Method, apparatus, perceptual device, and storage medium for identifying perceptual targets

Abstract

This application provides a method, apparatus, perceptual device, and storage medium for identifying a perceptual target, relating to the field of communications technology. In one implementation, a perceptual reference signal is transmitted to a synesthetically controlled environment, and when the compliance of the perceptual reference signal is greater than a set value, an OFDM symbol in the perceptual reference signal is identified. S Each time-domain sample point contains N cyclic prefixes within the perceptual reference signal. CP The time-domain sample points include a synesthetic environment, and a perceptual echo signal is obtained, which is the signal of the perceptual reference signal reflected by the perceptual target in the synesthetic environment. Radio frequency preprocessing is performed on the perceptual echo signal to obtain a first baseband signal, and the first N in the first baseband signal. S / 2 and the last N CP The method involves deleting time-domain sample points to obtain a second baseband signal, and then identifying the distance between the perceived target and the perceived device based on this second baseband signal. This not only increases the perceived ranging range but also ensures that the time-frequency resources of the original system are not wasted.

Description

[Technical Field]

[0001] [Cross-reference of related applications] This application claims priority to the Chinese Patent Application Serial Number "202410116615.4" filed by Datang Mobile Communications Equipment Co., Ltd. on January 26, 2024, with the title of the invention "Method, Apparatus, Perceptual Device, and Storage Medium for Identifying a Perceptual Target".

[0002] This application relates to the field of communications technology, and more particularly to a method, apparatus, perceptual device, and storage medium for identifying perceptual targets. [Background technology]

[0003] In the application of synesthesia-integrated ranging in communication systems, the ranging range of the perceived target depends on the cyclic prefix (CP) length of the OFDM (Orthogonal Frequency Division Multiplexing) symbols in the perceived reference signal. For example, in a typical 30 kHz subcarrier spacing configuration, the duration of an OFDM symbol is 1 / 30 kHz = 33.33 us (microseconds), and a typical CP length is 2.34 us. When transmission and reception are synchronized, the ranging range of the perceived target is approximately 350 meters.

[0004] To extend the distance range of a perceived target by extending the CP length of the original OFDM symbols, for example, if the number of OFDM symbols in one time slot is reduced from the original 14 to 12, the CP length can be extended to approximately 8.33 us, and the distance range can be extended to 1.25 kilometers.

[0005] However, the aforementioned method of extending the ranging range sacrifices the time-domain resources of two OFDM symbols, resulting in a waste of resources. [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] This application provides a method, apparatus, perceptual device, and storage medium for identifying a perceptual target. [Means for solving the problem]

[0007] According to one aspect of this application, a method for identifying a perceptual target applied to a perceptual device, comprising the steps of transmitting a perceptual reference signal to a synesthetically connected environment, wherein the conformance of the perceptual reference signal is greater than a set value, and the OFDM symbols in the perceptual reference signal are given a first number (N S The time-domain sample points of ) are included, and the cyclic prefix in the perceptual reference signal contains a second number (N CP The steps include: including time-domain sample points of ) and detecting a synesthetic environment and obtaining a perceptual echo signal, wherein the perceptual echo signal is a signal reflected by a perceptual target in the synesthetic environment as a perceptual reference signal; and performing radio frequency preprocessing on the perceptual echo signal to obtain a first baseband signal, and the first N in the first baseband signal S / 2 and the last N CP A method for identifying a perceptual target is provided, which includes the steps of: deleting time-domain sample points to obtain a second baseband signal; and identifying the distance between a perceptual target and a perceptual device in a synesthetic environment based on the second baseband signal.

[0008] In one possible implementation, the perceptual reference signal is obtained by taking the steps of acquiring a set conformance to the perceptual reference signal, wherein the conformance is greater than the set value; generating a frequency-domain reference sequence based on the spectral range used by the perceptual device; mapping the frequency-domain reference sequence to the frequency-domain reference signal based on the conformance; generating a time-domain baseband signal based on 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 is N S It contains time-domain sample points and has a cyclic prefix of NCP It is generated using a step that includes a time-domain sample point and a step that upmixes a time-domain baseband signal with a cyclic prefix added to obtain a perceptual reference signal.

[0009] In one possible implementation, the step of generating a time-domain baseband signal based on a frequency-domain reference signal includes the steps of increasing the power of the frequency-domain reference signal based on a compact factor to obtain a tuned frequency-domain reference signal, and performing an IFFT transform on the tuned frequency-domain reference signal to obtain a time-domain baseband signal.

[0010] In one possible implementation, the step of identifying the distance between a perceptual target and a perceptual device in a synesthetic environment based on a second baseband signal includes the steps of performing channel estimation on the second baseband signal to obtain a target channel estimation result, and identifying the distance between the perceptual target and the perceptual device based on the target channel estimation result.

