WO2023015556A1 - Procédé et appareil de détermination de distance, dispositif, et support de stockage - Google Patents

Procédé et appareil de détermination de distance, dispositif, et support de stockage Download PDF

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Publication number
WO2023015556A1
WO2023015556A1 PCT/CN2021/112491 CN2021112491W WO2023015556A1 WO 2023015556 A1 WO2023015556 A1 WO 2023015556A1 CN 2021112491 W CN2021112491 W CN 2021112491W WO 2023015556 A1 WO2023015556 A1 WO 2023015556A1
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impulse response
distance
communication device
target
amplitude
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PCT/CN2021/112491
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English (en)
Chinese (zh)
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WO2023015556A8 (fr
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高宁
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Oppo广东移动通信有限公司
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Priority to PCT/CN2021/112491 priority Critical patent/WO2023015556A1/fr
Priority to CN202180097907.2A priority patent/CN117280236A/zh
Publication of WO2023015556A1 publication Critical patent/WO2023015556A1/fr
Publication of WO2023015556A8 publication Critical patent/WO2023015556A8/fr

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    • 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

Definitions

  • the present application relates to the field of mobile communication, and in particular to a distance determination method, device, equipment and storage medium.
  • Bluetooth distance measurement technology has been widely used, and any two communication devices that support Bluetooth technology can measure the distance by sending and receiving carrier signals.
  • any communication device of the two communication devices receives the carrier signal sent by the other communication device, determines the phase difference between the received carrier signal and the local clock signal, and can subsequently The distance between the two communication devices is determined from the phase difference.
  • the obstacle will refract the carrier signal, resulting in a change in the transmission path, and thus the distance determined based on the phase difference cannot accurately reflect the distance between the two communication devices .
  • Embodiments of the present application provide a distance determination method, device, device, and storage medium, which eliminates the path loss included in the first distance due to the refraction of the carrier signal by obstacles, so that the corrected second distance and The actual distance between the two communication devices is close, which improves the accuracy of the determined distance between the first communication device and the second communication device. Described technical scheme is as follows:
  • a distance determination method is provided, the method is executed by a first communication device, and the method includes:
  • the first distance is determined based on at least one first phase difference, each of the first phase differences received by the first communication device
  • a first carrier signal is determined with the local clock signal of the first communication device, and the first carrier signal is sent by the second communication device;
  • the channel impulse response indicating the transmission quality of at least one of the first carrier signals
  • the first distance is corrected to obtain a second distance.
  • a distance determination device comprising:
  • a distance acquiring module configured to acquire a first distance between the first communication device and the second communication device, the first distance is determined based on at least one first phase difference, each of the first phase differences is determined by the A first carrier signal received by the first communication device is determined from a local clock signal of the first communication device, and the first carrier signal is sent by the second communication device;
  • a determining module configured to determine a channel impulse response based on the amplitude and the first phase difference corresponding to at least one of the first carrier signals, the channel impulse response indicating the transmission quality of at least one of the first carrier signals;
  • a correction module configured to correct the first distance based on the channel impulse response to obtain a second distance.
  • a first communication device includes: a processor; a transceiver connected to the processor; a memory for storing executable instructions of the processor ; Wherein, the processor is configured to load and execute the executable instructions to implement the distance determination method as described in the above aspect.
  • a computer-readable storage medium wherein executable program code is stored in the readable storage medium, and the executable program code is loaded and executed by a processor to implement the above-mentioned aspect. method of determining the distance.
  • a chip is provided, the chip includes a programmable logic circuit and/or program instructions, and when the chip is run on a communication device, it is used to implement the distance determination method as described in the above aspect .
  • a computer program product is provided.
  • the computer program product is executed by a processor of a communication device, it is used to implement the distance determination method described in the above aspect.
  • a computer program executed by a processor of a communication device, so as to implement the distance determination method described in the above aspect.
  • the first communication device After the first communication device obtains the first distance, it determines the channel impulse response according to the amplitude and the first phase difference corresponding to at least one first carrier signal, because the channel impulse response indicates that the first carrier
  • the transmission quality of the signal, and the transmission quality of the first carrier signal is affected by the transmission path of the carrier signal, so correcting the first distance based on the channel impulse response can eliminate the impact on the first distance due to the refraction of the carrier signal by obstacles The effect is to improve the accuracy of the determined distance between the first communication device and the second communication device.
  • Fig. 1 shows a block diagram of a communication system provided by an exemplary embodiment of the present application.
  • Fig. 2 shows a flowchart of a distance determination method provided by an exemplary embodiment of the present application.
  • Fig. 3 shows a flowchart of a distance determination method provided by an exemplary embodiment of the present application.
