Sensed target identification method and apparatus, sensing device, and storage medium

Abstract

The present application relates to the technical field of communications, and provides a sensed target identification method and apparatus, a sensing device, and a storage medium. An implementation solution is: sending a sensing reference signal to a sensing and communication environment, wherein a comb factor of the sensing reference signal is greater than a set value, an OFDM symbol in the sensing reference signal comprises NS time-domain sample points, and a cyclic prefix in the sensing reference signal comprises NCP time-domain sample points; detecting the sensing and communication environment to obtain a sensing echo signal, wherein the sensing echo signal is a signal reflected from the sensing reference signal by a sensed target in the sensing and communication environment; performing radio-frequency preprocessing on the sensing echo signal to obtain a first baseband signal, and deleting the first NS / 2 time-domain sample points and the last NCP time-domain sample points in the first baseband signal to obtain a second baseband signal; and identifying a distance between the sensed target and a sensing device on the basis of the second baseband signal. In this way, the sensing ranging range can be expanded, and it can be ensured that time-frequency resources of original systems are not wasted.

Description

Method, device, sensing device and storage medium for identifying a sensing target

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number "202410116615.4" filed by Datang Mobile Communications Equipment Co., Ltd. on January 26, 2024, with the invention name "Method, device, perception device and storage medium for identifying perception targets". Technical Field

[0003] The present application relates to the field of communication technology, and in particular to a method, apparatus, sensing device and storage medium for identifying a sensing target. Background Art

[0004] In the application of interawareness ranging in communication systems, the ranging range of the sensing target depends on the CP (Cyclic Prefix) length of the OFDM (Orthogonal Frequency Division Multiplexing) symbol in the sensing reference signal. For example, under the common 30 kHz subcarrier spacing configuration, the duration of the OFDM symbol is (microseconds), the typical CP length is 2.34us. When the transmission and reception are synchronized, the ranging range of the perceived target is about 350 meters.

[0005] If the ranging range of the perceived target is extended by extending the CP length of the original OFDM symbol, for example, by reducing the original 14 OFDM symbols in a time slot to 12 OFDM symbols, the CP length can be extended to approximately 8.33us and the ranging range can be extended to 1.25 kilometers.

[0006] However, the above-mentioned method of extending the ranging range sacrifices the time domain resources of two OFDM symbols, resulting in resource waste. Summary of the Invention

[0007] The present application provides a method, apparatus, sensing device and storage medium for identifying a perception target.

[0008] According to one aspect of the present application, a method for identifying a perception target is provided, which is applied to a perception device. The method comprises: sending a perception reference signal to a synaesthesia environment; wherein the comb factor of the perception reference signal is greater than a set value, and the OFDM symbol in the perception reference signal includes a first number N S The time domain sampling point, the cyclic prefix in the perception reference signal includes a second number N CPtime domain sampling points; detecting the synaesthesia environment to obtain a perception echo signal, wherein the perception echo signal is a signal reflected by the perception reference signal through the perception target in the synaesthesia environment; performing radio frequency preprocessing on the perception echo signal to obtain a first baseband signal, and deleting the frontmost part of the first baseband signal and the last N CP time domain sampling points to obtain a second baseband signal; and based on the second baseband signal, identify the distance between the perception target and the perception device in the synaesthesia environment.

[0009] As a possible implementation method, the perception reference signal is generated by the following steps: obtaining a comb factor configured for the perception reference signal; wherein the comb factor is greater than a set value; generating a frequency domain reference sequence according to the spectrum range used by the perception device, and mapping the frequency domain reference sequence to a frequency domain reference signal according to the comb factor; generating a time domain baseband signal according to the frequency domain reference signal, and adding a cyclic prefix to the time domain baseband signal; wherein the OFDM symbol in the time domain baseband signal includes N S time domain samples, the cyclic prefix contains N CP time domain sample points; and up-mixing the time domain baseband signal after adding the cyclic prefix to obtain a perception reference signal.

[0010] As a possible implementation method, a time domain baseband signal is generated based on a frequency domain reference signal, including: increasing the power of the frequency domain reference signal according to a comb factor to obtain an adjusted frequency domain reference signal; performing IFFT transformation on the adjusted frequency domain reference signal to obtain a time domain baseband signal.

[0011] As a possible implementation method, based on the second baseband signal, the distance between the perception target and the perception device in the synaesthesia environment is identified, including: performing channel estimation on the second baseband signal to obtain a target channel estimation result; and identifying the distance between the perception target and the perception device according to the target channel estimation result.

[0012] As a possible implementation method, performing channel estimation on the second baseband signal to obtain a target channel estimation result includes: Determine the FFT length; perform FFT transformation on the second baseband signal according to the FFT length to obtain a frequency domain received signal; perform frequency domain channel estimation on the frequency domain received signal to obtain an intermediate channel estimation result; perform delay domain channel estimation on the intermediate channel estimation result to obtain a target channel estimation result.

[0013] As a possible implementation method, the perception reference signal is generated based on the frequency domain reference signal, which includes multiple frequency domain sampling points; frequency domain channel estimation is performed on the frequency domain received signal to obtain an intermediate channel estimation result, including: determining the target frequency domain sampling point carrying the reference signal from the multiple frequency domain sampling points in the frequency domain reference signal; performing frequency domain channel estimation on the frequency domain received signal based on the conjugate of the sampling value of the target frequency domain sampling point in the frequency domain reference signal to obtain an intermediate channel estimation result.

[0014] As a possible implementation method, delay domain channel estimation is performed on the intermediate channel estimation result to obtain a target channel estimation result, including: performing IFFT transformation on the intermediate channel estimation result based on the FFT length to obtain the target channel estimation result.

[0015] As a possible implementation method, the target channel estimation result includes multiple time domain sampling points; based on the target channel estimation result, the distance between the perception target and the perception device is identified, including: determining the target time domain sampling points belonging to the perception target from the multiple time domain sampling points of the target channel estimation result; determining the delay of the perception target based on the arrangement position of the target time domain sampling points in the target channel estimation result; and determining the distance between the perception target and the perception device based on the delay of the perception target.

[0016] As a possible implementation method, the target delay is determined according to the ranking of the target time domain sample points in the target channel estimation result, including: obtaining the subcarrier spacing SCS between multiple subcarriers in the bandwidth occupied by the perception reference signal; according to SCS and N S , determine the intermediate frequency sampling interval; determine the delay of sensing the target based on the product of the intermediate frequency sampling interval and the arrangement position.

[0017] As a possible implementation method, the distance between the perception target and the perception device is determined according to the time delay of the perception target, including: determining the distance between the perception target and the perception device according to the product of the speed of light and the time delay.

[0018] According to another aspect of the present application, a sensing device is provided, comprising a memory, a transceiver, and a processor;

[0019] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of a processor; a processor for reading the computer program in the memory and performing the following operations: sending a perception reference signal to the synaesthesia environment; wherein the comb factor of the perception reference signal is greater than a set value, and the OFDM symbol in the perception reference signal includes a first number N S The time domain sampling point, the cyclic prefix in the perception reference signal includes a second number N CPtime domain sampling points; detecting the synaesthesia environment to obtain a perception echo signal, wherein the perception echo signal is a signal reflected by the perception reference signal through the perception target in the synaesthesia environment; performing radio frequency preprocessing on the perception echo signal to obtain a first baseband signal, and deleting the frontmost part of the first baseband signal and the last N CP time domain sampling points to obtain a second baseband signal; and based on the second baseband signal, identify the distance between the perception target and the perception device in the synaesthesia environment.

[0020] As a possible implementation, the processor performs the following steps to generate a perception reference signal: obtaining a comb factor configured for the perception reference signal; wherein the comb factor is greater than a set value; generating a frequency domain reference sequence according to the spectrum range used by the perception device, and mapping the frequency domain reference sequence to a frequency domain reference signal according to the comb factor; generating a time domain baseband signal according to the frequency domain reference signal, and adding a cyclic prefix to the time domain baseband signal; wherein the OFDM symbol in the time domain baseband signal includes N S time domain samples, the cyclic prefix contains N CP time domain sample points; and up-mixing the time domain baseband signal after adding the cyclic prefix to obtain a perception reference signal.

[0021] As a possible implementation method, the processor generates a time domain baseband signal based on the frequency domain reference signal, specifically: according to the comb factor, the power of the frequency domain reference signal is increased to obtain an adjusted frequency domain reference signal; and the adjusted frequency domain reference signal is subjected to IFFT transformation to obtain a time domain baseband signal.

[0022] As a possible implementation method, the processor executes based on the second baseband signal to identify the distance between the perception target and the perception device in the synaesthesia environment, specifically: performing channel estimation on the second baseband signal to obtain a target channel estimation result; and identifying the distance between the perception target and the perception device based on the target channel estimation result.

[0023] As a possible implementation, the processor performs channel estimation on the second baseband signal to obtain a target channel estimation result, specifically: according to Determine the FFT length; perform FFT transformation on the second baseband signal according to the FFT length to obtain a frequency domain received signal; perform frequency domain channel estimation on the frequency domain received signal to obtain an intermediate channel estimation result; perform delay domain channel estimation on the intermediate channel estimation result to obtain a target channel estimation result.