[0011] In one possible implementation, the step of performing channel estimation on a second baseband signal to obtain a target channel estimation result is N S The process includes the steps of: determining the FFT length based on / 2; performing an FFT transform on a second baseband signal based on the FFT length to obtain a frequency-domain received signal; performing frequency-domain channel estimation on the frequency-domain received signal to obtain an intermediate channel estimation result; and performing time-delay domain channel estimation on the intermediate channel estimation result to obtain a target channel estimation result.

[0012] In one possible implementation, a perceptual reference signal is generated based on a frequency-domain reference signal, the frequency-domain reference signal includes multiple frequency-domain sample points, and the step of performing frequency-domain channel estimation on a frequency-domain received signal to obtain an intermediate channel estimation result includes the steps of determining a target frequency-domain sample point carrying the reference signal from multiple frequency-domain sample points in the frequency-domain reference signal, and performing 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.

[0013] In one possible implementation, the step of performing time-delayed region channel estimation on the intermediate channel estimation result to obtain the target channel estimation result includes the step of performing an IFFT transform on the intermediate channel estimation result based on the FFT length to obtain the target channel estimation result.

[0014] In one possible implementation, the target channel estimation result includes multiple time-domain sample points, and the step of identifying the distance between a perceptual target and a perceptual device based on the target channel estimation result includes the steps of determining the target time-domain sample points belonging to the perceptual target from the multiple time-domain sample points of the target channel estimation result, determining the time delay of the perceptual target based on the order in which the target time-domain sample points are arranged in the target channel estimation result, and determining the distance between the perceptual target and the perceptual device based on the time delay of the perceptual target.

[0015] In one possible implementation, the step of determining the time delay of the perceived target based on the order in which the target time-domain sample points are arranged in the target channel estimation result is to obtain the subcarrier spacing (SCS) between multiple subcarriers within the bandwidth occupied by the perceived reference signal, and the SCS and N SBased on this, it includes the step of determining an intermediate frequency sampling interval, and the step of determining a time delay of the perceptual target based on the product of the intermediate frequency sampling interval and the rank arranged therewith.

[0016] In a possible implementation, the step of determining the distance between the perceptual target and the perceptual device based on the time delay of the perceptual target includes the step of determining the distance between the perceptual target and the perceptual device based on the product of the speed of light and the time delay.

[0017] According to another aspect of the present application, it includes a memory, a transceiver, and a processor. The memory is used to store a computer program, the transceiver is used to transmit and receive data under the control of the processor, and the processor reads the computer program in the memory to perform an operation of transmitting a perceptual reference signal to the synaesthetic environment, where the comfactor of the perceptual reference signal is greater than a set value, and the OFDM symbol in the perceptual reference signal includes a first number (N S ) of time domain sample points, and the cyclic prefix in the perceptual reference signal includes a second number (N CP ) of time domain sample points, an operation of detecting the synaesthetic environment and obtaining a perceptual echo signal, where the perceptual echo signal is a signal reflected by the perceptual reference signal by a perceptual target in the synaesthetic environment, an operation of performing radio frequency preprocessing on the perceptual echo signal to obtain a first baseband signal, and deleting the first N S / 2 and the last N CP time domain sample points in the first baseband signal to obtain a second baseband signal, and an operation of identifying the distance between the perceptual target and the perceptual device in the synaesthetic environment based on the second baseband signal. A perceptual device is provided to execute the above operations.

[0018] In one possible implementation, the processor takes the steps of: obtaining a set conformance for a perceptual reference signal, wherein the conformance is greater than a set value; generating a frequency-domain reference sequence based on the spectral range used by the perceptual device; mapping the frequency-domain reference sequence to a frequency-domain reference signal based on the conformance; generating a time-domain baseband signal based on 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 is N S It contains time-domain sample points and has a cyclic prefix of N CP A perceptual reference signal is generated by performing a step that includes a time-domain sample point and a step that upmixes a time-domain baseband signal to which a cyclic prefix has been added to obtain a perceptual reference signal.

[0019] In one possible implementation, the processor performs the step of generating a time-domain baseband signal based on a frequency-domain reference signal, which specifically involves increasing the power of the frequency-domain reference signal based on the compression factor to obtain a tuned frequency-domain reference signal, and then performing an IFFT transform on the tuned frequency-domain reference signal to obtain a time-domain baseband signal.

[0020] In one possible implementation, the processor performs the step of identifying the distance between a perceptual target and a perceptual device in a synesthetic environment based on a second baseband signal, which specifically involves performing channel estimation on the second baseband signal to obtain a target channel estimation result, and then identifying the distance between the perceptual target and the perceptual device based on the target channel estimation result.

[0021] In one possible implementation, the processor performs the step of performing channel estimation on a second baseband signal to obtain a target channel estimation result, specifically, N SThe process involves determining the FFT length based on / 2, performing an FFT transform on the second baseband signal based on the FFT length to obtain the frequency-domain received signal, performing frequency-domain channel estimation on the frequency-domain received signal to obtain the intermediate channel estimation result, and performing time-delay domain channel estimation on the intermediate channel estimation result to obtain the target channel estimation result.

