Measurement method, device, measurement equipment and readable storage medium

Abstract

The present application discloses a measurement method, an apparatus, a measurement device and a readable storage medium, which belong to the field of communication technology. The measurement method of the embodiment of the present application includes: the measurement device adopts a first measurement mode to measure the communication perception integrated ISAC channel, obtain measurement data, and process the measurement data to obtain the reflection multipath parameter of the perception target of the ISAC channel.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to a measurement method, an apparatus, a measurement device, and a readable storage medium. Background Art

[0002] With the development of communication technology, Integrated Sensing and Communication (ISAC) is expected to integrate wireless sensing into large-scale mobile networks, which are called Perceptive Mobile Networks (PMNs). Perceptive Mobile Networks can provide both communication and wireless sensing services, and due to their large broadband coverage and powerful infrastructure, they have the potential to become a ubiquitous wireless sensing solution. However, the measurement of ISAC channels in the scenario of integrated sensing and communication is still unclear. Therefore, how to achieve the measurement of ISAC channels is an urgent problem to be solved. Summary of the invention

[0003] The embodiments of the present application provide a measurement method, an apparatus, a measurement device, and a readable storage medium, which can solve the problem of how to implement the measurement of an ISAC channel.

[0004] In a first aspect, a measurement method is provided, comprising:

[0005] The measuring device adopts a first measuring mode to measure the ISAC channel and obtain measurement data;

[0006] The measuring device processes the measurement data to obtain the reflection multipath parameters of the sensing target of the ISAC channel.

[0007] In a second aspect, a measuring device is provided, comprising:

[0008] A measurement module, configured to measure the ISAC channel using a first measurement method to obtain measurement data;

[0009] The processing module is used to process the measurement data to obtain the reflection multipath parameters of the sensing target of the ISAC channel.

[0010] In a third aspect, a measuring device is provided, comprising a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method described in the first aspect.

[0011] In a fourth aspect, a measurement device is provided, including a processor and a communication interface, wherein the processor is used to adopt a first measurement method to measure the ISAC channel, obtain measurement data, and process the measurement data to obtain the reflection multipath parameters of the perception target of the ISAC channel.

[0012] In a fifth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented.

[0013] In a sixth aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the steps of the method described in the first aspect.

[0014] In a seventh aspect, a computer program / program product is provided, wherein the computer program / program product is stored in a non-volatile storage medium, and the program / program product is executed by at least one processor to implement the steps of the method described in the first aspect.

[0015] In the embodiment of the present application, the measuring device can adopt the first measuring method to measure the ISAC channel, obtain the measurement data, and process the measurement data to obtain the reflection multipath parameter of the sensing target of the ISAC channel. Thus, the measurement of the ISAC channel can be realized, so as to find out the sensing channel characteristics in the ISAC channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a block diagram of a wireless communication system to which the embodiments of the present application can be applied;

[0017] Figure 2 is a flow chart of a measurement method provided in an embodiment of the present application;

[0018] Figure 3 is a block diagram of an ISAC channel measurement system in an embodiment of the present application;

[0019] Figure 4 is a three-dimensional schematic diagram of measuring a multipath cluster of a reflector in an embodiment of the present application;

[0020] Figure 5A and Figure 5B is a schematic diagram of a non-target path and a multipath reserved area in an embodiment of the present application;

[0021] Figure 6 is a structural schematic diagram of a measuring device provided in an embodiment of the present application;

[0022] Figure 7It is a structural schematic diagram of a measuring device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0024] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first" and "second" are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally represents that the objects associated with each other are in an "or" relationship.

[0025] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the systems and radio technologies mentioned above as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following descriptions, but these technologies can also be applied to applications other than NR system applications, such as the 6th generation (6 th Generation, 6G) communication system.

[0026] Figure 1 A block diagram of a wireless communication system applicable to the embodiments of the present application is shown. The wireless communication system includes a terminal 11 and a network side device 12. Among them, the terminal 11 can also be called a terminal device or a user terminal (User Equipment, UE), and the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), augmented reality (augmented reality, AR) / virtual reality (virtual reality, VR) equipment, a robot, a wearable device (Wearable Device), a vehicle-mounted device (VUE), a pedestrian terminal (PUE), a smart home (home equipment with wireless communication function, such as a refrigerator, a television, a washing machine or furniture, etc.) and other terminal side devices, and the wearable device includes: a smart watch, a smart bracelet, a smart headset, a smart glasses, smart jewelry (smart bracelet, smart bracelet, smart ring, smart necklace, smart anklet, smart anklet, etc.), a smart wristband, a smart clothing, a game console, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 can be a base station or a core network, wherein the base station can be referred to as a node B, an evolved node B, an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a B node, an evolved B node (eNB), a home B node, a home evolved B node, a WLAN access point, a WiFi node, a transmitting and receiving point (Transmitting Receiving Point, TRP) or some other suitable term in the field. As long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary.

