WO2024016708A1 - 感知方法、接收机及存储介质 - Google Patents

感知方法、接收机及存储介质 Download PDF

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Publication number
WO2024016708A1
WO2024016708A1 PCT/CN2023/083778 CN2023083778W WO2024016708A1 WO 2024016708 A1 WO2024016708 A1 WO 2024016708A1 CN 2023083778 W CN2023083778 W CN 2023083778W WO 2024016708 A1 WO2024016708 A1 WO 2024016708A1
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WIPO (PCT)
Prior art keywords
different times
multipath signal
environment
reflection path
reflection
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PCT/CN2023/083778
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English (en)
French (fr)
Inventor
陈诗军
李俊强
陈大伟
夏树强
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ZTE Corp
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ZTE Corp
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Priority to KR1020247033600A priority Critical patent/KR20240160187A/ko
Priority to US18/855,637 priority patent/US20250244439A1/en
Priority to EP23841783.6A priority patent/EP4492857A4/en
Publication of WO2024016708A1 publication Critical patent/WO2024016708A1/zh
Anticipated expiration legal-status Critical
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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0273—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves using multipath or indirect path propagation signals in position determination
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/003—Bistatic radar systems; Multistatic radar systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/46—Indirect determination of position data
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0205—Details
    • G01S5/0218—Multipath in signal reception
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0252—Radio frequency fingerprinting
    • G01S5/02521—Radio frequency fingerprinting using a radio-map
    • G01S5/02524—Creating or updating the radio-map
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/46—Indirect determination of position data
    • G01S2013/462—Indirect determination of position data using multipath signals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/46—Indirect determination of position data
    • G01S2013/466—Indirect determination of position data by Trilateration, i.e. two antennas or two sensors determine separately the distance to a target, whereby with the knowledge of the baseline length, i.e. the distance between the antennas or sensors, the position data of the target is determined

Definitions

  • Embodiments of the present application relate to but are not limited to the field of communications, and in particular, to a sensing method, a receiver and a storage medium.
  • wireless communication networks satisfy ubiquity, so realizing ubiquitous sensing through wireless communication networks has become the main feasible technical route.
  • Ubiquitous sensing needs to be able to realize sensing in various complex scenarios, such as multipath environments.
  • sensing in multipath environments there are currently few researches on sensing in multipath environments, and there are even fewer sensing technologies that can be commercialized.
  • the perception of multipath environments is still in the standardization and academic circles. All are research hotspots and are in the early stages of technological breakthroughs. Therefore, how to realize the perception of the current environment in a multipath environment has become an urgent technical problem to be solved.
  • Embodiments of the present application provide a sensing method, a receiver and a storage medium, which can utilize multipath signals to sense the current environment in a multipath environment.
  • embodiments of the present application provide a sensing method, including:
  • embodiments of the present application provide a receiver, including: a memory, a processor, and a computer program stored in the memory and executable on the processor.
  • the processor executes the computer program, the above mentioned steps are implemented.
  • embodiments of the present application provide a computer-readable storage medium that stores a computer-executable program.
  • the computer-executable program is used to cause a computer to execute the method described in the first aspect. Perception method.
  • Embodiments of the present application include: determining the arrival time and arrival angle of the multipath signal at different times based on the multipath signals received at different times; determining the reflection path attributes of the multipath signal at different times based on the arrival time and arrival angle at different times; According to the arrival time, arrival angle and reflection path attributes at different times, the perception results of the current environment at different times are obtained; based on the perception results at different times, it is determined whether the current environment has changed. That is to say, the multipath signals received at different times are analyzed and calculated to obtain the arrival time and arrival angle of the multipath signal at different times, and then the reflection of the multipath signal at different times is determined based on the arrival time and arrival angle at different times.
  • the sensing method of the present application analyzes multipath signals received at different times, thereby being able to use multipath signals to sense the current environment in a multipath environment.
  • Figure 1A is a schematic diagram of an implementation environment for executing a sensing method provided by an embodiment of the present application
  • Figure 1B is a flow chart of a sensing method provided by an embodiment of the present application.
  • Figure 2 is a schematic diagram of a multipath signal with a reflection path attribute of S1 provided by an embodiment of the present application
  • Figure 3 is a schematic diagram of a multipath signal with a reflection path attribute of S2 provided by an embodiment of the present application
  • Figure 4 is a schematic diagram of a multipath signal with a reflection path attribute of S3 provided by an embodiment of the present application
  • Figure 5 is a schematic diagram of position calculation between a target object, a transmitter and a receiver provided by an embodiment of the present application;
  • Figure 6 is a sub-flow chart of a sensing method provided by an embodiment of the present application.
  • Figure 7 is a sub-flow chart of a sensing method provided by another embodiment of the present application.
  • Figure 8 is a sub-flow chart of a sensing method provided by another embodiment of the present application.
  • Figure 9 is a sub-flow chart of a sensing method provided by another embodiment of the present application.
  • Figure 10 is a schematic diagram of a situation where a person is walking in a room and the positions at time Tn and time Tn+1 are inconsistent according to an embodiment of the present application;
  • Figure 11 is a schematic diagram of a situation where there is no one in the room at time Tn but there is someone in the room at time Tn+1 provided by an embodiment of the present application;
  • Figure 12 is a schematic structural diagram of a receiver provided by an embodiment of the present application.
  • Ubiquitous intelligent technology mainly includes ubiquitous sensing technology, ubiquitous computing technology, and product research and development. Therefore, ubiquitous intelligence requires a ubiquitous system.
  • wireless communication networks meet ubiquity. Therefore, realizing ubiquitous sensing and ubiquitous computing through wireless communication networks has become the main feasible technical route.
  • embodiments of the present application provide a sensing method, a receiver, and a computer-readable storage medium.
  • the sensing method of one embodiment determines the arrival time and arrival angle of the multipath signal at different times based on the multipath signals received at different times; determines the reflection path of the multipath signal at different times based on the arrival time and arrival angle at different times. Attributes; obtain the perception results of the current environment at different times based on the arrival time, arrival angle and reflection path attributes at different times; determine whether the current environment has changed based on the perception results at different times.
  • the multipath signals received at different times are analyzed and calculated to obtain the arrival times and angles of arrival of the multipath signals at different times, and then the arrival times and angles of arrival of the multipath signals at different times are determined based on the arrival times and angles of arrival at different times.
  • Reflection path attributes and based on the arrival time, arrival angle and reflection path attributes at different times, the perception results of the current environment at different times are obtained, and the perception results at the current moment are compared with the perception results at the previous moment to determine the current environment whether changes have occurred.
  • the sensing method of the present application analyzes multipath signals received at different times, thereby being able to use multipath signals to sense the current environment in a multipath environment.
  • FIG. 1A is a schematic diagram of an implementation environment for executing a sensing method provided by an embodiment of the present application.
  • the implementation environment includes a transmitter BS and a receiver BR, where the transmitter BS is responsible for transmitting multipath signals, and the receiver BR is responsible for receiving multipath signals.
  • the transmitter BS is responsible for transmitting multipath signals
  • the receiver BR is responsible for receiving multipath signals.
  • Direct diameter or no direct diameter.
  • the multipath signal received by the receiver BR may be a multipath signal reflected once by the environment, a multipath signal reflected once by a moving object in the environment, or a multipath signal reflected multiple times by the environment or moving objects.
  • multipath signals include but are not limited to dedicated sensing signals such as orthogonal frequency division multiplexing signals and chirp signals.
  • Figure 1A does not constitute a limitation on the embodiments of the present application, and may include more or less components than shown, or combine certain components, or different components. layout.
  • FIG. 1B a flow chart of a sensing method provided by an embodiment of the present application is shown.
  • the sensing method can be applied to the receiver, which includes but is not limited to receiving base stations and multi-antenna receivers.
  • the sensing method includes but is not limited to the following steps:
  • Step S101 Determine the arrival time and arrival angle of the multipath signal at different times based on the multipath signals received at different times;
  • Step S102 Determine the reflection path attributes of the multipath signal at different times according to the arrival time and angle of arrival at different times;
  • Step S103 Obtain the perception results of the current environment at different times based on the arrival time, arrival angle and reflection path attributes at different times;
  • Step S104 Determine whether the current environment has changed based on the sensing results at different times.
  • the multi-antenna receiver analyzes and calculates the multipath signals received at different times to obtain the arrival time and arrival angle of the multipath signals at different times. Then determine the reflection path attributes of the multipath signal at different times based on the arrival time and arrival angle at different times, and obtain the perception results of the current environment at different times based on the arrival time, arrival angle, and reflection path attributes at different times.
  • the perceptual knot Compare the result with the perception result at the previous moment to determine whether the current environment has changed. Based on this, compared with the existing technology, the sensing method of this application analyzes multipath signals received at different times, thereby being able to use multipath signals to sense the current environment in a multipath environment.
  • the transmitter transmits multipath signals at a set time Tn and wireless resources.
  • the receiver receives the multipath signal and calculates the arrival time ti and arrival angle ⁇ i of the multipath signal, where i is the number of multipaths that receive the multipath signal.
  • the reflection path attribute Si of the multipath signal is determined based on the decision condition classification map environment reflection path and the actual reflection path of the moving object. And calculate the actual physical reflection point position of the target object in the environment based on the arrival time ti and arrival angle ⁇ i of the multipath signal. Record the sensing results at Tn moment By comparing the perception result A Tn at the current moment with the perception result A Tn-1 at the previous moment, it is determined whether the current environment has changed.