[0022] In one possible implementation, the perceptual reference signal is generated based on a frequency-domain reference signal, the frequency-domain reference signal contains multiple frequency-domain sample points, and the processor performs the step of performing frequency-domain channel estimation on the frequency-domain received signal to obtain an intermediate channel estimation result, which specifically involves determining a target frequency-domain sample point carrying the reference signal from multiple frequency-domain sample points in the frequency-domain reference signal, and performing frequency-domain channel estimation on the frequency-domain received signal to obtain an intermediate channel estimation result based on the conjugate of the sampling value of the target frequency-domain sample point in the frequency-domain reference signal.

[0023] In one possible implementation, the processor performs the step of performing time-delayed-domain channel estimation on the intermediate channel estimation result to obtain the target channel estimation result, which specifically involves performing an IFFT transform on the intermediate channel estimation result based on the FFT length to obtain the target channel estimation result.

[0024] In one possible implementation, the target channel estimation result includes multiple time-domain sample points, and the processor performs the step of identifying the distance between the perceived target and the perceived device based on the target channel estimation result, which specifically involves determining which target time-domain sample points belong to the perceived target from the multiple time-domain sample points in the target channel estimation result, determining the time delay of the perceived target based on the order in which the target time-domain sample points are arranged in the target channel estimation result, and determining the distance between the perceived target and the perceived device based on the time delay of the perceived target.

[0025] In one possible implementation, the processor performs the step of determining the time delay of the perceived target based on the order in which the target time-domain sample points are arranged in the target channel estimation result, specifically by obtaining the subcarrier spacing (SCS) between multiple subcarriers within the bandwidth occupied by the perceived reference signal, and the SCS and N S Based on this, the intermediate frequency sampling interval is determined, and the time delay of the perceived target is determined based on the product of the intermediate frequency sampling interval and the ranking.

[0026] In one possible implementation, the step of the processor determining the distance between the perceptual target and the perceptual device based on the time delay of the perceptual target is, more specifically, determining the distance between the perceptual target and the perceptual device based on the product of the speed of light and the time delay.

[0027] According to another aspect of this application, a perceptual target identification device applied to a perceptual device, comprising a transmitting unit configured to transmit a perceptual reference signal to a synesthetically controlled environment, wherein the conformance of the perceptual reference signal is greater than a set value, and the OFDM symbols in the perceptual reference signal are a first number (N S The time-domain sample points of ) are included, and the cyclic prefix in the perceptual reference signal contains a second number (N CPA transmitting unit containing time-domain sample points of ) and a detection unit configured to detect a synesthetic environment and acquire a perceptual echo signal, wherein the perceptual reference signal is a signal reflected by a perceptual target in the synesthetic environment and the detection unit performs radio frequency preprocessing on the perceptual echo signal to acquire a first baseband signal, and the first N in the first baseband signal S / 2 and the last N CP A perceptual target identification device is provided, which includes a processing unit configured to delete time-domain sample points to obtain a second baseband signal, and an identification unit configured to identify the distance between a perceptual target and a perceptual device in a synesthetic environment based on the second baseband signal.

[0028] In one possible implementation, the perceptual reference signal is generated by an acquisition unit, a first generation unit, a second generation unit, and a mixing unit. The acquisition unit is configured to acquire a set conformance factor for a perceptual reference signal, and if the conformance factor is greater than the set value, The first generation unit is configured to generate a frequency-domain reference sequence based on the spectral range used by the perceptual device, and to map the frequency-domain reference sequence to a frequency-domain reference signal based on the conformance. The second generation unit is configured to generate a time-domain baseband signal based on a frequency-domain reference signal and to add a cyclic prefix to the time-domain baseband signal, with N added to the OFDM symbols in the time-domain baseband signal. S It contains time-domain sample points and has a cyclic prefix of N CP This includes a time-domain sample point, The mixing unit is configured to upmix a time-domain baseband signal to which a cyclic prefix has been added in order to obtain a perceptual reference signal.

[0029] In one possible implementation, the second generation unit is configured to specifically increase the power of the frequency-domain reference signal based on the compact factor to obtain a tuned frequency-domain reference signal, and then perform an IFFT transform on the tuned frequency-domain reference signal to obtain a time-domain baseband signal.

[0030] In one possible implementation, the identification unit is configured to perform channel estimation on a second baseband signal to obtain a target channel estimation result, and to identify the distance between the perceived target and the perceived device based on the target channel estimation result.

[0031] In one possible implementation, the identification unit is specifically N S The system is configured to determine the FFT length based on / 2, perform an FFT transform on the second baseband signal based on the FFT length to obtain the frequency-domain received signal, perform frequency-domain channel estimation on the frequency-domain received signal to obtain the intermediate channel estimation result, and perform time-delay domain channel estimation on the intermediate channel estimation result to obtain the target channel estimation result.