[0027] In order to facilitate understanding of the embodiments of the present application, the following contents are first described.

[0028] In the embodiment of the present application, communication perception integration can also be called synaesthesia integration.

[0029] Machine learning, especially deep learning technology, further promotes the potential of non-dedicated radio signals for radar sensing. With these technologies, traditional radar is moving towards more general wireless sensing. Wireless sensing here can broadly refer to retrieving information from received radio signals instead of communication data modulated into the signal at the transmitter. For wireless sensing related to sensing the location of the target, the dynamic parameters such as target signal reflection delay, angle of arrival (AoA), angle of departure (AoD), Doppler, etc. can be estimated through common signal processing methods. For sensing the physical characteristics of the target, it can be achieved by measuring the device, object, inherent pattern signals, etc. These two sensing methods can be called perception parameter estimation and pattern recognition, respectively. In this sense, wireless sensing refers to more general sensing technologies and applications using radio signals.

[0030] The wireless channel is the propagation medium of wireless signals. The normal operation of any wireless communication system depends on a good wireless channel. When a signal propagates in space, due to the reflection, scattering and diffraction of electromagnetic waves, the so-called multipath effect will occur, that is, the same signal sample will be reflected and scattered by the anti-scatterer and reach the receiver multiple times with different delays and angles. Since the propagation paths of the signals are of different lengths, these signals arrive at the receiver with different delays and energies. This multipath superposition may cause inter-code interference and affect the communication quality. In addition, the wireless channel will not only have dispersion characteristics in the delay dimension, but also angular dispersion in space. This is not only due to the multipath propagation of the signal, but also the anti-scattering characteristics of the anti-scatterer in the wireless channel to the radio wave. For example, when a multipath signal encounters a specific anti-scatterer during propagation, such as a wall or a building, the rough surface of the object will cause the multipath signal to further diverge, resulting in a cluster of multipath observed in this direction at the receiver. Therefore, in order to accurately characterize the wireless channel, the multipath signals in the above angle and delay dimensions need to be measured.

[0031] In the embodiment of the present application, the ISAC channel includes not only the communication channel but also the perception channel, which is the wireless channel experienced by the perception signal. In other words, the ISAC channel refers to the final channel including the communication channel and the perception channel.

[0032] Communication channel refers to a traditional wireless communication channel, whose multipath is caused by the propagation environment.

[0033] The sensing channel refers to a channel formed by the multipath cluster of the sensing target. The multipath cluster of the sensing target is a reflection multipath cluster formed by the reflection multipath caused by the sensing target.

[0034] It should be noted that the multipath cluster in the embodiment of the present application is the same concept as the "cluster", which is a set of sub-paths with similar multipath parameters (generally delay, angle, etc.). The sub-path is the multipath with the smallest granularity that can be resolved by the measurement device.

[0035] In the embodiment of the present application, the perception target may also be referred to as a measurement target, a measurement reflector or a reflector.

[0036] In the embodiment of the present application, the transmitting array is an antenna array connected to a detection (sounding) signal transmitter (such as a vector signal generator), which may be a planar array. The receiving array is an antenna array connected to a detection (sounding) signal receiver (such as a vector signal analyzer), which may be a planar array.

[0037] The following, in conjunction with the accompanying drawings, describes in detail the measurement method, apparatus, measurement device and readable storage medium provided in the embodiments of the present application through some embodiments and their application scenarios.

[0038] See also Figure 2 , Figure 2 is a flow chart of a measurement method provided in an embodiment of the present application, the method is performed by a measurement device, such as Figure 2 As shown, the method comprises the following steps:

[0039] Step 21: The measuring device measures the ISAC channel using the first measuring method to obtain measurement data.

[0040] In this embodiment, the first measurement mode can be set based on actual test requirements, and is not limited thereto. Measuring the ISAC channel can also be called sounding the ISAC channel, and the receiver stores the received signal data.

[0041] Step 22: The measuring device processes the measured data to obtain the reflection multipath parameters of the sensing target of the ISAC channel.

[0042] Optionally, the reflected multipath parameters of the perceived target may include but are not limited to at least one of the following: multipath complex amplitude, delay, departure azimuth (Azimuth of Departure, AOD), departure elevation (Elevation of Departure, EOD), arrival azimuth (Azimuth of Arrival, AOA) and arrival elevation (Elevation of Arrival, EOA), etc.

[0043] The measurement method of the embodiment of the present application can adopt a first measurement mode to measure the ISAC channel, obtain measurement data, and process the measurement data to obtain the reflection multipath parameters of the sensing target of the ISAC channel. Thus, the measurement of the ISAC channel can be achieved, thereby exploring the sensing channel characteristics in the ISAC channel.