  • Fig. 4 shows a flowchart of a method for determining a channel impulse response provided by an exemplary embodiment of the present application.
  • Fig. 5 shows a structural diagram of the amplitude corresponding to each first carrier signal provided by an exemplary embodiment of the present application.
  • Fig. 6 shows a structural diagram of a first phase difference corresponding to each first carrier signal provided by an exemplary embodiment of the present application.
  • Fig. 7 shows a structure diagram of a channel impulse response provided by an exemplary embodiment of the present application.
  • Fig. 8 shows a flowchart of a distance determination method provided by an exemplary embodiment of the present application.
  • Fig. 9 shows a schematic diagram of a distance between a first communication device and a second communication device provided by an exemplary embodiment of the present application.
  • Fig. 10 shows a block diagram of an apparatus for determining distance provided by an exemplary embodiment of the present application.
  • Fig. 11 shows a block diagram of a distance determining device provided by an exemplary embodiment of the present application.
  • Fig. 12 shows a schematic structural diagram of a communication device provided by an exemplary embodiment of the present application.
  • FIG. 1 shows a block diagram of a communication system provided by an exemplary embodiment of the present application, and the communication system may include: a first communication device 12 and a second communication device 13 .
  • the first communication device 12 and the second communication device 13 may comprise access terminals, subscriber units, subscriber stations, mobile stations, mobile stations, remote stations, remote terminals, mobile devices, wireless communication devices, user agents, or user equipment.
  • the terminal device 13 can also be a cellular phone, a cordless phone, a SIP (Session Initiation Protocol, session initiation protocol) phone, a WLL (Wireless Local Loop, wireless local loop) station, a PDA (Personal Digital Assistant, personal digital processing) , handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5GS (5th Generation System, fifth-generation mobile communication system) or future evolution of PLMN (Public Land Mobile Network, public land mobile communication network) terminal equipment, etc., this embodiment of the present application is not limited to this.
  • the devices mentioned above are collectively referred to as communication devices.
  • a Bluetooth connection can be made between the first communication device 12 and the second communication device 13
  • the communication system described in the embodiment of this application is to illustrate the technical solution of the embodiment of the application more clearly, and does not constitute a limitation to the technical solution provided by the embodiment of the application.
  • Those of ordinary skill in the art know that with the evolution of the communication system, The technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.
  • Fig. 2 shows a flowchart of a distance determination method provided by an exemplary embodiment of the present application, which is applied to the communication device shown in Fig. 1, and the method includes at least some of the following contents:
  • Step 201 The first communication device acquires a first distance between the first communication device and the second communication device.
  • the first distance is determined based on at least one first phase difference.
  • Each first phase difference is determined by a first carrier signal received by the first communication device and a local clock signal of the first communication device, and the first carrier signal is sent by the second communication device.
  • the first carrier signal is an unmodulated carrier signal.
  • a Bluetooth connection is established between the first communication device and the second communication device, and communication between the first communication device and the second communication device can be performed based on the Bluetooth connection.
  • the first communication device may send a carrier signal to the second communication device through the Bluetooth connection, or the second communication device may send the second phase difference to the first communication device through the Bluetooth connection, or the first communication device and the second communication device may Other information may also be transmitted between the two communication devices through the Bluetooth connection, which is not limited in this embodiment of the present application.
  • the first communication device sends the second carrier signal to the second communication device
  • the second communication device receives the second carrier signal
  • the second phase difference is sent to the first communications device.
  • the first communication device acquires at least one first phase difference, and based on the at least one first phase difference, the first distance between the first communication device and the second communication device may be determined.
  • the first distance is determined based on the first phase difference and the second phase difference.
  • the first communication device acquires at least one first phase difference and at least one second phase difference, and determines the first distance based on the at least one first phase difference and the at least one second phase difference.
  • the second phase difference is determined by a second carrier signal received by the second communication device and a local clock signal of the second communication device, and the second carrier signal is sent by the first communication device.
  • the second carrier signal is an unmodulated carrier signal.
  • Step 202 The first communication device determines a channel impulse response based on the amplitude and the first phase difference corresponding to at least one first carrier signal.
  • the channel impulse response indicates the transmission quality of at least one first carrier signal.
  • the carrier signal will be attenuated due to the influence of the transmission path during the transmission process, resulting in a reduction in the transmission quality of the carrier signal. Therefore, after the first communication device receives the first carrier signal from the second communication device, The transmission quality of the first carrier signal is reduced, and the amplitude of the first carrier signal is also reduced.
  • the first communication device may obtain the amplitude and the first phase difference corresponding to at least one first carrier signal, and obtain an indication indicating at least A channel impulse response of the transmission quality of a first carrier signal.
  • Step 203 The first communication device corrects the first distance based on the channel impulse response to obtain the second distance.