  • wireless resources include but are not limited to time domain and frequency domain resources allocated in symbol units, subcarrier units, frame units, etc.
  • the transmitter and the receiver before the transmitter transmits the multipath signal, complete clock synchronization.
  • the completion of clock synchronization between the transmitter and the receiver means that the transmitter and the receiver have completed synchronization and achieved clock synchronization. Or, the transmitter and receiver have not completed synchronization. It is necessary to measure the clock difference, hardware link delay and other information of the transmitter and receiver, and calculate the synchronization correction amount.
  • the correction amount is used to correct the reception arrival time to realize the clock Synchronize. It should be noted that the arrival time ti in this application refers to the arrival time after correction.
  • the coordinates of the receiver are used as the origin, and a virtual straight line is drawn based on the arrival angle of the multipath signal received by the receiver.
  • the virtual straight line is connected to the first point of the building interface in the map environment.
  • the virtual intersection point is the reflection point position Pi of the multipath signal in the map environment.
  • P1, P2, P3, and P4 in Figure 1A are the reflection point positions of the multipath signal on the interface where the building wall is located in the map environment, where d i,1 is used to represent the reflection of the multipath signal in the map environment.
  • the distance from the point position coordinate Pi to the receiver BR, di ,2 is used to represent the distance from the reflection point position coordinate Pi of the multipath signal in the map environment to the transmitter BS, and i represents the number of each path signal in the multipath signal.
  • the reflection point position Pi can be a three-dimensional map coordinate (x, y, z).
  • the map environment includes, but is not limited to, building structures where known moving objects are located, objects placed in rooms, buildings or objects forming a map environment with a coordinate system.
  • the multi-antenna receiver receives multi-path signals reflected by objects in the environment to the multi-antenna receiver, and the multi-antenna receiver analyzes and calculates the time domain impulse response of the multi-path signals received by the multi-antennas.
  • the impulse response sequence determine the arrival time ti of the multipath signal, and the time interval corresponding to the impulse response of the arrival time ti of the distributed multipath signal, and then obtain multiple multipath signals based on the time interval corresponding to the impulse response of the arrival time ti
  • the antenna data analyzes the arrival angle ⁇ i of each path, where the arrival angle ⁇ i includes the pitch angle ⁇ and the azimuth angle
  • the distance from the reflection point position coordinate Pi of the multipath signal in the map environment to the receiver coordinate PBR is di ,1
  • , d i,2
  • this application divides the reflection path attribute Si of the multipath signal into three categories, namely the first reflection path S1, the second reflection path S2 and the third reflection path S3, that is, Si ⁇ S1, S2,S3 ⁇ .
  • S1 is the wireless path that has been reflected once by the environment
  • S2 is the wireless path that has been reflected by moving objects in the environment once
  • S3 is the wireless path that has been reflected multiple times by the environment or moving objects.
  • the distance value from the position of the target object to the receiver is The distance value from the position of the target object to the transmitter is sum of both in, It is the coordinate of the physical reflection point position of the target object in the environment at the current moment, and is used to represent the actual physical position coordinates of the target object at the current moment.
  • the reflection path attribute Si of the multipath signal is S1
  • it represents the position coordinates of the target object at the current moment. It is consistent with the position coordinate Pi of the reflection point of the multipath signal in the map environment, that is And record the perception result at the current moment as
  • the reflection path attribute Si of the multipath signal is S2
  • the position coordinates of the target object at this moment Among them, D i,1 is the actual physical distance value between the target object and the receiver at the current moment, Pi is the position coordinate of the reflection point of the multipath signal in the map environment at the current moment, and PBR is the position coordinate of the receiver in the map environment.
  • the reflection path attribute Si of the multipath signal is S3, it means that the multipath signal has been reflected multiple times by the environment or moving objects, and there is no solution or stable solution to the position of the moving object at this time. It should be noted that for multipath signals, the reflection path attribute Si is S1, The above formula can also be adopted to calculate.
  • the actual physical distance value D i,1 between the target object and the receiver PBR at the current moment can be It is calculated through the following set of equations:
  • the unknown quantity (x, y, z) is the coordinate position of the target object
  • D i,1 is the actual physical distance between the coordinate position of the target object and the coordinate PBR of the receiver
  • the known quantity D i is the multipath signal from the transmitter
  • the coordinate position PBS of the transmitter is the sum of the distances from the target object and the coordinate position PBR of the target object to the receiver.
  • PBS (a, b, c) is the coordinate position of the transmitter
  • PBR (0, 0, 0) is the receiver.
  • ⁇ is the pitch angle of the receiver antenna, is the azimuth angle.
  • the sensing result A Tn at the current moment when the sensing result A Tn at the current moment is consistent with the sensing result A Tn-1 at the previous moment, it is determined that the current environment has not changed.
  • the sensing result A Tn at the current moment is inconsistent with the sensing result A Tn-1 at the previous moment, it is determined that the current environment has changed.
  • the situation where the current environment changes may include a target object appearing in the current environment or the target object moving in the current environment.
  • the movement trajectory of the target object can be determined based on the coordinate position of the target object at the current moment and the coordinate position of the target object at the previous moment.
  • the sensing method of the present application can use multipath signals to sense multiple objects in a multipath environment. At the same time, it can sense not only moving objects, but also stationary objects. It can be seen that this application can overcome the multipath effects of complex environments and achieve wireless perception of moving objects and stationary objects in the environment under known spatial map conditions.
  • step S101 may include but is not limited to the following sub-steps:
  • Step S601 Calculate the time domain impulse responses of multipath signals received at different times to obtain an impulse response sequence
  • Step S602 Determine the arrival time and the time interval corresponding to the time domain impulse response of the arrival time according to the impulse response sequence;
  • Step S603 Determine the arrival angle of each path signal in the multipath signal according to the time interval, where the arrival angle includes the pitch angle and the azimuth angle.
  • the multi-antenna receiver receives multi-path signals reflected by objects in the environment to the multi-antenna receiver, and the multi-antenna receiver analyzes and calculates the multi-path signals received by the multi-antennas.
  • Time domain impulse response based on the impulse response sequence, determines the arrival time ti of the multipath signal, and the time interval corresponding to the impulse response of the distributed multipath signal arrival time ti, and then determines the impact based on the arrival time ti of the multipath signal Acquire multi-antenna data in the corresponding time interval and analyze the arrival angle ⁇ i of each path, where the arrival angle ⁇ i includes the pitch angle ⁇ and the azimuth angle
  • the time domain impulse response is obtained by time domain mathematical processing of the multipath signal received by the receiver and the multipath signal transmitted by the transmitter, or the multipath signal received by the receiver is transformed from the time domain to In the frequency domain, multiply each first subcarrier data of the multipath signal by the conjugate of the frequency domain data of the multipath signal transmitted by the transmitter to obtain each second subcarrier data, and then transform each second subcarrier data to time obtained from the domain.
  • the time interval is an interval consisting of a minimum sampling point time and a maximum sampling point time when the time domain response energy or the frequency domain response energy exceeds a preset threshold.
  • step S603 may include but is not limited to the following sub-steps:
  • Step S701 Obtain multi-antenna data of the receiver and analyze the arrival angle of each path signal;
  • Step S702 Read the time domain time data corresponding to the channel impulse response of each antenna according to the time domain time of each path signal;
  • Step S703 Perform multipath angle calculation on the time domain data corresponding to the channel impulse response of each antenna to obtain the pitch angle and azimuth angle of each path signal.
  • the multi-antenna data is acquired in the time interval corresponding to the impulse response of the multipath signal arrival time ti, the arrival angle ⁇ i of each path signal is analyzed, and according to the time domain time of each path signal, the The time domain data corresponding to the channel impulse response of each antenna are then calculated for the angle of the multipath signal to obtain the pitch angle ⁇ and azimuth angle of each path signal.
  • angle calculation includes but is not limited to angle estimation methods such as MUSIC (Multiple Signal Classification).
  • step S102 may include but is not limited to the following sub-steps:
  • Step S801 Determine the reflection points of the multipath signal in the preset map environment at different times based on the arrival angles at different times. set;
  • Step S802 Determine the reflection path attributes of the multipath signal at different times based on the position of the reflection point at different times, the position of the transmitter in the map environment, the position of the receiver in the map environment, and the arrival time at different times.
  • the receiver receives the multipath signal and calculates the arrival time ti and arrival angle ⁇ i of the multipath signal. Calculate the reflection point position Pi of the received multipath signal in the map environment based on the arrival angle ⁇ i of the multipath signal.
  • the multipath signal is extended in the space of the map environment according to the arrival angles at different times until the first virtual intersection occurs between the multipath signal and the building interface in the map environment.
  • the virtual intersection point is the location of the reflection point of the multipath signal at different times in the map environment.
  • P1, P2, P3, and P4 are the reflection point positions of the multipath signal on the interface where the building wall is located in the map environment.
  • the distance from the reflection point position coordinate Pi of the multipath signal in the map environment to the receiver coordinate PBR is di ,1
  • the distance from the reflection point position coordinate Pi of the multipath signal in the map environment to the transmitter coordinate The distance of PBS is d i,2 .
  • , d i,2
  • the distance value from the position of the target object to the receiver coordinate PBR is The distance value from the position of the target object to the transmitter coordinates PBS is sum of both in, It is the coordinate of the physical reflection point position of the target object in the environment at the current moment, and is used to represent the actual physical position coordinates of the target object at the current moment.
