WO2021052102A1 - 一种通信设备、射频干扰消除方法及装置 - Google Patents

一种通信设备、射频干扰消除方法及装置 Download PDF

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Publication number
WO2021052102A1
WO2021052102A1 PCT/CN2020/110385 CN2020110385W WO2021052102A1 WO 2021052102 A1 WO2021052102 A1 WO 2021052102A1 CN 2020110385 W CN2020110385 W CN 2020110385W WO 2021052102 A1 WO2021052102 A1 WO 2021052102A1
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WIPO (PCT)
Prior art keywords
signal
cancellation
antenna
interference
antenna array
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Application number
PCT/CN2020/110385
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English (en)
French (fr)
Inventor
刘大庆
王斌
刘小成
王俊
李榕
乔云飞
杜颖钢
余荣道
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to EP20865208.1A priority Critical patent/EP4024718A4/en
Publication of WO2021052102A1 publication Critical patent/WO2021052102A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12—Neutralising, balancing, or compensation arrangements
    • H04B1/123—Neutralising, balancing, or compensation arrangements using adaptive balancing or compensation means
    • 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
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0475—Circuits with means for limiting noise, interference or distortion
    • 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
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0483—Transmitters with multiple parallel paths
    • 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
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/50—Circuits using different frequencies for the two directions of communication
    • H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver

Definitions

  • This application relates to the field of communication technology, and in particular to a communication device, a method and device for eliminating radio frequency interference.
  • the interference generated by the transmitting link to the receiving link may include coupling interference between transceiver radio frequency circuits, near-field coupling interference between transceiver antennas, and echo interference caused by reflectors.
  • the coupling interference delay between radio frequency circuits is the smallest, generally within a few nanoseconds, which can be reduced by adding shielding measures and absorbing materials on the circuit board.
  • the intensity of echo interference caused by reflection is generally small and can be eliminated in the digital domain.
  • the transmitting antenna and the receiving antenna are generally relatively close, and even sharing antennas will cause strong near-field coupling interference, which will seriously affect the normal reception of the received signal. Therefore, reducing the near-field coupling interference between the transmitting and receiving antennas is to achieve full-duplex communication. The first problem faced.
  • the embodiments of the present application provide a communication device, a method and device for eliminating radio frequency interference, so as to eliminate incoming coupling interference and improve the quality of received signals.
  • a communication device in a first aspect, includes a power dividing circuit, a transceiver antenna array, a cancellation circuit, and a combining circuit; the power dividing circuit is used to divide a radio frequency signal into a first transmission signal and a second transmission signal.
  • the first transmission signal is transmitted through the corresponding transmission antenna in the transceiving antenna array, and interferes with each receiving antenna in the transceiving antenna array; the cancellation circuit is configured to interfere with the second
  • the transmission signal undergoes frequency conversion processing to obtain a first cancellation signal set, the first cancellation signal set includes n first cancellation signals, where n is the number of receiving antennas in the transceiver antenna array; the combining circuit is used to use The i-th first cancellation signal cancels the interference signal of the i-th receiving antenna in the transceiver antenna array to obtain the actual received signal of the i-th receiving antenna; the interference signal of the i-th receiving antenna is compared with the The i-th first cancellation signal has the same amplitude and opposite phase, and i takes 1-n.
  • the cancellation circuit can use the second transmission signal to generate a cancellation signal for canceling the interference signal of each receiving antenna, and realize the function of using one transmission signal to generate multiple cancellation signals.
  • the combining circuit uses each first cancellation signal to cancel the interference signal of the corresponding receiving antenna, thereby improving the quality of the signal received by each receiving antenna.
  • the cancellation circuit includes: an up-conversion circuit, a cancellation antenna array, and a down-conversion circuit; the up-conversion circuit is configured to use a local oscillator signal to pair The second transmission signal is up-converted to obtain a third transmission signal; the cancellation antenna array is configured to obtain a second cancellation signal set according to the third transmission signal; the second cancellation signal set includes n Two cancellation signals; the down-conversion circuit is configured to use the local oscillator signal to down-convert the second cancellation signal in the second cancellation signal set to obtain a first cancellation signal set.
  • the third transmission signal is obtained, and the transmission frequency of the third transmission signal is increased, thereby reducing the wavelength of the third transmission signal, thereby reducing the cancellation antenna in the cancellation antenna array. size of.
  • the frequency of the local oscillator signal is determined according to the antenna size reduction multiple and the frequency of the second transmission signal
  • the antenna size reduction factor is determined by dividing the antenna size of the transceiver antenna array by the antenna size of the cancellation antenna array.
  • the local oscillator signal can be determined, and then the frequency of the second transmission signal can be increased to a specified high frequency for transmission.
  • the cancellation antenna array is specifically configured to compare the scattering parameter matrix of the cancellation antenna array with the third possible implementation manner.
  • the transmission signals are multiplied to obtain the second set of cancellation signals;
  • the scattering parameter matrix of the cancellation antenna array and the scattering parameter matrix of the transceiver antenna array are the same at their respective working frequencies or have a multiple relationship;
  • the transceiver antenna The scattering parameter matrix of the array is multiplied by the first transmission signal to generate an interference signal set, and the interference signal set includes the interference signal formed by the first transmission signal to each receiving antenna.
  • the cancellation antenna of the cancellation antenna array has the same physical structure as the transceiver antenna in the transceiver antenna array, and the cancellation antenna and the transceiver antenna work in the same state at their respective operating frequencies, so that the scattering parameter matrix of the cancellation antenna array It is equal to or has a multiple relationship with the scattering parameter matrix of the transceiver antenna array, and the cancellation antenna array can reconstruct the interference signal generated by the transceiver antenna, and then shift the phase to make the cancellation signal and the interference signal have the same amplitude and the phase difference is 180°. Radio frequency interference.
  • the device further includes: a gain amplifying circuit; the gain amplifying circuit is used when the amplitude of the i-th first cancellation signal is equal to that of the i-th first cancellation signal.
  • the amplitude of the i-th first cancellation signal is adjusted to be equal to the amplitude of the interference signal of the i-th receiving antenna.
  • the amplitude of the first cancellation signal in order to ensure that the amplitude of the first cancellation signal is equal to the amplitude of the corresponding interference signal in the received signal to achieve complete cancellation, the amplitude of the first cancellation signal can be adjusted so that the amplitude of the first cancellation signal is equal to that of the interference signal. Are equal in magnitude.
  • the device further includes: a local oscillator source; the local oscillator source is configured to convert the frequency The circuit provides the local oscillator signal.
  • a local oscillator source may be used to provide a local oscillator signal for the up-conversion circuit, so as to implement up-conversion processing on the second transmission signal.
  • a method for eliminating radio frequency interference is provided.
  • the method is applied to the device described in the first aspect, and the method includes:
  • the antenna forms interference
  • the i-th first cancellation signal uses the i-th first cancellation signal to cancel the interference signal of the i-th receiving antenna in the transceiver antenna array to obtain the actual received signal of the i-th receiving antenna;
  • the i-th first cancellation signal has the same amplitude and opposite phase, and i is 1-n.
  • the performing frequency conversion processing on the second transmission signal to obtain the first cancellation signal includes:
  • the second cancellation signal set includes n second cancellation signals
  • the cancellation antenna array obtains a second cancellation signal set according to the third transmission signal;
  • the frequency is determined according to the antenna size reduction factor and the frequency of the second transmission signal;
  • the antenna size reduction factor is determined by dividing the size of the transceiver antenna array by the size of the cancellation antenna array.
  • the obtaining a second cancellation signal set according to the third transmission signal includes:
  • the scattering parameter matrix of the cancellation antenna array is multiplied by the third transmission signal to obtain the second cancellation signal set; the scattering parameter matrix of the cancellation antenna array and the scattering parameter matrix of the transceiver antenna array are in each Corresponding operating frequencies are the same or have a multiple relationship, and the scattering parameter matrix of the transceiver antenna array is multiplied by the first transmission signal to generate an interference signal set, and the interference signal set includes n interference signals.
  • the method before the i-th first cancellation signal is used to cancel the interference signal of the i-th receiving antenna in the transceiver antenna array, when the When the amplitude of the i first cancellation signal is not equal to the amplitude of the interference signal of the i-th receiving antenna, the method further includes:
  • the amplitude of the i-th first cancellation signal is adjusted so that the adjusted amplitude of the i-th first cancellation signal is equal to the amplitude of the interference signal of the i-th receiving antenna.
  • a radio frequency interference cancellation device is provided, the device is applied to the equipment described in the first aspect, and the device includes:
  • the receiving unit is configured to receive a radio frequency signal and divide the radio frequency signal into a first transmission signal and a second transmission signal.
  • the first transmission signal is transmitted through a corresponding transmission antenna in the transceiver antenna array and responds to the transmission antenna
  • Each receiving antenna in the array forms interference;
  • the processing unit is configured to perform frequency conversion processing on the second transmission signal to obtain a first cancellation signal set, where the first cancellation signal set includes n first cancellation signals, where n is the number of receiving antennas in the transceiver antenna array ;
  • the cancellation unit is configured to use the i-th first cancellation signal to cancel the interference signal of the i-th receiving antenna in the transceiver antenna array to obtain the actual received signal of the i-th receiving antenna; the i-th receiving antenna
  • the interference signal and the i-th first cancellation signal have the same amplitude and opposite phase, and i takes 1-n.
  • the processing unit includes:
  • An up-conversion sub-unit configured to up-convert the second transmission signal by using a local oscillator signal to obtain a third transmission signal
  • An obtaining subunit configured to obtain a second cancellation signal set according to the third transmission signal; the second cancellation signal set includes n second cancellation signals;
  • the down-conversion subunit is configured to down-convert the second cancellation signal in the second cancellation signal set by using the local oscillator signal to obtain a first cancellation signal set.
  • the acquiring subunit is specifically configured to obtain the second signal from the cancellation antenna array according to the third transmission signal.
  • Cancellation signal set; the frequency of the local oscillator signal is determined according to the antenna size reduction factor and the frequency of the second transmission signal;
  • the antenna size reduction factor is the size of the transceiver antenna array divided by the cancellation antenna array The size is ok.
  • the acquisition subunit is specifically configured to compare the scattering parameter matrix of the cancellation antenna array with the first The three transmitted signals are multiplied to obtain the second set of cancellation signals; the scattering parameter matrix of the cancellation antenna array and the scattering parameter matrix of the transceiver antenna array are the same or have a multiple relationship at their respective working frequencies, and the transceiver The scattering parameter matrix of the antenna array is multiplied by the first transmission signal to generate an interference signal set, and the interference signal set includes n interference signals.
  • the apparatus further includes:
  • the adjustment unit is configured to adjust the amplitude of the i-th first cancellation signal before executing the cancellation unit, so that the adjusted amplitude of the i-th first cancellation signal is equal to the amplitude of the interference signal of the i-th receiving antenna .
  • a computer-readable storage medium is provided, and a program is stored in the computer-readable storage medium.
  • the program can implement the radio frequency described in the second aspect. Methods of interference cancellation.
  • a communication device including: a processor and a memory;
  • the memory is used to store computer-readable instructions or computer programs, and the processor is used to read the computer-readable instructions to implement the radio frequency interference cancellation method as described in the second aspect.
  • the communication device includes a power dividing circuit, a cancellation circuit, a transceiver antenna array, and a combining circuit.
  • the power dividing circuit can divide the radio frequency signal into the radio frequency signal before being transmitted through the transmitting antenna in the transceiver antenna array.
  • the two signals are the first transmission signal and the second transmission signal.
  • the first transmission signal is transmitted through the transmitting antenna in the transmitting and receiving antenna array, and causes interference to each receiving antenna in the transmitting and receiving antenna array.
  • the second transmission signal enters the cancellation circuit, and the cancellation circuit performs frequency conversion processing on the second transmission signal to obtain a first cancellation signal set.
  • the first cancellation signal set includes n first cancellation signals.
  • the cancellation circuit can use the second transmission signal to generate a cancellation signal for canceling the interference signal of each receiving antenna, and realize the function of using one transmission signal to generate multiple cancellation signals.
  • the combining circuit uses each first cancellation signal to cancel the interference signal of the corresponding receiving antenna, thereby improving the quality of the signal received by each receiving antenna.
  • the communication device can obtain multiple first cancellation signals for the radio frequency signal of one transmitting antenna, and there is no need to arrange a cancellation circuit for the interference of each transmitting antenna to each receiving antenna, thereby reducing hardware complexity and realizing the interference of multiple antenna arrays. eliminate.
  • FIG. 1 is a schematic diagram of traditional radio frequency interference cancellation provided by an embodiment of the application
  • FIG. 2 is a structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 3 is a structural diagram of another communication device provided by an embodiment of this application.
  • FIG. 4 is a schematic diagram of a communication device provided by an embodiment of this application.
  • FIG. 5a is a schematic diagram of a transceiving antenna provided by an embodiment of this application.
  • FIG. 5b is a schematic diagram of a cancellation antenna provided by an embodiment of this application.
  • FIG. 6a is a simulation diagram of the amplitude of a transceiver antenna provided by an embodiment of the application.
  • FIG. 6b is a simulation diagram of a cancellation antenna amplitude provided by an embodiment of this application.
  • FIG. 6c is a phase simulation diagram of a transceiver antenna provided by an embodiment of this application.