  • the channel impulse response indicates the transmission quality of the first carrier signal, and since the first carrier signal is refracted by obstacles during transmission, the transmission quality of the first carrier signal is affected by the transmission path, Therefore, correcting the first distance based on the channel impulse response can eliminate the influence on the first distance caused by the refraction of the first carrier signal by the obstacle and the transmission path change, and obtain the second distance.
  • the first communication device after the first communication device obtains the first distance, it determines the channel impulse response according to the amplitude and the first phase difference corresponding to at least one first carrier signal, because the channel impulse response indicates that the first carrier signal , and the transmission quality of the first carrier signal is affected by the transmission path of the carrier signal, so the correction of the first distance based on the channel impulse response can eliminate the influence of the refraction of the carrier signal by obstacles on the first distance , improving the accuracy of the determined distance between the first communication device and the second communication device.
  • FIG. 2 illustrates how the first communication device corrects the first distance.
  • the first communication device needs to first determine the first distance between the first communication device and the second communication device.
  • the following describes how the first communication device determines the first distance.
  • Fig. 3 shows a flowchart of a distance determination method provided by an exemplary embodiment of the present application. Referring to Fig. 3, the method includes:
  • Step 301 The first communication device sends a second carrier signal of a first frequency to a second communication device.
  • phase of the carrier signal of the first frequency is the same as the phase of the local clock signal of the first communication device.
  • Step 302 The second communication device receives the second carrier signal of the first frequency, and obtains a second phase difference between the received second carrier signal of the first frequency and a local clock signal of the second communication device.
  • the second communication device samples the received second carrier signal of the first frequency and the local clock signal of the second communication device, and determines the second phase difference based on the sampled sampling data.
  • the second phase difference may also be referred to as a phase compensation value.
  • the manner of sampling the received second carrier signal of the first frequency includes IQ (In-phase Quadrature, in-phase quadrature) sampling, intermediate frequency sampling, radio frequency sampling or other types of sampling manners. Examples are not limited.
  • Step 303 the second communication device sends the first carrier signal of the first frequency to the first communication device.
  • phase of the first carrier signal of the first frequency is the same as the phase of the local clock signal of the second communication device.
  • Step 304 The first communication device receives the first carrier signal of the first frequency, and acquires a first phase difference between the received first carrier signal of the first frequency and a local clock signal of the first communication device.
  • the first communication device samples the received first carrier signal of the first frequency and the local clock signal of the first communication device, and determines the first phase difference based on the sampled sampling data.
  • the first phase difference may also be referred to as a phase compensation value.
  • the manner of sampling the received first carrier signal of the first frequency includes IQ sampling, intermediate frequency sampling, radio frequency sampling or other types of sampling manners, which are not limited in this embodiment of the present application.
  • Step 305 the second communication device sends the second phase difference to the first communication device.
  • step 303 is only described by performing step 303 first and then performing step 305 as an example.
  • step 305 may be performed first, and then steps 303-304 are performed.
  • the present application The embodiment does not limit the execution sequence of step 303 and step 305 .
  • Step 306 The first communication device acquires a first sum value of the first phase difference and the second phase difference.
  • the phase of the second carrier signal of the first frequency When the second carrier signal of the first frequency is transmitted from the first communication device to the second communication device, the phase of the second carrier signal will shift, and the phase of the local clock signal of the first communication device is different from that of the second communication device.
  • the phases of the local clock signals of the devices may also be different, so the second phase difference acquired in the embodiment of the present application includes the phase offset value caused by the transmission of the second carrier signal and the local clock signal between the first communication device and the second communication device.
  • the phase offset value of the clock signal
  • the phase of the first carrier signal of the first frequency When the first carrier signal of the first frequency is transmitted from the second communication device to the first communication device, the phase of the first carrier signal will shift, and the phase of the local clock signal of the first communication device is different from that of the second communication device.
  • the phases of the local clock signals of the devices may also be different, so the first phase difference obtained in the embodiment of the present application includes the phase offset value caused by the transmission of the first carrier signal and the local clock signal between the first communication device and the second communication device.
  • the phase offset value of the clock signal
  • both the first phase difference and the second phase difference include the phase offset value of the local clock signal between the first communication device and the second communication device, so the first phase difference and the second phase difference are obtained After calculating the first sum value of the difference, the phase offset value generated due to the different phases of the local clock signal can be eliminated, thereby preventing the accuracy rate from being affected by the phase offset value of the local clock signal when determining the first distance subsequently.
  • Step 307 The first communication device adjusts the first frequency according to frequency intervals to obtain a second frequency, the first communication device performs the above steps 301, 304 and 306 according to the second frequency, and the second communication device performs the above steps 302 and 306 according to the second frequency 303 and 305.