  • step S802 may include but is not limited to the following sub-steps:
  • Step S901 Calculate the distance value between the reflection point position at different times and the position of the transmitter in the map environment, and obtain the first distance value
  • Step S902 Calculate the distance value between the reflection point position at different times and the position of the receiver in the map environment, and obtain the second distance value
  • Step S903 Calculate the third distance value based on the product of the arrival time and the speed of light, where the third distance value is the distance value between the target object and the position of the transmitter in the map environment and the position of the target object and the receiver in the map environment. The sum of distance values between;
  • Step S904 Compare the third distance value with the sum of the first distance value and the second distance value to obtain a comparison result
  • Step S905 Determine the reflection path attributes of the multipath signal at different times according to the comparison results.
  • the reflection path attribute is classified as the first reflection path S1; if D i ⁇ d i,1 +d i,2 , the reflection path attribute is classified as the second reflection path S2; If D i >d i,1 +d i,2 , the reflection path attribute is classified as the third reflection path S3.
  • the multipath signal at the current moment is determined.
  • the reflection path attribute Si is the first reflection path S1
  • the first reflection path S1 is used to represent the wireless path in which the multipath signal is reflected once by the environment.
  • the comparison result is that the third distance value Di is less than the sum of the first distance value di,1 and the second distance value di,2 , determine the multipath signal at the current moment.
  • the reflection path attribute Si is the second reflection path S2, and the second reflection path S2 is used to represent the primary reflection path of the multipath signal passing through the moving object in the environment.
  • the multipath signal at the current moment is determined.
  • the reflection path attribute Si is the third reflection path S3.
  • the third reflection path S3 is used to represent the wireless path in which the multipath signal is reflected multiple times by the environment or moving objects.
  • the sensing result is the coordinate position of the target object at the current moment. It is consistent with the reflection point position Pi.
  • the reflection path attribute Si of the multipath signal is S1
  • it represents the position coordinates of the target object at the current moment. It is consistent with the position coordinate Pi of the reflection point of the multipath signal in the map environment, that is And record the perception result at the current moment as
  • the sensing result is the reflection point position Pi at the current moment
  • the position of the receiver in the map environment PBR and the fourth distance value D i,1 determines the coordinate position of the target object at the current moment
  • the fourth distance value D i,1 is the actual physical distance between the target object and the receiver.
  • the reflection path attribute Si of the multipath signal is S2
  • the position coordinates of the target object at this moment are Among them, D i,1 is the actual physical distance value between the target object and the receiver at the current moment, Pi is the position coordinate of the reflection point of the multipath signal in the map environment at the current moment, and PBR is the position coordinate of the receiver in the map environment. And record the perception result at the current moment as
  • the reflection path attribute Si of the multipath signal is S3
  • the signal reflection path distance of the target object is larger than the map space. Reflection point, at this moment there is no solution or no stable solution to the position of the moving object.
  • the fourth distance value D i,1 can be calculated through the following set of equations:
  • the unknown quantity (x, y, z) is the coordinate position of the target object
  • D i,1 is the actual physical distance between the coordinate position of the target object and the coordinate PBR of the receiver
  • the known quantity D i is the multipath signal from the transmitter
  • the coordinate position PBS of the transmitter is the sum of the distances from the target object and the coordinate position PBR of the target object to the receiver.
  • PBS (a, b, c) is the coordinate position of the transmitter
  • PBR (0, 0, 0) is the receiver.
  • ⁇ is the pitch angle of the receiver antenna, is the azimuth angle.
  • the sensing method may also include but is not limited to the following steps:
  • Synchronization correction is performed on the transmitter and receiver to achieve clock synchronization.
  • the transmitter and the receiver before the transmitter transmits the multipath signal, complete clock synchronization.
  • the completion of clock synchronization between the transmitter and the receiver means that the transmitter and the receiver have completed synchronization and achieved clock synchronization. Or, the transmitter and receiver have not completed synchronization. It is necessary to measure the clock difference, hardware link delay and other information of the transmitter and receiver, and calculate the synchronization correction amount.
  • the correction amount is used to correct the reception arrival time to realize the clock Synchronize. It should be noted that the arrival time ti in this application refers to the arrival time after correction.
  • the sensing result A Tn at the current moment when the sensing result A Tn at the current moment is consistent with the sensing result A Tn-1 at the previous moment, it is determined that the current environment has not changed.
  • the sensing result A Tn at the current moment is inconsistent with the sensing result A Tn-1 at the previous moment, it is determined that the current environment has changed.
  • the situation where the current environment changes may include a target object appearing in the current environment or the target object moving in the current environment.
  • the movement trajectory of the target object can be determined based on the coordinate position of the target object at the current moment and the coordinate position of the target object at the previous moment.
  • the sensing method of the present application can use multipath signals to sense multiple objects in a multipath environment. At the same time, it can sense not only moving objects, but also stationary objects. It can be seen that this application can overcome the multipath effects of complex environments and achieve wireless perception of moving objects and stationary objects in the environment under known spatial map conditions.
  • Embodiment 1 takes as an example the case where the target object is a person, and when the person walks around the room, the positions at time Tn and time Tn+1 are inconsistent.
  • the transmitter BS transmits multipath signals at the set time and wireless resources.
  • signal where the coordinates of the transmitter BS are PBS and the coordinates of the receiver BR are PBR.
  • the receiver BR receives the multipath signal.
  • the receiver BR receives the multipath signal and analyzes and calculates the time domain impulse response of the multipath signal received by multiple antennas. Based on the impulse response sequence, the arrival time ti of the multipath signal and ti distribution are determined.
  • the time interval of the impulse response and then combine the MUSIC algorithm to obtain the multi-antenna data in the time interval corresponding to the impulse response according to the arrival time of the multipath signal, and calculate the arrival angle ⁇ i to each path signal, where i is the number of the multipath number , i is greater than or equal to 1.
  • a virtual straight line is extended in the existing room map space according to the arrival angle ⁇ i of the received multipath signal until the virtual straight line is in contact with the interior wall of the room.
  • the first virtual intersection point is generated on the interface.
  • This virtual intersection point is the reflection point of the multipath signal in the room map environment.
  • the coordinates of the reflection point can be obtained through the room map space as Pi, and the distance d i between Pi and the receiver BR can be calculated. ,1 , and the distance d i,2 between Pi and the transmitter BS.
  • di ,1
  • , di ,2
  • the reflection path attribute Si is S1
  • the moving distance and direction of movement of the person can be determined. From this, The movement trajectory of the person in the room can be determined based on the perception result A Tn+1 corresponding to time Tn+1 and compared with the perception result A Tn at the previous time Tn .
  • Embodiment 2 as shown in Figure 11, takes the target object as a person, there is no one in the room at time Tn, but there is someone in the room at time Tn+1.
  • the transmitter BS transmits multipath signals at the set time and wireless resources, where the coordinates of the transmitter BS are PBS and the coordinates of the receiver BR are PBR. Assume that the receiver BR receives the multipath signal.
  • the receiver BR receives the multipath signal and analyzes and calculates the time domain impulse response of the multipath signal received by multiple antennas. Based on the impulse response sequence, the arrival time ti of the multipath signal and ti distribution are determined.
  • the time interval of the impulse response and then combine the MUSIC algorithm to obtain the multi-antenna data in the time interval corresponding to the impulse response according to the arrival time of the multipath signal, and calculate the arrival angle ⁇ i to each path signal, where i is the number of the multipath number , i is greater than or equal to 1.
  • a virtual straight line is extended in the existing room map space according to the arrival angle ⁇ i of the received multipath signal until the virtual straight line is in contact with the interior wall of the room.
  • the first virtual intersection point is generated on the interface.
  • This virtual intersection point is the reflection point of the multipath signal in the room map environment.
  • the coordinates of the reflection point can be obtained through the room map space as Pi, and the distance d i between Pi and the receiver BR can be calculated. ,1 , and the distance d i,2 between Pi and the transmitter BS.
  • di ,1
  • , di ,2
  • the reflection path attribute Si is S1
  • an embodiment of the present application also provides a receiver.
  • the receiver includes: one or more processors 110 and memory 120.
  • one processor 110 and memory 120 are taken as an example.
  • the processor 110 and the memory 120 may be connected through a bus or other means. In FIG. 12 , the connection through a bus is taken as an example.
  • the memory 120 can be used to store non-transitory software programs and non-transitory computer executable programs, such as the sensing method in the above embodiments of the present application.
  • the processor 110 implements the above sensing method in the embodiment of the present application by running non-transient software programs and programs stored in the memory 120 .
  • the memory 120 may include a storage program area and a storage data area, wherein the storage program area may store an operating system and an application program required for at least one function; the storage data area may store data required to execute the sensing method in the embodiments of the present application. wait.
  • the memory 120 may include high-speed random access memory and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid-state storage device.
  • the memory 120 optionally includes memories remotely located relative to the processor 110, and these remote memories can be connected to the terminal through a network. Examples of the above-mentioned networks include but are not limited to the Internet, intranets, local area networks, mobile communication networks and combinations thereof.
  • the non-transitory software programs and programs required to implement the above-mentioned sensing methods in the embodiments of the present application are stored in the memory 120.
  • the above-mentioned sensing methods in the embodiments of the present application are executed, for example , execute the above described method steps S101 to step S104 in Figure 1B, method steps S601 to step S603 in Figure 6, method steps S701 to step S703 in Figure 7, method steps S801 to step S802 in Figure 8, Figure 9 method steps in S901 to step S905, the receiver determines the arrival time and arrival angle of the multipath signal at different times based on the multipath signals received at different times; determines the reflection path attributes of the multipath signal at different times based on the arrival time and arrival angle at different times.