  • FIG. 6d is a simulation diagram of a phase cancellation antenna provided by an embodiment of this application.
  • FIG. 7 is a flowchart of a method for eliminating radio frequency interference provided by an embodiment of the application.
  • FIG. 8 is an example diagram of an application scenario provided by an embodiment of the application.
  • FIG. 9 is an example diagram of another application scenario provided by an embodiment of the application.
  • FIG. 10 is an example diagram of yet another application scenario provided by an embodiment of this application.
  • FIG. 11 is a schematic diagram of a calibration offset signal provided by an embodiment of this application.
  • FIG. 12 is a structural diagram of a radio frequency interference cancellation device provided by an embodiment of the application.
  • FIG. 13 is a structural diagram of another communication device provided by an embodiment of this application.
  • a multi-antenna array Since in a multi-antenna array, there is interference between any two antennas, in order to solve the interference of the transmitting link to the receiving link in full-duplex communication, it is necessary to deal with the interference of each transmitting link to each receiving link. Construct a cancellation link to eliminate radio frequency interference. Compared with a single antenna, the radio frequency interference cancellation of a multi-antenna array is more complex.
  • the principle diagram of radio frequency interference cancellation shown in Fig. 1 is illustrated by taking one transmitting antenna TX and one receiving antenna as an example.
  • a part of the transmitted signal is coupled at the transmitting end (after the PA) (the signal is used to cancel the interference, that is, the cancel signal), and the signal passes through an interference cancellation circuit, which is composed of multiple delay lines, and each delay line has a fixed phase.
  • the attenuator with adjustable shift and amplitude adjusts the attenuation value of each attenuator to make the cancellation signal and the interference signal equal in amplitude and 180 degrees out of phase. Combining the two signals at the receiving end can cancel the interference signal.
  • an embodiment of the present application provides a communication device, which includes a power dividing circuit, a transceiver antenna array, a cancellation circuit, and a combining circuit.
  • the power dividing circuit divides the radio frequency signal into two signals into the first transmission signal and the second transmission signal.
  • the first transmission signal is transmitted through the transmitting antenna in the transmitting and receiving antenna array, and interferes with the signals received by each receiving antenna in the transmitting and receiving antenna array.
  • the cancellation circuit performs frequency conversion processing on the second transmission signal to obtain a first cancellation signal set, and the first cancellation signal set includes n first cancellation signals.
  • multiple first canceling signals can be obtained through the canceling circuit, so that the combining circuit uses the multiple first canceling signals to cancel the interference signals of the multiple receiving antennas in the transmitting and receiving antenna array, Obtain the actual received signal of each receiving antenna. It can be seen that not only can the radio frequency interference generated by the transmitting antenna to the receiving antenna be eliminated, but also there is no need to arrange an elimination circuit for the interference of each transmitting antenna to each receiving antenna, thereby reducing the hardware complexity and realizing the interference elimination of the multi-antenna array.
  • the device may include a power dividing circuit 201, a cancellation circuit 202, a combining circuit 203, and a transceiver antenna array 204.
  • the power dividing circuit 201 is used to divide the radio frequency signal into a first transmission signal and a second transmission signal.
  • the first transmission signal is transmitted through the corresponding transmitting antenna in the transmitting and receiving antenna array 204, and causes interference to each receiving antenna in the transmitting and receiving antenna array 204.
  • the power dividing circuit can divide the radio frequency signal into two paths. One of the signals is transmitted through the transmitting antenna in the transmitting and receiving antenna array, and the other signal enters the cancellation circuit.
  • the power dividing circuit can perform splitting processing on the radio frequency signals corresponding to each of the 4 transmitting antennas, and divide each radio frequency signal into a first transmission signal and a second transmission signal. Thus, multiple first transmission signals and multiple second transmission signals can be obtained.
  • the power dividing circuit 201 may include a power divider or a coupler.
  • the power dividing circuit 201 may be equally divided according to the power of the radio frequency signal and divided into the first transmission signal and the second transmission signal.
  • the power dividing circuit 201 includes a coupler, the radio frequency signal can be divided according to a preset ratio.
  • the specific functions of the power dividing circuit can also be implemented by other devices, which are not limited in this embodiment.
  • the cancellation circuit 202 is configured to perform frequency conversion processing on the second transmission signal to obtain a first cancellation signal set, and the first cancellation signal set includes n first cancellation signals.
  • the cancellation circuit after receiving the second transmission signal, performs frequency conversion processing on the second transmission signal to obtain a cancellation signal set.
  • the cancellation signal set may include n first cancellation signals. That is, the cancellation circuit may generate multiple first cancellation signals according to one second transmission signal, so as to cancel the interference signal of one transmission antenna to all the reception antennas.
  • the combining circuit 203 uses the i-th first cancellation signal in the cancellation signal set to cancel the interference signal of the i-th receiving antenna in the transceiver antenna array to obtain the actual received signal of the i-th receiving antenna.
  • the interference signal of the i-th receiving antenna has the same amplitude and opposite phase as the i-th first cancellation signal, and i is 1-n.
  • the combining circuit uses each first cancellation signal to cancel the interference signal of the corresponding receiving antenna, eliminate radio frequency interference, and obtain the actual received signal of the receiving antenna.
  • the first cancellation signal and the interference signal of the corresponding receiving antenna have the same amplitude and opposite phase, so as to ensure that the first cancellation signal can completely eliminate the interference signal.
  • the communication device needs to have a phase shift function, by which the phase difference between the first cancellation signal and the interference signal is 180° or an integer multiple of 180°, that is The two are opposite in phase.
  • the phase shifting function can be realized by any circuit in the communication device, or can be realized by a separate phase shifting circuit, which is not limited in this embodiment.
  • the phase-shifting circuit can be arranged between the power division circuit and the cancellation circuit, or between the cancellation circuit and the combining circuit. The position of the phase-shifting circuit in this embodiment is here Not limited.
  • the communication device includes a power dividing circuit, a cancellation circuit, a transceiver antenna array, and a combining circuit.
  • the power dividing circuit can transmit the radio frequency signal through the transmitting antenna in the transceiver antenna array.
  • the radio frequency signal is divided into two signals, namely the first transmission signal and the second transmission signal.
  • the first transmission signal is transmitted through the transmitting antenna in the transmitting and receiving antenna array, and causes interference to each receiving antenna in the transmitting and receiving antenna array.
  • the second transmission signal enters the cancellation circuit, and the cancellation circuit performs frequency conversion processing on the second transmission signal to obtain a first cancellation signal set.
  • the first cancellation signal set includes n first cancellation signals.
  • the cancellation circuit can use the second transmission signal to generate a cancellation signal for canceling the interference signal of each receiving antenna, and realize the function of using one transmission signal to generate multiple cancellation signals.
  • the combining circuit uses each first cancellation signal to cancel the interference signal of the corresponding receiving antenna, thereby improving the quality of the signal received by each receiving antenna.
  • the communication device can obtain multiple first cancellation signals for the radio frequency signal of one transmitting antenna, and there is no need to arrange a cancellation circuit for the interference of each transmitting antenna to each receiving antenna, and the hardware complexity is reduced.
  • the hardware complexity is reduced by N 2 It will be N (N is the number of transmitting and receiving antennas) to realize the interference cancellation of the multi-antenna array.
  • the cancellation circuit 202 may include an up-conversion circuit 2021, a cancellation antenna array 2022, and a down-conversion circuit 2023, as shown in FIG. 3.
  • the up-conversion circuit 2021 is configured to use the local oscillator signal to up-convert the second transmission signal to obtain the third transmission signal. That is, the up-conversion circuit performs an up-conversion operation on the second transmission signal, moves the frequency of the second transmission signal to a high frequency, and obtains the third transmission signal. That is, the third transmission signal and the second transmission signal include the same information, and only the frequency of the third transmission signal is greater than that of the second transmission signal.
  • the local oscillator signal is multiplied by the second transmission signal to obtain the third transmission signal. It should be noted that, for each second transmission signal, the up-conversion circuit may use the same local oscillator signal to perform up-conversion processing on all the second transmission signals.
  • the antenna size is determined by the wavelength of the signal, the longer the wavelength, the larger the corresponding antenna size, and the signal wavelength is inversely proportional to the signal frequency.
  • the second transmission signal is up-converted to increase the frequency of the third transmission signal, thereby reducing the wavelength of the third transmission signal, and thereby reducing the size of the cancellation antenna in the cancellation antenna array. Therefore, when the size of the transceiver antenna in the transceiver antenna array and the size of the cancellation antenna in the cancellation antenna array are determined, the frequency of the local oscillator signal can be determined. Specifically, the frequency of the local oscillator signal is determined according to the antenna size reduction factor and the frequency of the second transmission signal.
  • f 0 X*ff.
  • the cancellation antenna array 2022 is configured to obtain a second cancellation signal set according to the third transmission signal, where the second cancellation signal set includes n second cancellation signals.
  • the cancellation antenna array can obtain a second cancellation signal set according to the high-frequency signal, that is, the third transmission signal, and the second cancellation signal set can include n second cancellation signals.
  • the cancellation antenna array is used to multiply the scattering parameter matrix of the cancellation antenna array with the third transmission signal to obtain the second cancellation signal set.
  • the scattering parameter matrix of the canceling antenna array and the scattering parameter matrix of the transmitting and receiving antenna array are the same at their respective working frequencies or there is a multiple relationship, and the scattering parameter matrix of the transmitting and receiving antenna array is multiplied by the first transmission signal to generate an interference signal set.
  • the interference signal set includes interference signals formed by the first transmission signal on each receiving antenna.
  • the cancellation antenna of the cancellation antenna array has the same physical structure as the transceiver antenna in the transceiver antenna array, and the cancellation antenna and the transceiver antenna work in the same working state at their respective operating frequencies, so that the scattering parameter matrix of the cancellation antenna array is The scattering parameter matrix of the transmitting and receiving antenna array is equal or there is a multiple relationship, and then the canceling antenna array can reconstruct the interference signal generated by the transmitting and receiving antenna, and then shift the phase to make the canceling signal and the interference signal have the same amplitude and the phase difference is 180°, and the radio frequency is eliminated. interference.
  • the up-converted signal needs to be down-converted. , Thereby reducing to the original frequency, that is, the second cancellation signal needs to be down-converted through the down-conversion circuit.
  • the down-conversion circuit 2023 is configured to use the local oscillator signal to down-convert the second cancellation signal in the second cancellation signal set to obtain the first cancellation set. That is, the frequencies of the first cancellation signal and the corresponding interference signal in the first cancellation set are the same.
  • this embodiment can increase the frequency of the second transmission signal by performing an up-conversion operation on the second transmission signal, thereby reducing the size of the cancellation antenna in the cancellation antenna array, thereby reducing the space occupied by the communication device.
  • the scattering parameter matrix of the cancellation antenna and the transceiver antenna can only be kept consistent at one frequency point, which has a certain impact on the bandwidth of interference cancellation.
  • the transceiver antenna array includes 4 transmitting antennas and 4 receiving antennas as an example for description.
  • the transmitting ports corresponding to the 4 transmitting antennas are named: Tx1, Tx2, Tx3, Tx4;
  • the receiving ports corresponding to the 4 receiving antennas are named: Rx1, Rx2, Rx3, Rx4.
  • the corresponding radio frequencies of the 4 transmitting antennas The signal enters the power dividing circuit 201, and is divided into a first transmission signal and a second transmission signal. Among them, the first transmission signal is transmitted to the corresponding transmission port, and the second transmission signal enters the up-conversion circuit 2021.
  • the up-conversion circuit 2021 uses the local oscillator signal provided by the local oscillator source to perform up-conversion processing on the second transmission signal to obtain the third transmission signal.
  • a signal is transmitted, and the third transmission signal is transmitted to the corresponding transmitting port in the cancellation antenna array 2022.
  • the third transmit signal After the third transmit signal enters the transmit port, it is the same as the transmit port in the transceiver antenna array. A part of the energy is sent out, and a small part of the energy arrives at the receiving port to form an interference signal, that is, the second cancellation signal.
  • the second canceling interference signal is subjected to down-conversion processing in the down-conversion circuit 2023, and the second canceling signal is phase-shifted to obtain the first canceling signal, that is, the first canceling signal and the interference signal are opposite in phase and equal in amplitude.
  • the first cancellation signal is used to cancel the corresponding interference signal to obtain the actual received signal corresponding to each receiving antenna.
  • the number of transmitting antennas and receiving antennas in the transceiver antenna array may be equal or different, which is not limited in this embodiment.
  • FIGS 5a and 5b show two patch antenna arrays. Each patch antenna array contains 4 antenna elements. The physical structure of the two antenna arrays is the same, but the antenna of Figure 5b is compared to the antenna of Figure 5a. The size is reduced by 3 times.
  • the area of the metal floor is 300*300mm
  • the area of the patch is 43.2mm*36mm
  • the height from the metal floor is 6mm
  • the area of the metal floor is 100mm*100mm
  • the area of the patch It is 14.4mm*12mm
  • the height from the metal floor is 2mm.
  • the respective scattering parameter matrix S is obtained by simulating the two antennas, and the simulation results are shown in Figs. 6a-6d.