[0044] In the embodiment of the present application, considering that the ISAC channel is a wireless channel between a transmitter and a receiver, the position, height, etc. of the transmit array (Tx array) and / or the receive array (Rx array) are measurement results of the ISAC channel. Therefore, when setting the first measurement mode, it can be set based on the relevant content of the transmit array and / or the receive array.

[0045] Optionally, the first measurement method may include at least one of the following:

[0046] 1) Fix the transmitting array at the first measurement point and change the measurement point of the receiving array in turn around the sensing target, or fix the receiving array at the second measurement point and change the measurement point of the transmitting array in turn around the sensing target. In this way, the reflection multipath parameters of the sensing target at different observation angles can be obtained, thereby obtaining the reflection path statistical characteristics of the sensing target at different observation angles, including the power fading characteristics of the reflection path, the angle expansion of the reflection path, the delay expansion characteristics, etc.

[0047] Optionally, the first measurement point is a pre-selected fixed point. In some embodiments, the transmitting array may be placed at a pre-selected fixed point, and the receiving array may be rotated 360° around the sensing target.

[0048] Optionally, the second measurement point is a pre-selected fixed point. In some embodiments, the receiving array can be placed at a pre-selected fixed point, and the transmitting array can be rotated 360° around the sensing target.

[0049] 2) Interchange the measurement points of the transmitting array and the receiving array. In this way, the channel data under ISAC channel reciprocity can be obtained.

[0050] 3) When the transmitting array and the receiving array are placed at a given measurement point, the sensing target is rotated at a preset angle step until the sensing target rotates 360°. In this way, the reflection multipath parameters of the sensing target in different directions can be obtained, thereby obtaining the reflection path statistical characteristics of the sensing target in different directions, including the power fading characteristics of the reflection path, the angle expansion of the reflection path, the delay expansion characteristics, etc.

[0051] Optionally, the preset angle may be set based on actual test requirements, such as 2° or 5°, etc., and is not limited thereto.

[0052] 4) sequentially changing the measurement radius of the transmitting array and the perceived target, and / or sequentially changing the measurement radius of the receiving array and the perceived target. In this way, the reflection multipath parameters of the perceived target at different measurement radii can be obtained, thereby exploring the dependence of the reflection multipath parameters of the perceived target on the measurement radius.

[0053] It should be noted that the measurement radius between the transmitting array and the sensing target can be understood as the distance between the transmitting array and the sensing target. The measurement radius between the receiving array and the sensing target can be understood as the distance between the receiving array and the sensing target.

[0054] For the measurement radius between the transmitting array and the sensing target and the measurement radius between the receiving array and the sensing target, the two measurement radii can be the same or different. However, when the receiving array changes the measurement point position around the sensing target, it is necessary to ensure that the distance between the receiving array and the sensing target is fixed, that is, the measurement point position of the receiving array is on the circumference of the circle with the sensing target as the center. In addition, when the transmitting array changes the measurement point position around the sensing target, it is necessary to ensure that the distance between the transmitting array and the sensing target is fixed, that is, the measurement point position of the transmitting array is on the circumference of the circle with the sensing target as the center.

[0055] 5) The height of the transmitting array and / or receiving array is changed in sequence. In this way, the reflection multipath parameters of the sensing target at different heights of the transmitting / receiving array can be obtained, thereby exploring the dependence of the reflection multipath parameters of the sensing target on the height of the transmitting / receiving array.

[0056] For example, see Figure 3 As shown, Figure 3 A block diagram of the ISAC channel measurement system in an embodiment of the present application is given. Among them, the measurement target (reflector) can be some common perception targets in the ISAC scene, such as human body, transportation tools (such as bicycles, cars), etc. The broadband vector signal generator is used as a transmitter to send a detection signal. The detection signal can adopt a pseudo-random sequence with good autocorrelation performance, or a multi-carrier orthogonal frequency division multiplexing (OFDM) signal with a reduced peak-to-average power ratio. The channel estimate between the Tx array and the Rx array can be obtained through the detection signal. The broadband vector signal analyzer is used as a receiver to receive the detection signal after passing through the channel to be measured, and can store and export the received signal data. The function of the offline data processing terminal is to analyze the measurement signal data and extract the channel parameters through a series of signal processing algorithms.

[0057] In order to maintain synchronization between the transmitter and the receiver, the broadband vector signal generator and the broadband vector signal analyzer can be connected by cable or optical fiber, and the two share the same clock source on the transmitter or receiver side (a high-precision rubidium clock can be connected externally). If the distance between the transmitter and the receiver is far, resulting in excessive loss of the synchronization cable or optical fiber, the transmitter and the receiver can also be connected to high-precision rubidium clocks respectively. The pair of rubidium clocks are tamed by the timing synchronization signal of the Global Positioning System (GPS) to maintain synchronization.