  • the frequency interval is set by the first communication device, or set by an operator, or set in other ways, which is not limited in the embodiment of the present application.
  • the frequency interval is 0.5 Hz, 1 Hz or other values, which is not limited in this embodiment of the present application.
  • the first communication device increases the frequency interval on the basis of the first frequency to obtain the second frequency, and then performs steps 301-306 in sequence according to the second frequency.
  • Step 308 The first communication device determines a first distance between the first communication device and the second communication device according to the determined multiple first sum values, the number of the multiple first sum values, the frequency interval, and the speed of light.
  • the first communication device obtains multiple first sum values according to different frequencies, and based on the ratio of the speed of light to the frequency interval, the difference between any two adjacent first sum values and the frequency A remainder calculation is performed on the ratio of the intervals, and the first distance between the first communication device and the second communication device is determined according to the average value of the acquired sums of the plurality of remainders.
  • the first distance between the first communication device and the second communication device is calculated using the following formula:
  • d is the first distance between the first communication device and the second communication device
  • N is the number of first sum values
  • f i -f i+1 is the frequency interval
  • ⁇ i is the ith first sum value
  • c is the speed of light.
  • FIG. 4 shows a flowchart of a method for determining a channel impulse response provided in an exemplary embodiment of the present application. Referring to FIG. 4 , the method includes:
  • Step 401 The first communication device performs inverse Fourier transform on the amplitude and the first phase difference of at least one first carrier signal to obtain at least one transform parameter.
  • the first communication device if it needs to determine the channel impulse response, it first performs an inverse Fourier transform on the amplitude and the first phase difference corresponding to at least one first carrier signal to obtain at least one transform parameter.
  • the first communication device before performing inverse Fourier transform on the amplitude and first phase difference corresponding to at least one first carrier signal, the first communication device first converts the amplitude and first phase difference corresponding to the same first carrier signal to Fusion is performed to obtain a signal parameter, and then inverse Fourier transform is performed on at least one signal parameter corresponding to the first carrier signal to obtain at least one transformation parameter.
  • the signal parameter is used to describe the amplitude and the first phase difference of the corresponding first carrier signal.
  • the amplitudes and first phase differences corresponding to the multiple first carrier signals are sorted according to the frequencies of the multiple first carrier signals, and then the amplitudes and first phase differences corresponding to the sorted multiple first carrier signals are sorted.
  • the phase difference is inversely transformed by Fourier to obtain the channel impulse response.
  • the array formed by the amplitudes and first phase differences corresponding to the sorted multiple first carrier signals may be referred to as a channel frequency response.
  • the amplitudes and first phase differences corresponding to the sorted multiple first carrier signals may form an array, and then inverse Fourier transform is performed on the array to obtain multiple transformation parameters.
  • the amplitudes and first phase differences of the multiple first carrier signals are arranged in ascending order of the frequencies of the first carrier signals, and the amplitudes and first phase differences of the sorted multiple first carrier signals A phase difference is subjected to inverse Fourier transform to obtain a plurality of transform parameters.
  • each first carrier signal in the plurality of first carrier signals corresponds to a frequency
  • the amplitudes and first phase differences corresponding to the first carrier signals are sorted according to the order of frequency from small to large, then the plurality of first carrier signals can be sorted.
  • a carrier signal is converted between the frequency dimension and the time domain dimension.
  • the arrangement order of the impulse response components included in the channel impulse response is determined by the order of the corresponding amplitudes and first phase differences of the plurality of first carrier signals.
  • the first communication device sorts the amplitudes and first phase differences corresponding to the multiple first carrier signals, it then determines the channel impulse response based on the amplitudes and first phase differences corresponding to the multiple first carrier signals.
  • the domain includes multiple impulse response components arranged in descending order of time.
  • the candidate impulse response component is an impulse response component whose amplitude is greater than that of the previous impulse response component and greater than the amplitude of the latter impulse response component
  • the amplitudes of the previous and subsequent impulse response components of the candidate impulse response component are the amplitudes generated after the frequency of the first carrier signal is shifted, and the amplitudes of the candidate impulse response components are larger than the previous and subsequent impulse response components , indicating that the amplitude of the candidate impulse response component is the amplitude generated by the frequency shift of the first carrier signal, so the candidate impulse response component can indicate that the first communication device receives the transmission of the carrier signal of the second communication device path.
  • the first communication device forms a complex number corresponding to the amplitude and the first phase difference of each first carrier signal among the multiple first carrier signals, and then compares the multiple first carrier signals according to the frequency of the multiple first carrier signals.
  • the complex numbers of the carrier signals are sorted, and Fourier inverse transform is performed on the sorted complex numbers of the first carrier signals to obtain multiple transformation parameters.