  • Figs. 6a and 6b are amplitude simulation parameters
  • Figs. 6c and 6d are phase simulation parameters. It can be seen from the above simulation results that the center frequency of antenna a is 3.5 GHz, and the center frequency of antenna b is 10.5 GHz. It can be seen from Table 1 and Table 2 that at the corresponding frequencies, the simulated scattering parameter matrix of the antenna of Fig. 5a is the same as that of the antenna of Fig. 5b, including the amplitude and phase of the scattering parameter matrix. Therefore, under the condition that the scattering parameter matrix remains unchanged, the size of the cancellation antenna is reduced by 3 times, the three-dimensional volume can be reduced by 27 times, and the volume occupied by the cancellation antenna is greatly reduced.
  • this embodiment is not only valid for patch antennas, but is also applicable to other types of antennas under the premise of ensuring that the antenna is placed in the same-sex space.
  • the strength of the first transmit signal transmitted to the transceiver antenna array is usually much greater than the strength of the second transmit signal transmitted to the cancellation circuit. That is, the amplitude of the second transmission signal is much smaller than the amplitude of the first transmission signal. In this way, the amplitude of the first cancellation signal obtained is smaller than the amplitude of the corresponding interference signal.
  • the amplitude of the frequency conversion signal may be introduced, resulting in a different amplitude between the first cancellation signal and the corresponding interference signal. To ensure that the amplitude of the first cancellation signal is the same as the amplitude of the corresponding interference signal, the amplitude of the first cancellation signal is adjusted before the first cancellation signal is used to cancel the interference signal.
  • the communication device may further include a gain amplifying circuit for adjusting the i-th first cancellation signal when the amplitude of the i-th first cancellation signal is not equal to the amplitude of the interference signal of the i-th receiving antenna.
  • the amplitude of the cancellation signal is equal to the amplitude of the interference signal of the i-th receiving antenna. That is, the gain amplifying circuit may be located before the canceling circuit and the combining circuit, and before the combining circuit uses the first canceling signal to cancel the interference signal, the gain amplifying circuit first adjusts the amplitude of the first canceling signal.
  • the communication device may further include a local oscillator source, and the local oscillator source is used to provide a local oscillator signal for the up-conversion circuit or a local oscillator signal for the down-conversion circuit.
  • the communication device may also include a band-pass filter, which is used for the third transmission signal. Filtering is performed, and the filtered third transmission signal is sent to the cancellation antenna array.
  • the cancellation antenna array can be placed in a shielding box. In order not to affect the working state of the cancellation antenna, a absorbing material can be attached in the shielding box.
  • FIG. 7 is a flowchart of a method for eliminating radio frequency interference provided by an embodiment of the application. As shown in FIG. 7, the method may include:
  • S701 Receive a radio frequency signal, and divide the radio frequency signal into a first transmission signal and a second transmission signal.
  • the radio frequency signal is divided into two signals, namely the first transmission signal and the second transmission signal.
  • the first transmission signal is transmitted through the corresponding transmitting antenna in the transmitting and receiving antenna array, and causes interference to each receiving antenna in the transmitting and receiving antenna array. That is, after the first transmission signal enters the corresponding transmitting port in the transceiver antenna array, a part of the signal is sent out through the transmitting antenna, and a small part of the signal arrives at the receiving port to interfere with the signal of the receiving antenna, that is, an interference signal.
  • S702 Perform frequency conversion processing on the second transmission signal to obtain a first cancellation signal set, where the first cancellation signal set includes n first cancellation signals.
  • the first cancellation signal set may include n first cancellation signals, where n is the number of receiving antennas in the transceiver antenna array. . That is, multiple cancellation signals can be obtained through one second transmission signal, so that multiple interference signals can be cancelled at one time.
  • performing frequency conversion processing on the second transmission signal to obtain the first cancellation signal can be implemented through the following steps:
  • the local oscillator signal is multiplied by the second transmission signal, and the multiplied high frequency signal is extracted, and the high frequency signal is the third transmission signal. That is, the second transmission signal is moved to a high frequency by the local oscillator signal.
  • the second cancellation signal set is obtained from the cancellation antenna array according to the third transmission signal, where the frequency of the local oscillator signal is determined according to the antenna size reduction factor and the frequency of the second transmission signal; the antenna size reduction factor is determined by the transceiver antenna The size of the array divided by the size of the offset antenna array is determined. That is, the frequency of the local oscillator signal is determined by the reduction factor of the cancellation antenna relative to the size of the transmitting and receiving antenna.
  • the second cancellation signal set can be obtained according to the third transmission signal, and the second cancellation signal set can include n second cancellation signals, where n is the number of receiving antennas in the transceiver antenna array.
  • obtaining the second cancellation signal set according to the third transmission signal includes: multiplying the scattering parameter matrix of the cancellation antenna array by the third transmission signal to obtain the second cancellation signal set.
  • the scattering parameter matrix of the cancellation antenna array is the same as the scattering parameter matrix of the transceiver antenna array, and the scattering parameter matrix of the transceiver antenna array is multiplied by the first transmission signal to generate an interference signal set, and the interference signal set includes n interference signals.
  • n is the number of receiving antennas in the transceiver antenna array, that is, one transmission signal can cause interference to all receiving antennas.
  • the scattering parameter matrix of the transceiver antenna array is determined by the signal entering the transmitting port and the signal output from the receiving port, which will be specifically described in subsequent embodiments.
  • the second cancellation signal is multiplied by the local oscillator signal to extract the low-frequency signal, that is, the first cancellation signal.
  • S703 Use the i-th first cancellation signal to cancel the interference signal of the i-th receiving antenna in the transceiver antenna array to obtain the actual received signal of the i-th receiving antenna.
  • the first cancellation signal can be used to cancel the interference signal of the corresponding receiving antenna, so as to obtain the actual received signal received by the receiving antenna.
  • the interference signal of the i-th receiving antenna has the same amplitude and opposite phase as the i-th first cancellation signal, and i is 1-n.
  • the amplitude of the first cancellation signal is not equal to the amplitude of the interference signal before combining. Then the amplitude of the first cancellation signal can be adjusted. Specifically, the amplitude of the i-th first cancellation signal is adjusted so that the adjusted amplitude of the i-th first cancellation signal is equal to the amplitude of the interference signal of the i-th receiving antenna.
  • the radio frequency interference cancellation method divides the radio frequency signal into two signals, namely the first transmission signal and the second transmission signal, before the radio frequency signal is transmitted through the transmitting antenna in the transmitting and receiving antenna array.
  • the first transmission signal is transmitted through the transmission antenna in the transceiver antenna array, and causes interference to each receiving antenna.
  • the second transmission signal is subjected to frequency conversion processing to obtain the first cancellation signal set, that is, multiple first cancellation signals can be reconstructed for one radio frequency signal, and the multiple first cancellation signals can be used to cancel the interference signals of multiple receiving antennas to improve each receiving The quality of the signal received by the antenna.
  • each scattering parameter in the scattering parameter matrix of the transceiver antenna array is equal to the signal output by the receiving port divided by the signal entering the transmitting port.
  • the scattering parameter matrix of the transmitting and receiving antenna array includes n*n scattering parameters, and each scattering parameter can be calculated by the following formula:
  • a Txj transmit port j represents an input signal
  • b Rxi i represents an output port of the received signal.
  • each radio frequency signal is divided into two signals, namely the first transmission signal and the second transmission signal, as shown in formula (3) :
  • an represents the radio frequency signal corresponding to the nth transmit port
  • a up Txn represents the first transmission signal divided by the nth radio frequency signal
  • a down Txn represents the second transmission signal divided by the nth radio frequency signal.
  • first transmission signal and the second transmission signal can be expressed as:
  • the interference signal b up Rxi received by the receiving port i is:
  • the transceiver antenna array is receiving signals at the same time as transmitting signals. Therefore, in addition to receiving interference signals, the receiving port has signals that actually need to be received, that is, the actual received signals;
  • the second transmission signal enters the up-conversion circuit for up-conversion processing. Specifically, it can be multiplied by a sine signal.
  • the frequency of the sine signal is f 0
  • the third transmission signal frequency f′ f+f 0 obtained after up-conversion is obtained.
  • the second transmission signal is up-converted, it can not only cause a change in the frequency of the second transmission signal, but also a change in the amplitude of the second transmission signal, which is equivalent to multiplying the amplitude of the second signal by a constant.
  • the third transmission signal obtained can be expressed as:
  • the working state is the same as that of the transceiver antenna array. That is, part of the energy will be emitted, and a small part of the energy will reach the receiving port of the cancellation antenna to form interference. Since the scattering parameter matrix of the cancellation antenna array is equal to the scattering parameter matrix of the transceiver antenna array, the generated second cancellation signal set can be expressed as:
  • the first set of cancellation signals can be expressed as:
  • the interference signal generated by the transceiver antenna array and the cancellation signal generated by the cancellation antenna array are eliminated in the combining circuit. Since the scattering parameter matrix of the canceling antenna array and the transmitting and receiving antenna array are the same, and the transmitted signal is the same or different by a fixed multiple, the interference of the transmitting port to the receiving port is also the same or different by a fixed multiple, which will cancel the interference signal output by the antenna receiving port. Processing, make the amplitude of the interference signal output by the receiving port of the receiving and receiving antenna and the canceling antenna equal, and the phase difference is 180° (or an integer multiple of 180°), and then combine, the output signal of the combiner is:
  • the scattering parameter matrix of the transmitting and receiving antenna array is equal to the scattering parameter matrix of the canceling antenna array as an example for description.
  • the scattering parameter matrix of the transceiver antenna array and the scattering parameter matrix of the cancellation antenna array may have a multiple relationship.
  • FIG. 4 is taken as an example for description. That is to say, the description will be made by taking the example that the transceiver antenna array includes 4 transmitting ports and 4 receiving ports.
  • the RF signal enters the power divider circuit and is divided into two signals, which can be expressed as:
  • a up Txj j-th transmission signal of the first radio frequency signal corresponding to, a down Txj j-th transmission signal of the second radio frequency signal corresponding to the relation between them can be expressed as:
  • the interference signal received by each receiving port can be expressed as:
  • the set of interference signals received by all receiving ports can be expressed as:
  • each receiving port receives the interference signal, it also receives the external signal sent by the external device to the receiving port, that is, the actual received signal, then the total signal received by the receiving port is:
  • the amplitude of the third sending signal is:
  • the third transmission signal enters the cancellation antenna array to obtain the second cancellation signal set, which can be expressed as:
  • the first cancellation signal set can be expressed as:
  • the transceiver antenna is used to transmit and receive signals
  • the cancellation antenna is used to generate cancellation signals
  • the interference signals on the transceiver antennas are cancelled.
  • the circulator is a unidirectional 3-port device. It is generally used for antenna multiplexing. For example, the signal from port 2 can only be output from port 3, and the signal from port 3 can only be output from port 1. Therefore, port 2 is generally connected to the output link, port 3 is connected to the transmitting antenna, and port 1 is connected to the receiving link.
  • the circulator expands an antenna port into a transmitting port (circulator port 2) and a receiving port (circulator port 1).
  • complete isolation cannot be achieved between ports 2 and 1, and the isolation is generally 30-40dB. Therefore, part of the transmitted signal will leak from port 2 to port 1 and interfere with the received signal.
  • the radio frequency signal is output through the radio frequency transmission link, assuming the frequency is f, and then enters the power divider for power division.
  • the signal is generally divided into unequal power.
  • the signal on the transmitting and receiving antenna is much larger than the signal on the canceling antenna, so the power divider can also be replaced with a directional coupler.
  • the power division ratio of each power divider or directional coupler must be consistent.
  • the signal passes through the power divider, one signal enters the 2 ports of the circulator, and then is transmitted through the transceiver antenna to form effective signal radiation. At the same time, due to the limited isolation of the circulator, part of the signal leaks from the 2 port to the 1 port.
  • the other signal is first upconverted through a mixer. Assuming that the frequency of the local oscillator source is f0, the frequency of the signal becomes f+f0 after mixing, and then the signal enters the cancellation antenna through the circulator, and the same part of the signal is transmitted After being transmitted, a small part of the signal passes through the coupling of the circulator and the antenna to output the coupled signal at the 2 ports of the circulator, and the frequency of the coupled signal is still f+f0. Then this signal is passed through a mixer for down-conversion processing, and the frequency is changed back to f.
  • the interference signal formed by the cancellation antenna is the same or only a fixed multiple of the interference signal formed on the transceiver antenna. Then adjust the amplitude and phase of the cancellation signal through the adjustable phase shifter (PA) and variable gain amplifier (VGA, Variable Gain Amplifier) to make it equal to the interference signal amplitude and opposite in phase. In the combiner Combine the two signals to complete the cancellation of all interference signals.
  • PA phase shifter
  • VGA variable gain amplifier
  • the S-parameter matrix of the cancellation antenna and the transceiver antenna at their respective operating frequencies be the same, but the circulator connected to it also needs to have the same S-parameter matrix in their respective operating frequency bands.
  • the receiving and transmitting share the antenna, and the transmitting and receiving signals are isolated through a circulator.
  • the transceiver antenna adopts a separate antenna form, and other modules and implementations Example 1 is the same.
  • Using separate antennas for transmitting and receiving will more than double the antenna aperture, but the transmitting and receiving antennas do not need to be isolated by a circulator, which can greatly save the hardware cost (generally, the hardware cost of the circulator is much higher than the antenna cost).