  • the receiver analyzes and calculates the multipath signals received at different times to obtain the arrival time and arrival angle of the multipath signal at different times, and then determines the reflection of the multipath signal at different times based on the arrival time and arrival angle at different times.
  • Path attributes and obtain the perception results of the current environment at different times based on the arrival time, arrival angle and reflection path attributes at different times. Compare the perception results at the current moment with the perception results at the previous moment to determine whether the current environment occurs. Variety. Based on this, compared with the existing technology, multipath signals can be used to sense the current environment in a multipath environment by analyzing multipath signals received at different times.
  • embodiments of the present application also provide a computer-readable storage medium that stores a computer-executable program, and the computer-executable program is executed by one or more control processors, for example, as shown in FIG. 12
  • Execution by one of the processors 110 may cause the one or more processors 110 to perform the sensing method in the embodiment of the present application, for example, perform steps S101 to S104 of the method in FIG. 1B described above, and steps S104 in FIG. 6
  • Method steps S601 to step S603, method steps S701 to step S703 in Figure 7, method steps S801 to step S802 in Figure 8, method steps S901 to step S905 in Figure 9 are determined according to the multipath signals received at different times.
  • the arrival time and arrival angle of the multipath signal at different times determine the reflection path attributes of the multipath signal at different times based on the arrival time and arrival angle at different times; determine the reflection path attributes at different times based on the arrival time, arrival angle, and reflection path attributes at different times.
  • Perception results of the current environment at all times determine whether the current environment has changed based on the perception results at different times. Therefore, the multipath signals received at different times are analyzed and calculated to obtain the arrival time and arrival angle of the multipath signal at different times, and then the reflection path attributes of the multipath signal at different times are determined based on the arrival time and arrival angle at different times.
  • multipath signals can be used to sense the current environment in a multipath environment by analyzing multipath signals received at different times.
  • Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disk (DVD) or other optical disk storage, magnetic cassettes, tapes, disk storage or other magnetic storage devices, or may Any other medium used to store the desired information and that can be accessed by a computer.
  • communication media typically embodies a computer-readable program, data structure, program module or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media .

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Abstract

本申请公开了感知方法、接收机及存储介质，其中，感知方法包括根据不同时刻接收到的多径信号确定多径信号在不同时刻的到达时间和到达角度；根据不同时刻的到达时间和到达角度确定多径信号在不同时刻的反射径属性；根据不同时刻的到达时间、到达角度和反射径属性得到在不同时刻对当前环境的感知结果；根据不同时刻的感知结果确定当前环境是否发生变化。

Description

感知方法、接收机及存储介质
相关申请的交叉引用
本申请基于申请号为202210846533.6、申请日为2022年07月19日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请实施例涉及但不限于通信领域，特别是涉及一种感知方法、接收机及存储介质。
背景技术
在相关技术中，无线通信网满足泛在性，因此通过无线通信网实现泛在感知成为主要可行的技术路线。泛在感知需要能够在各种复杂场景下实现感知，比如多径环境，但目前对多径环境的感知研究较少，能够落地商用的感知技术更少，多径环境的感知在标准化和学界方面均为研究热点，处于技术突破前期。因此，如何在多径环境下对当前环境实现感知成为亟待解决的技术问题。
发明内容
本申请实施例提供了一种感知方法、接收机及存储介质，能够在多径环境下利用多径信号对当前环境实现感知。
第一方面，本申请实施例提供了一种感知方法，包括：
根据不同时刻接收到的多径信号确定所述多径信号在不同时刻的到达时间和到达角度；根据不同时刻的所述到达时间和所述到达角度确定所述多径信号在不同时刻的反射径属性；根据不同时刻的所述到达时间、所述到达角度和所述反射径属性得到在不同时刻对当前环境的感知结果；根据不同时刻的所述感知结果确定所述当前环境是否发生变化。
第二方面，本申请实施例提供了一种接收机，包括：存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，所述处理器执行所述计算机程序时实现如上第一方面所述的感知方法。
第三方面，本申请实施例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存储有计算机可执行程序，所述计算机可执行程序用于使计算机执行如上第一方面所述的感知方法。
本申请实施例包括：根据不同时刻接收到的多径信号确定多径信号在不同时刻的到达时间和到达角度；根据不同时刻的到达时间和到达角度确定多径信号在不同时刻的反射径属性；根据不同时刻的到达时间、到达角度和反射径属性得到在不同时刻对当前环境的感知结果；根据不同时刻的感知结果确定当前环境是否发生变化。也就是说，对不同时刻接收到的多径信号进行分析计算，得到多径信号在不同时刻的到达时间和到达角度，再根据不同时刻的到达时间和到达角度确定多径信号在不同时刻的反射径属性，并根据不同时刻的到达时间、到达角度和反射径属性得到在不同时刻对当前环境的感知结果，将当前时刻的感知结果和上一 时刻的感知结果进行比较，从而确定当前环境是否发生变化。基于此，相比于现有技术，本申请的感知方法通过对不同时刻接收到的多径信号进行分析，从而能够在多径环境下利用多径信号对当前环境实现感知。