  • Step 402 The first communication device performs modulo acquisition on at least one transformation parameter to obtain a channel impulse response.
  • the first communication device performs inverse Fourier transform on the amplitude and the first phase difference corresponding to at least one first carrier signal to obtain at least one transformation parameter, and each transformation parameter is added to each first The amplitude corresponding to the carrier signal and the first phase difference, and the transformation parameter indicates the amplitude of the first carrier signal in the time domain dimension, so at least one transformation parameter is modulo taken to obtain the channel impulse response.
  • the first communication device fuses the amplitude and the first phase difference corresponding to the same first carrier signal to obtain a signal parameter, and performs inverse Fourier transform on the signal parameter corresponding to at least one first carrier signal, At least one transformation parameter is obtained.
  • the transformation parameter indicates the amplitude of the first carrier signal in the time domain dimension. Therefore, the channel impulse response can be obtained by performing modulo calculation on the at least one transformation parameter.
  • the amplitudes and the first phase differences corresponding to the plurality of first carrier signals form an array, the inverse Fourier transform is performed on this array to obtain at least one transformation parameter, and the at least one transformation parameter is modulo obtained to obtain Channel impulse response.
  • the inverse Fourier transform is performed on the array X(k), and the obtained channel impulse response also forms an array, which is expressed by the following formula:
  • N is the number of first carrier signals
  • X(k) is an amplitude and a first phase difference corresponding to the kth first carrier signal.
  • the first communication device receives 40 first carrier signals and determines the amplitude and first phase difference corresponding to each first carrier signal, as shown in Figure 5, the abscissa represents the frequency, and the ordinate represents the amplitude, as shown in Figure 5 5 shows the amplitude corresponding to the first carrier signal with frequency k. As shown in FIG. 6 , the abscissa represents frequency, and the ordinate represents amplitude. FIG. 6 shows the first phase difference corresponding to the first carrier signal with frequency k.
  • the first communication device determines the channel impulse response based on the amplitudes and first phase differences corresponding to the 40 first carrier signals.
  • the channel impulse response is shown in FIG. 7, the abscissa is time, and the ordinate is amplitude.
  • the channel impulse response includes 40 impulse response components, and each impulse response component includes time and amplitude.
  • the first communication device may perform an inverse Fourier transform on the amplitude and the first phase difference of at least one first carrier signal to determine the channel impulse response, so that the first communication device can The first distance is corrected based on the channel impulse response, and the path loss contained in the first distance due to the refraction of the carrier signal by the obstacle is eliminated, so that the corrected second distance and the distance between the two communication devices The actual distance is close, which improves the accuracy of the determined distance between the first communication device and the second communication device.
  • FIG. 2 describes how the first communication device corrects the first distance.
  • the channel impulse response includes multiple impulse response components, and the impulse response components include the time and the corresponding amplitude.
  • the first communication device needs to obtain the impulse response components that meet the requirements first, and then The impulse response component of the first distance is corrected.
  • the following describes how the first communication device meets the required impulse response component.
  • FIG. 8 shows a flow chart of a distance determination method provided by an exemplary embodiment of the present application. See Figure 8, the method includes:
  • Step 801 The first communication device acquires a target impulse response component whose amplitude is greater than a first reference threshold from a plurality of impulse response components.
  • the channel impulse response includes a plurality of impulse response components, and the impulse response components include the time and the corresponding amplitude, because the channel impulse response indicates that any communication device receives the signal of the carrier signal of another communication device quality, and the signal quality is affected by the transmission path of the carrier signal. Therefore, from the multiple impulse response components, the target impulse response component with an amplitude greater than the first reference threshold is obtained, and the first communication device can be based on the acquired target impulse response component. The first distance is corrected to eliminate the influence on the first distance caused by the refraction of the first carrier signal by the obstacle.
  • a candidate impulse response component is obtained based on a plurality of impulse response components, the amplitude of the candidate impulse response component is greater than the amplitude of the previous impulse response component of the candidate impulse response component, and greater than the amplitude of the subsequent impulse response of the candidate impulse response component The amplitude of the component is determined as the target impulse response component with the amplitude greater than the first reference threshold.
  • the amplitudes and first phase differences of the multiple first carrier signals are arranged in ascending order of the frequencies of the first carrier signals, and the amplitudes and first phase differences of the sorted multiple first carrier signals After a phase difference is inversely Fourier transformed, the conversion of multiple first carrier signals from the frequency dimension to the time domain dimension is completed, and the signal impulse response in the time domain includes multiple impulse responses arranged in order of time from small to large portion.