[0032] In one possible implementation, a perceptual reference signal is generated based on a frequency-domain reference signal, the frequency-domain reference signal includes multiple frequency-domain sample points, and the discrimination unit is configured to determine a target frequency-domain sample point carrying the reference signal from the multiple frequency-domain sample points in the frequency-domain reference signal, and to 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.

[0033] In one possible implementation, the identification unit is configured to perform an IFFT transformation on the intermediate channel estimation result based on the FFT length to obtain the target channel estimation result.

[0034] In one possible implementation, the target channel estimation result includes multiple time-domain sample points, and the identification unit is configured to specifically determine which target time-domain sample points belong to the perceptual target from the multiple time-domain sample points of the target channel estimation result, determine the time delay of the perceptual target based on the order in which the target time-domain sample points are arranged in the target channel estimation result, and determine the distance between the perceptual target and the perceptual device based on the time delay of the perceptual target.

[0035] In one possible implementation, the identification unit specifically obtains the subcarrier spacing (SCS) between multiple subcarriers within the bandwidth occupied by the perceptual reference signal, and the SCS and N S Based on this, the intermediate frequency sampling interval is determined, and the time delay of the perceived target is determined based on the product of the intermediate frequency sampling interval and the ranking.

[0036] In one possible implementation, the identification unit is configured to determine the distance between a perceived target and a perceived device based on the product of the speed of light and the time delay.

[0037] According to another aspect of this application, a processor-readable storage medium is provided, in which a computer program is stored, the computer program being used to cause the processor to perform a method for identifying any one of the aforementioned perceptual targets.

[0038] According to another aspect of this application, a computer program product is provided, wherein when instructions in the computer program product are executed by a processor, the method for identifying any one of the aforementioned perceptual targets is performed.

[0039] This application provides the following technical effects: Without changing the conventional OFDM setting method and the transmission format of the perceptual reference signal, it is possible to effectively extend the perceptual ranging range by setting the common factor of the perceptual reference signal to a value greater than the set value (for example, the common factor can be set to 2). For example, if the SCS between multiple subcarriers within the bandwidth occupied by the perceptual reference signal is 30 kHz, then when the common factor of the perceptual reference signal = 2, the equivalent subcarrier spacing becomes 60 kHz, and the equivalent CP length is extended to 1 / 60 kHz + the time length of the original cyclic prefix in the perceptual reference signal. For example, if the SCS is 30 kHz, the time length of the original cyclic prefix in the perceptual reference signal is 2.34 us, in which case the equivalent CP length is extended to 16.67 us + 2.34 us = 19.01 us, and the perceptual ranging range is extended from the original 350 meters to 2.5 kilometers. This not only increases the perceptual ranging range but also ensures that the time-frequency resources of the original system are not wasted.

[0040] It should be understood that the contents described in this section are not intended to identify the main or important features of the embodiments of this application, nor are they intended to limit the scope of this application. Other features of this application will be readily apparent from the following description.

[0041] The drawings are provided for a better understanding of the present invention and do not limit this application. [Brief explanation of the drawing]

[0042] [Figure 1] This is a schematic diagram showing the perceived distance range of conventional CP length. [Figure 2] This is a schematic flowchart of the method for identifying a perceptual target according to an embodiment of this application. [Figure 3] This is a schematic flowchart of another method for identifying a perceptual target according to an embodiment of this application. [Figure 4]This is a schematic flowchart of another method for identifying a perceptual target according to an embodiment of this application. [Figure 5] This is a schematic flowchart of another method for identifying a perceptual target according to an embodiment of this application. [Figure 6] This is a schematic diagram showing the perceptual distance range of a half-symbol set based on the conformance factor according to an embodiment of this application. [Figure 7] This is a schematic diagram illustrating the principle of realizing the extension of the perceptual distance measurement range based on half-symbol perception according to an embodiment of this application. [Figure 8] This is a schematic diagram showing equivalent CP extension according to an embodiment of the present application. [Figure 9] This is a schematic diagram showing the removal of equivalent extended CP and CS according to the embodiment of this application. [Figure 10] This is a schematic diagram of the sensory device according to an embodiment of this application. [Figure 11] This is a schematic diagram of the sensory target identification device according to an embodiment of the present application. [Modes for carrying out the invention]

[0043] In embodiments of this application, the term "and / or" represents an association between related objects and indicates that there are three possible relationships. For example, "A and / or B" can represent three situations: A exists alone, A and B exist together, or B exists alone. The letter " / " generally indicates that related objects are in an "or" relationship. In the embodiments of the present invention, the term "plural" refers to two or more, and the same applies to other quantifiers.