  • the isolation of the transmitting and receiving antenna is improved, and combined with the radio frequency cancellation of this solution, a better interference elimination effect can be achieved.
  • the adjustment of the cancellation signal is basically fixed, such as fixed phase shift and gain.
  • a certain error will be introduced, which will affect the offset depth.
  • Figure 10 shows another scenario embodiment.
  • An adjustable phase shifter and an adjustable gain amplifier are added to the cancellation signal to adjust the amplitude and phase of the cancellation signal to make it consistent with the amplitude of the interference signal, and the phase difference is 180 degrees.
  • the interference signal can also be adjusted.
  • a signal can be transmitted from the baseband, after D/A conversion, up-conversion, and RF amplifiers are converted into a power RF signal.
  • the signal enters the full-duplex transceiver unit and outputs a residual signal after interference cancellation at the output.
  • the signal passes through the receiving link, passes through a low noise amplifier (LNA), down-conversion, and A/D sampling is finally sent to the baseband for processing.
  • LNA low noise amplifier
  • the baseband adjusts the phase of the adjustable phase shifter and the gain value of the adjustable gain amplifier according to a certain algorithm, so that the received residual interference signal amplitude is minimized.
  • the process of interference cancellation is actually the process of adding and subtracting vector signals, as shown in Figure 11.
  • the phase shifter is used to adjust the signal phase.
  • Other phase adjustment methods are also applicable. For example, you can use multiple delay lines (fixed time delay), and then adjust the amplitude of each signal, and the effect of phase modulation can also be achieved.
  • the above calibration can minimize the interference signal in the transceiver unit, that is, the interference of the transmitting channel 1 to the receiving channel 1.
  • the S-parameter matrix of the transceiver antenna and the cancellation antenna are the same, the cancellation signal vector is only a fixed multiple of the interference signal vector after up-conversion, so the relative amplitude and phase between different interferences are the same. While the internal interference is minimized, the interference between other antennas is also minimized. Calibrate the transceiver unit in turn to minimize all interference. Therefore, the calibration process of this scheme also has linear complexity.
  • the communication equipment and radio frequency interference cancellation method provided in this application can not only be used in full-duplex radio frequency interference cancellation, but also can be used to reduce the coupling interference between the unit antennas in the antenna array, that is, all antennas that require low mutual coupling All scenes of the array can be used.
  • the technical method provided in this application can also be used in a full-duplex radar system. In some scenarios, the radar system needs to send and receive signals at the same time, and the coupling between the receiving and sending antennas has a certain impact on the performance of the radar.
  • the solution provided in this application It is possible to reduce the coupling between the antennas without increasing the antenna aperture, effectively reducing the interference of the transmitted signal to the received signal.
  • the present application also provides a radio frequency interference cancellation device, which will be described below with reference to the accompanying drawings.
  • FIG. 12 is a structural diagram of a radio frequency interference cancellation device provided by an embodiment of the application. As shown in FIG. 12, the device may include:
  • the receiving unit 1201 is configured to receive a radio frequency signal and divide the radio frequency signal into a first transmission signal and a second transmission signal. Each receiving antenna in the antenna array forms interference;
  • the processing unit 1202 is configured to perform frequency conversion processing on the second transmission signal to obtain a first cancellation signal set.
  • the first cancellation signal set includes n first cancellation signals, where n is the number of receiving antennas in the transceiver antenna array. Quantity
  • the cancellation unit 1203 is configured to use the i-th first cancellation signal to cancel the interference signal of the i-th receiving antenna in the transceiver antenna array to obtain the actual received signal of the i-th receiving antenna;
  • the interference signal of the antenna has the same amplitude and opposite phase as the i-th first cancellation signal, and i is 1-n.
  • the processing unit includes:
  • An up-conversion sub-unit configured to up-convert the second transmission signal by using a local oscillator signal to obtain a third transmission signal
  • An obtaining subunit configured to obtain a second cancellation signal set according to the third transmission signal; the second cancellation signal set includes n second cancellation signals;
  • the down-conversion subunit is configured to down-convert the second cancellation signal in the second cancellation signal set by using the local oscillator signal to obtain a first cancellation signal set.
  • the acquisition subunit is specifically configured to obtain a second set of cancellation signals from the cancellation antenna array according to the third transmission signal; the frequency of the local oscillator signal is reduced according to the antenna size and the reduction factor.
  • the frequency of the second transmission signal is determined; the antenna size reduction factor is determined by dividing the size of the transceiver antenna array by the size of the cancellation antenna array.
  • the acquisition subunit is specifically configured to multiply the scattering parameter matrix of the cancellation antenna array by the third transmission signal to obtain the second cancellation signal set; the cancellation The scattering parameter matrix of the antenna array and the scattering parameter matrix of the transmitting and receiving antenna array are the same at their respective working frequencies or have a multiple relationship, and the scattering parameter matrix of the transmitting and receiving antenna array is multiplied by the first transmission signal to generate an interference signal Set, the set of interference signals includes n interference signals.
  • the device further includes:
  • the adjustment unit is configured to adjust the amplitude of the i-th first cancellation signal before executing the cancellation unit, so that the adjusted amplitude of the i-th first cancellation signal is equal to the amplitude of the interference signal of the i-th receiving antenna .