[0024] As a possible implementation method, the perception reference signal is generated based on the frequency domain reference signal, which includes multiple frequency domain sampling points; the processor performs frequency domain channel estimation on the frequency domain received signal to obtain an intermediate channel estimation result, specifically: determining the target frequency domain sampling point carrying the reference signal from the multiple frequency domain sampling points in the frequency domain reference signal; performing frequency domain channel estimation on the frequency domain received signal based on the conjugate of the sampling value of the target frequency domain sampling point in the frequency domain reference signal to obtain an intermediate channel estimation result.

[0025] As a possible implementation method, the processor performs delay domain channel estimation on the intermediate channel estimation result to obtain the target channel estimation result, specifically: based on the FFT length, the intermediate channel estimation result is subjected to IFFT transformation to obtain the target channel estimation result.

[0026] As a possible implementation method, the target channel estimation result includes multiple time domain sampling points; the processor executes to identify the distance between the perception target and the perception device based on the target channel estimation result, specifically: determining the target time domain sampling point belonging to the perception target from the multiple time domain sampling points of the target channel estimation result; determining the delay of the perception target based on the arrangement position of the target time domain sampling point in the target channel estimation result; and determining the distance between the perception target and the perception device based on the delay of the perception target.

[0027] As a possible implementation method, the processor determines the time delay of the sensing target according to the ranking of the target time domain sample points in the target channel estimation result, specifically: obtaining the subcarrier spacing SCS between multiple subcarriers within the bandwidth occupied by the sensing reference signal; according to SCS and N S , determine the intermediate frequency sampling interval; determine the delay of sensing the target based on the product of the intermediate frequency sampling interval and the arrangement position.

[0028] As a possible implementation method, the processor determines the distance between the perception target and the perception device based on the delay of the perception target, specifically: determining the distance between the perception target and the perception device based on the product of the speed of light and the delay.

[0029] According to another aspect of the present application, a device for identifying a perception target is provided, which is applied to a perception device. The device includes: a sending unit for sending a perception reference signal to a synaesthesia environment; wherein the comb factor of the perception reference signal is greater than a set value, and the OFDM symbol in the perception reference signal includes a first number N S The time domain sampling point, the cyclic prefix in the perception reference signal includes a second number N CPThe detection unit is used to detect the synaesthesia environment and obtain a perception echo signal, wherein the perception echo signal is a signal reflected by the perception reference signal through the perception target in the synaesthesia environment; the processing unit is used to perform radio frequency preprocessing on the perception echo signal to obtain a first baseband signal, and delete the frontmost part of the first baseband signal. and the last N CP time domain sampling points to obtain a second baseband signal; and an identification unit is used to identify the distance between the perception target and the perception device in the synaesthesia environment based on the second baseband signal.

[0030] As a possible implementation, the perception reference signal is generated using the following units:

[0031] An acquisition unit, configured to acquire a comb factor configured for the perception reference signal; wherein the comb factor is greater than a set value;

[0032] A first generating unit is configured to generate a frequency domain reference sequence according to a frequency spectrum range used by the sensing device, and map the frequency domain reference sequence into a frequency domain reference signal according to a comb factor;

[0033] The second generating unit is configured to generate a time domain baseband signal according to the frequency domain reference signal and add a cyclic prefix to the time domain baseband signal; wherein the OFDM symbol in the time domain baseband signal includes N S time domain samples, the cyclic prefix contains N CP time domain samples;

[0034] The mixing unit is used to up-mix the time domain baseband signal after adding the cyclic prefix to obtain a perception reference signal.

[0035] As a possible implementation method, the second generation unit is specifically used to: increase the power of the frequency domain reference signal according to the comb factor to obtain an adjusted frequency domain reference signal; perform IFFT transformation on the adjusted frequency domain reference signal to obtain a time domain baseband signal.

[0036] As a possible implementation manner, the identification unit is specifically used to: perform channel estimation on the second baseband signal to obtain a target channel estimation result; and identify the distance between the sensing target and the sensing device based on the target channel estimation result.

[0037] As a possible implementation method, the identification unit is specifically used to: Determine the FFT length; perform FFT transformation on the second baseband signal according to the FFT length to obtain a frequency domain received signal; perform frequency domain channel estimation on the frequency domain received signal to obtain an intermediate channel estimation result; perform delay domain channel estimation on the intermediate channel estimation result to obtain a target channel estimation result.

[0038] As a possible implementation method, the perception reference signal is generated based on the frequency domain reference signal, which includes multiple frequency domain samples; the identification unit is specifically used to: determine the target frequency domain sample carrying the reference signal from the multiple frequency domain samples in the frequency domain reference signal; perform frequency domain channel estimation on the frequency domain received signal based on the conjugate of the sampling value of the target frequency domain sample in the frequency domain reference signal to obtain an intermediate channel estimation result.

[0039] As a possible implementation manner, the identification unit is specifically configured to: perform IFFT transformation on the intermediate channel estimation result based on the FFT length to obtain the target channel estimation result.

[0040] As a possible implementation method, the target channel estimation result includes multiple time domain sampling points; the identification unit is specifically used to: determine the target time domain sampling point belonging to the perception target from the multiple time domain sampling points of the target channel estimation result; determine the delay of the perception target based on the arrangement position of the target time domain sampling point in the target channel estimation result; determine the distance between the perception target and the perception device based on the delay of the perception target.

[0041] As a possible implementation, the identification unit is specifically configured to: obtain a subcarrier spacing SCS between multiple subcarriers within the bandwidth occupied by the perception reference signal; and S , determine the intermediate frequency sampling interval; determine the delay of sensing the target based on the product of the intermediate frequency sampling interval and the arrangement position.

[0042] As a possible implementation manner, the recognition unit is specifically used to determine the distance between the perception target and the perception device based on the product of the speed of light and the time delay.

[0043] According to another aspect of the present application, a processor-readable storage medium is provided, wherein the processor-readable storage medium stores a computer program, and the computer program is used to enable a processor to execute any of the aforementioned methods for identifying a perception target.

[0044] According to another aspect of the present application, a computer program product is provided. When instructions in the computer program product are executed by a processor, any of the aforementioned methods for identifying a perception target is performed.

[0045] The present application has the following technical effects: without changing the traditional OFDM configuration mode and the transmission form of the perception reference signal, the perception ranging range is effectively extended by configuring the comb factor of the perception reference signal to be greater than a set value (for example, the comb factor may be 2). For example, taking the SCS between multiple subcarriers within the bandwidth occupied by the perception reference signal as 30 kHz, when the comb factor of the perception reference signal is 2, the equivalent subcarrier spacing is 60 kHz, and the equivalent CP length is extended to: + the time length of the original cyclic prefix in the perception reference signal. For example, when the SCS is 30 kHz, the time length of the original cyclic prefix in the perception reference signal is 2.34 us. At this time, the equivalent CP length is extended to: 16.67 us + 2.34 us = 19.01 us, and the perception ranging range is extended from the original 350 meters to 2.5 kilometers. This not only increases the perception ranging range, but also ensures that the time and frequency resources of the original system are not wasted.

[0046] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The accompanying drawings are provided to facilitate a better understanding of the present invention and do not constitute a limitation of the present application.

[0048] Figure 1 is a schematic diagram of the sensing ranging range of the traditional CP length;

[0049] FIG2 is a flow chart of a method for identifying a perceived target provided in an embodiment of the present application;

[0050] FIG3 is a flow chart of another method for identifying a perceived target provided in an embodiment of the present application;

[0051] FIG4 is a flow chart of another method for identifying a perceived target provided in an embodiment of the present application;

[0052] FIG5 is a flow chart of another method for identifying a perceived target provided in an embodiment of the present application;

[0053] FIG6 is a schematic diagram of a sensing ranging range of a half symbol based on a comb factor configuration according to an embodiment of the present application;

[0054] FIG7 is a schematic diagram illustrating the implementation principle of the extended sensing ranging range based on half-symbol sensing provided in an embodiment of the present application;

[0055] FIG8 is a schematic diagram of equivalent CP extension provided in an embodiment of the present application;

[0056] FIG9 is a schematic diagram of de-equivalently extending CP and CS provided in an embodiment of the present application;

[0057] FIG10 is a schematic structural diagram of a sensing device provided according to an embodiment of the present application;

[0058] FIG11 is a schematic structural diagram of a target perception recognition device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0059] In the embodiments of this application, the term "and / or" describes the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0060] In the embodiments of the present application, the term "plurality" refers to two or more than two, and other quantifiers are similar.

[0061] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0062] In the inter-sensory ranging application based on the communication OFDM signal waveform, the ranging range of the perceived target is limited by the CP length of the OFDM symbol. To expand the ranging range of the perceived target, a simple idea is to directly extend the CP length of the original OFDM symbol. However, this method usually results in a waste of resources.

[0063] As an example, under a common 30 kHz (kilohertz) subcarrier spacing configuration, the duration of an OFDM symbol is 33.33 microseconds, the typical CP length is 2.34 microseconds, and the ranging range of the perceived target can be shown in FIG1 .