附图说明
图1A是本申请一个实施例提供的用于执行感知方法的实施环境的示意图；
图1B是本申请一个实施例提供的一种感知方法的流程图；
图2是本申请一个实施例提供的一种多径信号的反射径属性为S1的示意图；
图3是本申请一个实施例提供的一种多径信号的反射径属性为S2的示意图；
图4是本申请一个实施例提供的一种多径信号的反射径属性为S3的示意图；
图5是本申请一个实施例提供的一种目标物体、发射机和接收机之间位置计算示意图；
图6是本申请一个实施例提供的一种感知方法的子流程图；
图7是本申请另一个实施例提供的一种感知方法的子流程图；
图8是本申请另一个实施例提供的一种感知方法的子流程图；
图9是本申请另一个实施例提供的一种感知方法的子流程图；
图10是本申请一个实施例提供的人在房间走动时，且Tn时刻和Tn+1时刻位置不一致的情况的示意图；
图11是本申请一个实施例提供的Tn时刻房间没有人，但Tn+1时刻房间有人的情况的示意图；
图12是本申请一个实施例提供的一种接收机结构示意图。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。
应了解，在本申请实施例的描述中，多个(或多项)的含义是两个以上，大于、小于、超过等理解为不包括本数，以上、以下、以内等理解为包括本数。如果有描述到“第一”、“第二”等只是用于区分技术特征为目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量或者隐含指明所指示的技术特征的先后关系。
目前正处于第四次工业革命时代，第四次工业革命重要特点是泛在智能化。智能化技术一方面深入人们生活，给人们生活带来极大的便利和全新的体验，另一方面智能化技术将深入到各行各业，通过智能实现产业升级，提升产业效率。两个方向的发展将极大的解放人类，摆脱低水平生产的束缚。
泛在智能化技术主要包括泛在感知技术、泛在计算技术、以及产品研发等方面。因此泛在智能化需要一个泛在系统，而目前在部署的系统中，只有无线通信网满足泛在性，因此通过无线通信网实现泛在感知和泛在计算成为主要可行的技术路线。
目前感知领域主要是在雷达领域中有深入的研究，而目前雷达设备的应用场景主要有对空飞机的感知，如机场雷达；以及短距离感知，如车载雷达。这两个场景均属于简单场景。泛在感知需要能够在各种复杂场景下实现感知，比如室内多径环境、地面多建筑物环境、多 车环境、商场多人环境等等。多径环境的感知在目前研究较少，能够落地商用的感知技术更少。多径环境的感知在标准化、学界方面均为研究热点，处于技术突破前期。因此，如何在多径环境下对当前环境实现感知成为亟待解决的技术问题。
基于此，本申请实施例提供了一种感知方法、接收机及计算机可读存储介质。其中一个实施例的感知方法，根据不同时刻接收到的多径信号确定多径信号在不同时刻的到达时间和到达角度；根据不同时刻的到达时间和到达角度确定多径信号在不同时刻的反射径属性；根据不同时刻的到达时间、到达角度和反射径属性得到在不同时刻对当前环境的感知结果；根据不同时刻的感知结果确定当前环境是否发生变化。在上述实施例中，对不同时刻接收到的多径信号进行分析计算，得到多径信号在不同时刻的到达时间和到达角度，再根据不同时刻的到达时间和到达角度确定多径信号在不同时刻的反射径属性，并根据不同时刻的到达时间、到达角度和反射径属性得到在不同时刻对当前环境的感知结果，将当前时刻的感知结果和上一时刻的感知结果进行比较，从而确定当前环境是否发生变化。基于此，相比于现有技术，本申请的感知方法通过对不同时刻接收到的多径信号进行分析，从而能够在多径环境下利用多径信号对当前环境实现感知。
下面结合附图，对本申请实施例作进一步阐述。
如图1A所示，图1A是本申请一个实施例提供的用于执行感知方法的实施环境的示意图。
在图1A的示例中，该实施环境包括发射机BS和接收机BR，其中，发射机BS负责发射多径信号，接收机BR负责接收多径信号，发射机BS和接收机BR之间可以有直射径，也可以没有直射径。接收机BR接收到的多径信号可以是经过环境一次反射的多径信号，也可以是经过环境中移动物体一次反射的多径信号，还可以是经过环境或者移动物体多次反射的多径信号。需要说明的是，多径信号包括但不限于正交频分复用信号和线性调频信号等专用感知信号。
本领域技术人员可以理解的是，该实施环境可以应用于5G、6G通信网络系统以及后续演进的移动通信网络系统等，本实施例对此并不作具体限定。
本领域技术人员可以理解的是，图1A中示出的实施环境并不构成对本申请实施例的限定，可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
基于上述实施环境，下面提出本申请的感知方法的各个实施例。
如图1B所示，本申请一个实施例提供的一种感知方法的流程图。感知方法可以应用于接收机，接收机包括但不限于接收基站以及多天线接收机，感知方法包括但不限于如下步骤：
步骤S101：根据不同时刻接收到的多径信号确定多径信号在不同时刻的到达时间和到达角度；
步骤S102：根据不同时刻的到达时间和到达角度确定多径信号在不同时刻的反射径属性；
步骤S103：根据不同时刻的到达时间、到达角度和反射径属性得到在不同时刻对当前环境的感知结果；
步骤S104：根据不同时刻的感知结果确定当前环境是否发生变化。
在一可行的实施方式中，以接收机为多天线接收机为例，多天线接收机对不同时刻接收到的多径信号进行分析计算，得到多径信号在不同时刻的到达时间和到达角度，再根据不同时刻的到达时间和到达角度确定多径信号在不同时刻的反射径属性，并根据不同时刻的到达时间、到达角度和反射径属性得到在不同时刻对当前环境的感知结果，将当前时刻的感知结 果和上一时刻的感知结果进行比较，从而确定当前环境是否发生变化。基于此，相比于现有技术，本申请的感知方法通过对不同时刻接收到的多径信号进行分析，从而能够在多径环境下利用多径信号对当前环境实现感知。
在一可行的实施方式中，如图1A所示，发射机在设定的时间Tn和无线资源上发射多径信号。接收机接收多径信号，计算多径信号的到达时间ti和到达角度αi，其中，i为接收到多径信号的多径数目。根据多径信号的到达角度αi计算接收到的多径信号在地图环境的反射点位置Pi,计算Pi到接收机的坐标位置PBR的距离di,1和Pi到发射机的坐标位置PBS的距离di,2。再根据判决条件分类地图环境反射径和移动物体实际反射径确定多径信号的反射径属性Si。并根据多径信号的到达时间ti和到达角度αi计算环境中目标物体的实际物理反射点的位置记录Tn时刻感知结果通过比较当前时刻的感知结果ATn和上一时刻的感知结果ATn-1，确定当前环境是否发生变化。需要说明的是，无线资源包括但不限于以符号为单位、以子载波为单位、以帧为单位等分配的时域和频域资源。
在一可行的实施方式中，在发射机发射多径信号之前，发射机和接收机完成时钟同步。发射机和接收机完成时钟同步是指发射机和接收机已经完成同步，实现时钟同步。或者，发射机和接收机未完成同步，需要测量发射机和接收机的钟差、硬件链路时延等信息，计算得到同步矫正量，矫正量用于对接收到达时间进行矫正，以实现时钟同步。需要说明的是，本申请的到达时间ti是指矫正后的到达时间。
在一可行的实施方式中，如图1A所示，以接收机的坐标为原点，根据接收机接收多径信号的到达角度作虚拟直线，该虚拟直线与地图环境中建筑物界面的第一个虚拟交点为多径信号在地图环境的反射点位置Pi。例如，图1A中的P1、P2、P3、P4为多径信号在地图环境中建筑物墙面所在界面的各个反射点位置，其中，di,1用于表示多径信号在地图环境的反射点位置坐标Pi到接收机BR的距离，di,2用于表示多径信号在地图环境的反射点位置坐标Pi到发射机BS的距离，i表示多径信号中每条径信号的编号。需要说明的是，反射点位置Pi可以为三维地图坐标(x，y，z)。需要说明的是，地图环境包括但不限于已知移动物体所处的建筑结构、房间摆放的物体、建筑物或者物体形成具有坐标系统的地图环境。
在一可行的实施方式中，多天线接收机接收经过环境中物体反射到多天线接收机的多径信号，多天线接收机分析计算多天线接收的多径信号的时域冲击响应，根据冲击响应序列，确定多径信号的到达时间ti，以及分布的多径信号的到达时间ti的冲击响应对应所在的时间区间，然后再根据多径信号的到达时间ti的冲击响应对应所在的时间区间获取多天线数据分析每条径的到达角度αi，其中到达角度αi包括俯仰角θ和方位角
在一可行的实施方式中，多径信号在地图环境的反射点位置坐标Pi到接收机坐标PBR的距离为di,1，多径信号在地图环境的反射点位置坐标Pi到发射机坐标PBS的距离为di,2，di,1和di,2可以根据常规数学方法计算得到，其中，di,1＝|PBR-Pi|，di,2＝|PBS-Pi|。
在一可行的实施方式中，本申请将多径信号的反射径属性Si分为三类，分别为第一反射径S1、第二反射径S2和第三反射径S3，即Si∈{S1,S2,S3}。其中，S1为经过环境一次反射的无线径，S2为经过环境中移动物体的一次反射径，S3为经过环境或者移动物体多次反射的无线径。对于多径信号的反射径属性的确定，可以通过如下判断条件进行判定：当满足Di＝di,1+di,2，则确定多径信号的反射径属性为第一反射径S1；当满足Di<di,1+di,2，则确定多径信号的反射径属性为第二反射径S2；当满足Di>di,1+di,2，则确定多径信号的反射径 属性为第三反射径S3。需要说明的是，目标物体的位置到接收机的距离值为目标物体的位置到发射机的距离值为两者之和其中，为环境中目标物体在当前时刻的物理反射点位置的坐标，用于表示目标物体在当前时刻的实际的物理位置坐标。且Di可以根据前面估计多径信号的到达时间ti计算得到，即Di＝ti*v，其中，v为光速。