[0058] In order to keep the receiver sampling time synchronized, a trigger signal cable / optical fiber can also be connected between the transmitter and the receiver to allow the transmitter to transmit a trigger signal for sending a detection signal to the receiver. The trigger signal is sent at the same time as the detection signal, and the receiver can collect data based on the trigger signal.

[0059] like Figure 3 As shown, the transmitting end can use a transmitting array combined with a high-speed switching switch to implement multiple-input multiple-output (MIMO) signal transmission, that is, send the detection signal in the form of time division multiplexing (TDM) to achieve orthogonality of multi-channel signals in the time domain. Similarly, the receiving end can also use a receiving array combined with a high-speed switching switch to implement MIMO signal reception. Optionally, if you only care about the single-input single-output SISO / single-input multiple-output SIMO / multiple-input single-output MISO channel characteristics, the corresponding transmitting / receiving array + high-speed switching switch can also be changed to a single antenna, or only one of the MIMO antenna channel data can be selected for later data processing.

[0060] like Figure 3 As shown, the specific measurement steps may include:

[0061] S1: The Tx array is fixed at measurement point #1, the Rx array is placed at measurement point #1, channel sounding is performed, and the receiver stores the received signal data;

[0062] S2: Step by preset angles, rotate the measurement target in place, and repeat S1 until the measurement target rotates 360°;

[0063] S3: The Rx array is placed at measurement point #2 to perform channel detection, and the receiver stores the received MIMO signal data;

[0064] S4: Step by preset angle, rotate the measurement target in place, and repeat S3 until the measurement target rotates 360°;

[0065] S5: Similarly, the Rx array is placed at measurement points #3 to #16 in sequence, and the measurement target is rotated in situ at a preset angle step to perform channel detection. The receiver stores the received MIMO signal data.

[0066] Among them, when measuring at each point, multiple channel samples should be collected continuously to facilitate subsequent data processing, such as noise suppression or improving algorithm performance.

[0067] Before / after S1 to S5, background back-to-back measurement is required, that is, the transmitter and receiver are directly connected through the antenna RF cable, or the transmitter and receiver are directly connected through the antenna RF cable and RF attenuator to measure the system response excluding the antenna array. In addition, the antenna array pattern also needs to be measured and obtained in advance.

[0068] In addition, during the test, due to channel reciprocity, the Tx array and the Rx array in the above S1 to S5 can be interchanged.

[0069] Optionally, in order to find out the dependence of the reflection multipath parameters of the sensing target on the measurement radius R, the measurement radius R may be changed and the above S1 to S5 may be repeated. In order to find out the dependence of the reflection multipath parameters of the sensing target on the Tx / Rx array height, the Tx / Rx array height may be changed and the above S1 to S5 may be repeated.

[0070] In the embodiment of the present application, in order to ensure the measurement effect, the measurement configuration of the transmitting array and the receiving array related to the ISAC channel can meet at least one of the following:

[0071] 1) The height of the transmitting array and / or receiving array is determined based on the transmitting antenna or transmitting array in the application scenario to meet the actual situation of signal transmission and reception. And / or, the height of the transmitting array and / or receiving array is determined based on the height of the receiving antenna or receiving array in the application scenario to meet the actual situation of signal transmission and reception.

[0072] For example, in a vehicle-to-vehicle (V2V) interawareness integration scenario, since it is communication perception between vehicles, the height of the Tx array and the Rx array is the common vehicle antenna height, such as about 1.5-2.0m. In a vehicle-to-infrastructure (V2I) interawareness integration scenario, since it is communication perception between vehicles and roadside units, the height of the Tx array and the Rx array is the roadside unit height, such as about 5-15m.

[0073] 2) The aperture of the transmitting array and / or the receiving array is determined based on the aperture of the transmitting array in the application scenario to meet the actual situation of signal transmission and reception. And / or, the aperture of the transmitting array and / or the receiving array is determined based on the aperture of the receiving array in the application scenario to meet the actual situation of signal transmission and reception.

[0074] 3) The transmitting array and / or receiving array uses a dual-polarization antenna to obtain the polarization characteristics of the ISAC channel.

[0075] 4) The minimum measurement radius is related to the aperture of the transmitting array and / or the receiving array; wherein the minimum measurement radius is the minimum value of the distance from the transmitting array to the sensing target, or the minimum measurement radius is the minimum value of the distance from the receiving array to the sensing target. In this way, the minimum measurement radius can be used to ensure that the channel measurement meets the far-field condition.

[0076] Optionally, the minimum measurement radius may be determined based on the Rayleigh distance formula. min The following conditions are met:

[0077]

[0078] Among them, L tx represents the aperture of the transmitting array, L rx represents the aperture of the receiving array, and λ is the carrier wavelength of the measurement signal.