[0064] Among them, T in Figure 1 CP is the CP length, T SYM is the duration of the OFDM symbol, t TX is the timing duration of the sensing sender, S RX It is the perception distance of the receiving end (or called ranging distance).

[0065] As shown in Figure 1, when transmitting and receiving are synchronized, the range of the sensing target is approximately 350 meters. For sensing targets beyond 350 meters, the echo signal cannot obtain a complete OFDM signal within the receiving detection window. This echo signal will generate symbol crosstalk between subcarriers, making it impossible to perform channel measurement properly, ultimately affecting the sensing target's distance measurement. The shaded area between 350 and 5350 meters in Figure 1 represents the detection window, meaning that the sensing receiver can periodically detect (or sense) the OFDM signal within the detection window.

[0066] In the related art, there is no unified method for extending the perceptual ranging range of perceptual or synaesthesia targets. A simple approach is to directly extend the CP length of the original OFDM symbol. For example, by reducing the original 14 OFDM symbols in a time slot to 12 OFDM symbols, the CP length can be extended to approximately 8.33 microseconds, and the ranging range can be extended to 1.25 kilometers.

[0067] However, this method sacrifices the time domain resources of 2 OFDM symbols, resulting in resource waste.

[0068] In response to at least one of the above-mentioned problems, the present application provides a method, apparatus, sensing device and storage medium for identifying a perception target.

[0069] The following describes the method, apparatus, sensing device, and storage medium for identifying a sensing target according to the present embodiment with reference to the accompanying drawings. Before describing the embodiments of the present application in detail, for ease of understanding, the following common technical terms are first introduced:

[0070] The synaesthesia environment refers to the perception environment, that is, the set of all scatterers that the perception reference signal encounters on the way from the perception sending end to the perception receiving end. For example, taking the identification of perception targets under smart transportation as an example, the synaesthesia environment can include the set of all objects in road traffic that may affect the perception reference signal, such as vehicles, pedestrians, road infrastructure, obstacles, animals, etc.

[0071] This application uses the example of a perception receiving end and a perception sending end being located in the same communication device (referred to as a perception device in this application) for illustration.

[0072] It should be noted that the method for identifying a perception target provided in this application can be applied to a synaesthesia channel or a communication channel, and can also be applied to a synaesthesia environment. This application only uses the method applied to a synaesthesia environment as an example.

[0073] The comb factor is a parameter used to control the transmission and reception of signals to optimize the quality and efficiency of signal transmission. The comb factor can be adjusted according to different system requirements and application scenarios to achieve the best signal transmission effect.

[0074] A time domain sample point, or time domain sampling point, refers to a sampling point obtained by sampling a time domain signal.

[0075] Frequency domain samples, or frequency domain sampling points, are sampling points obtained by sampling a frequency domain signal. The number of frequency domain samples is less than or equal to the FFT (Fast Fourier Transform) length, and each frequency domain sample corresponds to a subcarrier.

[0076] Perception targets: In different application scenarios, the perception targets can be different. For example, in smart transportation scenarios, the perception targets can be vehicles, pedestrians, animals (such as pets), objects (such as roadblocks, garbage, etc.), etc. In smart factory scenarios, the perception targets can be movable robots / robotic arms, products, other equipment, etc.

[0077] Perception devices: In different application scenarios, the perception devices may be different. For example, in a smart transportation scenario, the perception devices may be access network devices, roadside units, vehicles, etc. In a smart factory scenario, the perception devices may be fixed devices, movable devices, etc. in the smart factory. The embodiments of this application do not limit this.

[0078] Here, the access network device is used as an example, using a base station. A base station can include multiple cells that provide services to terminals. Depending on the specific application scenario, a base station can also be called an access point, or it can be a device in the access network that communicates with wireless terminals over the air interface through one or more sectors, or other names. The access network device can be used to convert received air frames into Internet Protocol (IP) packets, and act as a router between the wireless terminal and the rest of the access network, which may include an Internet Protocol (IP) communication network. The access network device can also coordinate the attribute management of the air interface. For example, the access network device involved in the embodiments of the present application can be an access network device (Base Transceiver Station, BTS) in the Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA), or an access network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or an evolutionary access network device (eNB or e-NodeB) in the long term evolution (LTE) system, a 5G base station (gNB) in the 5G network architecture (next generation system), or a home evolved Node B (HeNB), a relay node, a femto, a pico, etc., which is not limited in the embodiments of the present application. In some network structures, the access network device may include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit may also be geographically separated.

[0079] The term "terminal" may refer to a device that provides voice and / or data connectivity to a user, a handheld device with wireless connection capabilities, or other processing devices connected to a wireless modem. The names of terminals may vary in different systems. For example, in a 5G system, a terminal may be referred to as User Equipment (UE). A wireless terminal may communicate with one or more core networks (CNs) via a radio access network (RAN). A wireless terminal may be a mobile terminal, such as a mobile phone (or "cellular" phone) or a computer with a mobile terminal. For example, a mobile device may be portable, pocket-sized, handheld, built-in, or vehicle-mounted, which exchanges voice and / or data with a radio access network. Examples include personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, and personal digital assistants (PDAs). A wireless terminal may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, a remote terminal, an access terminal, a user terminal, a user agent, or a user device, but is not limited thereto in the embodiments of the present application.

[0080] FIG2 is a flow chart of a method for identifying a perception target provided in an embodiment of the present application.

[0081] The method for identifying a perception target according to the embodiment of the present application can be applied to a perception device.

[0082] As shown in FIG2 , the method for identifying a perceived target may include the following steps:

[0083] Step S201: sending a perception reference signal to the synaesthesia environment; wherein the comb factor of the perception reference signal is greater than a set value, and the OFDM symbol in the perception reference signal includes a first number N S The time domain sampling point, the cyclic prefix in the perception reference signal includes a second number NCP time domain samples.

[0084] The set value is a preset value, for example, the set value may be 1.

[0085] Among them, the comb factor of the perception reference signal is greater than the set value, which means that there are multiple identical perception reference signals in the frequency domain. This configuration can increase the power of the perception reference signal on each RE (Resource Element), thereby achieving a proportional increase in signal strength. In addition, when the comb factor of the perception reference signal is greater than the set value, more antennas can send perception reference signals at the same time. These signals form a comb structure in the frequency domain, and each frequency domain sample point (referred to as a frequency point for short) carries multiple identical reference signals. Since these reference signals are the same, they can be added together at the perception receiving end to enhance the signal strength. In this way, the power of the perception reference signal can be increased proportionally, thereby improving the signal-to-noise ratio of the signal.

[0086] In this embodiment of the present application, the perception reference signal may include a first duration T S OFDM symbol and the second duration T CP cyclic prefix, wherein the OFDM symbol may include a first number N S The cyclic prefix may include a second number N CP time domain samples.

[0087] As an example, the SCS (Sub-carrier Spacing) between multiple sub-carriers within the bandwidth occupied by the perception reference signal is 30KHz. S Can be T CP It can be 2.34us, N S It can be 4096.

[0088] In an embodiment of the present application, the perception device may send a perception reference signal to the synaesthesia environment.

[0089] Step S202 : detecting the synaesthesia environment to obtain a perception echo signal, wherein the perception echo signal is a signal reflected by a perception reference signal via a perception target in the synaesthesia environment.

[0090] In an embodiment of the present application, the sensing device may further detect (or sense) the synaesthesia environment to obtain a sensing echo signal, wherein the sensing echo signal is a signal reflected or returned by a sensing reference signal from a sensing target in the synaesthesia environment. For example, the sensing device may periodically detect signals within a detection window to obtain the sensing echo signal.

[0091] Step S203: Perform radio frequency preprocessing on the sensed echo signal to obtain a first baseband signal, and delete the first N S / 2 and the last N CP time domain sample points to obtain a second baseband signal.

[0092] The radio frequency preprocessing includes but is not limited to frequency reduction processing.

[0093] In the embodiment of the present application, the sensing device can perform radio frequency preprocessing on the sensing echo signal to obtain a baseband signal, which is recorded as the first baseband signal in this application. After that, the sensing device can delete the frontmost baseband signal in the first baseband signal. time domain samples, and delete the last N in the first baseband signal CP time domain sample points to obtain a second baseband signal.

[0094] Step S204: Identify the distance between the perception target and the perception device in the synaesthesia environment based on the second baseband signal.

[0095] In an embodiment of the present application, the perception device may identify the distance between the perception target in the synaesthesia environment and the perception device based on the second baseband signal.

[0096] The method for identifying a sensing target in an embodiment of the present application can effectively expand the sensing ranging range by configuring the comb factor of the sensing reference signal to be greater than a set value (exemplarily, the comb factor may be 2) without changing the traditional OFDM configuration mode and the sensing reference signal transmission form. For example, taking the SCS between multiple subcarriers within the bandwidth occupied by the sensing reference signal as 30 kHz as an example, when the comb factor of the sensing reference signal is 2, the equivalent subcarrier spacing is 60 kHz, and the equivalent CP length is extended to: + the time length of the original cyclic prefix in the perception reference signal. For example, when the SCS is 30 kHz, the time length of the original cyclic prefix in the perception reference signal is 2.34 us. At this time, the equivalent CP length is extended to: 16.67 us + 2.34 us = 19.01 us, and the perception ranging range is extended from the original 350 meters to 2.5 kilometers. This not only increases the perception ranging range, but also ensures that the time and frequency resources of the original system are not wasted.