  • the embodiments of the present application also provide a computer-readable storage medium.
  • the computer-readable storage medium stores a program.
  • the program can realize the radio frequency when read and executed by one or more processors. Methods of interference cancellation.
  • FIG. 13 is a schematic structural diagram of a communication device 1000 provided by an embodiment of the present application.
  • a communication device 1000 such as a user plane function UPF unit or a device with a similar functional unit.
  • the communication device 1000 includes: a processor 1001 and a memory 1002, where the memory 1002 can be independent of the processor or independent of the network device (Memory #3), and can also be within the processor or network device (Memory # 1 and Memory #2).
  • the storage 1002 may be a physically independent unit, or may be a storage space on a cloud server, a network hard disk, or the like.
  • the memory 1002 is used to store computer readable instructions (or called computer programs),
  • the processor 1001 is configured to read the computer-readable instructions to implement the aforementioned method for eliminating radio frequency interference.
  • the memory 1002 (Memory #1) is located in the device.
  • the memory 1002 (Memory #2) is integrated with the processor.
  • the memory 1002 (Memory #3) is located outside the device.
  • the communication device further includes a transceiver 1003 for receiving and sending data.
  • the processor 1001 may be a central processing unit, a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the disclosure of this application.
  • the processor may also be a combination that implements computing functions, for example, a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and so on.
  • the memory 1002 may include: volatile memory (volatile memory), such as random-access memory (random-access memory, RAM); and the memory may also include non-volatile memory (non-volatile memory), such as flash memory. Flash memory, hard disk drive (HDD) or solid-state drive (SSD), cloud storage, network attached storage (NAS: network attached Storage), network drive (network drive) ), etc.; the memory may also include a combination of the above-mentioned types of memory or any other medium or product with a storage function.
  • At least one (item) refers to one or more, and “multiple” refers to two or more.
  • “And/or” is used to describe the association relationship of associated objects, indicating that there can be three types of relationships, for example, “A and/or B” can mean: only A, only B, and both A and B , Where A and B can be singular or plural.
  • the character “/” generally indicates that the associated objects before and after are in an “or” relationship.
  • the following at least one item (a) or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a).
  • At least one of a, b, or c can mean: a, b, c, "a and b", “a and c", “b and c", or "a and b and c" ", where a, b, and c can be single or multiple.
  • the steps of the method or algorithm described in combination with the embodiments disclosed herein can be directly implemented by hardware, a software module executed by a processor, or a combination of the two.
  • the software module can be placed in random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disks, removable disks, CD-ROMs, or all areas in the technical field. Any other known storage media.

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Abstract

本申请实施例公开了一种通信设备、射频干扰消除方法及装置，其中，通信设备包括功分电路、抵消电路、收发天线阵列以及合路电路。功分电路在射频信号通过发送天线进行发射之前，将射频信号分为两路信号，分别为第一发送信号和第二发送信号。其中，第一发送信号经过收发天线阵列中的发送天线发送，并对收发天线阵列中的各个接收天线形成干扰。第二发送信号进入抵消电路，由抵消电路对第二发送信号进行变频处理，获得第一抵消信号集合。即，抵消电路可以利用第二发送信号生成用于抵消每个接收天线的干扰信号的抵消信号，实现利用一个发送信号生成多个抵消信号功能。合路电路利用每个第一抵消信号对对应的接收天线的干扰信号进行抵消。

Description

一种通信设备、射频干扰消除方法及装置
本申请要求于2019年9月20日提交中国专利局、申请号为201910893571.5、申请名称为“一种通信设备、射频干扰消除方法及装置”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
本申请涉及通信技术领域，具体涉及一种通信设备、射频干扰消除方法及装置。
背景技术
全双工通信一直以来都是通信领域研究的热点，但是由于发送和接收链路工作在相同的时频资源上，使得发送链路对接收链路会产生强烈的干扰。其中，发送链路对接收链路产生的干扰可以包括收发射频电路之间的耦合干扰，收发天线之间的近场耦合干扰和由反射物引起的回波干扰等。
其中，射频电路之间的耦合干扰时延最小，一般在几个纳秒，可以通过在电路板上增加屏蔽措施和吸波材料降低。当天线距离反射物比较远时，由反射引起的回波干扰强度一般比较小，可以在数字域进行消除。但是发送天线和接收天线一般距离比较近，甚至共用天线，会产生强烈的近场耦合干扰，严重影响接收信号的正常接收，因此，降低收发天线之间的近场耦合干扰是实现全双工通信面临的首要问题。
发明内容
有鉴于此，本申请实施例提供一种通信设备、射频干扰消除方法及装置，以实现消除进场耦合干扰，提高接收信号的质量。
为解决上述问题，本申请实施例提供的技术方案如下：
第一方面，提供了一种通信设备，所述设备包括：功分电路、收发天线阵列，抵消电路以及合路电路；所述功分电路，用于将射频信号划分为第一发送信号和第二发送信号；所述第一发送信号通过所述收发天线阵列中对应的发送天线发送，并对所述收发天线阵列中的各个接收天线形成干扰；所述抵消电路，用于对所述第二发送信号进行变频处理，获得第一抵消信号集合，所述第一抵消信号集合包括n个第一抵消信号，n为所述收发天线阵列中接收天线的数量；所述合路电路，用于利用第i个第一抵消信号对所述收发天线阵列中的第i个接收天线的干扰信号进行抵消，获得第i个接收天线的实际接收信号；所述第i个接收天线的干扰信号与所述第i个第一抵消信号幅度相等、相位相反，i取1-n。即，抵消电路可以利用第二发送信号生成用于抵消每个接收天线的干扰信号的抵消信号，实现利用一个发送信号生成多个抵消信号功能。合路电路利用每个第一抵消信号对对应的接收天线的干扰信号进行抵消，提高每个接收天线所接收信号的质量。
结合第一方面，在第一方面的第一种可能的实现方式中，所述抵消电路包括：上变频电路、抵消天线阵列和下变频电路；所述上变频电路，用于利用本振信号对所述第二发送信号进行上变频，获得第三发送信号；所述抵消天线阵列，用于根据所述第三发送信号获得第二抵消信号集合；所述第二抵消信号集合中包括n个第二抵消信号；所述下变频电路，用于利用所述本振信号对所述第二抵消信号集合中的第二抵消信号 进行下变频，获得第一抵消信号集合。在该实施方式中，通过对第二发送信号进行上变频操作，获得第三发送信号，提高第三发送信号的发射频率，从而降低第三发送信号的波长，进而减小抵消天线阵列中抵消天线的尺寸。
结合第一方面的第一种可能的实现方式，在第一方面的第二种可能的实现方式中，所述本振信号的频率是根据天线尺寸缩小倍数以及所述第二发送信号的频率确定；所述天线尺寸缩小倍数是由所述收发天线阵列的天线尺寸除以所述抵消天线阵列的天线尺寸确定的。在该实施方式中，在确定了天线尺寸缩小倍数以及第二发送信号的频率后，可以确定出本振信号，进而可以将第二发送信号的频率提高至指定的高频上进行传输。
结合第一方面的第一种可能的实现方式，在第一方面的第三种可能实现方式中，所述抵消天线阵列，具体用于将所述抵消天线阵列的散射参数矩阵与所述第三发送信号相乘，获得所述第二抵消信号集合；所述抵消天线阵列的散射参数矩阵与所述收发天线阵列的散射参数矩阵在各自对应的工作频率上相同或者存在倍数关系；所述收发天线阵列的散射参数矩阵与所述第一发送信号相乘生成干扰信号集合，所述干扰信号集合中包括第一发送信号对各个接收天线所形成的干扰信号。在该实施方式中，抵消天线阵列的抵消天线与收发天线阵列中的收发天线物理结构相同，且抵消天线与收发天线在各自的工作频点上工作状态相同，从而使得抵消天线阵列的散射参数矩阵与收发天线阵列的散射参数矩阵相等或者存在倍数关系，进而抵消天线阵列可以对收发天线所产生的干扰信号进行重建，再通过移相，使得抵消信号与干扰信号幅度相等，相位相差180°，消除射频干扰。
结合第一方面，在第一方面的第四种可能的实现方式中，所述设备还包括：增益放大电路；所述增益放大电路，用于当第i个第一抵消信号的幅度与第i个接收天线的干扰信号的幅度不相等时，调整第i个第一抵消信号的幅度，以与第i个接收天线的干扰信号的幅度相等。在该实施方式中，为保证第一抵消信号的幅度与接收信号中对应干扰信号的幅度相等，以实现完全消除，可以调整第一抵消信号的幅度，以使得第一抵消信号的幅度与干扰信号的幅度相等。
结合第一方面的第一种可能的实现方式，在第一方面的第五种可能的实现方式中，所述设备还包括：本振源；所述本振源，用于为所述上变频电路提供所述本振信号。在该实施方式中，可以利用本振源为上变频电路提供本振信号，以实现对第二发送信号进行上变频处理。
第二方面，提供了一种射频干扰消除方法，所述方法应用于第一方面所述的设备，所述方法包括：
接收射频信号，并将所述射频信号划分为第一发送信号和第二发送信号，所述第一发送信号通过收发天线阵列中对应的发送天线发送，并对所述收发天线阵列中的各个接收天线形成干扰；
对所述第二发送信号进行变频处理，获得第一抵消信号集合，所述第一抵消信号集合包括n个第一抵消信号，n为所述收发天线阵列中接收天线的数量；
利用第i个第一抵消信号对所述收发天线阵列中的第i个接收天线的干扰信号进行抵消，获得第i个接收天线的实际接收信号；所述第i个接收天线的干扰信号与所述第i个第一抵消信号幅度相等、相位相反，i取1-n。
结合第二方面，在第二方面的第一种可能的实现方式中，所述对所述第二发送信号进行变频处理，获得第一抵消信号，包括：
利用本振信号对所述第二发送信号进行上变频，获得第三发送信号；
根据所述第三发送信号获得第二抵消信号集合；所述第二抵消信号集合包括n个第二抵消信号；
利用所述本振信号对所述第二抵消信号集合中的第二抵消信号进行下变频，获得第一抵消信号集合。
结合第二方面的第一种可能的实现方式，在第二方面的第二种可能的实现方式中，抵消天线阵列根据所述第三发送信号获得第二抵消信号集合；所述本振信号的频率根据天线尺寸缩小倍数以及所述第二发送信号的频率确定；所述天线尺寸缩小倍数是由所述收发天线阵列的尺寸除以所述抵消天线阵列的尺寸确定的。
结合第二方面的第一种可能的实现方式，在第二方面的第三种可能的实现方式中，所述根据所述第三发送信号获得第二抵消信号集合，包括：
将所述抵消天线阵列的散射参数矩阵与所述第三发送信号相乘，获得所述第二抵消信号集合；所述抵消天线阵列的散射参数矩阵与所述收发天线阵列的散射参数矩阵在各自对应的工作频率上相同或者存在倍数关系，所述收发天线阵列的散射参数矩阵与所述第一发送信号相乘生成干扰信号集合，所述干扰信号集合中包括n个干扰信号。
结合第二方面，在第二方面的第四种可能的实现方式中，在利用第i个第一抵消信号对所述收发天线阵列中的第i个接收天线的干扰信号进行抵消之前，当第i个第一抵消信号的幅度与第i个接收天线的干扰信号的幅度不相等时，所述方法还包括：
