二数字信号序列与预设的唤醒序列的第二相关性指标值，并将所述第二相关性指标值与预设的相关性阈值进行比较，得到相关性比较结果；当所述相关性比较结果指示所述第二相关性指标值大于预设的相关性阈值，所述第一信号为唤醒信号。
  6. 根据权利要求5所述的方法，其特征在于，所述包括积分电路的比较器包括第三比较器和第四比较器，所述第三比较器和所述第四比较器中均包括积分电路，所述第三比较器的输入端和所述第四比较器的输入端分别与所述包络检波器的输出端耦合；所述相关 器包括第三相关器和第四相关器，所述第三相关器的输入端与所述第三比较器的输出端耦合，所述第四相关器的输入端与所述第四比较器的输出端耦合；所述第一信号处理电路还包括第二逻辑或运算电路，所述第三相关器的输出端和所述第四相关器的输出端分别与所述第二逻辑或运算电路的输入端耦合；
    所述包括积分器电路的比较器将所述基带脉冲信号转换为单脉冲信号，并将所述单脉冲信号的电压与参考电压进行比较，得到第二数字信号序列，包括：
    所述第三比较器将所述基带脉冲信号转换为单脉冲信号，并单脉冲信号的电压与第三参考电压进行比较，得到第三备选数字信号序列；
    所述第四比较器将所述基带脉冲信号转换为单脉冲信号，并单脉冲信号的电压与第四参考电压进行比较，得到第四备选数字信号序列；所述第四参考电压与所述第三参考电压不相同；
    所述相关器获取所述第二数字信号序列与预设的唤醒序列的第二相关性指标值，并将所述第二相关性指标值与预设的相关性阈值进行比较，得到相关性比较结果；当所述相关性比较结果指示所述第二相关性指标值大于预设的相关性阈值，所述第一信号为唤醒信号，包括：
    所述第三相关器获取所述第三备选数字信号序列与预设的唤醒序列的第二相关性指标值的第一备选值，并将所述第二相关性指标值的第一备选值与预设的相关性阈值进行比较，得到第三相关性比较结果；
    所述第四相关器获取所述第四备选数字信号序列与预设的唤醒序列的第二相关性指标值的第二备选值，并将所述第二相关性指标值的第二备选值与预设的相关性阈值进行比较，得到第四相关性比较结果；
    所述第二逻辑或运算电路对所述第三相关性比较结果和所述第四相关性比较结果进行逻辑或运算，得到第二逻辑或运算结果；当所述第二逻辑或运算结果指示所述第二相关性指标值的第一备选值和所述第二相关性指标值的第二备选值中的至少一个大于预设的相关性阈值，所述第一信号为唤醒信号。
  7. 根据权利要求1所述的方法，其特征在于，所述第一频点与所述第二频点为相邻频点。
  8. 根据权利要求1所述的方法，其特征在于，所述第一频点与所述第二频点为非相邻频点。
  9. 根据权利要求1所述的方法，其特征在于，所述多个发射频点包括所述第一频点和所述第二频点中的至少一个频点。
  10. 根据权利要求1所述的方法，其特征在于，所述第一频点和所述第二频点中的至少一个频点处于所述第一电子设备发射所述唤醒信号的带宽内。
  11. 一种唤醒装置，其特征在于，包括：
    第一信号处理电路，所述第一信号处理电路耦合至天线，用于在第一频点上进行监听；
    第二信号处理电路，所述第二信号处理电路耦合至天线，用于在第二频点上进行监听；所述第二频点与所述第一频点不相同；
    所述第二信号处理电路还用于在所述第二频点上接收到唤醒信号；所述唤醒信号的带宽小于第一值；所述唤醒信号是第一电子设备在多个发射频点上发射的或在大于第二值的带宽上发射的；所述第二值大于所述第一值；
    所述第一信号处理电路还用于在所述第二频点上进行监听；
    所述第二信号处理电路器还用于在第三频点上进行监听；所述第三频点与所述第一频点、所述第二频点都不相同；
    所述第一信号处理电路还用于在所述第二频点上接收到所述唤醒信号。
  12. 根据权利要求11所述的装置，其特征在于，
    所述第一信号处理电路，还用于输出第一逻辑值，所述第一逻辑值用于指示所述第一信号处理电路接收到唤醒信号；
    所述第二信号处理电路，还用于输出第二逻辑值，所述第二逻辑值用于指示所述第二信号处理电路未接收到唤醒信号；
    所述装置还包括：
    第一逻辑或运算电路，所述第一逻辑或运算电路的输入端分别与所述第一信号处理电路的输出端和所述第二信号处理电路的输出端耦合，所述第一逻辑或运算电路用于根据所述第一逻辑值和所述第二逻辑值，确定接收到唤醒信号。
  13. 根据权利要求11所述的装置，其特征在于，所述第一信号处理电路包括：
    极窄带带通滤波器，所述极窄带带通滤波器的输入端耦合至天线，用于对在所述第二频点上监听到的第一信号进行极窄带带通滤波，得到极窄带宽的滤波信号；
    包络检波器，所述包络检波器的输入端与所述极窄带带通滤波器的输出端耦合，用于提取所述滤波信号的幅度包络，得到基带脉冲信号；
    比较器，所述比较器的输入端与所述包络检波器的输出端耦合，用于将所述基带脉冲信号的电压与参考电压进行比较，得到第一数字信号序列；
    相关器，所述相关器的输入端与所述比较器的输出端耦合，用于获取所述第一数字信号序列与预设的唤醒序列的第一相关性指标值，并将所述第一相关性指标值与预设的相关性阈值进行比较，得到相关性比较结果，当所述相关性比较结果指示所述第一相关性指标值大于所述相关性阈值，所述第一信号为唤醒信号。