[0097] In order to clearly explain how the perception reference signal is generated in the above embodiments of the present application, the present application also proposes a method for identifying a perception target.

[0098] FIG3 is a flow chart of another method for identifying a perception target provided in an embodiment of the present application.

[0099] As shown in FIG3 , the method for identifying a perceived target may include the following steps:

[0100] Step S301: Obtain a comb factor configured for a perception reference signal; wherein the comb factor is greater than a set value.

[0101] In an embodiment of the present application, a comb factor pre-configured or set for a perception reference signal may be obtained; wherein the comb factor is greater than a set value.

[0102] For example, label the comb factor K TC , then K is required TC Greater than the set value, the typical requirement is: K TC =2.

[0103] Step S302: Generate a frequency domain reference sequence according to the frequency spectrum range used by the sensing device, and map the frequency domain reference sequence into a frequency domain reference signal according to the comb factor.

[0104] The spectrum range, also known as system bandwidth, is used to define the frequency range of signal transmission and also determines the signal transmission rate and system capacity.

[0105] In an embodiment of the present application, the sensing device may generate a frequency domain reference sequence according to a frequency spectrum range used by the sensing device. For example, the frequency domain reference sequence may be a ZC sequence (Zadoff-Chu sequence).

[0106] In an embodiment of the present application, the sensing device may also map the frequency domain reference sequence into a frequency domain reference signal according to the comb factor configuration.

[0107] Step S303: Generate a time domain baseband signal according to the frequency domain reference signal, and add a cyclic prefix to the time domain baseband signal.

[0108] In the embodiment of the present application, the sensing device can generate a time domain baseband signal according to the frequency domain reference signal, wherein the time domain baseband signal includes an OFDM symbol, and the OFDM symbol includes N S time domain samples.

[0109] As an example, a method for generating a time domain baseband signal may be:

[0110] 1. The sensing device can increase the power of the frequency domain reference signal according to the comb factor to obtain an adjusted frequency domain reference signal.

[0111] For example, the frequency domain reference signal is marked as S(n), where n is the number of frequency domain samples or the sequence number of the frequency domain samples in the frequency domain reference signal, and the adjusted frequency domain reference signal is marked as The following formula can be used to adjust S(n) to obtain

[0112] 2. Perform IFFT (Inverse Fast Fourier Transform) on the adjusted frequency domain reference signal to obtain a time domain baseband signal.

[0113] For example, if the time domain baseband signal is labeled s(t), then:

[0114] In the embodiment of the present application, the sensing device can also add a cyclic prefix CP to the time domain baseband signal, wherein the cyclic prefix contains N CP time domain samples.

[0115] Step S304 : up-mixing the time domain baseband signal after adding the cyclic prefix to obtain a perception reference signal.

[0116] In an embodiment of the present application, the sensing device may up-mix the time domain baseband signal after adding the cyclic prefix to obtain the sensing reference signal. For example, the sensing device may up-convert the time domain baseband signal after adding the cyclic prefix to obtain the sensing reference signal.

[0117] Step S305: Send a perception reference signal to the synaesthesia environment.

[0118] Step S306: Detect the synaesthesia environment to obtain a perception echo signal.

[0119] The perception echo signal is a signal reflected by the perception reference signal through the perception target in the synaesthesia environment.

[0120] Step S307: Perform radio frequency preprocessing on the sensed echo signal to obtain a first baseband signal, and delete the first N S / 2 and the last N CP time domain sample points to obtain a second baseband signal.

[0121] Step S308: Identify the distance between the perception target and the perception device in the synaesthesia environment based on the second baseband signal.

[0122] The explanation of steps S305 to S308 can be found in the relevant description in any embodiment of the present application and will not be repeated here.

[0123] In the perception target identification method of the embodiment of the present application, the comb factor of the perception reference signal is configured to be greater than a set value. On this basis, the perception reference signal can be regarded as half an OFDM symbol (referred to as a half symbol) with an equivalent CP extended. In this case, the equivalent CP length has exceeded the equivalent signal length. For example, taking the SCS between multiple subcarriers within the bandwidth occupied by the perception reference signal as 30 kHz, the equivalent CP length is 19.01 us, and the equivalent signal length is 16.67 us. The perception ranging range is no longer limited by the CP length, and thus the perception ranging range can be extended to the distance interval covered by the entire half symbol.

[0124] In order to clearly illustrate how the distance between the perception target and the perception device in the synaesthesia environment is identified based on the second baseband signal in the above embodiments of the present application, the present application also proposes a method for identifying the perception target.

[0125] FIG4 is a flow chart of another method for identifying a perception target provided in an embodiment of the present application.

[0126] As shown in FIG4 , the method for identifying a perceived target may include the following steps:

[0127] Step S401: Send a perception reference signal to the synaesthesia environment.

[0128] The comb factor of the perceptual reference signal is greater than the set value, and the OFDM symbol in the perceptual reference signal includes a first number N S The time domain sampling point, the cyclic prefix in the perception reference signal includes a second number N CP time domain samples.

[0129] Step S402: Detect the synaesthesia environment to obtain a perception echo signal.

[0130] The perception echo signal is a signal reflected by the perception reference signal through the perception target in the synaesthesia environment.

[0131] Step S403: Perform radio frequency preprocessing on the sensed echo signal to obtain a first baseband signal, and delete the first N S / 2 and the last N CP time domain sample points to obtain a second baseband signal.

[0132] The explanation of steps S401 to S403 can be found in the relevant description in any embodiment of the present application and will not be repeated here.

[0133] Step S404: perform channel estimation on the second baseband signal to obtain a target channel estimation result.

[0134] In an embodiment of the present application, the sensing device can perform channel estimation on the second baseband signal to obtain a channel estimation result, which is recorded as a target channel estimation result in this application.

[0135] Step S405: Identify the distance between the sensing target and the sensing device according to the target channel estimation result.

[0136] In the embodiment of the present application, the perception device may identify the distance between the perception target and the perception device in the synaesthesia environment according to the target channel estimation result.

[0137] In any embodiment of the present application, the distance between the sensing target and the sensing device may be calculated by, for example:

[0138] 1. Based on the signal processing algorithm in the related art, the target time domain sample points belonging to the perception target can be determined or identified from the multiple time domain sample points of the target channel estimation result.

[0139] 2. The time delay of the perceived target can be determined based on the ranking (or sequence number) of the target time domain sample points in the target channel estimation result.

[0140] The ranking of the multiple time domain sample points can be determined based on the echo delays or reception times of the multiple time domain sample points. The shorter the echo delay of a time domain sample point, the earlier the reception time of the time domain sample point. For example, the multiple time domain sample points can be sorted from smallest to largest according to the echo delay, that is, the multiple time domain sample points can be sorted from earliest to latest according to the reception time, to obtain the ranking of each time domain sample point.

[0141] The time delay of sensing the target is positively correlated with the ranking (or sequence number) of the target time domain sample points.

[0142] As an example, the method for determining the delay of the perception target can be, for example: first, the SCS between multiple subcarriers in the bandwidth occupied by the perception reference signal can be obtained, and then the SCS and N can be used to determine the delay of the perception target. S , determine the intermediate frequency sampling interval, for example, the intermediate frequency sampling interval can be: Finally, the time delay of sensing the target can be determined based on the product of the intermediate frequency sampling interval and the ranking of the target time domain samples.

[0143] For example, the ranking (or serial number) of the target time domain sample in the target channel estimation result is k, and the corresponding delay of the perceived target is τ k , then: τ k =k*T sa ;(3)

[0144] Among them, T sa Indicates the intermediate frequency sampling interval, T saAccording to SCS and N S Determined, take the subcarrier spacing SCS as 30KHz as an example, N S It can be 4096, then:

[0145] Among them, ns refers to nanoseconds and us refers to microseconds.

[0146] 3. Determine the distance between the sensing target and the sensing device based on the time delay of the sensing target.

[0147] Among them, the distance between the perception target and the perception device is positively correlated with the latency of the perception target.

[0148] For example, the distance between the target and the sensing device is Range, which can be calculated using the following formula: Range = c*τ k ;(4)

[0149] Here, c represents the speed of light.

[0150] The method for identifying the perception target of the embodiment of the present application can effectively calculate the distance between the perception target and the perception device based on channel estimation, thereby improving the effectiveness of perception target identification.

[0151] In order to clearly illustrate how the channel estimation of the second baseband signal is performed to obtain the target channel estimation result in the above embodiment of the present application, the present application also proposes a method for identifying a perception target.

[0152] FIG5 is a flow chart of another method for identifying a perception target provided in an embodiment of the present application.