[0079] In addition, in order to ensure the measurement effect, in addition to the above measurement configuration, the measurement configuration involved in the embodiment of the present application may also include at least one of the following:

[0080] 5) Test scene: You can choose an open and flat outdoor environment or a large indoor microwave darkroom. The purpose of selecting the test scene in this way is at least to: i. eliminate environmental clutter; ii. meet the far-field conditions; iii. ensure that the AOA and AOD are approximately equal when the transmitter and receiver are at the same position.

[0081] 6) Transceiver antenna array type: Both the transmitting array and the receiving array use a planar array combined with a high-speed switching switch. The planar array can use a dipole antenna with a patch to ensure that the backward radiation gain is small.

[0082] 7) Channel measurement equipment: The transmitter uses a broadband vector signal generator, and the receiver uses a vector signal analyzer, with clock synchronization and test trigger signal cables connected between the two. The synchronization signal and trigger signal cables can be coaxial cables or optical fibers.

[0083] 8) Other configurations 1: Configure the measurement carrier frequency, measurement bandwidth, subcarrier spacing, etc. according to the model application scenario.

[0084] 9) Other configuration 2: Ensure R ≥ R in the measurement radius min In this case, the transmit power of the transmitter is determined to ensure that the receiving end has a good signal-to-noise ratio (SNR) and dynamic range.

[0085] 10) Other configuration 3: Considering the measurement time, model accuracy requirements, etc., determine the number of measurement points, measurement target rotation angle step, etc.

[0086] Optionally, when the measuring device processes the measurement data, the processing process may include: first, calculating the wireless channel response information (also referred to as: wireless channel response) between the transmitting array and the receiving array based on the measurement data; then, extracting the reflection multipath parameters of the perceived target from the wireless channel response information.

[0087] In some embodiments, the wireless channel response information includes both the response of the wireless channel and the response of the antenna array. For example, the wireless channel response information may include frequency domain channel response information.

[0088] For example, assuming that the transmitted signal is X(f), the back-to-back measurement has the following condition (1):

[0089] Y ref (f) = X(f)H TX (f)H ref (f)H RX (f) (1)

[0090] Among them, Y ref (f) is the received signal during back-to-back measurement, H ref (f) is the direct cable transmission response, H TX (f) represents the transmitter transmission response, H RX (f) represents the receiver transmission response.

[0091] In addition, when measuring the channel, the following condition (2) is met:

[0092] Y(f)=X(f)H TX (f)H(f)H RX (f) (2)

[0093] Among them, Y(f) is the received signal during channel measurement, and H(f) represents the wireless channel response.

[0094] Combining equations (1) and (2), the wireless channel response can be expressed as equation (3):

[0095]

[0096] In some embodiments, after calculating the wireless channel response information between the transmitting array and the receiving array, some commonly used high-precision multipath parameter estimation algorithms, such as the SAGE algorithm, the ESPRIT algorithm, the MUSIC algorithm, etc., can be used to extract the multipath complex amplitude, delay, departure azimuth angle AOD, departure elevation angle EOD, arrival azimuth angle AOA and / or arrival elevation angle EOA in the environment. The above multipath complex amplitude can contain amplitude and phase information, and the square of the modulus can obtain the multipath power. In addition, it is necessary to use the antenna array data measured in advance to calibrate the antenna response.

[0097] In an embodiment of the present application, since in the perception measurement of the ISAC channel, reflectors of non-perception targets such as the ground may produce some reflection paths, thereby affecting the measurement of the perception target, after obtaining the measurement data of the ISAC channel, some reflection multipath parameters that do not meet the requirements can be eliminated by determining the multipath retention area of ​​the perception target.

[0098] Optionally, after obtaining the reflection multipath parameters through measurement, the measuring device can determine the multipath reservation area of ​​the perception target according to the size of the perception target and the distance between the perception target and the transmitting array and / or the receiving array; then, the parameters of the reflection path outside the multipath reservation area are eliminated from the obtained reflection multipath parameters, that is, the multipath outside the multipath reservation area is eliminated to obtain the reflection path only from the perception target, thereby accurately obtaining the reflection multipath parameters of the perception target.

[0099] Optionally, the multipath reserved area may be defined as: an overlapped area of ​​a first range and a second range; wherein the first range is a maximum departure angle range obtained by observing the perceived target from the transmitting side; and the second range is a maximum arrival angle range obtained by observing the perceived target from the receiving side. That is, the overlapped area of ​​the maximum departure angle range and the maximum arrival angle range is the multipath reserved area.

[0100] Optionally, for the reflection path caused by the sensing target, its propagation delay also has a certain range, which is approximately the propagation time of the speed of light at 2 times the measurement radius. Therefore, when eliminating non-target paths, multipath delay information can also be combined to eliminate those multipaths with a large difference from the theoretical delay.

[0101] Combine the following Figure 4 , Figure 5A and Figure 5B The multipath reserved area in this embodiment is described.