在一可行的实施方式中，如图2所示，若多径信号的反射径属性Si为S1时，则表示当前时刻目标物体的位置坐标与多径信号在地图环境的反射点位置坐标Pi一致，即并记录当前时刻的感知结果为如图3所示，若多径信号的反射径属性Si为S2时，此时刻目标物体的位置坐标其中，Di,1为当前时刻目标物体到接收机之间的实际物理距离值，Pi为当前时刻的多径信号在地图环境的反射点位置坐标，PBR为接收机在地图环境的位置坐标。并记录当前时刻的感知结果为 如图4所示，若多径信号的反射径属性Si为S3时，表示多径信号经过环境或者移动物体多次反射，此时刻对移动物体的位置无解或者没有稳定解。需要说明的是，对于多径信号的反射径属性Si为S1，同样可以采取上述公式来计算得到。
在一可行的实施方式中，如图5所示，根据目标物体与发射机PBS、接收机PBR的位置关系，对于当前时刻目标物体到接收机PBR之间的实际物理距离值Di,1可以通过如下方程组计算得到：
对公式(5)展开，得到如下，
由公式(4)，x2+y2+z2＝Di,1 2，代入上式，得到如下，
2ax+2by+2cz-2DiDi,1＝a2+b2+c2-Di 2
将公式(1)、(2)、(3)代入，得到如下，

其中，未知量(x,y,z)为目标物体的坐标位置、Di,1为目标物体的坐标位置与接收机的坐标PBR的实际物理距离；已知量Di为多径信号从发射机的坐标位置PBS到目标物体，以及与目标物体到接收机的坐标位置PBR的距离之和，PBS(a,b,c)为发射机的坐标位置,PBR(0,0,0)为接收机的坐标位置，θ为接收机天线的俯仰角，为方位角。
在一可行的实施方式中，在当前时刻的感知结果ATn和上一时刻的感知结果ATn-1一致的情况下，确定当前环境没有发生变化。在当前时刻的感知结果ATn和上一时刻的感知结果ATn-1不一致的情况下，确定当前环境发生变化。当前环境发生变化的情形可以包括当前环境出现目标物体或者目标物体在当前环境发生移动。在目标物体在当前环境发生移动的情况下，可以根据目标物体在当前时刻的坐标位置和目标物体在上一时刻的坐标位置，确定目标物体的移动轨迹。
基于此，与现有技术相比，采用本申请的感知方法能够在多径环境下利用多径信号感知多个物体，同时不仅能够感知移动物体，也能感知静止物体。可知，本申请能够克服复杂环境多径影响、在已知空间地图条件下对环境中的运动物体和静止物体实现无线感知。
如图6所示，步骤S101可以包括但不限于如下子步骤：
步骤S601：计算不同时刻接收到的多径信号的时域冲击响应，得到冲击响应序列；
步骤S602：根据冲击响应序列确定到达时间以及到达时间的时域冲击响应对应所在的时间区间；
步骤S603：根据时间区间确定多径信号中每条径信号的到达角度，其中，到达角度包括俯仰角和方位角。
在一可行的实施方式中，以多天线接收机为例，多天线接收机接收经过环境中物体反射到多天线接收机的多径信号，多天线接收机分析计算多天线接收的多径信号的时域冲击响应，根据冲击响应序列，确定多径信号的到达时间ti，以及分布的多径信号的到达时间ti的冲击响应对应所在的时间区间，然后再根据多径信号的到达时间ti的冲击响应对应所在的时间区间获取多天线数据分析每条径的到达角度αi，其中到达角度αi包括俯仰角θ和方位角
在一可行的实施方式中，时域冲击响应由接收机接收的多径信号和发射机发射的多径信号做时域数学处理而得到，或者由接收机接收的多径信号从时域变换到频域，对多径信号的各个第一子载波数据乘以发射机发射的多径信号的频域数据的共轭，得到各个第二子载波数据，再对各个第二子载波数据变换到时域而得到。
在一可行的实施方式中，时间区间为时域响应能量或频域响应能量超过预设门限的最小采样点时间和最大采样点时间构成的区间。
如图7所示，步骤S603可以包括但不限于如下子步骤：
步骤S701：获取接收机的多天线数据，分析每条径信号的到达角度；
步骤S702：根据每条径信号的所在时域时间读取每条天线的信道冲击响应对应的时域时间的数据；
步骤S703：对每条天线的信道冲击响应对应的时域时间的数据进行多径角度计算，得到每条径信号的俯仰角和方位角。
在一可行的实施方式中，多径信号到达时间ti的冲击响应对应所在的时间区间获取多天线数据，分析每条径信号的到达角度αi，根据每条径信号的所在时域时间，读取每条天线的信道冲击响应对应的时域时间的数据，然后进行多径信号的角度计算，以获得每条径信号的俯仰角θ和方位角需要说明的是，角度计算包括但不限于MUSIC(Multiple Signal Classification，多重信号分类)等角度估计方法。
如图8所示，步骤S102可以包括但不限于如下子步骤：
步骤S801：根据不同时刻的到达角度确定多径信号在预设地图环境不同时刻的反射点位 置；
步骤S802：根据不同时刻的反射点位置、发射机在地图环境的位置、接收机在地图环境的位置、不同时刻的到达时间确定多径信号在不同时刻的反射径属性。
在一可行的实施方式中，接收机接收到多径信号，计算多径信号的到达时间ti和到达角度αi。根据多径信号的到达角度αi计算接收到的多径信号在地图环境的反射点位置Pi。具体地，以接收机为坐标原点，根据不同时刻的到达角度对多径信号在地图环境的空间进行延伸，直到多径信号与地图环境中建筑物界面产生第一个虚拟交点处，第一个虚拟交点即为多径信号在地图环境不同时刻的反射点位置。如图1A所示，P1、P2、P3、P4为多径信号在地图环境中建筑物墙面所在界面的各个反射点位置。
在一可行的实施方式中，假设多径信号在地图环境的反射点位置坐标Pi到接收机坐标PBR的距离为di,1，多径信号在地图环境的反射点位置坐标Pi到发射机坐标PBS的距离为di,2，计算Pi到接收机的坐标位置PBR的距离di,1和Pi到发射机的坐标位置PBS的距离di,2。di,1和di,2可以根据如下公式计算得到，di,1＝|PBR-Pi|，di,2＝|PBS-Pi|。
在一可行的实施方式中，目标物体的位置到接收机坐标PBR的距离值为目标物体的位置到发射机坐标PBS的距离值为两者之和其中，为环境中目标物体在当前时刻的物理反射点位置的坐标，用于表示目标物体在当前时刻的实际的物理位置坐标。且Di可以根据多径信号的到达时间ti计算得到，即Di＝ti*v，其中，v为光速。
在一可行的实施方式中，可以根据Di、di,1、di,2构成的判决条件确定多径信号的反射径属性Si。若Di＝di,1+di,2，反射径属性归为第一反射径S1；若Di<di,1+di,2，反射径属性归为第二反射径S2；若Di>di,1+di,2，反射径属性归为第三反射径S3。
如图9所示，步骤S802可以包括但不限于如下子步骤：
步骤S901：计算不同时刻的反射点位置与发射机在地图环境的位置之间的距离值，得到第一距离值；
步骤S902：计算不同时刻的反射点位置与接收机在地图环境的位置之间的距离值，得到第二距离值；
步骤S903：根据到达时间与光速之积计算得到第三距离值，其中，第三距离值为目标物体与发射机在地图环境的位置之间的距离值以及目标物体与接收机在地图环境的位置之间的距离值之和；
步骤S904：将第三距离值与第一距离值和第二距离值之和进行比较，得到比较结果；
步骤S905：根据比较结果定多径信号在不同时刻的反射径属性。
在一可行的实施方式中，以Tn时刻为例，计算多径信号在地图环境的反射点位置坐标Pi到接收机在地图环境坐标PBR之间距离值，得到第一距离值为di,1；计算多径信号在地图环境的反射点位置坐标Pi到发射机在地图环境坐标PBS之间距离值，得到第二距离值为di,2。可知，di,1和di,2可以根据如下公式计算得到，di,1＝|PBR-Pi|，di,2＝|PBS-Pi|。
在一可行的实施方式中，目标物体与发射机在地图环境的位置PBS之间的距离值以及目标物体与接收机在地图环境的位置PBR之间的距离值之和为第三距离值Di，即第三距离值 可以根据多径信号的到达时间ti计算得到Di，即Di＝ti*v，其中，v为光速。将第三距离值Di与第一距离值di,1和第二距离值di,2之和进行比较，得到三种比较 结果。若Di＝di,1+di,2，反射径属性归为第一反射径S1；若Di<di,1+di,2，反射径属性归为第二反射径S2；若Di>di,1+di,2，反射径属性归为第三反射径S3。
在一可行的实施方式中，在比较结果为第三距离值Di等于第一距离值di,1和第二距离值di,2之和的情况下，确定多径信号在当前时刻的反射径属性Si为第一反射径S1，第一反射径S1用于表征多径信号经过环境一次反射的无线径。
在一可行的实施方式中，在比较结果为第三距离值Di小于第一距离值di,1和第二距离值di,2之和的情况下，确定多径信号在当前时刻的反射径属性Si为第二反射径S2，第二反射径S2用于表征多径信号经过环境中移动物体的一次反射径。
在一可行的实施方式中，在比较结果为第三距离值Di大于第一距离值di,1和第二距离值di,2之和的情况下，确定多径信号在当前时刻的反射径属性Si为第三反射径S3，第三反射径S3用于表征多径信号经过环境或者移动物体多次反射的无线径。
在一可行的实施方式中，在确定反射径属性Si为第一反射径S1的情况下，感知结果为目标物体在当前时刻的坐标位置与反射点位置Pi一致。如图2所示，若多径信号的反射径属性Si为S1时，则表示当前时刻目标物体的位置坐标与多径信号在地图环境的反射点位置坐标Pi一致，即并记录当前时刻的感知结果为
在一可行的实施方式中，在确定反射径属性Si为第二反射径S2的情况下，感知结果为根据当前时刻的反射点位置Pi、接收机在地图环境的位置PBR和第四距离值Di,1确定目标物体在当前时刻的坐标位置其中，第四距离值Di,1为目标物体与接收机之间的实际物理距离。如图3所示，若多径信号的反射径属性Si为S2时，则表示目标物体的信号反射路径距离小于地图空间反射点，因此，此时刻目标物体的位置坐标其中，Di,1为当前时刻目标物体到接收机之间的实际物理距离值，Pi为当前时刻的多径信号在地图环境的反射点位置坐标，PBR为接收机在地图环境的位置坐标。并记录当前时刻的感知结果为
在一可行的实施方式中，如图4所示，若多径信号的反射径属性Si为S3时，表示多径信号经过环境或者移动物体多次反射，目标物体的信号反射路径距离大于地图空间反射点，此时刻对移动物体的位置无解或者没有稳定解。
需要说明的是，对于多径信号的反射径属性Si为S1或者S2时，均可以采取公式来计算得到，且对于反射径属性Si为S1时，由该公式计算出来的结果
在一可行的实施方式中，第四距离值Di,1可以通过如下方程组计算得到：
对公式(5)展开，得到如下，
由公式(4)，x2+y2+z2＝Di,1 2，代入上式，得到如下，
2ax+2by+2cz-2DiDi,1＝a2+b2+c2-Di 2