[0153] As shown in FIG5 , the method for identifying a perceived target may include the following steps:

[0154] Step S501: Send a perception reference signal to the synaesthesia environment.

[0155] The comb factor of the perceptual reference signal is greater than the set value, and the OFDM symbol in the perceptual reference signal includes a first number N S The time domain sampling point, the cyclic prefix in the perception reference signal includes a second number N CP time domain samples.

[0156] Step S502: Detect the synaesthesia environment to obtain a perception echo signal.

[0157] The perception echo signal is a signal reflected by the perception reference signal through the perception target in the synaesthesia environment.

[0158] Step S503: Perform radio frequency preprocessing on the sensed echo signal to obtain a first baseband signal, and delete the first N S / 2 and the last N CP time domain sample points to obtain a second baseband signal.

[0159] For explanations of steps S501 to S503 , please refer to the relevant descriptions in any embodiment of the present application and will not be repeated here.

[0160] Step S504: According to N S / 2, determines the FFT length.

[0161] Among them, the FFT length provided in this application is There is a positive correlation.

[0162] As an example, the FFT length (or FFT point number) provided in this application is marked as but Among them, N FFT is the FFT length in conventional Fourier transform, N FFT =N S .

[0163] Step S505: Perform FFT transformation on the second baseband signal according to the FFT length to obtain a frequency domain received signal.

[0164] In an embodiment of the present application, the sensing device may perform an FFT transform on the second baseband signal according to the FFT length to obtain a frequency domain received signal.

[0165] For example, label the second baseband signal as r(t) and label the frequency domain received signal as R(n), then:

[0166] Step S506: Perform frequency domain channel estimation on the frequency domain received signal to obtain an intermediate channel estimation result.

[0167] In an embodiment of the present application, the sensing device can perform frequency domain channel estimation on the frequency domain received signal to obtain an intermediate channel estimation result.

[0168] In any embodiment of the present application, the perception reference signal is generated based on the frequency domain reference signal S(n), where the frequency domain reference signal includes multiple frequency domain samples. In this case, the intermediate channel estimation result may be obtained, for example, by:

[0169] 1. Determine a target frequency domain sample point carrying a reference signal from multiple frequency domain sample points in the frequency domain reference signal.

[0170] Since not all frequency domain samples carry reference signals, in the present application, a target frequency domain sample carrying a reference signal may be determined from multiple frequency domain samples in the frequency domain reference signal.

[0171] 2. Perform frequency domain channel estimation on the frequency domain received signal based on the conjugate of the sampling value of the target frequency domain sample point in the frequency domain reference signal to obtain an intermediate channel estimation result.

[0172] As an example, the intermediate channel estimation result is marked as CH(n), and CH(n) can be calculated using the following formula: CH(n) = R(n).*conj(S(n')); (6)

[0173] Wherein, * refers to bitwise multiplication, conj represents taking the complex conjugate, n' represents the sequence number of the frequency domain sample point (denoted as the target frequency domain sample point in this application) configured with or carrying the reference signal in the comb-shaped frequency domain reference signal, and S(n') represents the sampling value of the target frequency domain sample point.

[0174] Step S507: performing delay domain channel estimation on the intermediate channel estimation result to obtain a target channel estimation result.

[0175] In an embodiment of the present application, the sensing device may perform delay domain channel estimation on the intermediate channel estimation result to obtain a target channel estimation result.

[0176] As an example, the sensing device can perform IFFT transformation on the intermediate channel estimation result based on the FFT length to obtain the target channel estimation result. For example, if the target channel estimation result is marked as ch(t), then:

[0177] Step S508: Identify the distance between the sensing target and the sensing device according to the target channel estimation result.

[0178] For the explanation of step S508, please refer to the relevant description in any embodiment of the present application and will not be repeated here.

[0179] The method for identifying the perception target of the embodiment of the present application can effectively calculate the distance between the perception target and the perception device based on channel estimation, thereby improving the effectiveness of perception target identification.

[0180] In any embodiment of the present application, the present application proposes an equivalent CP extension method based on comb factor configuration, which performs half OFDM symbol (hereinafter referred to as half symbol) perception on the perceived echo signal, thereby increasing the perception ranging range without changing the existing OFDM configuration method. Therefore, the number of time domain resources of the OFDM symbol is not reduced, effectively ensuring that the communication time and frequency resources are not wasted.

[0181] Specifically, this application proposes an equivalent CP extension method based on comb factor configuration. While extending the CP length and increasing the perceived ranging range, it does not change the existing OFDM configuration or reduce the number of OFDM symbol time-domain resources, effectively ensuring communication time-frequency resources. Furthermore, while the configuration of the comb factor increases the spacing between subcarriers, since the OFDM symbol bandwidth remains unchanged, it does not change the perceived resolution of distance.

[0182] Taking the subcarrier spacing as 30KHz as an example, when the comb factor = 2, the equivalent subcarrier spacing is 60KHz. At this time, as long as the echo is detected Data of microseconds (2048 time domain samples) can be orthogonally demodulated, and the equivalent CP length is extended to 19.01 microseconds (16.67 microseconds cyclic prefix + 2.34 microseconds cyclic suffix). At this time, the perception distance is mainly limited by the perception echo time length of 16.67us, so the perception ranging range is extended to 2.5 kilometers, as shown in Figure 6.

[0183] The shaded area between 1000m and 5350m in Figure 6 is the detection window, T CP is the CP length, T SYM is the duration of half an OFDM symbol, t TX is the timing duration of the sensing sender, S RX It is the perception distance of the perception receiving end (or called ranging distance). This application takes the perception sending end and the perception receiving end as an example, where the perception sending end and the perception receiving end are located in the same device (ie, the perception device).

[0184] The advantage of the above solution is that it does not change the existing OFDM signal perception and transmission process, and only requires processing the subcarrier spacing at 60KHz during detection and positioning.

[0185] It should be noted that although the window for detecting the echo signal in Figure 6 is shortened by half and the signal power is also reduced by half, due to the comb factor = 2, only half of the frequency domain samples have the perception reference signal sent. Therefore, the power of the frequency domain samples carrying the perception reference signal can be increased by 3dB (decibels), and the perception ranging range will not be reduced from an energy perspective.

[0186] When the comb factor is 4, the perceived echo time is 8.33 μs and the perceived ranging range is 1.25 km, which actually reduces the perceived ranging range. Therefore, the optimal comb factor configuration value is 2. In addition, if the system subcarrier spacing is directly configured to 60 kHz, the CP length will be shorter at this time, approximately 2.34 / 2 = 1.17 μs, and the perceived ranging range will be even smaller.

[0187] As an example, taking the subcarrier spacing of 30KHz as an example, the comb factor of the perception reference signal can be configured to be 2. On this basis, the perception reference signal is regarded as half an OFDM symbol (referred to as half a symbol) with an equivalent CP extension. At this time, the equivalent CP length (16.67us cyclic prefix + 2.34us cyclic suffix = 19.01us) has exceeded the equivalent signal length (16.67us), and the perception ranging range is no longer limited by the CP length, so that the perception ranging range can be extended to the distance interval covered by the entire half symbol. When performing perception echo signal processing, perception processing is performed on the half symbol. Among them, the implementation principle of the extended perception ranging range based on half-symbol perception can be shown in Figure 7, which mainly includes the following five parts:

[0188] Part 1: Transmission of perception reference signals based on comb factor configuration.

[0189] This part mainly completes the transmission of the perception reference signal. Similar to the traditional perception signal transmission method, its main features are: the comb factor K TC Need to be greater than the set value, for example, K TC The purpose is to create the conditions for equivalently extending the CP length. The characteristic is that the power of the sensing reference signal on each RE (Resource Element) is increased proportionally.

[0190] This part mainly includes the following steps:

[0191] 1.1. Setting the comb factor K of the perception reference signal TC , requiring K TC Greater than the set value, the typical requirement is: K TC =2;

[0192] 1.2. Based on the system bandwidth (i.e. the total spectrum range used by the sensing device, which defines the frequency range of signal transmission and also determines the signal transmission rate and system capacity), a frequency domain reference sequence (such as a ZC sequence) is generated and the frequency domain reference sequence is converted into a K TC Configuration, mapped to the frequency domain reference signal, denoted as S(n), where n is the number of frequency domain samples used;

[0193] 1.3 According to K TC Configuration, improve the power of the frequency domain reference signal, and increase the power of the frequency domain reference signal to the original K TC times, that is:

[0194] 1.4. Use IFFT algorithm to convert the frequency domain reference signal into the time domain reference signal, and get the time length of an OFDM symbol as T SThe time domain baseband signal s(t) is: And add a time length of T before the OFDM symbol CP Finally, the perception reference signal is obtained after up-mixing, and the perception reference signal is sent to the synaesthesia environment.

[0195] The second part is the reception of the sensing echo signal, that is, receiving the sensing echo signal returned by the sensing target.

[0196] The third part is the calculation of equivalent CP extension and CS (Cyclic Suffix) length. For example, in K TC Greater than the set value, for example, K TC When it is equal to 2, the equivalent extended CP length and CS length of the sensing reference signal are calculated, so that the extension of the sensing ranging range can be achieved.