[0102] Figure 4A three-dimensional schematic diagram of the multipath cluster of the measuring reflector in the embodiment of the present application is given to facilitate the description of the multipath retention area and the elimination of non-target paths. Since there may be non-perceived targets, i.e., non-target reflectors, such as the ground, in the environment, the measurement channel includes all multipaths of both the target and non-target reflectors. The reflection path caused by the measuring target (perceived target) will only be Figure 4 The square frame propagates to the area between the Tx and Rx arrays respectively, so the corresponding maximum departure angle range and maximum arrival angle range can be determined according to the size of the measurement radius R, the actual size of the measurement target and the height of the Tx / Rx array, and then the multipath retention area and the multipath components that need to be retained are determined. Figure 4 In the figure, the range of box area 1 represents the maximum departure angle range on the Tx side, that is, if the multipath signals leaving the transmitting array want to reach the measurement target, their departure azimuth (AOD) and departure elevation (EOD) can only fall within the range of box area 1. Similarly, there is also a corresponding maximum arrival angle range for the receiving array. If the multipath signals reach the receiving array after being reflected by the measurement target, their arrival azimuth (AOA) and arrival elevation (EOA) can only fall within the maximum arrival angle range. Figure 4 In the figure, the elliptical area 2 is the reflection cluster area caused by the environment.

[0103] Figure 5A and Figure 5B A schematic diagram of the non-target path and multipath reserved area in an embodiment of the present application is given. Figure 5A and Figure 5B Box 1, box 2 and box 3 in the figure represent the maximum departure angle range, the maximum arrival angle range and the multipath reservation area respectively. Only the multipath that falls within the maximum departure angle range and the maximum arrival angle range at the same time is considered to be the reflection path caused by the measurement target. Strictly speaking, since the shape of the measurement target is not necessarily regular, the maximum departure angle range and the maximum arrival angle range are within Figure 5A and Figure 5B The two-dimensional coordinate system shown is not necessarily a rectangle as shown in the figure, but should be the target outline in the Tx and Rx observation directions respectively. In order to reduce the complexity of data processing, a square area can be used as an approximation of the maximum departure angle range and the maximum arrival angle range.

[0104] It should be noted that the measuring method provided in the embodiment of the present application can be executed by a measuring device or a control module in the measuring device for executing the measuring method. The measuring device provided in the embodiment of the present application is described by taking the measuring device executing the measuring method as an example.

[0105] See also Figure 6 , Figure 6is a schematic diagram of a structure of a measuring device provided in an embodiment of the present application, and the device is applied to measuring equipment, such as Figure 6 As shown, the measuring device 60 comprises:

[0106] The measuring module 61 is used to measure the ISAC channel by adopting a first measuring method to obtain measurement data;

[0107] The processing module 62 is used to process the measurement data to obtain the reflection multipath parameters of the sensing target of the ISAC channel.

[0108] Optionally, the first measurement method includes at least one of the following:

[0109] Fixing the transmitting array at a first measuring point and sequentially changing the measuring point of the receiving array around the sensing target, or fixing the receiving array at a second measuring point and sequentially changing the measuring point of the transmitting array around the sensing target;

[0110] Interchange the measurement points of the transmitting array and the receiving array;

[0111] When the transmitting array and the receiving array are placed at a given measuring point, the sensing target is rotated by a preset angle step until the sensing target is rotated 360°;

[0112] sequentially changing the measurement radius of the transmitting array and the sensing target, and / or sequentially changing the measurement radius of the receiving array and the sensing target;

[0113] The height of the transmitting array and / or the receiving array is changed sequentially.

[0114] Optionally, the first measuring point is a pre-selected fixed point;

[0115] And / or, the second measuring point is a pre-selected fixed point.

[0116] Optionally, the measurement configuration of the transmitting array and the receiving array related to the ISAC channel satisfies at least one of the following:

[0117] The height of the transmitting array and / or the receiving array is determined based on the height of the transmitting antenna or the transmitting array in the application scenario;

[0118] The height of the transmitting array and / or the receiving array is determined based on the height of the receiving antenna or the receiving array in the application scenario;

[0119] The aperture of the transmitting array and / or the receiving array is determined based on the aperture of the transmitting array in the application scenario;

[0120] The aperture of the transmitting array and / or the receiving array is determined based on the aperture of the receiving array in the application scenario;

[0121] The minimum measurement radius is related to the aperture of the transmitting array and / or the receiving array; wherein the minimum measurement radius is the minimum value of the distance from the transmitting array to the sensing target, or the minimum measurement radius is the minimum value of the distance from the receiving array to the sensing target;

[0122] The transmitting array and / or the receiving array adopts a dual-polarized antenna.