调整第i个第一抵消信号的幅度，以使调整后的第i个第一抵消信号的幅度与第i个接收天线的干扰信号的幅度相等。
第三方面，提供了一种射频干扰消除装置，所述装置应用于第一方面所述的设备，所述装置包括：
接收单元，用于接收射频信号，并将所述射频信号划分为第一发送信号和第二发送信号，所述第一发送信号通过收发天线阵列中对应的发送天线发送，并对所述收发天线阵列中的各个接收天线形成干扰；
处理单元，用于对所述第二发送信号进行变频处理，获得第一抵消信号集合，所述第一抵消信号集合包括n个第一抵消信号，n为所述收发天线阵列中接收天线的数量；
抵消单元，用于利用第i个第一抵消信号对所述收发天线阵列中的第i个接收天线的干扰信号进行抵消，获得第i个接收天线的实际接收信号；所述第i个接收天线的干扰信号与所述第i个第一抵消信号幅度相等、相位相反，i取1-n。
结合第三方面，在第三方面的第一种可能的实现方式中，所述处理单元，包括：
上变频子单元，用于利用本振信号对所述第二发送信号进行上变频，获得第三发送信号；
获取子单元，用于根据所述第三发送信号获得第二抵消信号集合；所述第二抵消信号集合包括n个第二抵消信号；
下变频子单元，用于利用所述本振信号对所述第二抵消信号集合中的第二抵消信号进行下变频，获得第一抵消信号集合。
结合第三方面的第一种可能的实现方式，在第三方面的第二种可能的实现方式中，所述获取子单元，具体用于由抵消天线阵列根据所述第三发送信号获得第二抵消信号集合；所述本振信号的频率根据天线尺寸缩小倍数以及所述第二发送信号的频率确定；所述天线尺寸缩小倍数是由所述收发天线阵列的尺寸除以所述抵消天线阵列的尺寸确定的。
结合第三方面的第二种可能的实现方式，在第三方面的第三种可能的实现方式中，所述获取子单元，具体用于将所述抵消天线阵列的散射参数矩阵与所述第三发送信号相乘，获得所述第二抵消信号集合；所述抵消天线阵列的散射参数矩阵与所述收发天线阵列的散射参数矩阵在各自对应的工作频率上相同或者存在倍数关系，所述收发天线阵列的散射参数矩阵与所述第一发送信号相乘生成干扰信号集合，所述干扰信号集合中包括n个干扰信号。
结合第三方面，在第三方面的第四种可能的实现方式中，所述装置还包括：
调整单元，用于在执行所述抵消单元之前，调整第i个第一抵消信号的幅度，以使调整后的第i个第一抵消信号的幅度与第i个接收天线的干扰信号的幅度相等。
第四方面，提供了一种计算机可读存储介质，所述计算机可读存储介质中存储程序，所述程序在被一个或多个处理器读取并执行时可实现第二方面所述的射频干扰消除的方法。
第五方面，提供了一种通信设备，包括：处理器，存储器；
所述存储器用于存储计算机可读指令或者计算机程序，所述处理器用于读取所述计算机可读指令以实现如第二方面所述的射频干扰消除方法。
由此可见，本申请实施例具有如下有益效果：
本申请实施例提供的通信设备包括功分电路、抵消电路、收发天线阵列以及合路电路，其中，功分电路可以在射频信号通过收发天线阵列中的发送天线进行发射之前，将射频信号分为两路信号，分别为第一发送信号和第二发送信号。其中，第一发送信号经过收发天线阵列中的发送天线发送，并对收发天线阵列中的各个接收天线形成干扰。第二发送信号进入抵消电路，由抵消电路对第二发送信号进行变频处理，获得第一抵消信号集合，该第一抵消信号集合包括n个第一抵消信号。即，抵消电路可以利用第二发送信号生成用于抵消每个接收天线的干扰信号的抵消信号，实现利用一个发送信号生成多个抵消信号功能。合路电路利用每个第一抵消信号对对应的接收天线的干扰信号进行抵消，提高每个接收天线所接收信号的质量。
另外，该通信设备可以针对一个发送天线的射频信号，获得多个第一抵消信号， 无需针对每个发送天线对每个接收天线的干扰布置抵消电路，降低硬件复杂度，实现多天线阵列的干扰消除。
附图说明
为了更清楚地说明本发明具体实施方式或现有技术中的技术方案，下面将对具体实施方式或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施方式，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的传统射频干扰消除原理图；
图2为本申请实施例提供的一种通信设备结构图；
图3为本申请实施例提供的另一种通信设备结构图；
图4为本申请实施例提供的一种通信设备示意图；
图5a为本申请实施例提供的一种收发天线示意图；
图5b为本申请实施例提供的一种抵消天线示意图；
图6a为本申请实施例提供的一种收发天线幅度仿真图；
图6b为本申请实施例提供的一种抵消天线幅度仿真图；
图6c为本申请实施例提供的一种收发天线相位仿真图；
图6d为本申请实施例提供的一种抵消天线相位仿真图；
图7为本申请实施例提供的一种射频干扰消除方法的流程图；
图8为本申请实施例提供的一种应用场景示例图；
图9为本申请实施例提供的另一种应用场景示例图；
图10为本申请实施例提供的又一种应用场景示例图；
图11为本申请实施例提供的一种校准抵消信号示意图；
图12为本申请实施例提供的一种射频干扰消除装置结构图；
图13为本申请实施例提供的另一种通信设备结构图。
具体实施方式
为了使本技术领域的人员更好地理解本发明方案，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分的实施例，而不是全部的实施例。基于本发明中的实施例，都应当属于本发明保护的范围。
为便于理解本申请的具体实现，下面将先对本申请的背景技术进行说明。
由于在多天线阵列中，任意两个天线之间都有干扰，为解决全双工通信中发送链路对接收链路的干扰，需要针对每个发送链路对每个接收链路的干扰，构建抵消链路，以消除射频干扰。相比单天线，多天线阵列的射频干扰消除的复杂度较高。如图1所示的射频干扰消除原理图，以1个发射天线TX和1个接收天线为例进行说明。在发射端(PA之后)耦合出一部分发射信号(该信号用于抵消干扰，即抵消信号)，该信号经过一个干扰消除电路，该电路由多路延迟线组成，每路延迟线拥有固定的相移和幅度可调的衰减器，调节每一路衰减器的衰减值，使抵消信号与干扰信号幅度相等，相位相差180度，在接收端对两路信号合路 既可抵消干扰信号。当扩展到多天线时，由于在多天线阵列中，任意一个发射天线对所有的接收天线均产生干扰，因此，每个发射天线与每个接收天线之间均需布置一个消除电路，相比于单天线，多天线的干扰消除复杂度更高。
然而，随着多输入多输出(multiple-Input multiple-Output，MIMO)技术的发展，未来全双工通信技术将和MIMO天线阵列相结合，提高通信质量。当利用图1所示的消除原理对MIMO天线阵列进行射频干扰消除时，复杂度将急剧上升，使得消除设备占用大量空间，而且无法完全消除多天线之间的射频干扰，影响消除效果。
基于此，本申请实施例提供了一种通信设备，该设备包括功分电路、收发天线阵列，抵消电路以及合路电路。其中，在射频信号通过收发天线模块的发送天线发射之前，功分电路将射频信号划分两路信号分别为第一发送信号和第二发送信号。其中，第一发送信号通过收发天线阵列中的发送天线发射，并对收发天线阵列中的各个接收天线所接收的信号形成干扰。对于划分的另一路信号，即第二发送信号，抵消电路对该第二发送信号进行变频处理，获得第一抵消信号集合，该第一抵消信号集合中包括n个第一抵消信号。也就是，针对一个发送天线的射频信号，通过抵消电路，可以获得多个第一抵消信号，从而合路电路利用该多个第一抵消信号去抵消收发天线阵列中多个接收天线的干扰信号，获得每个接收天线的实际接收信号。可见，不仅可以消除发送天线对接收天线产生的射频干扰，而且无需针对每个发送天线对每个接收天线的干扰布置消除电路，降低硬件复杂度，实现多天线阵列的干扰消除。
下面结合附图，通过实施例来详细说明本申请实施例中一种射频干扰消除方法和通信设备的各种非限定性具体实现方式。
设备实施例：
参见图2，该图为本申请实施例提供的一种通信设备结构示意图，如图2所示，该设备可以包括功分电路201、抵消电路202、合路电路203以及收发天线阵列204。
其中，功分电路201，用于将射频信号划分为第一发送信号和第二发送信号。其中，第一发送信号通过收发天线阵列204中对应的发送天线发送，并对收发天线阵列204中的各个接收天线形成干扰。
本实施例中，针对收发天线阵列中任一发送天线对应的射频信号，功分电路均可以将该射频信号分成两路，其中一路信号通过收发天线阵列中发送天线发射，另一路信号进入抵消电路。例如，当收发天线阵列包括4个发送天线时，功分电路可以针对4个发送天线各自对应的射频信号均进行分路处理，将每个射频信号划分为第一发送信号和第二发送信号，从而可以获得多个第一发送信号和多个第二发送信号。
在具体实现时，功分电路201可以包括功分器或耦合器，当功分电路201包括功分器时，可以根据射频信号的功率进行等分，划分成第一发送信号和第二发送信号。当功分电路201包括耦合器时，可以将射频信号按照预设比例进行划分。在实际应用时，功分电路的具体功能也可以通过其他器件进行实现，本实施例在此不做限定。
抵消电路202，用于对第二发送信号进行变频处理，获得第一抵消信号集合，该第一抵消信号集合包括n个第一抵消信号。
在本实施例中，抵消电路在接收到第二发送信号后，对第二发送信号进行变频处理，获得抵消信号集合，该抵消信号集合中可以包括n个第一抵消信号。也就是，抵消电路可以根据一路第二发送信号生成多个第一抵消信号，以用于抵消一个发送天线对所有接收天线的干扰信号。
合路电路203，利用抵消信号集合中的第i个第一抵消信号对收发天线阵列中的第i个接收天线的干扰信号进行抵消，获得第i个接收天线的实际接收信号。其中，第i个接收天线的干扰信号与第i个第一抵消信号幅度相等、相位相反，i取1-n。
本实施例中，合路电路利用每个第一抵消信号对对应的接收天线的干扰信号进行抵消，消除射频干扰，获得该接收天线的实际接收信号。其中，第一抵消信号与对应的接收天线的干扰信号幅度相等、相位相反，从而保证第一抵消信号可以将干扰信号完全消除。
可以理解的是，为保证第一抵消信号与干扰信号相位相反，则该通信设备需具备移相功能，通过移相使得第一抵消信号与干扰信号相位相差180°或180°的整数倍，即二者相位相反。在具体实现时，该移相功能可以通过该通信设备中任一电路实现，也可以通过单独的移相电路实现，本实施例在此不做限定。当通过单独的移相电路实现时，该移相电路可以布置在功分电路与抵消电路之间，也可以布置在抵消电路与合路电路之间，本实施例对于移相电路的位置在此不做限定。
通过上述描述可知，本实施例提供的通信设备包括功分电路、抵消电路、收发天线阵列以及合路电路，其中，功分电路可以在射频信号通过收发天线阵列中的发送天线进行发送之前，将射频信号分为两路信号，分别为第一发送信号和第二发送信号。其中，第一发送信号经过收发天线阵列中的发送天线发送，并对收发天线阵列中的各个接收天线形成干扰。第二发送信号进入抵消电路，由抵消电路对第二发送信号进行变频处理，获得第一抵消信号集合，该第一抵消信号集合包括n个第一抵消信号。即，抵消电路可以利用第二发送信号生成用于抵消每个接收天线的干扰信号的抵消信号，实现利用一个发送信号生成多个抵消信号功能。合路电路利用每个第一抵消信号对对应的接收天线的干扰信号进行抵消，提高每个接收天线所接收信号的质量。
另外，该通信设备可以针对一个发送天线的射频信号，获得多个第一抵消信号，无需针对每个发送天线对每个接收天线的干扰布置抵消电路，降低硬件复杂度，硬件复杂度由N 2将为N(N为收发天线数量)，实现多天线阵列的干扰消除。
在一种可能的实现方式中，抵消电路202可以包括上变频电路2021、抵消天线阵列2022以及下变频电路2023，如图3所示。
其中，上变频电路2021，用于利用本振信号对第二发送信号进行上变频，获得第三发送信号。即，上变频电路将第二发送信号进行上变频操作，将第二发送信号的频率移动至高频，获得第三发送信号。也就是，第三发送信号与第二发送信号的信号所包括的信息相同，仅第三发送信号的频率大于第二发送信号。在具体实现时，将本振信号与第二发送信号相乘，获得第三发送信号。需要说明的是，针对每个第二发送信号，上变频电路可以利用同一本振信号对所有的第二发送信号进行上变频处理。
可以理解的是，由于天线尺寸是由信号的波长决定的，波长越长，对应的天线尺寸越 大，而信号波长与信号频率成反比。为了减小抵消天线阵列尺寸，因此，对第二发送信号进行上变频处理，以提高第三发送信号的频率，从而降低第三发送信号的波长，进而减小抵消天线阵列中抵消天线的尺寸。因此，当收发天线阵列中收发天线尺寸以及抵消天线阵列中的抵消天线的尺寸均确定后，可以确定本振信号的频率。具体为，本振信号的频率是根据天线尺寸缩小倍数以及第二发送信号的频率确定的，天线尺寸缩小倍数是由收发天线阵列的天线尺寸除以抵消天线阵列的天线尺寸确定的。例如，抵消天线相比于收发天线尺寸缩小X倍，X为频率放大倍数，X＝(f+f 0)/f，其中，f为第二发送信号的频率，f 0为本振信号的频率，(f+f 0)为第三发送信号的频率。当X确定后，f 0＝X*f-f。
抵消天线阵列2022，用于根据第三发送信号获得第二抵消信号集合，其中，第二抵消信号集合中包括n个第二抵消信号。
本实施例中，抵消天线阵列可以根据高频信号即第三发送信号获得第二抵消信号集合，该第二抵消信号集合中可以包括n个第二抵消信号。
在具体实现时，抵消天线阵列，用于将抵消天线阵列的散射参数矩阵与第三发送信号相乘，获得第二抵消信号集合。其中，抵消天线阵列的散射参数矩阵与收发天线阵列的散射参数矩阵在各自对应的工作频率上相同或者存在倍数关系，收发天线阵列的散射参数矩阵与第一发送信号相乘生成干扰信号集合，该干扰信号集合中包括第一发送信号对各个接收天线所形成的干扰信号。
需要说明的是，抵消天线阵列的抵消天线与收发天线阵列中的收发天线物理结构相同，且抵消天线与收发天线在各自的工作频点上工作状态相同，从而使得抵消天线阵列的散射参数矩阵与收发天线阵列的散射参数矩阵相等或者存在倍数关系，进而抵消天线阵列可以对收发天线所产生的干扰信号进行重建，再通过移相，使得抵消信号与干扰信号幅度相等，相位相差180°，消除射频干扰。其中，关于利用抵消天线阵列的散射参数矩阵与第三发送信号生成第二抵消信号集合，以及利用收发天线阵列的散射参数矩阵与第一发送信号生成干扰信号集合的具体实现将在方法实施例进行说明。
可以理解的是，当通过上变频电路2021将信号进行移频，获得高频信号后，为使得后续获得的第一抵消信号可以与干扰信号进行抵消，还需将上变频的信号进行下变频处理，从而降至到原来频率，即需要通过下变频电路对第二抵消信号进行下变频处理。
具体地，下变频电路2023，用于利用本振信号对第二抵消信号集合中的第二抵消信号进行下变频，获得第一抵消集合。也就是，第一抵消集合中的第一抵消信号与对应的干扰信号的频率是相同的。
通过上述描述可知，本实施例可以通过对第二发送信号进行上变频操作，提高第二发送信号的频率，从而减小抵消天线阵列中抵消天线的尺寸，进而减小通信设备的占用空间。
另外需要说明的是，由于通过上变频之后，抵消天线和收发天线的散射参数矩阵只能在一个频点上保持一致，这对干扰消除的带宽有一定影响。
为便于理解本申请所提供的通信设备，参见图4所示的一种通信设备具体示意图，在该图中，以收发天线阵列包括4个发送天线和4个接收天线为例进行说明。其中，4个发送天线对应的发射端口分别命名为：Tx1，Tx2，Tx3，Tx4；4个接收天线对应的接收端口分别 命名为：Rx1，Rx2，Rx3，Rx4。4个发送天线各自对应的射频信号进入功分电路201，均被划分为第一发送信号和第二发送信号。其中，第一发送信号传输到对应的发射端口，第二发送信号进入上变频电路2021，该上变频电路2021利用本振源提供的本振信号对第二发送信号进行上变频处理，获得第三发送信号，该第三发送信号传输到抵消天线阵列2022中对应发射端口。第三发送信号进入发射端口之后，与收发天线阵列中的发射端口相同，一部分能量发送出去，一小部分能量到达接收端口形成干扰信号，即第二抵消信号。第二抵消干扰信号在下变频电路2023中进行下变频处理，以及再对第二抵消信号进行移相处理，获得第一抵消信号，即使得第一抵消信号与干扰信号相位相反、幅度相等，从而在合路电路203中，利用第一抵消信号对对应的干扰信号进行抵消，获得每个接收天线对应的实际接收信号。
需要说明的是，收发天线阵列中发射天线和接受天线的数量可以相等，也可以不等，本实施例在此不做限定。