[0197] Perform RF preprocessing on the sensed echo signal to obtain an OFDM symbol + CP length (T S +T CP ) baseband signal, assuming that the number of time domain samples on an OFDM symbol is N S , the number of time domain samples corresponding to CP is N CP , then the total number of time domain samples on the baseband signal is (N S +N CP ).

[0198] The traditional method is to set the header length of the above baseband signal to T CP The CP is removed and the channel estimation is performed on the remaining OFDM symbols to sense the distance of the target.

[0199] In this application, the equivalent CP length is extended to To expand the sensing range, the equivalent CP length is Right now: in, It refers to the time length of half a symbol.

[0200] As an example, the schematic diagram of equivalent CP extension can be shown in FIG8 (in FIG8, OFDM refers to the entire OFDM symbol, and OFDM' refers to a half symbol (i.e., half of an OFDM symbol)). In this case, the number of time domain samples of the equivalent extended CP is It should be noted that a CS is added at this time, and the CS length is T CS =T CP .

[0201] The fourth part is to de-equivalently extend the CP and CS to obtain a half symbol (i.e., half an OFDM symbol).

[0202] The received perception echo signal is subjected to a time-domain de-equivalently extended CP and CS operation. The CP to be removed in this process is different from the CP of the transmitted perception reference signal, so it is called de-equivalently extended CP, and a CS is added.

[0203] That is, the CP removal function module in the traditional method can be modified to remove the equivalent extended CP module. The specific method is to modify the length of (N S +N CP ) of the baseband signal time domain samples and the N CP time domain samples are deleted from the baseband signal, and the time length is The number of time domain samples is The echo time domain baseband signal (denoted as the second baseband signal in this application) is denoted as r(t).

[0204] As an example, a schematic diagram of de-equivalently extending CP and CS may be shown in FIG9 .

[0205] The fifth part is half-symbol channel estimation and distance calculation of the perceived target.

[0206] Channel estimation is performed on the remaining half symbols after de-equivalently extending the CP and CS, and the distance to the perceived target is calculated based on the delay domain channel estimation (channel impulse response).

[0207] Channel estimation is performed on r(t) after removing CP / CS. Since r(t) after removing CP has only half the time length of a symbol, this echo time domain baseband signal can be called a half-symbol echo. Therefore, the number of FFT points or FFT length in the traditional method (equal to the number of time domain samples of OFDM symbol, i.e. N) needs to be reduced. FFT =N S ) is reduced to half of its original value, i.e. This section mainly includes the following steps:

[0208] 5.1、Calculate the frequency domain received signal of half symbol, where the number of FFT points is Right now,

[0209] 5.3. Calculate the frequency-domain channel estimate for the half symbol: CH(n) = R(n).*conj(S(n')), where * represents bitwise multiplication, conj represents complex conjugation, and n' represents the number of the frequency-domain sample in the comb-shaped frequency-domain reference signal that is configured with or carries the reference signal.

[0210] 5.3. Calculate half-symbol delay domain channel estimation.

[0211] 5.4. Take the time domain sample point corresponding to the perception target in ch(t) and determine the arrangement position or sequence number k corresponding to the time domain sample point. The delay corresponding to the perception target is: τ k =k*T sa ;

[0212] Among them, T sa Indicates the intermediate frequency sampling interval, T sa According to SCS and N S Determined, take the subcarrier spacing SCS as 30KHz as an example, N S It can be 4096, then:

[0213] 5.5. Calculate the distance Range between the sensing target and the sensing device, that is, Range = c*τ k , where c represents the speed of light.

[0214] The value range of the frequency domain sample point number n and the sequence number k corresponding to the time domain sample point of the above half symbol is: The values ​​are all positive integers.

[0215] It should be noted that the above-mentioned distance calculation process is given with a subcarrier spacing of 30 kHz, and other similar subcarrier spacing configurations are also within the protection scope of this application.

[0216] In summary, compared with the prior art, the technical solution provided by this application has at least the following advantages: without changing the traditional OFDM perception reference signal transmission format, by configuring the comb factor to be greater than the set value (for example, the comb factor value can be 2), the perception ranging range is effectively expanded, and the time-frequency resources of the original system are ensured not to be wasted. Moreover, due to the configuration of the comb factor, the power of the frequency domain samples in the frequency domain reference signal is improved. At the same time, the configuration of the comb factor does not change the perception resolution of the distance.

[0217] The technical solution provided in the embodiment of the present application can be applicable to a variety of systems, especially 5G systems. For example, applicable systems may be Global System of Mobile communication (GSM) systems, Code Division Multiple Access (CDMA) systems, Wideband Code Division Multiple Access (WCDMA) systems, General Packet Radio Service (GPRS) systems, Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, Long Term Evolution Advanced (LTE-A) systems, Universal Mobile Telecommunication System (UMTS) systems, Worldwide interoperability for Microwave Access (WiMAX) systems, 5G New Radio (NR) systems, etc. These various systems include terminals and network equipment. The system may also include core network parts, such as the Evolved Packet System (EPS) and the 5G System (5GS).

[0218] In order to implement the above embodiments, the present application also provides a sensing device.

[0219] FIG10 is a schematic structural diagram of a sensing device provided according to an embodiment of the present application.

[0220] As shown in FIG10 , the sensing device may include a transceiver 1000, a processor 1010, and a memory 1020, wherein:

[0221] The transceiver 1000 is configured to receive and send data under the control of the processor 1010 .

[0222] In FIG10 , the bus architecture may include any number of interconnected buses and bridges, specifically linking together various circuits of one or more processors represented by processor 1010 and memory represented by memory 1020. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 1000 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices over a transmission medium, such as a wireless channel, a wired channel, an optical cable, or the like. The processor 1010 is responsible for managing the bus architecture and general processing, and the memory 1020 may store data used by the processor 1010 when performing operations.

[0223] The processor 1010 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or a complex programmable logic device (CPLD). The processor may also adopt a multi-core architecture.

[0224] The processor 1010 calls the computer program stored in the memory and performs the following operations: sending a perception reference signal to the synaesthesia environment; wherein the comb factor of the perception reference signal is greater than the set value, and the OFDM symbol in the perception reference signal includes a first number N S The time domain sampling point, the cyclic prefix in the perception reference signal includes a second number N CP time domain sampling points; detecting the synaesthesia environment to obtain a perception echo signal, wherein the perception echo signal is a signal reflected by the perception reference signal through the perception target in the synaesthesia environment; performing radio frequency preprocessing on the perception echo signal to obtain a first baseband signal, and deleting the frontmost part of the first baseband signal and the last N CP time domain sampling points to obtain a second baseband signal; and based on the second baseband signal, identify the distance between the perception target and the perception device in the synaesthesia environment.

[0225] As a possible implementation, the processor 1010 performs the following steps to generate a perception reference signal: obtaining a comb factor configured for the perception reference signal; wherein the comb factor is greater than a set value; generating a frequency domain reference sequence according to the spectrum range used by the perception device, and mapping the frequency domain reference sequence to a frequency domain reference signal according to the comb factor; generating a time domain baseband signal according to the frequency domain reference signal, and adding a cyclic prefix to the time domain baseband signal; wherein the OFDM symbol in the time domain baseband signal includes N S time domain samples, the cyclic prefix contains N CP time domain sample points; and up-mixing the time domain baseband signal after adding the cyclic prefix to obtain a perception reference signal.

[0226] As a possible implementation method, the processor 1010 generates a time domain baseband signal based on the frequency domain reference signal, specifically: according to the comb factor, the power of the frequency domain reference signal is increased to obtain an adjusted frequency domain reference signal; and the adjusted frequency domain reference signal is subjected to IFFT transformation to obtain a time domain baseband signal.

[0227] As a possible implementation method, the processor 1010 executes based on the second baseband signal to identify the distance between the perception target and the perception device in the synaesthesia environment, specifically: performing channel estimation on the second baseband signal to obtain a target channel estimation result; and identifying the distance between the perception target and the perception device based on the target channel estimation result.

[0228] As a possible implementation, the processor 1010 performs channel estimation on the second baseband signal to obtain a target channel estimation result, specifically: according to Determine the FFT length; perform FFT transformation on the second baseband signal according to the FFT length to obtain a frequency domain received signal; perform frequency domain channel estimation on the frequency domain received signal to obtain an intermediate channel estimation result; perform delay domain channel estimation on the intermediate channel estimation result to obtain a target channel estimation result.

[0229] As a possible implementation method, the perception reference signal is generated based on the frequency domain reference signal, which includes multiple frequency domain sampling points; the processor 1010 performs frequency domain channel estimation on the frequency domain received signal to obtain an intermediate channel estimation result, specifically: determining the target frequency domain sampling point carrying the reference signal from the multiple frequency domain sampling points in the frequency domain reference signal; performing frequency domain channel estimation on the frequency domain received signal based on the conjugate of the sampling value of the target frequency domain sampling point in the frequency domain reference signal to obtain an intermediate channel estimation result.