[0044] The following description will clearly and completely explain the technical concepts in the embodiments of this application, with reference to the drawings of the embodiments. Clearly, the embodiments described are only a part of the embodiments of this application and do not encompass all embodiments. All other embodiments that can be obtained based on the embodiments of this application without creative effort by a person ordinary in the art are within the scope of protection of this application.

[0045] In the ranging application of synesthesia integration based on communication OFDM signal waveforms, the ranging range of the perceived target is limited by the CP length of the OFDM symbol. A simple idea to extend the ranging range of the perceived target is to directly extend the CP length of the original OFDM symbol. However, such a method is usually a waste of resources.

[0046] For example, in a typical 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 distance range of the perceived target is shown in Figure 1. T in Figure 1 CP is the CP length, T SYM is the duration of the OFDM symbol, and t TX is the timing time length on the perceptual transmitting side, S RX This is the perceived distance (or measuring distance) of the perceptual receiver.

[0047] As can be seen from Figure 1, when transmission and reception are synchronized, the distance measurement range of the perceived target is approximately 350 meters. For echo signals of perceived targets farther than 350 meters, a complete OFDM signal cannot be obtained within the receive detection window. Symbol crosstalk occurs between subcarriers in the echo signal, making normal channel measurement impossible and ultimately affecting the distance measurement of the perceived target. The shaded area between 350 meters and 5350 meters in Figure 1 is the detection window, meaning that the perceiving receiver can periodically detect (or perceive) OFDM signals within this detection window.

[0048] Conventional techniques lack a unified method for extending the perceptual ranging range of perceptual targets or synesthetically important objects. A simple idea is to directly extend the CP length of the original OFDM symbols. For example, reducing the number of OFDM symbols in one time slot from 14 to 12 could extend the CP length to approximately 8.33 microseconds, thereby extending the ranging range to 1.25 kilometers.

[0049] However, this method is a waste of resources because it sacrifices the time-domain resources of two OFDM symbols.

[0050] To solve at least one of the above-mentioned problems, this application provides a method, apparatus, perceptual device, and storage medium for identifying a perceptual target.

[0051] The following describes, with reference to the drawings, the method, apparatus, perceptual device, and storage medium for identifying perceptual targets according to this embodiment. Before describing the embodiments of this application in detail, the following common technical terms will be explained to facilitate understanding.

[0052] A synesthetic environment refers to the perceptual environment, that is, the set of all scatterers that a perceptual reference signal encounters as it travels from the perceptual transmitter to the perceptual receiver. For example, in the case of identifying a perceptual target in smart transportation, the synesthetic environment includes all objects in road traffic that affect the perceptual reference signal, such as vehicles, pedestrians, road infrastructure, obstacles, and animals.

[0053] This application provides an example of a case where the perceptual receiving side and the perceptual transmitting side are located in the same communication device (referred to as the perceptual device in this application).

[0054] Furthermore, the method for identifying perceptual targets described in this application is applicable to synesthetic channels or communication channels, and is also applicable to synesthetic environments. This application provides an example only when the method is applied to a synesthetic environment.

[0055] Comfactor is a parameter used to control the transmission and reception of signals, and is used to optimize the quality and efficiency of signal transmission. Comfactor can be adjusted according to the requirements and application scenarios of different systems to achieve optimal signal transmission effects.

[0056] A time-domain sample point, also known as a time-domain sampling point, refers to a sampling point obtained by sampling a time-domain signal.

[0057] A frequency-domain sample point, also known as a frequency-domain sampling point, refers to a sampling point obtained by sampling a frequency-domain signal. The number of frequency-domain sample points is less than or equal to the length of the FFT (Fast Fourier Transform), and each frequency-domain sample point corresponds to one subcarrier.

[0058] Perceived Targets: Perceived targets may differ in different application scenarios. For example, in a smart transportation scenario, perceived targets may be vehicles, pedestrians, animals (e.g., pets), objects (e.g., road blockages, trash), etc. In a smart factory scenario, perceived targets may be mobile robots / robot arms, products, other devices, etc.

[0059] Perception Devices: Perception devices may differ in different application scenarios. For example, in a smart transportation scenario, perception devices may be access network devices, roadside units, vehicles, etc. In a smart factory scenario, perception devices may be fixed devices, mobile devices, etc., within the smart factory, but the embodiments of this application are not limited to these.

[0060] Let's take the example of an access network device being a base station. A base station can include multiple cells that provide services to terminals. Depending on the specific application, a base station may also be called an access point, a device in an access network that communicates with radio terminals via an air interface through one or more sectors, or by other names. An access network device can convert received air frames to and from Internet Protocol (IP) packets and may include an Internet Protocol (IP) communication network as a router between radio terminals and the rest of the access network. An access network device can also coordinate the property management of the air interface. For example, the access network device according to the embodiment of this application may be an access network device (Base Transceiver Station, BTS) in a Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA), an access network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA®), an evolutionary access network device (eNB or e-NodeB) in a long-term evolution (LTE) system, a 5G base station (gNB) in a 5G network architecture (next generation system), a home evolved base station (HeNB), a relay node, a home base station (femto), a pico base station (pico), etc., but the embodiment of this application is not limited to these.In some network configurations, access network devices may include centralized unit (CU) nodes and distributed unit (DU) nodes. The centralized and distributed units may be geographically separated.