将公式(1)、(2)、(3)代入，得到如下，

其中，未知量(x,y,z)为目标物体的坐标位置、Di,1为目标物体的坐标位置与接收机的坐标PBR的实际物理距离；已知量Di为多径信号从发射机的坐标位置PBS到目标物体，以及与目标物体到接收机的坐标位置PBR的距离之和，PBS(a,b,c)为发射机的坐标位置,PBR(0,0,0)为接收机的坐标位置，θ为接收机天线的俯仰角，为方位角。
在步骤S101之前，感知方法还可以包括但不限于如下步骤：
对发射机和接收机进行同步矫正，以实现时钟同步。
在一可行的实施方式中，在发射机发射多径信号之前，发射机和接收机完成时钟同步。发射机和接收机完成时钟同步是指发射机和接收机已经完成同步，实现时钟同步。或者，发射机和接收机未完成同步，需要测量发射机和接收机的钟差、硬件链路时延等信息，计算得到同步矫正量，矫正量用于对接收到达时间进行矫正，以实现时钟同步。需要说明的是，本申请的到达时间ti是指矫正后的到达时间。
在一可行的实施方式中，在当前时刻的感知结果ATn和上一时刻的感知结果ATn-1一致的情况下，确定当前环境没有发生变化。在当前时刻的感知结果ATn和上一时刻的感知结果ATn-1不一致的情况下，确定当前环境发生变化。当前环境发生变化的情形可以包括当前环境出现目标物体或者目标物体在当前环境发生移动。在目标物体在当前环境发生移动的情况下，可以根据目标物体在当前时刻的坐标位置和目标物体在上一时刻的坐标位置，确定目标物体的移动轨迹。
基于此，与现有技术相比，采用本申请的感知方法能够在多径环境下利用多径信号感知多个物体，同时不仅能够感知移动物体，也能感知静止物体。可知，本申请能够克服复杂环境多径影响、在已知空间地图条件下对环境中的运动物体和静止物体实现无线感知。
以下结合具体附图和实施例进一步介绍本申请提供的感知方法。
实施例一，如图10所示，以目标物体为人，且人在房间走动时，Tn时刻和Tn+1时刻位置不一致的情况下为例。
发射机BS和接收机BR完成时钟同步后，发射机BS在设定的时间和无线资源上发射多径 信号，其中，发射机BS的坐标为PBS，接收机BR的坐标为PBR。假设接收机BR接收到多径信号，接收机BR接收多径信号并分析计算多天线接收的多径信号的时域冲击响应，根据冲击响应序列，确定多径信号的到达时间ti，以及ti分布的冲击响应的时间区间，然后在根据多径信号到达时间的冲击响应对应所在的时间区间结合MUSIC算法获取多天线数据计算的到每条径信号的达到角度αi，其中i为多径数的编号，i大于等于1。
以接收机BR的坐标为PBR为原点，以第i条多径为例，根据接收到多径信号的到达角度αi在已有的房间地图空间进行延伸出虚拟直线，直到虚拟直线与房间内墙所在界面产生第一个虚拟交点处，该虚拟交点即为多径信号在房间地图环境的反射点，通过房间地图空间可以获取该反射点坐标为Pi，并计算Pi与接收机BR的距离di,1，以及Pi与发射机BS的距离di,2。其中，di,1＝|PBR-Pi|，di,2＝|PBS-Pi|。计算目标物体到接收机BR的实际物理距离Di,1和目标物体到发射机BS与目标物体到接收机BR的距离之和Di。
根据判决条件分类环境反射径和移动物体反射径，确定多径信号的反射径属性，即可以根据Di、di,1、di,2构成的判决条件确定多径信号的反射径属性Si。若Di＝di,1+di,2，反射径属性归为S1；若Di<di,1+di,2，反射径属性归为S2；若Di>di,1+di,2，反射径属性归为S3。如图2所示，若反射径属性为S1时，即目标物体的坐标位置和地图空间反射点位置坐标Pi一致，即并记录本次感知结果为如图3所示，若反射径属性为S2时，即目标物体的坐标位置和地图空间反射点位置坐标Pi不一致，此时刻目标物体的位置坐标为并记录本次感知结果为 需要说明的是，对于多径信号的反射径属性Si为S1，同样可以采取公式来计算得到，且其计算出来的结果
不断重复上述过程，得到不同时刻的感知结果，例如比较Tn+1时刻对应的感知结果ATn+1和Tn时刻对应的感知结果ATn，即可确定人的移动距离和运动方向，由此，可根据Tn+1时刻对应的感知结果ATn+1，对比上一时刻Tn时刻的感知结果ATn即可确定人在房间的移动轨迹。
实施例二，如图11所示，以目标物体为人，Tn时刻房间没有人，但Tn+1时刻房间有人的情况下为例。
发射机BS和接收机BR完成时钟同步后，发射机BS在设定的时间和无线资源上发射多径信号，其中，发射机BS的坐标为PBS，接收机BR的坐标为PBR。假设接收机BR接收到多径信号，接收机BR接收多径信号并分析计算多天线接收的多径信号的时域冲击响应，根据冲击响应序列，确定多径信号的到达时间ti，以及ti分布的冲击响应的时间区间，然后在根据多径信号到达时间的冲击响应对应所在的时间区间结合MUSIC算法获取多天线数据计算的到每条径信号的达到角度αi，其中i为多径数的编号，i大于等于1。
以接收机BR的坐标为PBR为原点，以第i条多径为例，根据接收到多径信号的到达角度αi在已有的房间地图空间进行延伸出虚拟直线，直到虚拟直线与房间内墙所在界面产生第一个虚拟交点处，该虚拟交点即为多径信号在房间地图环境的反射点，通过房间地图空间可以获取该反射点坐标为Pi，并计算Pi与接收机BR的距离di,1，以及Pi与发射机BS的距离di,2。 其中，di,1＝|PBR-Pi|，di,2＝|PBS-Pi|。计算目标物体到接收机BR的实际物理距离Di,1和目标物体到发射机BS与目标物体到接收机BR的距离之和Di。
根据判决条件分类环境反射径和移动物体反射径，确定多径信号的反射径属性，即可以根据Di、di,1、di,2构成的判决条件确定多径信号的反射径属性Si。若Di＝di,1+di,2，反射径属性归为S1；若Di<di,1+di,2，反射径属性归为S2；若Di>di,1+di,2，反射径属性归为S3。如图2所示，若反射径属性为S1时，即目标物体的坐标位置和地图空间反射点位置坐标Pi一致，即并记录本次感知结果为如图3所示，若反射径属性为S2时，即目标物体的坐标位置和地图空间反射点位置坐标Pi不一致，此时刻目标物体的位置坐标为并记录本次感知结果为 需要说明的是，对于多径信号的反射径属性Si为S1，同样可以采取公式来计算得到，且其计算出来的结果
不断重复上述过程，得到不同时刻的感知结果并进行比较Tn+1时刻对应的感知结果ATn+1和Tn时刻对应的感知结果ATn。若Tn时刻之前的感知结果ATn、ATn-1、ATn-2…都一致，表示Tn之前的没有人进入房间，因此，Tn时刻之前感知结果基本一致。当Tn+1时刻有人进入时，此时，Tn+1时刻对应的感知结果ATn+1对比上一Tn时刻的感知结果ATn有变化，即可确定有人在Tn+1时刻进入房间，并可根据Tn+1时刻之后的感知结果进一步记录房间内人的移动轨迹。
如图12所示，本申请实施例还提供了一种接收机。
具体地，该接收机包括：一个或多个处理器110和存储器120，图12中以一个处理器110及存储器120为例。处理器110和存储器120可以通过总线或者其他方式连接，图12中以通过总线连接为例。
存储器120作为一种非暂态计算机可读存储介质，可用于存储非暂态软件程序以及非暂态性计算机可执行程序，如上述本申请实施例中的感知方法。处理器110通过运行存储在存储器120中的非暂态软件程序以及程序，从而实现上述本申请实施例中的感知方法。
存储器120可以包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需要的应用程序；存储数据区可存储执行上述本申请实施例中的感知方法所需的数据等。此外，存储器120可以包括高速随机存取存储器，还可以包括非暂态存储器，例如至少一个磁盘存储器件、闪存器件、或其他非暂态固态存储器件。在一些实施方式中，存储器120可选包括相对于处理器110远程设置的存储器，这些远程存储器可以通过网络连接至该终端。上述网络的实例包括但不限于互联网、企业内部网、局域网、移动通信网及其组合。
实现上述本申请实施例中的感知方法所需的非暂态软件程序以及程序存储在存储器120中，当被一个或者多个处理器110执行时，执行上述本申请实施例中的感知方法，例如，执行以上描述图1B中的方法步骤S101至步骤S104，图6中的方法步骤S601至步骤S603，图7中的方法步骤S701至步骤S703，图8中的方法步骤S801至步骤S802，图9中的方法步骤 S901至步骤S905，接收机根据不同时刻接收到的多径信号确定多径信号在不同时刻的到达时间和到达角度；根据不同时刻的到达时间和到达角度确定多径信号在不同时刻的反射径属性；根据不同时刻的到达时间、到达角度和反射径属性得到在不同时刻对当前环境的感知结果；根据不同时刻的感知结果确定当前环境是否发生变化。因此，接收机对不同时刻接收到的多径信号进行分析计算，得到多径信号在不同时刻的到达时间和到达角度，再根据不同时刻的到达时间和到达角度确定多径信号在不同时刻的反射径属性，并根据不同时刻的到达时间、到达角度和反射径属性得到在不同时刻对当前环境的感知结果，将当前时刻的感知结果和上一时刻的感知结果进行比较，从而确定当前环境是否发生变化。基于此，相比于现有技术，通过对不同时刻接收到的多径信号进行分析，从而能够在多径环境下利用多径信号对当前环境实现感知。
此外，本申请实施例还提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机可执行程序，该计算机可执行程序被一个或多个控制处理器执行，例如，被图12中的一个处理器110执行，可使得上述一个或多个处理器110执行上述本申请实施例中的感知方法，例如，执行以上描述的图1B中的方法步骤S101至步骤S104，图6中的方法步骤S601至步骤S603，图7中的方法步骤S701至步骤S703，图8中的方法步骤S801至步骤S802，图9中的方法步骤S901至步骤S905，根据不同时刻接收到的多径信号确定多径信号在不同时刻的到达时间和到达角度；根据不同时刻的到达时间和到达角度确定多径信号在不同时刻的反射径属性；根据不同时刻的到达时间、到达角度和反射径属性得到在不同时刻对当前环境的感知结果；根据不同时刻的感知结果确定当前环境是否发生变化。因此，对不同时刻接收到的多径信号进行分析计算，得到多径信号在不同时刻的到达时间和到达角度，再根据不同时刻的到达时间和到达角度确定多径信号在不同时刻的反射径属性，并根据不同时刻的到达时间、到达角度和反射径属性得到在不同时刻对当前环境的感知结果，将当前时刻的感知结果和上一时刻的感知结果进行比较，从而确定当前环境是否发生变化。基于此，相比于现有技术，通过对不同时刻接收到的多径信号进行分析，从而能够在多径环境下利用多径信号对当前环境实现感知。