[0123] Optionally, the minimum measurement radius R min The following conditions are met:

[0124]

[0125] Among them, L tx represents the aperture of the transmit array, L rx represents the aperture of the receiving array, and λ is the carrier wavelength of the measurement signal.

[0126] Optionally, the processing module 62 includes:

[0127] A calculation unit, configured to calculate wireless channel response information between the transmitting array and the receiving array according to the measurement data;

[0128] An extraction unit is used to extract the reflected multipath parameter from the wireless channel response information.

[0129] Optionally, the measuring device 60 further includes:

[0130] A determination module, configured to determine a multipath reservation area of ​​the perception target according to a size of the perception target and a distance between the perception target and a transmitting array and / or a receiving array;

[0131] The elimination module is used to eliminate the parameters of the reflection path outside the multipath reserved area from the reflection multipath parameters.

[0132] Optionally, the multipath retention area is: an overlapping area of ​​a first range and a second range; wherein the first range is a maximum departure angle range obtained by observing the perceived target from a transmitting side; and the second range is a maximum arrival angle range obtained by observing the perceived target from a receiving side.

[0133] Optionally, the reflection multipath parameter includes at least one of the following:

[0134] Multipath complex amplitude, time delay, departure azimuth, departure elevation angle, arrival azimuth, arrival elevation angle.

[0135] The measuring device in the embodiment of the present application can be a device, a device or electronic device with an operating system, or a component, an integrated circuit, or a chip in a terminal. The device or electronic device can be a mobile terminal or a non-mobile terminal. Exemplary, the mobile terminal can include but is not limited to the types of terminals 11 listed above, and the non-mobile terminal can be a server, a network attached storage (Network Attached Storage, NAS), a personal computer (personalcomputer, PC), a television (television, TV), a teller machine or a self-service machine, etc., which is not specifically limited in the embodiment of the present application.

[0136] The measurement 60 provided in the embodiment of the present application can achieve Figure 2 The various processes implemented by the method embodiment and achieving the same technical effect are not described here to avoid repetition.

[0137] Optional, such as Figure 7 As shown, an embodiment of the present application also provides a measuring device 70, including a processor 71, a memory 72, and a program or instruction stored in the memory 72 and executable on the processor 71. When the program or instruction is executed by the processor 71, each process of the above-mentioned measurement method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0138] The embodiment of the present application also provides a measurement device, including a processor and a communication interface, wherein the processor is used to adopt a first measurement mode to measure an ISAC channel, obtain measurement data, and process the measurement data to obtain the reflection multipath parameter of the sensing target of the ISAC channel. The measurement device embodiment can implement each process of the above-mentioned measurement method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0139] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, each process of the above-mentioned measurement method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0140] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0141] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, which is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned measurement method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0142] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0143] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0144] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network-side device, etc.) to execute the methods described in each embodiment of the present application.

[0145] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A measurement method, characterized in that: include: The measuring device adopts the first measuring method to measure the communication perception integrated ISAC channel to obtain measurement data; The measuring device processes the measurement data to obtain a reflection multipath parameter of a sensing target of the ISAC channel; The first measurement method includes at least one of the following: Fixing the transmitting array at a first measuring point and sequentially changing the measuring point of the receiving array around the sensing target, or fixing the receiving array at a second measuring point and sequentially changing the measuring point of the transmitting array around the sensing target; Interchange the measurement points of the transmitting array and the receiving array; sequentially changing the measurement radius of the transmitting array and the sensing target, and / or sequentially changing the measurement radius of the receiving array and the sensing target; sequentially changing the height of the transmitting array and / or the receiving array; Wherein, the method further comprises: The measuring device determines the multipath reservation area of ​​the sensing target according to the size of the sensing target and the distance between the sensing target and the transmitting array and / or the receiving array; The measuring device removes the parameters of the reflection paths outside the multipath reserved area from the reflection multipath parameters.

2. The method according to claim 1, characterized in that The first measurement method also includes: When the transmitting array and the receiving array are placed at a given measuring point, the sensing target is rotated by stepping at a preset angle until the sensing target is rotated 360°.

3. The method according to claim 1, characterized in that The first measuring point is a pre-selected fixed point; and / or, The second measuring point is a pre-selected fixed point.

4. The method according to claim 1, characterized in that The measurement configuration of the transmit array and the receive array associated with the ISAC channel satisfies at least one of the following: The height of the transmitting array and / or the receiving array is determined based on the height of the transmitting antenna or the transmitting array in the application scenario; The height of the transmitting array and / or the receiving array is determined based on the height of the receiving antenna or the receiving array in the application scenario; The aperture of the transmitting array and / or the receiving array is determined based on the aperture of the transmitting array in the application scenario; The aperture of the transmitting array and / or the receiving array is determined based on the aperture of the receiving array in the application scenario; The minimum measurement radius is related to the aperture of the transmitting array and / or the receiving array; wherein the minimum measurement radius is the minimum value of the distance from the transmitting array to the sensing target, or the minimum measurement radius is the minimum value of the distance from the receiving array to the sensing target; The transmitting array and / or the receiving array adopts a dual-polarized antenna.