为说明抵消天线和收发天线在各自工作频率的工作状态，以贴片天线(patch antenna)为例进行说明。如图5a和图5b示出两个贴片天线阵列，每个贴片天线阵列都含有4个天线单元，两个天线阵列的物理结构一致，但是图5b的天线相比于图5a的天线，尺寸缩小3倍。比如图5a中，金属地板的面积为300*300mm，贴片的面积为43.2mm*36mm，距离金属地板的高度为6mm，而图5b中，金属地板的面积为100mm*100mm，贴片的面积为14.4mm*12mm，距离金属地板的高度为2mm。
通过对两个天线仿真获得各自的散射参数矩阵S，由图6a-图6d所示的仿真结果，其中，图6a和图6b分别为幅度仿真参数，图6c和图6d分别为相位仿真参数。从上述仿真结果可以看出，天线a的中心频率为3.5GHz，天线b的中心频率为10.5GHz。通过表1和表2可以看出，在对应的频率上，图5a的天线和图5b的天线仿真的散射参数矩阵相同，包括散射参数矩阵的幅度和相位。因此在保证散射参数矩阵不变的情况下，抵消天线的尺寸缩小了3倍，三维体积可缩小27倍，抵消天线占用的体积大大减小。
表1 仿真散射参数幅度对比
Figure PCTCN2020110385-appb-000001
Figure PCTCN2020110385-appb-000002
表2 仿真散射参数相位对比
Figure PCTCN2020110385-appb-000003
需要说明的是，在保证天线置于各项同性空间中的前提下，本实施例不仅仅对贴片天线成立，对其它形式天线也是适用的。
在实际应用时，为不影响发送天线的发射信号功率，在利用功分电路划分射频信号时，通常传输到收发天线阵列的第一发送信号强度远大于传输到抵消电路的第二发送信号强度，也就是，第二发送信号的幅度远小于第一发送信号的幅度。这样，会使得获得第一抵消信号的幅度小于对应干扰信号的幅度。另外，在对第二发送信号进行变频处理时，可能引入变频信号的幅度导致第一抵消信号与对应的干扰信号幅度不同。为保证第一抵消信号的幅度与对应的干扰信号的幅度相同，在利用第一抵消信号抵消干扰信号之前，对第一抵消信号的幅度进行调整。
具体地，该通信设备还可以包括增益放大电路，该增益放大电路，用于当第i个第一抵消信号的幅度与第i个接收天线的干扰信号幅度不相等时，调整第i个第一抵消信号的幅度，以与第i个接收天线的干扰信号的幅度相等。即，该增益放大电路可以位于抵消电路与合路电路之前，在合路电路利用第一抵消信号抵消干扰信号之前，增益放大电路先对第一抵消信号的幅度调整。
在本实施例一种可能的实现方式中，该通信设备还可以包括本振源，该本振源用于为上变频电路提供本振信号或为下变频电路提供本振信号。
另外，在实际应用中，为避免在进行上变频操作时，所获得第三发送信号引入高次谐波，该通信设备还可以包括带通滤波器，该带通滤波器用于对第三发送信号进行滤波，并将滤波后的第三发送信号发送给抵消天线阵列。此外，为避免抵消天线阵列所发射的信号对其它设造成干扰，可以将抵消天线阵列置于屏蔽箱中。为不影响抵消天线的工作状态，可以在屏蔽盒内附着吸波材料。
方法实施例：
参见图7，该图为本申请实施例提供的一种射频干扰消除方法流程图，如图7所示，该方法可以包括：
S701：接收射频信号，并将射频信号划分为第一发送信号和第二发送信号。
本实施例中，对于收发天线阵列中每个发送天线对应的射频信号，将该射频信号划分为两路信号，分别为第一发送信号和第二发送信号。其中，第一发送信号通过收发天线阵列中对应的发送天线发送，并对收发天线阵列中的各个接收天线形成干扰。即，第一发送信号进入收发天线阵列中对应的发射端口后，一部分信号通过发送天线发送出去，一小部分信号到达接收端口对接收天线的信号形成干扰，即干扰信号。
S702：对第二发送信号进行变频处理，获得第一抵消信号集合，该第一抵消信号集合包括n个第一抵消信号。
本实施例中，针对每个第二发送信号均进行变频处理，以获得第一抵消信号集合，该第一抵消信号集合可以包括n个第一抵消信号，n为收发天线阵列中接收天线的数量。即，通过一个第二发送信号可以获得多个抵消信号，从而实现一次可以抵消多个干扰信号。
在一种可能的实现方式中，对第二发送信号进行变频处理，获得第一抵消信号，可以通过以下步骤实现：
1)利用本振信号对第二发送信号进行上变频，获得第三发送信号。
本实施例中，将本振信号与第二发送信号相乘，提取相乘后的高频信号，该高频信号即为第三发送信号。也就是，通过本振信号将第二发送信号移动至高频。
在具体实现时，由抵消天线阵列根据第三发送信号获得第二抵消信号集合，其中，本振信号的频率根据天线尺寸缩小倍数以及第二发送信号的频率确定；天线尺寸缩小倍数是由收发天线阵列的尺寸除以抵消天线阵列的尺寸确定的。即，本振信号的频率由抵消天线相对于收发天线尺寸缩小倍数确定。
2)根据第三发送信号获得第二抵消信号集合，该第二抵消信号集合包括n个第二抵消信号。
当获得第三发送信号后，可以根据第三发送信号获得第二抵消信号集合，该第二抵消信号集合中可以包括n个第二抵消信号，其中，n为收发天线阵列中接收天线的数量。
在具体实现时，根据第三发送信号获得第二抵消信号集合，包括：将抵消天线阵列的散射参数矩阵与第三发送信号相乘，获得第二抵消信号集合。其中，抵消天线阵列的散射参数矩阵与收发天线阵列的散射参数矩阵相同，收发天线阵列的散射参数矩阵与第一发送信号相乘生成干扰信号集合，该干扰信号集合中包括n个干扰信号。其中，n为收发天线阵列中接收天线的数量，即一个发送信号可以对所有接收天线造成干扰。
其中，收发天线阵列的散射参数矩阵由进入发射端口的信号以及从接收端口输出的信号确定，具体地将在后续实施例进行说明。
3)利用本振信号对第二抵消信号集合中的第二抵消信号进行下变频，获得第一抵消信号集合。
为保证可完全消除干扰信号，还需对第二抵消信号集合中的第二抵消信号进行下变频处理，从而获得第一抵消信号集合。具体为，将第二抵消信号与本振信号相乘，提取低频信号，即第一抵消信号。
S703：利用第i个第一抵消信号对收发天线阵列中的第i个接收天线的干扰信号进行抵消，获得第i个接收天线的实际接收信号。
本实施例中，当获取每个接收天线对应的第一抵消信号后，可以利用该第一抵消信号抵消对应接收天线的干扰信号，从而获得该接收天线所接收的实际接收信号。其中，第i个接收天线的干扰信号与第i个第一抵消信号幅度相等、相位相反，i取1-n。
可以理解的是，为保证第一抵消信号可以完全消除干扰信号，需确保第一抵消信号与干扰信号幅度相等，如果在进行合路之前，第一抵消信号的幅度与干扰信号的幅度不相等，则可以调整第一抵消信号的幅度。具体为，调整第i个第一抵消信号的幅度，以使调整后的第i个第一抵消信号的幅度与第i个接收天线的干扰信号的幅度相等。
通过上述实施例可知，本实施例提供的射频干扰消除方法，在射频信号通过收发天线阵列中的发送天线发送之前，将射频信号分为两路信号，即第一发送信号和第二发送信号。其中，第一发送信号经过收发天线阵列中的发送天线发送，并对各个接收天线形成干扰。第二发送信号进行变频处理，获得第一抵消信号集合，即针对一路射频信号可以重建多个第一抵消信号，并利用多个第一抵消信号抵消多个接收天线的干扰信号，提高每个接收天线所接收信号的质量。
为便于理解抵消信号和干扰信号的形成，以及本申请具体的抵消原理，下面将进行说明。
本实施例中，收发天线阵列的散射参数矩阵中每个散射参数等于接收端口输出的信号除以进入发射端口的信号。当收发天线阵列包括n个发射端口和n个接收端口，则收发天线阵列的散射参数矩阵共包括n*n个散射参数，则每个散射参数可以通过以下公式计算获得：
S Rxi,Txj＝b Rxi/a Txj        (1)
其中，a Txj表示发射端口j的输入信号，b Rxi表示接收端口i的输出信号。则收发天线阵列对应的散射参数矩阵为：
Figure PCTCN2020110385-appb-000004
当收发天线阵列包括n个发射端口时，则共存在n个射频信号，每个射频信号均被划分成两路信号，即第一发送信号和第二发送信号，具体如公式(3)所示：
Figure PCTCN2020110385-appb-000005
其中，an表示第n个发射端口对应的射频信号，a up Txn表示第n个射频信号划分的第一发送信号，a down Txn表示第n个射频信号划分的第二发送信号。
其中，第一发送信号与第二发送信号之间的关系可以表示为：
Figure PCTCN2020110385-appb-000006
其中，C 1>>1。
由于每个发射端口对任意一个接收端口均产生干扰，则接收端口i接收到的干扰信号b up Rxi为：
b up Rxi＝S Rxi,Tx1*a up Tx1+S Rxi,Tx2*a up Tx2+...+S Rxi,Txn*a up Txn       (5)
则所有接收端口接收到的所有干扰可以通过下述矩阵表示：
Figure PCTCN2020110385-appb-000007
对于全双工系统，收发天线阵列在发送信号的同时，也在接收信号，因此接收端口除了接收干扰信号还有实际需要接收的信号，即实际接收信号；
Figure PCTCN2020110385-appb-000008
其中，
Figure PCTCN2020110385-appb-000009
表示第n个接收端口对应的实际接收信号，
Figure PCTCN2020110385-appb-000010
表示第n个接收端口接收到的总信号。
第二发送信号进入上变频电路进行上变频处理，具体可以为与一个正弦信号相乘，正弦信号的频率为f 0，则上变频之后获得的第三发送信号频率f’＝f+f 0。对第二发送信号进行上变频处理时，不仅可以引起第二发送信号频率的变化，也可以引起第二发送信号幅度的变化，即相等于在第二信号幅度的基础上乘以一个常数，则经过上变频处理后，获得第三发送信号可以表示为：
Figure PCTCN2020110385-appb-000011
第三发送信号进入抵消天线阵列后，与收发天线阵列的工作状态相同。即一部分能量会发射出去，还有一小部分能量会到达抵消天线的接收端口形成干扰。由于抵消天线阵列的散射参数矩阵与收发天线阵列的散射参数矩阵相等，则生成的第二抵消信号集合可以表示为：
Figure PCTCN2020110385-appb-000012
由于经过抵消天线阵列生成的第二抵消信号集合中的第二抵消信号的频率依然为f’，为保证后续可以抵消干扰信号，还需将第二抵消信号进行下变频处理，经过下变频处理获得第一抵消信号集合可以表示为：
Figure PCTCN2020110385-appb-000013
最后，收发天线阵列产生的干扰信号和抵消天线阵列产生的抵消信号在合路电路进行消除。由于抵消天线阵列和收发天线阵列的散射参数矩阵相同，且发射信号相同或者差一个固定倍数，其发射端口对接收端口的干扰也相同或者差一个固定倍数，将抵消天线接收端口输出的干扰信号进行处理，使收发天线和抵消天线接收端口输出的干扰信号幅度相等，相位相差180°(或180°的整数倍)，然后进行合路，合路器的输出信号为：
Figure PCTCN2020110385-appb-000014
需要说明的是，本实施例中以收发天线阵列的散射参数矩阵与抵消天线阵列的散射参数矩阵相等为例进行说明的。当然，收发天线阵列的散射参数矩阵与抵消天线阵列的散射参数矩阵可以存在倍数关系。
为方便理解本申请的消除原理，以图4为例进行说明。即以收发天线阵列包括4个发射端口和4个接收端口为例进行说明。
1、收发天线阵列的散射参数矩阵：
Figure PCTCN2020110385-appb-000015
2、射频信号进入功分电路分成两路信号，可以表示为：
Figure PCTCN2020110385-appb-000016
其中，a up Txj为第j个射频信号对应的第一发送信号，a down Txj为第j个射频信号对应的第二发送信号，二者之间的关系可以表示为：
Figure PCTCN2020110385-appb-000017
3、每个接收端口所接收的干扰信号可以表示为：
b up Rxi＝S Rxi,Tx1*a up Tx1+S Rxi,Tx2*a up Tx2+S Rxi,Tx3*a up Tx3+S Rxi,Tx4*a up Tx4      (15)
则，所有接收端口所接收的干扰信号集合可以表示为：
Figure PCTCN2020110385-appb-000018
4、每个接收端口在接收干扰信号的同时，也接收外部设备发送给该接收端口的外部信号，即实际接收信号，则接收端口接收的总信号为：
Figure PCTCN2020110385-appb-000019
5、对第二发送信号进行上变频处理，获得第三发送信号，该第三发送信号的频率为f’＝f+f0，其中，f为第二发送信号频率，f0为本振信号的频率，则第三发送信号的幅度为：
Figure PCTCN2020110385-appb-000020
6、第三发送信号进入抵消天线阵列，获得第二抵消信号集合，可以表示为：
Figure PCTCN2020110385-appb-000021
7、对第二抵消信号集合中的第二抵消信号进行下变频处理，获得第一抵消信号集合，则第一抵消信号集合可以表示为：
Figure PCTCN2020110385-appb-000022
Figure PCTCN2020110385-appb-000023
8、对第一抵消信号集合中的第一抵消信号幅度以及相位调整，使得第一抵消信号与对应的干扰信号幅度相等、相位相反，则合路后的信号可以表示为：
Figure PCTCN2020110385-appb-000024
应用场景实施例
参见图8所示的一种应用场景示例图，可以包括收发天线，抵消天线，环形器，功分器，合路器，移相器，可调增益放大器，混频器，本振源等。收发天线用来发射和接收信号，抵消天线用来产生抵消信号，抵消收发天线上的干扰信号。环形器是一种单向导通的3端口器件，一般用来做天线的收发复用，比如从端口2进入的信号只能从端口3输出，从端口3进入的信号只能从端口1输出，所以一般将端口2接输出链路，端口3接发射天线，端口1接接收链路，因此环形器将一个天线端口扩展成发射端口(环形器端口2)和接收端口(环形器端口1)。但是端口2和1之间无法做到完全隔离，隔离度一般为30～40dB，因此会有部分发射信号由端口2泄露到端口1对接收信号形成干扰。
首先射频信号经过射频发射链路输出，假设频率为f，然后进入功分器进行功分。为了不影响发射机的效率，一般对信号进行非等分功分，比如收发天线上的信号远远大于抵消天线上信号，因此功分器也可以换成定向耦合器。需要指出的是，每路功分器或者定向耦合器的功分比例必须是一致的。该信号经过功分器，一路信号进入环形器的2端口，然后经过收发天线发射出去，形成有效的信号辐射，同时由于环形器的隔离度有限，部分信号从2端口泄露到1端口从而对接收端形成一定的干扰。而另一路信号首先经过混频器进行上变频，假设本振源的频率为f0，经过混频之后信号的频率变为f+f0，然后信号通过环形器进入到抵消天线，同样的部分信号发射被发射出去，然后一小部分信号通过环形器和天线的耦合在环形器的2端口输出耦合信号，耦合信号的频率依然是f+f0。然后再将此信号经过混频器，进行下变频处理，频率变回f。由于抵消天线的S参数矩阵在f+f0频率上与收发天线一致，因此抵消天线形成干扰信号(抵消信号)与收发天线上形成的干扰信号是相同的或者只差一个固定的倍数。然后再通过可调移相器(Phase shifter,PA)和可调增益放大器(VGA,Variable Gain Amplifier)调整抵消信号的幅度和相位，使其与干扰信号幅度相等，相位相反， 在合路器中将两路信号合路即可完成对所有干扰信号的抵消。
在本实施例中，不仅要求抵消天线和收发天线在各自工作频率的S参数矩阵相同，与其连接的环形器在各自的工作频带内也需要有相同S参数矩阵。
参见图9所示另一场景实施例，本实施例中，接收和发射共用天线，通过环形器进行发射和接收信号的隔离，实施例二中，收发天线采用分离的天线形式，其它模块与实施例一相同。采用收发分离的天线，虽然会使天线口径增加一倍以上，但是收发天线之间无需通过环形器进行隔离，可大大节省硬件成本(一般来说环形器的硬件成本远高于天线成本)。而且通过一定的天线设计，提高收发天线的隔离度，结合本方案的射频对消，可以取得更好的干扰消除效果。