本领域普通技术人员可以理解，上文中所公开方法中的全部或某些步骤、系统可以被实施为软件、固件、硬件及其适当的组合。某些物理组件或所有物理组件可以被实施为由处理器，如中央处理器、数字信号处理器或微处理器执行的软件，或者被实施为硬件，或者被实施为集成电路，如专用集成电路。这样的软件可以分布在计算机可读介质上，计算机可读介质可以包括计算机存储介质(或非暂时性介质)和通信介质(或暂时性介质)。如本领域普通技术人员公知的，术语计算机存储介质包括在用于存储信息(诸如计算机可读程序、数据结构、程序模块或其他数据)的任何方法或技术中实施的易失性和非易失性、可移除和不可移除介质。计算机存储介质包括但不限于RAM、ROM、EEPROM、闪存或其他存储器技术、CD-ROM、数字多功能盘(DVD)或其他光盘存储、磁盒、磁带、磁盘存储或其他磁存储装置、或者可以用于存储期望的信息并且可以被计算机访问的任何其他的介质。此外，本领域普通技术人员公知的是，通信介质通常包含计算机可读程序、数据结构、程序模块或者诸如载波或其他传输机制之类的调制数据信号中的其他数据，并且可包括任何信息递送介质。

Claims (24)

  1. 一种感知方法，包括：
    根据不同时刻接收到的多径信号确定所述多径信号在不同时刻的到达时间和到达角度；
    根据不同时刻的所述到达时间和所述到达角度确定所述多径信号在不同时刻的反射径属性；
    根据不同时刻的所述到达时间、所述到达角度和所述反射径属性得到在不同时刻对当前环境的感知结果；
    根据不同时刻的所述感知结果确定所述当前环境是否发生变化。
  2. 根据权利要求1所述的方法，其中，所述根据不同时刻的所述到达时间和所述到达角度确定所述多径信号在不同时刻的反射径属性，包括：
    根据不同时刻的所述到达角度确定所述多径信号在预设地图环境不同时刻的反射点位置；
    根据不同时刻的所述反射点位置、发射机在所述地图环境的位置、接收机在所述地图环境的位置、不同时刻的所述到达时间确定所述多径信号在不同时刻的反射径属性。
  3. 根据权利要求2所述的方法，其中，所述根据不同时刻的所述到达角度确定所述多径信号在预设地图环境不同时刻的反射点位置，包括：
    以所述接收机为坐标原点，根据不同时刻的所述到达角度对所述多径信号在所述地图环境的空间进行延伸，直到所述多径信号与所述地图环境中建筑物界面产生第一个虚拟交点处，所述第一个虚拟交点即为所述多径信号在所述地图环境不同时刻的反射点位置。
  4. 根据权利要求2所述的方法，其中，所述根据不同时刻的所述反射点位置、所述发射机在所述地图环境的位置、所述接收机在所述地图环境的位置、不同时刻的所述到达时间确定所述多径信号在不同时刻的反射径属性，包括：
    计算不同时刻的所述反射点位置与所述接收机在所述地图环境的位置之间的距离值，得到第一距离值；
    计算不同时刻的所述反射点位置与所述发射机在所述地图环境的位置之间的距离值，得到第二距离值；
    根据所述到达时间与光速之积计算得到第三距离值，其中，所述第三距离值为目标物体与所述发射机在所述地图环境的位置之间的距离值以及所述目标物体与所述接收机在所述地图环境的位置之间的距离值之和；
    将所述第三距离值与所述第一距离值和所述第二距离值之和进行比较，得到比较结果；
    根据所述比较结果定所述多径信号在不同时刻的反射径属性。
  5. 根据权利要求4所述的方法，其中，所述根据所述比较结果定所述多径信号在不同时刻的反射径属性，包括：
    在所述比较结果为第三距离值等于所述第一距离值和所述第二距离值之和的情况下，确定所述多径信号在当前时刻的所述反射径属性为第一反射径，所述第一反射径用于表征所述多径信号经过环境一次反射的无线径。
  6. 根据权利要求5所述的方法，其中，所述根据所述比较结果定所述多径信号在不同时刻的反射径属性，包括：
    在所述比较结果为第三距离值小于所述第一距离值和所述第二距离值之和的情况下，确 定所述多径信号在当前时刻的所述反射径属性为第二反射径，所述第二反射径用于表征所述多径信号经过环境中移动物体的一次反射径。
  7. 根据权利要求6所述的方法，其中，所述根据所述比较结果定所述多径信号在不同时刻的反射径属性，包括：
    在所述比较结果为第三距离值大于所述第一距离值和所述第二距离值之和的情况下，确定所述多径信号在当前时刻的所述反射径属性为第三反射径，所述第三反射径用于表征所述多径信号经过环境或者移动物体多次反射的无线径。
  8. 根据权利要求7所述的方法，其中，所述根据不同时刻的所述到达时间、所述到达角度和所述反射径属性得到在不同时刻对当前环境的感知结果，包括：
    在确定所述反射径属性为第一反射径的情况下，所述感知结果为所述目标物体在当前时刻的坐标位置与所述反射点位置一致。
  9. 根据权利要求8所述的方法，其中，所述根据不同时刻的所述到达时间、所述到达角度和所述反射径属性得到在不同时刻对当前环境的感知结果，包括：
    在确定所述反射径属性为第二反射径的情况下，所述感知结果为根据当前时刻的所述反射点位置、所述接收机在所述地图环境的位置和第四距离值确定所述目标物体在当前时刻的坐标位置，其中，所述第四距离值为所述目标物体与所述接收机之间的实际物理距离。
  10. 根据权利要求9所述的方法，其中，所述根据当前时刻的所述反射点位置、所述接收机在所述地图环境的位置和第四距离值确定所述目标物体在当前时刻的坐标位置，包括：
    所述目标物体在当前时刻的坐标位置由如下公式得到：
    其中，为目标物体在当前时刻的坐标位置坐标，Di,1为第四距离值，Pi为当前时刻的所述反射点位置坐标，PBR为所述接收机在所述地图环境的位置坐标。
  11. 根据权利要求10所述的方法，其中，所述根据不同时刻的所述到达时间、所述到达角度和所述反射径属性得到在不同时刻对当前环境的感知结果，包括：
    在确定所述反射径属性为第三反射径的情况下，所述感知结果为所述目标物体在当前时刻的坐标位置无解或者没有稳定解。
  12. 根据权利要求11所述的方法，其中，所述根据不同时刻的所述感知结果确定所述当前环境是否发生变化，包括：
    在当前时刻的所述感知结果和上一时刻的所述感知结果一致的情况下，确定所述当前环境没有发生变化。
  13. 根据权利要求11所述的方法，其中，所述根据不同时刻的所述感知结果确定所述当前环境是否发生变化，包括：
    在当前时刻的所述感知结果和上一时刻的所述感知结果不一致的情况下，确定所述当前环境发生变化。
  14. 根据权利要求13所述的方法，其中，所述在当前时刻的所述感知结果和上一时刻的所述感知结果不一致的情况下，确定所述当前环境发生变化，包括:
    在当前时刻的所述感知结果和上一时刻的所述感知结果不一致的情况下，确定所述当前环境出现所述目标物体或者所述目标物体在所述当前环境发生移动。
  15. 根据权利要求14所述的方法，其中，在所述在当前时刻的所述感知结果和上一时刻的所述感知结果不一致的情况下，确定所述当前环境出现所述目标物体或者所述目标物体在所述当前环境发生移动之后，还包括：
    在所述目标物体在所述当前环境发生移动的情况下，根据所述目标物体在当前时刻的坐标位置和所述目标物体在上一时刻的坐标位置，确定所述目标物体的移动轨迹。
  16. 根据权利要求1所述的方法，其中，在所述根据不同时刻接收到的多径信号确定所述多径信号在不同时刻的到达时间和到达角度之前，还包括：
    对发射机和接收机进行同步矫正，以实现时钟同步。
  17. 根据权利要求1所述的方法，其中，所述根据不同时刻接收到的多径信号确定所述多径信号在不同时刻的到达时间和到达角度，包括：
    计算不同时刻接收到的所述多径信号的时域冲击响应，得到冲击响应序列；
    根据冲击响应序列确定所述到达时间以及所述到达时间的时域冲击响应对应所在的时间区间；
    根据所述时间区间确定所述多径信号中每条径信号的所述到达角度，其中，所述到达角度包括俯仰角和方位角。
  18. 根据权利要求17所述的方法，其中，所述时域冲击响应由接收机接收的多径信号和发射机发射的多径信号做时域数学处理而得到。
  19. 根据权利要求17所述的方法，其中，所述时域冲击响应由接收机接收的多径信号从时域变换到频域，对所述多径信号的各个第一子载波数据乘以发射机发射的多径信号的频域数据的共轭，得到各个第二子载波数据，再对各个所述第二子载波数据变换到时域而得到。
  20. 根据权利要求17所述的方法，其中，所述时间区间为时域响应能量或频域响应能量超过预设门限的最小采样点时间和最大采样点时间构成的区间。
  21. 根据权利要求17所述的方法，其中，所述根据所述时间区间确定所述多径信号中每条径信号的所述到达角度，包括：
    获取接收机的多天线数据，分析每条径信号的所述到达角度；
    根据每条径信号的所在时域时间读取每条天线的信道冲击响应对应的时域时间的数据；
    对每条天线的信道冲击响应对应的时域时间的数据进行多径角度计算，得到每条径信号的所述俯仰角和所述方位角。
  22. 根据权利要求1至21任意一项所述的方法，其中，所述多径信号为正交频分复用信号或者线性调频信号。
  23. 一种接收机，包括：存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，所述处理器执行所述计算机程序时实现如权利要求1至22任意一项所述的感知方法。
  24. 一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令用于执行权利要求1至22任意一项所述的感知方法。
PCT/CN2023/083778 2022-07-19 2023-03-24 感知方法、接收机及存储介质 Ceased WO2024016708A1 (zh)

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