5. The method according to claim 4, characterized in that The minimum measuring radius R min The following conditions are met: Among them, L tx represents the aperture of the transmit array, L rx represents the aperture of the receiving array, and λ is the carrier wavelength of the measurement signal.

6. The method according to claim 1, characterized in that The processing of the measurement data to obtain the reflection multipath parameter of the sensing target of the ISAC channel includes: Calculating wireless channel response information between the transmitting array and the receiving array according to the measurement data; The reflected multipath parameter is extracted from the wireless channel response information.

7. The method according to claim 1, characterized in that The multipath reservation area is: the overlapping area of ​​the first range and the second range; wherein the first range is the maximum departure angle range obtained by observing the perceived target from the transmitting side; and the second range is the maximum arrival angle range obtained by observing the perceived target from the receiving side.

8. The method according to claim 1, characterized in that The reflection multipath parameter includes at least one of the following: Multipath complex amplitude, time delay, departure azimuth, departure elevation angle, arrival azimuth, arrival elevation angle.

9. A measuring device, characterized in that: include: A measurement module, configured to measure the ISAC channel using a first measurement method to obtain measurement data; A processing module, used for processing the measurement data to obtain reflection multipath parameters of the sensing target of the ISAC channel; The first measurement method includes at least one of the following: Fixing the transmitting array at a first measuring point and sequentially changing the measuring point of the receiving array around the sensing target, or fixing the receiving array at a second measuring point and sequentially changing the measuring point of the transmitting array around the sensing target; Interchange the measurement points of the transmitting array and the receiving array; sequentially changing the measurement radius of the transmitting array and the sensing target, and / or sequentially changing the measurement radius of the receiving array and the sensing target; sequentially changing the height of the transmitting array and / or the receiving array; Wherein, the device further comprises: A determination module, configured to determine a multipath reservation area of ​​the perception target according to a size of the perception target and a distance between the perception target and a transmitting array and / or a receiving array; The elimination module is used to eliminate the parameters of the reflection path outside the multipath reserved area from the reflection multipath parameters.

10. The device according to claim 9, characterized in that The first measurement method also includes: When the transmitting array and the receiving array are placed at a given measuring point, the sensing target is rotated by stepping at a preset angle until the sensing target is rotated 360°.

11. The device according to claim 9, characterized in that The first measuring point is a pre-selected fixed point; and / or, The second measuring point is a pre-selected fixed point.

12. The device according to claim 9, characterized in that The measurement configuration of the transmit array and the receive array associated with the ISAC channel satisfies at least one of the following: The height of the transmitting array and / or the receiving array is determined based on the height of the transmitting antenna or the transmitting array in the application scenario; The height of the transmitting array and / or the receiving array is determined based on the height of the receiving antenna or the receiving array in the application scenario; The aperture of the transmitting array and / or the receiving array is determined based on the aperture of the transmitting array in the application scenario; The aperture of the transmitting array and / or the receiving array is determined based on the aperture of the receiving array in the application scenario; The minimum measurement radius is related to the aperture of the transmitting array and / or the receiving array; wherein the minimum measurement radius is the minimum value of the distance from the transmitting array to the sensing target, or the minimum measurement radius is the minimum value of the distance from the receiving array to the sensing target; The transmitting array and / or the receiving array adopts a dual-polarized antenna.

13. The device according to claim 12, characterized in that The minimum measuring radius R min The following conditions are met: Among them, L tx represents the aperture of the transmit array, L rx represents the aperture of the receiving array, and λ is the carrier wavelength of the measurement signal.

14. The device according to claim 9, characterized in that The processing module comprises: A calculation unit, configured to calculate wireless channel response information between the transmitting array and the receiving array according to the measurement data; An extraction unit is used to extract the reflected multipath parameter from the wireless channel response information.

15. The device according to claim 9, characterized in that The multipath reservation area is: the overlapping area of ​​the first range and the second range; wherein the first range is the maximum departure angle range obtained by observing the perceived target from the transmitting side; and the second range is the maximum arrival angle range obtained by observing the perceived target from the receiving side.

16. The device according to claim 9, characterized in that The reflection multipath parameter includes at least one of the following: Multipath complex amplitude, time delay, departure azimuth, departure elevation angle, arrival azimuth, arrival elevation angle.

17. A measuring device, characterized in that The method comprises a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the measurement method according to any one of claims 1 to 8.

18. A readable storage medium, characterized in that: The readable storage medium stores a program or instruction, and when the program or instruction is executed by a processor, the steps of the measurement method according to any one of claims 1 to 8 are implemented.

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