[0061] A terminal may refer to a device that provides voice and / or data connectivity to a user, a handheld device with wireless connectivity, or other processing device connected to a wireless modem. The name of a terminal may differ in different systems. For example, in a 5G system, a terminal may be called User Equipment (UE). A wireless terminal can communicate with one or more Core Networks (CN) via a Radio Access Network (RAN). A wireless terminal may be a mobile device such as a mobile phone (also called a "cellular" phone), or a computer with a mobile device, and may be a portable, pocket-sized, handheld, computer-integrated, or in-vehicle mobile device capable of exchanging voice and / or data with a Radio Access Network. Examples include Personal Communication Service (PCS) phones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). A wireless terminal may also be called a system, subscriber unit, subscriber station, mobile station, mobile, remote station, access point, remote terminal, access terminal, user terminal, user agent, or user device, but the embodiments of this application are not limited to these.

[0062] Figure 2 is a schematic flowchart of the method for identifying a perceptual target according to an embodiment of this application. The method for identifying perceptual targets in the embodiments of this application is applicable to perceptual devices. As shown in Figure 2, the method for identifying the perceptual target may include the following steps S201 to S204.

[0063] In step S201, a perceptual reference signal is sent to the synesthetic environment, and if the compliance of the perceptual reference signal is greater than a set value, the OFDM symbol in the perceptual reference signal is set to a first number (N S The time-domain sample points of ) are included, and the cyclic prefix in the perceptual reference signal contains a second number (N CP This includes time-domain sample points.

[0064] The setting value is a pre-configured value; for example, the setting value may be 1. A greater-than-set value for the perceived reference signal's compaction means that multiple identical perceived reference signals exist in the frequency domain. This configuration allows for increased power of the perceived reference signal on each RE (Resource Element), resulting in a proportional improvement in signal strength. Furthermore, a greater-than-set value for the perceived reference signal's compaction allows more antennas to transmit the perceived reference signal simultaneously. These signals form a comb structure in the frequency domain, with each frequency domain sample point (abbreviated as frequency point) carrying multiple identical reference signals. Because these reference signals are identical, they can be added together at the perceptual receiver to increase signal strength. This proportionally increases the power of the perceived reference signal and improves the signal-to-noise ratio of the signal.

[0065] In the embodiments of this application, the perceptual reference signal includes a first time length (T S OFDM symbols of ) and the second time length (T CP ) may include cyclic prefixes. OFDM symbols may include the first number (N SThe cyclic prefix may include a second number (N). CP ) may include time-domain sample points.

[0066] As an example, let's assume that the SCS (Sub-carrier Spacing) between multiple subcarriers within the bandwidth occupied by the perceptual reference signal is 30 kHz. S This can also be 1 / 30kHz = 33.33us, T CP This may be 2.34us, N S This may be 4096.

[0067] In the embodiments of this application, the perceptual device can transmit perceptual reference signals to a synesthetic environment. In step S202, the synesthetic environment is detected and a perceptual echo signal is obtained, which is the signal in which the perceptual reference signal is reflected by the perceptual target in the synesthetic environment.

[0068] In embodiments of this application, the perceptual device can further detect a synesthetic (or perceptual) environment and acquire a perceptual echo signal, which is a signal in which a perceptual reference signal is reflected or returned by a perceptual target in the synesthetic environment. For example, the perceptual device can acquire a perceptual echo signal by periodically detecting a signal within a detection window.

[0069] In step S203, radio frequency preprocessing is performed on the perceptual echo signal to obtain a first baseband signal, and the first N in the first baseband signal S / 2 and the last N CP Remove the time-domain sample points to obtain the second baseband signal. Radio frequency preprocessing includes, but is not limited to, frequency reduction processing.

[0070] In the embodiments of this application, the perceptual device can perform radio frequency preprocessing on the perceptual echo signal to obtain a baseband signal, which in this application is referred to as the first baseband signal. The perceptual device then processes the first N in the first baseband signal. S Remove 2 time-domain sample points and the last N in the first baseband signal. CP By deleting these time-domain sample points, a second baseband signal can be obtained.

[0071] In step S204, the distance between the perceptual target and the perceptual device in the synesthetic environment is identified based on the second baseband signal. In the embodiments of this application, the perceptual device can determine the distance between a perceptual target in a synesthetic environment and the perceptual device based on a second baseband signal.