  14. 根据权利要求13所述的装置，其特征在于，所述比较器包括：
    第一比较器，所述第一比较器的输入端耦合至所述包络检波器的输出端，用于将所述基带脉冲信号的电压与第一参考电压进行比较，得到第一备选数字信号序列；
    第二比较器，所述第二比较器的输入端耦合至所述包络检波器的输出端，用于将所述基带脉冲信号的电压与第二参考电压进行比较，得到第二备选数字信号序列；所述第二参考电压与所述第一参考电压不相同；
    所述相关器包括：
    第一相关器，所述第一相关器的输入端耦合至所述第一比较器的输出端，用于获取所述第一备选数字信号序列与预设的唤醒序列的第一相关性指标值的第一备选值，并将所述第一相关性指标值的第一备选值与预设的相关性阈值进行比较，得到第一相关性比较结果；
    第二相关器，所述第二相关器的输入端耦合至所述第二比较器的输出端，用于获取所述第二备选数字信号序列与预设的唤醒序列的第一相关性指标值的第二备选值，并将所述第一相关性指标值的第二备选值与预设的相关性阈值进行比较，得到第二相关性比较结果；
    所述装置还包括第二逻辑或运算电路，所述第二逻辑或运算电路的输入端分别与所述第一相关器的输出端和所述第二相关器的输出端耦合，用于对所述第一相关性比较结果和所述第二相关性比较结果进行逻辑或运算，得到第一逻辑或运算结果；当所述第一逻辑或运算结果指示所述第一相关性指标值的第一备选值和所述第一相关性指标值的第二备选值中的至少一个大于预设的相关性阈值，所述第一信号为唤醒信号。
  15. 根据权利要求11所述的装置，其特征在于，所述第一信号处理电路包括：
    极窄带带通滤波器，所述极窄带带通滤波器的输入端耦合至天线，用于对在所述第二频点上监听到的第一信号进行极窄带带通滤波，得到极窄带宽的滤波信号；
    包络检波器，所述包络检波器的输入端耦合至所述极窄带带通滤波器的输出端，用于检测所述滤波信号的幅度包络，得到基带脉冲信号；
    包括积分器电路的比较器，所述包括积分器电路的比较器的输入端与所述包络检波器的输出端耦合，用于将所述基带脉冲信号转换为单脉冲信号，并将所述单脉冲信号的电压与参考电压进行比较，得到第二数字信号序列；
    相关器，所述相关器的输入端与所述包括积分器电路的比较器的输出端耦合，用于获取所述第二数字信号序列与预设的唤醒序列的第二相关性指标值，并将所述第二相关性指标值与预设的相关性阈值进行比较，得到相关性比较结果；当所述相关性比较结果指示所述第二相关性指标值大于预设的相关性阈值，所述第一信号为唤醒信号。
  16. 根据权利要求15所述的装置，其特征在于，所述包括积分电路的比较器包括：
    第三比较器，所述第三比较器中包括积分电路，所述第三比较器的输入端与所述包络检波器的输出端耦合，用于将所述基带脉冲信号转换为单脉冲信号，并单脉冲信号的电压与第三参考电压进行比较，得到第三备选数字信号序列；
    第四比较器，所述第四比较器中包括积分电路，所述第四比较器的输入端与所述包络检波器的输出端耦合，用于将所述基带脉冲信号转换为单脉冲信号，并单脉冲信号的电压与第四参考电压进行比较，得到第四备选数字信号序列；所述第四参考电压与所述第三参考电压不相同；
    所述相关器包括：
    第三相关器，所述第三相关器的输入端与所述第三比较器的输出端耦合，用于获取所述第三备选数字信号序列与预设的唤醒序列的第二相关性指标值的第一备选值，并将所述 第二相关性指标值的第一备选值与预设的相关性阈值进行比较，得到第三相关性比较结果；
    第四相关器，所述第四相关器的输入端与所述第四比较器的输出端耦合，用于获取所述第四备选数字信号序列与预设的唤醒序列的第二相关性指标值的第二备选值，并将所述第二相关性指标值的第二备选值与预设的相关性阈值进行比较，得到第四相关性比较结果；
    所述装置还包括第二逻辑或运算电路，所述第二逻辑或运算电路的输入端分别与所述第三相关器的输出端和所述第四相关器的输出端耦合，用于对所述第三相关性比较结果和所述第四相关性比较结果进行逻辑或运算，得到第二逻辑或运算结果；当所述第二逻辑或运算结果指示所述第二相关性指标值的第一备选值和所述第二相关性指标值的第二备选值中的至少一个大于预设的相关性阈值，所述第一信号为唤醒信号。
  17. 根据权利要求11所述的装置，其特征在于，所述第一频点与所述第二频点为相邻频点。
  18. 根据权利要求11所述的装置，其特征在于，所述第一频点与所述第二频点为非相邻频点。
  19. 根据权利要求11所述的装置，其特征在于，所述多个发射频点包括所述第一频点和所述第二频点中的至少一个频点。
  20. 根据权利要求11所述的装置，其特征在于，所述第一频点和所述第二频点中的至少一个频点处于所述第一电子设备发射所述唤醒信号的带宽内。
  21. 一种电子设备，其特征在于，包括：
    存储器和处理器，所述存储器与所述处理器耦合；
    所述存储器存储有程序指令，当所述程序指令由所述处理器执行时，使得所述电子设备执行权利要求1-10中任意一项所述的唤醒方法。
  22. 一种计算机可读存储介质，其特征在于，包括计算机程序，当所述计算机程序在电子设备上运行时，使得所述电子设备执行如权利要求1-10中任意一项所述的唤醒方法。
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