[0230] As a possible implementation method, the processor 1010 performs delay domain channel estimation on the intermediate channel estimation result to obtain a target channel estimation result, specifically: based on the FFT length, performing IFFT transformation on the intermediate channel estimation result to obtain a target channel estimation result.

[0231] As a possible implementation method, the target channel estimation result includes multiple time domain sampling points; the processor 1010 executes to identify the distance between the perception target and the perception device based on the target channel estimation result, specifically: determining the target time domain sampling point belonging to the perception target from the multiple time domain sampling points of the target channel estimation result; determining the delay of the perception target based on the arrangement position of the target time domain sampling point in the target channel estimation result; determining the distance between the perception target and the perception device based on the delay of the perception target.

[0232] As a possible implementation, the processor 1010 determines the target perception delay according to the ranking of the target time domain sample points in the target channel estimation result, specifically by: obtaining the subcarrier spacing SCS between multiple subcarriers within the bandwidth occupied by the perception reference signal; according to the SCS and N S , determine the intermediate frequency sampling interval; determine the delay of sensing the target based on the product of the intermediate frequency sampling interval and the arrangement position.

[0233] As a possible implementation method, the processor 1010 determines the distance between the perception target and the perception device based on the delay of the perception target, specifically: determining the distance between the perception target and the perception device based on the product of the speed of light and the delay.

[0234] It should be noted here that the sensing device provided in the embodiment of the present application can implement all the method steps implemented in the method embodiments of Figures 2 to 5 above, and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be described in detail here.

[0235] Corresponding to the perception target identification method provided in the embodiments of Figures 2 to 5 above, the present application also provides a perception target identification device. Since the perception target identification device provided in the embodiments of the present application corresponds to the perception target identification method provided in the embodiments of Figures 2 to 5 above, the implementation method of the perception target identification method is also applicable to the perception target identification device provided in the embodiments of the present application, and will not be described in detail in the embodiments of the present application.

[0236] In order to implement the above embodiment, the present application also proposes a recognition device for sensing targets.

[0237] FIG11 is a schematic structural diagram of a target perception recognition device provided in an embodiment of the present application.

[0238] As shown in FIG11 , the target recognition device 1100 can be applied to a sensing device, and includes: a sending unit 1110 , a detection unit 1120 , a processing unit 1130 and a recognition unit 1140 .

[0239] The sending unit 1110 is configured to send a perception reference signal to the synaesthesia environment; wherein the comb factor of the perception reference signal is greater than a set value, and the OFDM symbol in the perception reference signal includes a first number N S The time domain sampling point, the cyclic prefix in the perception reference signal includes a second number N CP time domain samples.

[0240] The detection unit 1120 is configured to detect the synaesthesia environment and obtain a perception echo signal, wherein the perception echo signal is a signal reflected by a perception reference signal via a perception target in the synaesthesia environment.

[0241] The processing unit 1130 is configured to perform radio frequency preprocessing on the sensed echo signal to obtain a first baseband signal and delete the frontmost signal in the first baseband signal. and the last N CP time domain sample points to obtain a second baseband signal.

[0242] The identification unit 1140 is configured to identify the distance between the perception target and the perception device in the synaesthesia environment based on the second baseband signal.

[0243] As a possible implementation, the perception reference signal is generated using the following units:

[0244] An acquisition unit, configured to acquire a comb factor configured for the perception reference signal; wherein the comb factor is greater than a set value;

[0245] A first generating unit is configured to generate a frequency domain reference sequence according to a frequency spectrum range used by the sensing device, and map the frequency domain reference sequence into a frequency domain reference signal according to a comb factor;

[0246] The second generating unit is configured to generate a time domain baseband signal according to the frequency domain reference signal and add a cyclic prefix to the time domain baseband signal; wherein the OFDM symbol in the time domain baseband signal includes N S time domain samples, the cyclic prefix contains N CP time domain samples;

[0247] The mixing unit is used to up-mix the time domain baseband signal after adding the cyclic prefix to obtain a perception reference signal.

[0248] As a possible implementation method, the second generation unit is specifically used to: increase the power of the frequency domain reference signal according to the comb factor to obtain an adjusted frequency domain reference signal; perform IFFT transformation on the adjusted frequency domain reference signal to obtain a time domain baseband signal.

[0249] As a possible implementation manner, the identification unit 1140 is specifically configured to: perform channel estimation on the second baseband signal to obtain a target channel estimation result; and identify the distance between the sensing target and the sensing device according to the target channel estimation result.

[0250] As a possible implementation, the identification unit 1140 is specifically configured to: Determine the FFT length; perform FFT transformation on the second baseband signal according to the FFT length to obtain a frequency domain received signal; perform frequency domain channel estimation on the frequency domain received signal to obtain an intermediate channel estimation result; perform delay domain channel estimation on the intermediate channel estimation result to obtain a target channel estimation result.

[0251] As a possible implementation method, the perception reference signal is generated based on the frequency domain reference signal, which includes multiple frequency domain samples; the identification unit 1140 is specifically used to: determine the target frequency domain sample carrying the reference signal from the multiple frequency domain samples in the frequency domain reference signal; perform frequency domain channel estimation on the frequency domain received signal based on the conjugate of the sampling value of the target frequency domain sample in the frequency domain reference signal to obtain an intermediate channel estimation result.

[0252] As a possible implementation manner, the identification unit 1140 is specifically configured to: perform IFFT transformation on the intermediate channel estimation result based on the FFT length to obtain the target channel estimation result.

[0253] As a possible implementation method, the target channel estimation result includes multiple time domain sampling points; the identification unit 1140 is specifically used to: determine the target time domain sampling point belonging to the perception target from the multiple time domain sampling points of the target channel estimation result; determine the delay of the perception target based on the arrangement position of the target time domain sampling point in the target channel estimation result; determine the distance between the perception target and the perception device based on the delay of the perception target.

[0254] As a possible implementation, the identification unit 1140 is specifically configured to: obtain a subcarrier spacing SCS between multiple subcarriers within the bandwidth occupied by the perception reference signal; and S , determine the intermediate frequency sampling interval; determine the delay of sensing the target based on the product of the intermediate frequency sampling interval and the arrangement position.

[0255] As a possible implementation manner, the identification unit 1140 is specifically configured to determine the distance between the sensing target and the sensing device according to the product of the speed of light and the time delay.

[0256] It should be noted here that the target perception recognition device provided in the embodiment of the present application can implement all the method steps implemented in the method embodiments of Figures 2 to 5 above, and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be described in detail here.

[0257] It should be noted that the division of units in the embodiments of the present application is schematic and is merely a logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0258] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network side device, etc.) or a processor to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0259] On the other hand, an embodiment of the present application further provides a processor-readable storage medium, which stores a computer program, and the computer program is used to enable the processor to execute the method shown in any embodiment of Figures 2 to 5 of the present application.

[0260] Among them, the above-mentioned processor-readable storage medium can be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic storage (such as floppy disks, hard disks, tapes, magneto-optical disks (MO)), optical storage (such as CDs, DVDs, BDs, HVDs, etc.), and semiconductor storage (such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drives (SSDs)), etc.

[0261] In order to implement the above embodiments, the present application also proposes a computer program product.

[0262] The computer program product includes a computer program, which, when executed by a processor, implements the method shown in any one of the embodiments of FIG. 2 to FIG. 5 of the present application.

[0263] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) that contain computer-usable program code.

[0264] The present application is described with reference to the flowchart and / or block diagram of the method, device (system), and computer program product according to the embodiment of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, and the combination of the process and / or box in the flowchart and / or block diagram can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processing machine or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the function specified in one process or multiple processes in the flowchart and / or one box or multiple boxes in the block diagram.

[0265] These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the processor-readable memory produce a product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0266] These processor-executable instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0267] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A recognition method for a perceived target, characterized in that, Applied to a sensing device, including: Send a sensing reference signal to the synesthesia environment; wherein, the comb factor of the sensing reference signal is greater than a set value, and the OFDM symbols in the sensing reference signal include a first number N S of time-domain samples, and the cyclic prefix in the sensing reference signal includes a second number N CP of time-domain samples; Detect the communication and sensing environment to obtain a sensing echo signal, where the sensing echo signal is a signal reflected by a sensing target in the communication and sensing environment from the sensing reference signal; Perform RF preprocessing on the sensed echo signal to obtain a first baseband signal, and delete the frontmost The first and the last N CP time domain samples to obtain a second baseband signal; Based on the second baseband signal, identify the distance between the sensing target in the communication and sensing environment and the sensing device.

2. The method according to claim 1, wherein The sensing reference signal is generated by the following steps: Obtain the comb factor configured for the sensing reference signal; where the comb factor is greater than a set value; Generate a frequency-domain reference sequence according to the frequency spectrum range used by the sensing device, and map the frequency-domain reference sequence to a frequency-domain reference signal according to the comb factor; Generate a time-domain baseband signal according to the frequency-domain reference signal, and add a cyclic prefix to the time-domain baseband signal; wherein, there are N S time-domain samples on the OFDM symbol in the time-domain baseband signal, and there are N CP time-domain samples on the cyclic prefix; Perform upmixing on the time-domain baseband signal after adding a cyclic prefix to obtain the sensing reference signal.