[0072] The perceptual target identification method according to the embodiment of this application can effectively extend the perceptual ranging range by setting the common factor of the perceptual reference signal to a value greater than the set value (for example, the common factor can be set to 2) without changing the conventional OFDM setting method and the transmission format of the perceptual reference signal. For example, if the SCS between multiple subcarriers within the bandwidth occupied by the perceptual reference signal is 30 kHz, then when the common factor of the perceptual reference signal = 2, the equivalent subcarrier spacing becomes 60 kHz, and the equivalent CP length is extended to 1 / 60 kHz + the time length of the original cyclic prefix in the perceptual reference signal. For example, if the SCS is 30 kHz, the time length of the original cyclic prefix in the perceptual reference signal is 2.34 us, in which case the equivalent CP length is extended to 16.67 us + 2.34 us = 19.01 us, and the perceptual ranging range is extended from the original 350 meters to 2.5 kilometers. This not only increases the perceptual ranging range but also ensures that the time-frequency resources of the original system are not wasted.

[0073] To clearly explain how the perceptual reference signal is generated in the above embodiment of this application, this application further provides a method for identifying a perceptual target. Figure 3 is a schematic flowchart of another method for identifying a perceptual target according to an embodiment of this application. As shown in Figure 3, the method for identifying the perceptual target may include the following steps S301 to S308.

[0074] In step S301, the common factor set for the perceptual reference signal is obtained, and the common factor is greater than the set value.

[0075] In the embodiments of this application, a pre-configured or pre-set conformance can be obtained for a perceptual reference signal, and the conformance is greater than a set value. For example, if the common factor is K TC If it is labeled as K TC It is required that the value be greater than the set value, and a typical requirement is K TC = 2

[0076] In step S302, a frequency-domain reference sequence is generated based on the spectral range used by the perceptual device, and the frequency-domain reference sequence is mapped to a frequency-domain reference signal based on the conformance. The spectral range, also known as system bandwidth, is used to define the frequency range of signal transmission and also determines the signal transmission speed and system capacity.

[0077] In embodiments of this application, the perceptual device can generate a frequency-domain reference sequence based on the spectral range used by the perceptual device, which may be, for example, a ZC sequence (Zadoff-Chu sequence).

[0078] In the embodiments of this application, the perceptual device can further map a frequency-domain reference sequence to a frequency-domain reference signal according to a conformance setting.

[0079] In step S303, a time-domain baseband signal is generated based on a frequency-domain reference signal, and a cyclic prefix is ​​added to the time-domain baseband signal.

[0080] In embodiments of this application, the perceptual device can generate a time-domain baseband signal based on a frequency-domain reference signal, the time-domain baseband signal includes OFDM symbols, and the OFDM symbols include N S It includes individual time-domain sample points.

[0081] For example, the method for generating a time-domain baseband signal may be as follows: 1. A perceptual device can increase the power of a frequency-domain reference signal based on its conformance to obtain a tuned frequency-domain reference signal. For example, a frequency-domain reference signal is labeled S(n), where n is the number of frequency-domain sample points in the frequency-domain reference signal or the serial number of a frequency-domain sample point, and the tuned frequency-domain reference signal is

number

number

number

number

[0082] In embodiments of this application, the perceptual device may further add a cyclic prefix CP to the time-domain baseband signal, and the cyclic prefix may have N CP It includes individual time-domain sample points.

[0083] In step S304, the time-domain baseband signal to which the cyclic prefix has been added is upmixed to obtain a perceptual reference signal.

[0084] In embodiments of this application, a perceptual device can obtain a perceptual reference signal by upmixing a time-domain baseband signal to which a cyclic prefix has been added. For example, a perceptual device can obtain a perceptual reference signal by performing frequency upgrading on a time-domain baseband signal to which a cyclic prefix has been added.

[0085] In step S305, a perceptual reference signal is transmitted to the synesthetic environment. In step S306, the synesthetic environment is detected and a perceptual echo signal is acquired. A perceptual echo signal is a signal in which a perceptual reference signal is reflected by a perceptual target in a synesthetistic environment.

[0086] In step S307, radio frequency preprocessing is performed on the perceptual echo signal to obtain a first baseband signal, and the first N in the first baseband signal S / 2 and the last N CP Remove the time-domain sample points to obtain the second baseband signal. In step S308, the distance between the perceptual target and the perceptual device in the synesthetic environment is identified based on the second baseband signal.

[0087] The interpretation and explanation of steps S305 to S308 can be found in the relevant description of any one embodiment of this application, and are therefore omitted here.

[0088] In the perceptual target identification method according to the embodiment of this application, the conformance factor of the perceptual reference signal is set to be greater than a set value, and based on this, the perceptual reference signal can be considered as half an OFDM symbol (abbreviated as a half symbol) with an extended equivalent CP. In this case, the equivalent CP length exceeds the equivalent signal length. For example, if the SCS between multiple subcarriers within the bandwidth occupied by the perceptual reference signal is 30 kHz, the equivalent CP length becomes 19.01 us, and the equivalent signal length becomes 16.67 us. The perceptual ranging range is no longer limited by the CP length, and the perceptual ranging range can be extended to the distance interval covered by the entire half symbol.