上述两个实施例，对抵消信号的调节基本上是固定，比如固定的移相和增益，实际应用中，由于加工精度会引入一定的误差，影响抵消深度，为了达到最佳的抵消效果，参见图10所示又一种场景实施例，在抵消信号上增加可调移相器和可调增益放大器来调节抵消信号的幅度和相位，使其和干扰信号的幅度一致，相位相差180度，当然也可以对干扰信号进行调节。实际应用中，可由基带发射一个信号，经过D/A转换，上变频，射频放大器，变换成一个功率射频信号，该信号进入全双工收发单元，在输出端输出一个干扰消除之后的剩余信号，该信号经过接收链路，经过低噪声放大器(Low noise amplifier，LNA)，下变频，A/D采样最终到基带进行处理。基带根据一定的算法，调节可调移相器的相位，以及可调增益放大器的增益值，使接收到的剩余干扰信号幅度最小。
关于相位和幅度的调节算法，干扰消除的过程其实是矢量信号加减的过程，如图11所示。首先有一个干扰信号，调节移相器的相位，使基带观测到的剩余干扰信号幅度最小，然后再调节放大器的增益，再使基带观测到的剩余干扰信号幅度最小，由于该最小值问题是一个凸问题，此时得到的剩余干扰信号就是全局最小值，对应的移相器和增益放大器的值也是最优解。图11中采用移相器调节信号相位，其它相位调节的方法也同样适用，比如可以用多路延时线(固定时延)，然后调节每一路信号的幅度，同样可以达到调相的效果。
以上校准能将收发单元内的干扰信号降到最低，即发射通道1对接收通道1的干扰。但由于收发天线和抵消天线的S参数矩阵相同，抵消信号向量经过上下变频之后，与干扰信号向量只相差一个固定的倍数，因此不同干扰之间的相对幅度和相位都是一样的，将收发单元内的干扰降低最低的同时，其它天线之间的干扰也被降到最低。依次对收发单元进行校准，即可使所有干扰降低最低。因此本方案校准过程同样拥有线性复杂度。
可以理解的是，本申请提供的通信设备以及射频干扰消除方法不仅可以用在全双工射频干扰消除，也可以用于降低天线阵列中单元天线之间的耦合干扰，即所有需要低互耦天线阵列的场景均可以使用。另外，本申请提供的技术方法还可以用在全双工雷达系统中，在一些场景下，雷达系统需要同时收发信号，收发天线之间的耦合对雷达性能产生一定的影响，本申请提供的方案可以在不增加天线孔径的情况下，降低天线之间的耦合，有效境地发射信号对接收信号的干扰。
装置实施例
基于上述方法实施例，本申请还提供了一种射频干扰消除装置，下面将结合附图对该 装置进行说明。
参见图12，该图为本申请实施例提供的一种射频干扰消除装置结构图，如图12所示，该装置可以包括：
接收单元1201，用于接收射频信号，并将所述射频信号划分为第一发送信号和第二发送信号，所述第一发送信号通过收发天线阵列中对应的发送天线发送，并对所述收发天线阵列中的各个接收天线形成干扰；
处理单元1202，用于对所述第二发送信号进行变频处理，获得第一抵消信号集合，所述第一抵消信号集合包括n个第一抵消信号，n为所述收发天线阵列中接收天线的数量；
抵消单元1203，用于利用第i个第一抵消信号对所述收发天线阵列中的第i个接收天线的干扰信号进行抵消，获得第i个接收天线的实际接收信号；所述第i个接收天线的干扰信号与所述第i个第一抵消信号幅度相等、相位相反，i取1-n。
在一种可能的实现方式中，所述处理单元，包括：
上变频子单元，用于利用本振信号对所述第二发送信号进行上变频，获得第三发送信号；
获取子单元，用于根据所述第三发送信号获得第二抵消信号集合；所述第二抵消信号集合包括n个第二抵消信号；
下变频子单元，用于利用所述本振信号对所述第二抵消信号集合中的第二抵消信号进行下变频，获得第一抵消信号集合。
在一种可能的实现方式中，所述获取子单元，具体用于由抵消天线阵列根据所述第三发送信号获得第二抵消信号集合；所述本振信号的频率根据天线尺寸缩小倍数以及所述第二发送信号的频率确定；所述天线尺寸缩小倍数是由所述收发天线阵列的尺寸除以所述抵消天线阵列的尺寸确定的。
在一种可能的实现方式中，所述获取子单元，具体用于将所述抵消天线阵列的散射参数矩阵与所述第三发送信号相乘，获得所述第二抵消信号集合；所述抵消天线阵列的散射参数矩阵与所述收发天线阵列的散射参数矩阵在各自对应的工作频率上相同或者存在倍数关系，所述收发天线阵列的散射参数矩阵与所述第一发送信号相乘生成干扰信号集合，所述干扰信号集合中包括n个干扰信号。
在一种可能的实现方式中，所述装置还包括：
调整单元，用于在执行所述抵消单元之前，调整第i个第一抵消信号的幅度，以使调整后的第i个第一抵消信号的幅度与第i个接收天线的干扰信号的幅度相等。
需要说明的是，本实施例中各个单元的实现可以参见上述方法实施例，本实施例在此不再赘述。
另外，本申请实施例还提供了一种计算机可读存储介质，所述计算机可读存储介质中存储程序，所述程序在被一个或多个处理器读取并执行时可实现所述的射频干扰消除的方法。
图13是本申请实施例提供的一种通信设备1000的结构示意图，如图13所示，一种通信设备1000，例如用户面功能UPF单元或类似功能单元的设备。该通信设备1000包括：处理 器1001，存储器1002，其中，存储器1002可以独立于处理器之外或独立于网络设备之外(Memory #3)，也可以在处理器或网络设备之内(Memory #1和Memory #2)。存储器1002可以是物理上独立的单元，也可以是云服务器上的存储空间或网络硬盘等。
所述存储器1002用于存储计算机可读指令(或者称之为计算机程序)，
所述处理器1001用于读取所述计算机可读指令以实现前述射频干扰消除的方法。
可选的，所述存储器1002(Memory #1)位于所述装置内。
可选的，所述存储器1002(Memory #2)与所述处理器集成在一起。
可选的，所述存储器1002(Memory #3)位于所述装置之外。
可选的，该通信设备还包括收发器1003，用于接收和发送数据。
另外，该处理器1001可以是中央处理器单元，通用处理器，数字信号处理器，专用集成电路，现场可编程门阵列或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，数字信号处理器和微处理器的组合等等。另外，该存储器1002可以包括：易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)；存储器也可以包括非易失性存储器(non-volatile memory)，例如快闪存储器(flash memory)，硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)、云存储(cloud storage)、网络附接存储(NAS：network attached Storage)、网盘(network drive)等；存储器还可以包括上述种类的存储器的组合或者其他具有存储功能的任意形态的介质或产品。
需要说明的是，本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。对于实施例公开的系统或装置而言，由于其与实施例公开的方法相对应，所以描述的比较简单，相关之处参见方法部分说明即可。
应当理解，在本申请中，“至少一个(项)”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，用于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：只存在A，只存在B以及同时存在A和B三种情况，其中A，B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b或c中的至少一项(个)，可以表示：a，b，c，“a和b”，“a和c”，“b和c”，或“a和b和c”，其中a，b，c可以是单个，也可以是多个。
还需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
结合本文中所公开的实施例描述的方法或算法的步骤可以直接用硬件、处理器执行的软件模块，或者二者的结合来实施。软件模块可以置于随机存储器(RAM)、内存、只读存储器(ROM)、电可编程ROM、电可擦除可编程ROM、寄存器、硬盘、可移动磁盘、CD-ROM、或技术领域内所公知的任意其它形式的存储介质中。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本申请。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本申请的精神或范围的情况下，在其它实施例中实现。因此，本申请将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (18)

  1. 一种通信设备，其特征在于，所述设备包括：功分电路、收发天线阵列，抵消电路以及合路电路；
    所述功分电路，用于将射频信号划分为第一发送信号和第二发送信号；所述第一发送信号通过所述收发天线阵列中对应的发送天线发送，并对所述收发天线阵列中的各个接收天线形成干扰；
    所述抵消电路，用于对所述第二发送信号进行变频处理，获得第一抵消信号集合，所述第一抵消信号集合包括n个第一抵消信号，n为所述收发天线阵列中接收天线的数量；
    所述合路电路，用于利用第i个第一抵消信号对所述收发天线阵列中的第i个接收天线的干扰信号进行抵消，获得第i个接收天线的实际接收信号；所述第i个接收天线的干扰信号与所述第i个第一抵消信号幅度相等、相位相反，i取1-n。
  2. 根据权利要求1所述的设备，其特征在于，所述抵消电路包括：上变频电路、抵消天线阵列和下变频电路；
    所述上变频电路，用于利用本振信号对所述第二发送信号进行上变频，获得第三发送信号；
    所述抵消天线阵列，用于根据所述第三发送信号获得第二抵消信号集合；所述第二抵消信号集合中包括n个第二抵消信号；
    所述下变频电路，用于利用所述本振信号对所述第二抵消信号集合中的第二抵消信号进行下变频，获得第一抵消信号集合。
  3. 根据权利要求2所述的设备，其特征在于，所述本振信号的频率是根据天线尺寸缩小倍数以及所述第二发送信号的频率确定；所述天线尺寸缩小倍数是由所述收发天线阵列的天线尺寸除以所述抵消天线阵列的天线尺寸确定的。
  4. 根据权利要求2所述的设备，其特征在于，所述抵消天线阵列，具体用于将所述抵消天线阵列的散射参数矩阵与所述第三发送信号相乘，获得所述第二抵消信号集合；所述抵消天线阵列的散射参数矩阵与所述收发天线阵列的散射参数矩阵在各自对应的工作频率上相同或者存在倍数关系；所述收发天线阵列的散射参数矩阵与所述第一发送信号相乘生成干扰信号集合，所述干扰信号集合中包括第一发送信号对各个接收天线所形成的干扰信号。
  5. 根据权利要求1所述的设备，其特征在于，所述设备还包括：增益放大电路；
    所述增益放大电路，用于当第i个第一抵消信号的幅度与第i个接收天线的干扰信号的幅度不相等时，调整第i个第一抵消信号的幅度，以与第i个接收天线的干扰信号的幅度相等。
  6. 根据权利要求2所述的设备，其特征在于，所述设备还包括：本振源；
    所述本振源，用于为所述上变频电路提供所述本振信号。
  7. 一种射频干扰消除方法，其特征在于，所述方法应用于权利要求1-6所述的设备，所述方法包括：
    接收射频信号，并将所述射频信号划分为第一发送信号和第二发送信号，所述第一发 送信号通过收发天线阵列中对应的发送天线发送，并对所述收发天线阵列中的各个接收天线形成干扰；
    对所述第二发送信号进行变频处理，获得第一抵消信号集合，所述第一抵消信号集合包括n个第一抵消信号，n为所述收发天线阵列中接收天线的数量；
    利用第i个第一抵消信号对所述收发天线阵列中的第i个接收天线的干扰信号进行抵消，获得第i个接收天线的实际接收信号；所述第i个接收天线的干扰信号与所述第i个第一抵消信号幅度相等、相位相反，i取1-n。
  8. 根据权利要求7所述的方法，其特征在于，所述对所述第二发送信号进行变频处理，获得第一抵消信号，包括：
    利用本振信号对所述第二发送信号进行上变频，获得第三发送信号；
    根据所述第三发送信号获得第二抵消信号集合；所述第二抵消信号集合包括n个第二抵消信号；
    利用所述本振信号对所述第二抵消信号集合中的第二抵消信号进行下变频，获得第一抵消信号集合。
  9. 根据权利要求8所述的方法，其特征在于，抵消天线阵列根据所述第三发送信号获得第二抵消信号集合；所述本振信号的频率根据天线尺寸缩小倍数以及所述第二发送信号的频率确定；所述天线尺寸缩小倍数是由所述收发天线阵列的尺寸除以所述抵消天线阵列的尺寸确定的。
  10. 根据权利要求9所述的方法，其特征在于，所述根据所述第三发送信号获得第二抵消信号集合，包括：
    将所述抵消天线阵列的散射参数矩阵与所述第三发送信号相乘，获得所述第二抵消信号集合；所述抵消天线阵列的散射参数矩阵与所述收发天线阵列的散射参数矩阵在各自对应的工作频率上相同或者存在倍数关系，所述收发天线阵列的散射参数矩阵与所述第一发送信号相乘生成干扰信号集合，所述干扰信号集合中包括n个干扰信号。
  11. 根据权利要求7所述的方法，其特征在于，在利用第i个第一抵消信号对所述收发天线阵列中的第i个接收天线的干扰信号进行抵消之前，当第i个第一抵消信号的幅度与第i个接收天线的干扰信号的幅度不相等时，所述方法还包括：
    调整第i个第一抵消信号的幅度，以使调整后的第i个第一抵消信号的幅度与第i个接收天线的干扰信号的幅度相等。
  12. 一种射频干扰消除装置，其特征在于，所述装置应用于权利要求1-6所述的设备，所述装置包括：
    接收单元，用于接收射频信号，并将所述射频信号划分为第一发送信号和第二发送信号，所述第一发送信号通过收发天线阵列中对应的发送天线发送，并对所述收发天线阵列中的各个接收天线形成干扰；
    处理单元，用于对所述第二发送信号进行变频处理，获得第一抵消信号集合，所述第一抵消信号集合包括n个第一抵消信号，n为所述收发天线阵列中接收天线的数量；
    抵消单元，用于利用第i个第一抵消信号对所述收发天线阵列中的第i个接收天线的干 扰信号进行抵消，获得第i个接收天线的实际接收信号；所述第i个接收天线的干扰信号与所述第i个第一抵消信号幅度相等、相位相反，i取1-n。
  13. 根据权利要求12所述的装置，其特征在于，所述处理单元，包括：
    上变频子单元，用于利用本振信号对所述第二发送信号进行上变频，获得第三发送信号；
    获取子单元，用于根据所述第三发送信号获得第二抵消信号集合；所述第二抵消信号集合包括n个第二抵消信号；
    下变频子单元，用于利用所述本振信号对所述第二抵消信号集合中的第二抵消信号进行下变频，获得第一抵消信号集合。
  14. 根据权利要求13所述的装置，其特征在于，所述获取子单元，具体用于由抵消天线阵列根据所述第三发送信号获得第二抵消信号集合；所述本振信号的频率根据天线尺寸缩小倍数以及所述第二发送信号的频率确定；所述天线尺寸缩小倍数是由所述收发天线阵列的尺寸除以所述抵消天线阵列的尺寸确定的。
  15. 根据权利要求14所述的装置，其特征在于，所述获取子单元，具体用于将所述抵消天线阵列的散射参数矩阵与所述第三发送信号相乘，获得所述第二抵消信号集合；所述抵消天线阵列的散射参数矩阵与所述收发天线阵列的散射参数矩阵在各自对应的工作频率上相同或者存在倍数关系，所述收发天线阵列的散射参数矩阵与所述第一发送信号相乘生成干扰信号集合，所述干扰信号集合中包括n个干扰信号。
  16. 根据权利要求12所述的装置，其特征在于，所述装置还包括：
    调整单元，用于在执行所述抵消单元之前，调整第i个第一抵消信号的幅度，以使调整后的第i个第一抵消信号的幅度与第i个接收天线的干扰信号的幅度相等。
  17. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储程序，所述程序在被一个或多个处理器读取并执行时可实现权利要求7至11任一项所述的射频干扰消除的方法。
  18. 一种通信设备，其特征在于，包括：处理器，存储器；
    所述存储器用于存储计算机可读指令或者计算机程序，所述处理器用于读取所述计算机可读指令以实现如权利要求7-11中任一项所述的射频干扰消除方法。
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