  • the candidate impulse response component is an impulse response component whose amplitude is greater than that of the previous impulse response component and greater than the amplitude of the subsequent impulse response component, and the previous impulse response component of the candidate impulse response component
  • the amplitude of the impulse response component is the amplitude produced by the frequency offset of the first carrier signal
  • the amplitude of the subsequent impulse response component of the candidate impulse response component is the amplitude produced by the frequency offset of the first carrier signal
  • the candidate impulse response component is the amplitude generated by the frequency shift of the first carrier signal, so the candidate impulse response component may indicate the transmission path through which the first communication device receives the carrier signal of the second communication device.
  • Step 802 The first communication device corrects the first distance based on the target impulse response component to obtain a second distance.
  • the first distance may be corrected to obtain the second distance.
  • the first distance is corrected based on the target impulse response component, the frequency interval, and the number of target impulse response components to obtain the second distance.
  • the frequency interval is an interval between frequencies corresponding to every two adjacent first phase differences.
  • the target impulse response component includes time and amplitude
  • the first communication device may correct the first distance based on the time and amplitude of the target impulse response component to obtain the second distance.
  • the multiple target impulse response components are sorted according to the order of the time of the target impulse response components from small to large, and based on the time and amplitude included in the sorted multiple target impulse response components, the first The distance is corrected to obtain the second distance.
  • the difference between the moment of each target impulse response component and the moment of the first target impulse response is obtained, and then the sum of the product of the amplitude of each target impulse response component and the corresponding difference is obtained, and the first distance,
  • the second distance is obtained by multiplying the obtained sum value, the number of target impulse response components, the frequency interval and the amplitude of the first target impulse response component, and the correction to the first distance is completed.
  • the second distance can be determined using the following formula:
  • the wall between the two communication devices will refract the carrier signal sent and received between the first communication device and the second communication device, so there will be a refraction transmission path for the carrier signal sent and received between the first communication device and the second communication device d 1 , that is, the first distance determined by the first communication device includes the influence of the two transmission paths d 0 and d 1 , after the first distance is corrected by the method in the embodiment of the present application, the refraction of d 1 can be eliminated The influence of the transmission path, so that the obtained second distance is d 0 the distance of the transmission path.
  • the embodiment of the present application is only described by taking the correction of the first distance directly based on the target impulse response component as an example.
  • the first communication device needs to first determine whether the acquired target impulse response components meet the requirements, and then determine whether to correct the first distance.
  • the first distance is corrected based on the target impulse response components to obtain the second distance.
  • the first preset number is set by the first communication device, or agreed upon by an agreement, or set by an operator, or set in other ways, which is not limited in this embodiment of the present application.
  • the first preset number is 1, 2 or other numerical values.
  • the first communication device determines that the number of target impulse response components is greater than the first preset number, it means that there is an obstacle between the first communication device and the second communication device, and the obstacle will affect the first communication device and the second communication device.
  • the refraction of the carrier signal transmitted between them causes the transmission path of the carrier signal to change, which in turn leads to the inaccuracy of the first distance determined by the first communication device. It is necessary to correct the first distance based on the target impulse response component to obtain the second distance.
  • the correction of the first distance is stopped.
  • the first communication device determines that the number of target impulse responses is not greater than the first preset number, it means that there is no obstacle between the first communication device and the second communication device, and the transmission between the first communication device and the second communication device
  • the carrier signal will not be refracted by obstacles, the first distance between the first communication device and the second communication device is similar to the distance between the two communication devices, and there is no need to correct the first distance.
  • the first preset number is set by the first communication device, or by an operator, or in other ways.
  • the first preset number is 1, 2 or other numerical values.
  • the first reference threshold is increased to obtain an increased second reference threshold, and the amplitude of the target impulse response components greater than For the target impulse response component of the second reference threshold, when the acquired target impulse response component is greater than the first preset quantity and not greater than the second preset quantity, the first distance is corrected based on the target impulse response component, Get the second distance.
  • the second preset number is greater than the first preset number, if the number of target impulse response components is greater than the second preset number, it means that the acquired target impulse response components may include amplitudes not generated by carrier signals sent by communication equipment, Therefore, it is necessary to increase the first reference threshold first to obtain the increased second reference threshold, and then obtain the target impulse response component whose amplitude is greater than the second reference threshold from the target impulse response component.
  • a preset amount is not greater than the second preset amount, the first distance is corrected based on the target impulse response component to obtain the second distance.
  • the second reference threshold If the number of target impulse response components whose amplitude is greater than the second reference threshold is still greater than the second preset number, continue to increase the second reference threshold to obtain the increased reference threshold, and then continue to obtain from the target impulse response components the target impulse response component whose amplitude is greater than the increased reference threshold, until the number of the target impulse response component is greater than the first preset number and not greater than the second preset number, based on the target impulse response component, the first distance is corrected, Get the second distance.