3. The method according to claim 2, wherein The generation of the time-domain baseband signal according to the frequency-domain reference signal includes: According to the comb factor, increase the power of the frequency-domain reference signal to obtain an adjusted frequency-domain reference signal; Perform an IFFT transform on the adjusted frequency-domain reference signal to obtain the time-domain baseband signal.

4. The method according to any one of claims 1-3, characterized in that, The identification of the distance between the sensing target in the communication and sensing environment and the sensing device based on the second baseband signal includes: Perform channel estimation on the second baseband signal to obtain a target channel estimation result; According to the target channel estimation result, identify the distance between the sensing target and the sensing device.

5. The method according to claim 4, wherein The performing of channel estimation on the second baseband signal to obtain a target channel estimation result includes: According to the said Determine the FFT length; According to the FFT length, perform an FFT transform on the second baseband signal to obtain a frequency-domain received signal; Perform frequency-domain channel estimation on the frequency-domain received signal to obtain an intermediate channel estimation result; Perform time-delay domain channel estimation on the intermediate channel estimation result to obtain the target channel estimation result.

6. The method according to claim 5, wherein The sensing reference signal is generated according to a frequency-domain reference signal, and the frequency-domain reference signal includes a plurality of frequency-domain samples; The performing of frequency-domain channel estimation on the frequency-domain received signal to obtain an intermediate channel estimation result includes: From the plurality of frequency-domain samples in the frequency-domain reference signal, determine the target frequency-domain samples carrying the reference signal; According to the conjugate of the sampling value of the target frequency-domain samples in the frequency-domain reference signal, perform frequency-domain channel estimation on the frequency-domain received signal to obtain an intermediate channel estimation result.

7. The method according to claim 5 or 6, characterized in that, The performing of time-delay domain channel estimation on the intermediate channel estimation result to obtain the target channel estimation result includes: Based on the FFT length, perform an IFFT transform on the intermediate channel estimation result to obtain the target channel estimation result.

8. The method according to any one of claims 4 to 7, characterized in that The target channel estimation result includes a plurality of time-domain samples; The identification of the distance between the sensing target and the sensing device according to the target channel estimation result includes: From the plurality of time-domain samples of the target channel estimation result, determine the target time-domain samples belonging to the sensing target; According to the arrangement position of the target time-domain samples in the target channel estimation result, determine the time delay of the sensing target. Determine the distance between the sensing target and the sensing device according to the time delay of the sensing target.

9. The method according to claim 8, wherein The determining the time delay of the sensing target according to the permutation position of the target time-domain sample points in the target channel estimation result includes: Obtain the subcarrier spacing SCS between multiple subcarriers within the occupied bandwidth of the sensing reference signal; Based on the SCS and the N S , determine the intermediate frequency sampling interval; Determine the time delay of the sensing target according to the product of the intermediate frequency sampling interval and the permutation position.

10. The method according to claim 8 or 9, characterized in that The determining the distance between the sensing target and the sensing device according to the time delay of the sensing target includes: Determine the distance between the sensing target and the sensing device according to the product of the speed of light and the time delay.

11. A sensing device, characterized in that, Including a memory, a transceiver, and a processor; The memory is used to store computer programs; the transceiver is used to transmit and receive data under the control of the processor; the processor is used to read the computer programs in the memory and perform the following operations: Send a sensing reference signal to the synesthesia environment; wherein, the comb factor of the sensing reference signal is greater than a set value, and the OFDM symbols in the sensing reference signal include a first number N S of time-domain samples, and the cyclic prefix in the sensing reference signal includes a second number N CP of time-domain samples; Detect the communication and sensing environment to obtain a sensing echo signal, where the sensing echo signal is a signal reflected by the sensing reference signal through a sensing target in the communication and sensing environment; Perform RF preprocessing on the sensed echo signal to obtain a first baseband signal, and delete the foremost The first and the last N CP time domain samples to obtain a second baseband signal; Based on the second baseband signal, identify the distance between the sensing target and the sensing device in the communication and sensing environment.

12. The sensing device according to claim 11, wherein The processor performs the following steps to generate a sensing reference signal: Obtain the comb factor configured for the sensing reference signal; where the comb factor is greater than a set value; Generate a frequency-domain reference sequence according to the frequency spectrum range used by the sensing device, and map the frequency-domain reference sequence to a frequency-domain reference signal according to the comb factor; Generate a time-domain baseband signal according to the frequency-domain reference signal, and add a cyclic prefix to the time-domain baseband signal; wherein, the OFDM symbol in the time-domain baseband signal includes N S time-domain samples, and the cyclic prefix contains N CP time-domain samples; Perform upmixing on the time-domain baseband signal after adding a cyclic prefix to obtain the sensing reference signal.

13. The sensing device according to claim 12, wherein The processor performs generating a time-domain baseband signal according to the frequency-domain reference signal, specifically: According to the comb factor, increase the power of the frequency-domain reference signal to obtain an adjusted frequency-domain reference signal; Perform IFFT transformation on the adjusted frequency-domain reference signal to obtain the time-domain baseband signal.

14. The sensing device according to any one of claims 11-13, characterized in that, The processor performs identifying the distance between the sensing target and the sensing device in the communication and sensing environment based on the second baseband signal, specifically: Perform channel estimation on the second baseband signal to obtain a target channel estimation result; According to the target channel estimation result, identify the distance between the sensing target and the sensing device.

15. The sensing device according to claim 14, wherein The processor performs performing channel estimation on the second baseband signal to obtain a target channel estimation result, specifically: According to the said Determine the FFT length; According to the FFT length, perform FFT transformation on the second baseband signal to obtain a frequency-domain received signal; Perform frequency-domain channel estimation on the frequency-domain received signal to obtain an intermediate channel estimation result; Perform time-delay domain channel estimation on the intermediate channel estimation result to obtain the target channel estimation result.

16. The sensing device according to claim 15, wherein The sensing reference signal is generated according to a frequency-domain reference signal, and the frequency-domain reference signal includes multiple frequency-domain sample points; The processor performs performing frequency-domain channel estimation on the frequency-domain received signal to obtain an intermediate channel estimation result, specifically: Determine target frequency-domain samples carrying the reference signal from among the multiple frequency-domain samples in the frequency-domain reference signal; Perform frequency-domain channel estimation on the frequency-domain received signal according to the conjugate of the sampling value of the target frequency-domain samples in the frequency-domain reference signal to obtain an intermediate channel estimation result.

17. The sensing device according to claim 15 or 16, characterized in that, The processor performs time-delay domain channel estimation on the intermediate channel estimation result to obtain the target channel estimation result, specifically: Based on the FFT length, perform an IFFT transform on the intermediate channel estimation result to obtain the target channel estimation result.

18. The sensing device according to any one of claims 14-17, characterized in that The target channel estimation result includes multiple time-domain samples; The processor performs identifying the distance between the sensing target and the sensing device according to the target channel estimation result, specifically: Determine target time-domain samples belonging to the sensing target from among the multiple time-domain samples of the target channel estimation result; Determine the time delay of the sensing target according to the arrangement position of the target time-domain samples in the target channel estimation result; Determine the distance between the sensing target and the sensing device according to the time delay of the sensing target.

19. The sensing device according to claim 18, wherein The processor performs determining the time delay of the sensing target according to the arrangement position of the target time-domain samples in the target channel estimation result, specifically: Obtain the subcarrier spacing SCS between multiple subcarriers within the occupied bandwidth of the sensing reference signal; Based on the SCS and the N S , determine the intermediate frequency sampling interval; Determine the time delay of the sensing target according to the product of the intermediate frequency sampling interval and the arrangement position.

20. The sensing device according to claim 18 or 19, characterized in that, The processor performs determining the distance between the sensing target and the sensing device according to the time delay of the sensing target, specifically: Determine the distance between the sensing target and the sensing device according to the product of the speed of light and the time delay.

21. An identification device for sensing a target, characterized in that, Applied to a sensing device, it includes: A transmitting unit, configured to transmit a sensing reference signal to a communication and sensing environment; wherein, a comb factor of the sensing reference signal is greater than a set value, and a first number N of time-domain samples are included on an OFDM symbol in the sensing reference signal, and a second number N of time-domain samples are included on a cyclic prefix in the sensing reference signal; S CP ​​ A detection unit for detecting the communication and sensing environment to obtain a sensing echo signal, where the sensing echo signal is a signal reflected by the sensing reference signal through a sensing target in the communication and sensing environment; A processing unit, configured to perform radio frequency preprocessing on the sensed echo signal to obtain a first baseband signal, and delete the frontmost The first and the last N CP time domain samples to obtain a second baseband signal; An identification unit for identifying the distance between a sensing target and the sensing device in the communication and sensing environment based on the second baseband signal.

22. A processor-readable storage medium, characterized in that, The processor-readable storage medium stores a computer program, and the computer program is used to cause the processor to execute the method for identifying a sensing target according to any one of claims 1 to 10.

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