  • the first reference value can be increased on the basis of the first reference threshold to obtain the second reference threshold.
  • the first reference value is set by the first communication device, or is set by an agreement, or is set by an operator, or is set in other ways, which is not limited in this embodiment of the present application.
  • the first reference value may be 0.5, 1 or other values.
  • the target impulse response component in the embodiment of the present application does not meet the requirements, so the first distance that may be determined by the first communication device is also invalid.
  • the first reference threshold is reduced to obtain a reduced third reference threshold, and from the impulse response components of the channel impulse response, the amplitude greater than Based on the reduced target impulse response component of the third reference threshold, the step of correcting the first distance to obtain the second distance is performed based on the target impulse response component.
  • the first reference threshold is set too high, resulting in the inability to obtain target impulse response components greater than the first reference threshold from multiple impulse response components, so it is necessary to Decrease the first reference threshold to obtain the reduced third reference threshold. From the impulse response components of the channel impulse response, obtain the target impulse response component whose amplitude is greater than the third reference threshold, and then based on the target impulse response component, the first The first distance is corrected to obtain the second distance.
  • the first communication device still cannot obtain the target impulse response component with an amplitude greater than the third reference threshold from the impulse response components of the channel impulse response, continue to reduce the third reference threshold until the number of target impulse response components obtained is not zero , based on the target impulse response component, the first distance is corrected to obtain the second distance.
  • the second reference value can be reduced on the basis of the first reference threshold to obtain the third reference threshold.
  • the second reference value is set by the first communication device, or is set by an agreement, or is set by an operator, or is set in other ways, which is not limited in this embodiment of the present application.
  • the second reference value may be 0.5, 1 or other values.
  • Fig. 10 shows a block diagram of a distance determination device provided by an exemplary embodiment of the present application, the device includes:
  • a distance obtaining module 1001 configured to obtain a first distance between the first communication device and the second communication device, the first distance is determined based on at least one first phase difference, each first phase difference is received by the first communication device
  • the first carrier signal is determined by the local clock signal of the first communication device, and the first carrier signal is sent by the second communication device;
  • a determining module 1002 configured to determine a channel impulse response based on the amplitude and the first phase difference corresponding to the at least one first carrier signal, where the channel impulse response indicates the transmission quality of the at least one first carrier signal;
  • the correction module 1003 is configured to correct the first distance based on the channel impulse response to obtain the second distance.
  • the determining module 1002 includes:
  • a transformation unit 10021 configured to perform inverse Fourier transformation on the amplitude and the first phase difference of at least one first carrier signal to obtain at least one transformation parameter
  • a modulo taking unit 10022 configured to take a modulus of at least one transformation parameter to obtain a channel impulse response.
  • the channel impulse response includes a plurality of impulse response components
  • the impulse response components include time and corresponding amplitude
  • the correction module 1003 is configured to:
  • the first distance is corrected to obtain the second distance.
  • the amplitudes and first phase differences corresponding to the multiple first carrier signals are arranged in ascending order of the frequencies of the first carrier signals, and the order of the multiple impulse response components is corresponding to the multiple first carrier signals
  • the order of the amplitude and the first phase difference is determined, and the correction module 1003 is used for:
  • the amplitude of the candidate impulse response component is greater than the amplitude of the previous impulse response component of the candidate impulse response component, and greater than the amplitude of the subsequent impulse response component of the candidate impulse response component;
  • a candidate impulse response component whose amplitude is greater than a first reference threshold is determined as a target impulse response component.
  • the correction module 1003 is configured to correct the first distance based on the target impulse response component, the frequency interval and the quantity of the target impulse response component to obtain the second distance;
  • the frequency interval is an interval between frequencies corresponding to every two adjacent first phase differences.
  • the correction module 1003 is configured to correct the first distance based on the target impulse response components to obtain the second distance when the quantity of the target impulse response components is greater than the first preset quantity.
  • the device further includes:
  • a stopping module 1004 configured to stop correcting the first distance when the number of target impulse response components is not greater than a first preset number.
  • the correction module 1003 includes:
  • An increasing unit 10031 configured to increase the first reference threshold to obtain an increased second reference threshold when the number of target impulse response components is greater than a second preset number, and the second preset number is greater than the first preset set quantity;
  • An acquisition unit 10032 configured to acquire a target impulse response component whose amplitude is greater than a second reference threshold from the target impulse response components
  • Correction unit 10033 configured to correct the first distance based on the target impulse response component to obtain the second distance when the acquired target impulse response component is greater than the first preset quantity and not greater than the second preset quantity .
  • the device further includes:
  • a stop module 1004 configured to stop correcting the first distance when the number of target impulse response components is zero.
  • the device further includes:
  • a reduction module 1005, configured to reduce the first reference threshold to obtain a reduced third reference threshold when the number of target impulse response components is zero;
  • a component acquisition module 1006 configured to acquire, from the impulse response components of the channel impulse response, a target impulse response component whose amplitude is greater than the reduced third reference threshold;
  • the correction module 1003 is configured to execute the step of correcting the first distance based on the target impulse response component to obtain the second distance.
  • the first distance is further determined based on at least one second phase difference, each second phase difference is determined by a second carrier signal received by the second communication device and a local clock signal of the second communication device, the second A carrier signal is sent by the first communication device.
  • the division of the above-mentioned functional modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional modules according to the needs.
  • the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.
  • the device and the method embodiment provided by the above embodiment belong to the same idea, and the specific implementation process thereof is detailed in the method embodiment, and will not be repeated here.
  • FIG. 12 shows a schematic structural diagram of a first communication device provided by an exemplary embodiment of the present application.
  • the first communication device includes: a processor 1201 , a receiver 1202 , a transmitter 1203 , a memory 1204 and a bus 1205 .
  • the processor 1201 includes one or more processing cores, and the processor 1201 executes various functional applications and information processing by running software programs and modules.
  • the receiver 1202 and the transmitter 1203 can be realized as a communication component, and the communication component can be a communication chip.
  • the memory 1204 is connected to the processor 1201 through the bus 1205 .
  • the memory 1204 may be used to store at least one program code, and the processor 1201 is used to execute the at least one program code, so as to implement various steps in the foregoing method embodiments.
  • Memory 1204 can be realized by any type of volatile or nonvolatile storage device or their combination, and volatile or nonvolatile storage device includes but not limited to: magnetic disk or optical disk, EEPROM (Electrically Erasable Programmable Read Only Memory , Electrically Erasable Programmable Read Only Memory), EPROM (Erasable Programmable Read Only Memory, Erasable Programmable Read Only Memory), SRAM (Static Random Access Memory, Static Random Access Memory), ROM (Read Only Memory, Read-only memory), magnetic memory, flash memory, programmable read-only memory (Programmable Read Only Memory, PROM).
  • EEPROM Electrically Erasable Programmable Read Only Memory
  • EPROM Erasable Programmable Read Only Memory, Erasable Programmable Read Only Memory
  • SRAM Static Random Access Memory, Static Random Access Memory
  • ROM Read Only Memory, Read-only memory
  • magnetic memory flash memory
  • PROM programmable read-only memory
  • a computer-readable storage medium is also provided, and executable program code is stored in the readable storage medium, and the executable program code is loaded and executed by a processor to implement the implementation of each of the above methods.
  • the example provides a distance determination method performed by a communication device.
  • a chip in an exemplary embodiment, includes a programmable logic circuit and/or program instructions, and when the chip is run on a communication device, it is used to realize distance determination as provided in various method embodiments method.
  • a computer program product is provided, and when the computer program product is executed by a processor of a communication device, it is used to implement the distance determining method provided by each method embodiment above.
  • the program can be stored in a computer-readable storage medium.
  • the above-mentioned The storage medium mentioned may be a read-only memory, a magnetic disk or an optical disk, and the like.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

L'invention concerne un procédé et un appareil de détermination de distance, un dispositif, et un support de stockage, qui se rapportent au domaine des communications mobiles. Le procédé consiste à : acquérir une première distance, qui se trouve entre un premier dispositif de communication et un second dispositif de communication, la première distance étant déterminée sur la base d'au moins une première différence de phase, chaque première différence de phase étant déterminée au moyen d'un premier signal de porteuse, qui est reçu par le premier dispositif de communication, et d'un signal d'horloge local du premier dispositif de communication, et le premier signal de porteuse étant envoyé par le second dispositif de communication ; déterminer une réponse impulsionnelle de canal en se basant sur une amplitude correspondant à au moins un premier signal de porteuse, et la première différence de phase ; et corriger la première distance sur la base de la réponse impulsionnelle de canal, de manière à obtenir une seconde distance et éliminer une perte de trajet qui est générée en raison de la réfraction d'un signal de porteuse par un obstacle et qui est comprise dans la première distance, de sorte que la seconde distance corrigée soit proche de la distance réelle entre les deux dispositifs de communication, ce qui permet d'améliorer la précision de la distance déterminée entre le premier dispositif de communication et le second dispositif de communication.
PCT/CN2021/112491 2021-08-13 2021-08-13 Procédé et appareil de détermination de distance, dispositif, et support de stockage WO2023015556A1 (fr)

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CN202180097907.2A CN117280236A (zh) 2021-08-13 2021-08-13 距离确定方法、装置、设备及存储介质

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