[0089] To clearly explain how the distance between a perceptual target and a perceptual device in a synesthetic environment is identified based on a second baseband signal in the above embodiments of this application, this application further provides a method for identifying a perceptual target.

[0090] Figure 4 is a schematic flowchart of another method for identifying a perceptual target according to an embodiment of this application. As shown in Figure 4, the method for identifying the perceptual target may include the following steps S401 to S405.

[0091] In step S401, a perceptual reference signal is transmitted to the synesthetic environment. The conformance of the perceptual reference signal is greater than the set value, and the OFDM symbols in the perceptual reference signal have a first number (N S The time-domain sample points of ) are included, and the cyclic prefix in the perceptual reference signal contains a second number (N CP This includes time-domain sample points.

[0092] In step S402, the synesthetic environment is detected and a perceptual echo signal is acquired. A perceptual echo signal is a signal in which a perceptual reference signal is reflected by a perceptual target in a synesthetistic environment.

[0093] In step S403, radio frequency preprocessing is performed on the perceptual echo signal to obtain a first baseband signal, and the first N in the first baseband signal S / 2 and the last N CP Remove the time-domain sample points to obtain the second baseband signal. The interpretation and explanation of steps S401 to S403 can be found in the relevant description of any one embodiment of this application, and are therefore omitted here.

[0094] In step S404, channel estimation is performed on the second baseband signal to obtain the target channel estimation result. In the embodiments of this application, the perceptual device can perform channel estimation on a second baseband signal and obtain a channel estimation result, which is referred to in this application as the target channel estimation result.

[0095] In step S405, the distance between the perceived target and the perceived device is identified based on the target channel estimation result. In the embodiments of this application, the perceptual device can identify the distance between the perceptual target and the perceptual device in a synesthetic environment based on the target channel estimation result.

[0096] In any one embodiment of this application, the method for calculating the distance between the perceptual target and the perceptual device may be, for example, as follows: 1. Based on signal processing algorithms in conventional technologies, it is possible to determine or identify target time-domain sample points belonging to the perceptual target from multiple time-domain sample points of the target channel estimation result. 2. The time delay of the perceived target can be determined based on the order (or serial number) of the target time domain sample points in the target channel estimation results.

[0097] The order in which multiple time-domain sample points are arranged can be determined based on their echo time delay or reception time. The shorter the echo time delay of a time-domain sample point, the earlier its reception time. For example, multiple time-domain sample points can be sorted in order from the minimum to the maximum echo time delay. In other words, the order in which each time-domain sample point is arranged can be obtained by sorting the multiple time-domain sample points in order from the earliest to the latest reception time.

[0098] There is a positive correlation between the time delay of the perceived target and the order (or serial number) of the sample points in the target time domain described above.

[0099] As an example, a method for determining the time delay of a perceived target may be as follows: First, the SCS between multiple subcarriers within the bandwidth occupied by the perceived reference signal can be obtained. Then, the SCS and N S Based on this, the intermediate frequency sampling interval can be determined, for example, the intermediate frequency sampling interval is (1 / SCS)÷N S This may also be the case. Finally, the time delay of the perceived target can be determined based on the product of the intermediate frequency sampling interval and the order in which the target time-domain sample points are arranged.

[0100] For example, the ranking (or serial number) of the target time-domain sample points in the target channel estimation result is leveled as k, and the time delay corresponding to the perceived target is τ. K When assigned levels,

number

number

[0101] 3. Determine the distance between the perceptual target and the perceptual device based on the time delay of the perceptual target. Here, there is a positive correlation between the distance between the perceptual target and the perceptual device and the time delay of the perceptual target. For example, the distance between the perceptual target and the perceptual device is assigned a level called Range, and Range can be calculated using the following equation (4).

number

[0102] The method for identifying a perceptual target according to the embodiment of this application can effectively calculate the distance between the perceptual target and the perceptual device based on a channel estimation method, thereby improving the effectiveness of perceptual target identification.

[0103] To clearly explain how channel estimation is performed on a second baseband signal to obtain a target channel estimation result in the above embodiment of this application, this application further provides a method for identifying a perceptual target.

[0104] Figure 5 is a schematic flowchart of another method for identifying a perceptual target according to an embodiment of this application. As shown in Figure 5, the method for identifying the perceptual target may include the following steps S501 to S508.

[0105] In step S501, a perceptual reference signal is transmitted to the synesthetic environment. The conformance of the perceptual reference signal is greater than the set value, and the OFDM symbols in the perceptual reference signal have a first number (NS The time-domain sample points of ) are included, and the cyclic prefix in the perceptual reference signal contains a second number (N CP This includes time-domain sample points.

[0106] In step S502, the synesthetic environment is detected and a perceptual echo signal is acquired. A perceptual echo signal is a signal in which a perceptual reference signal is reflected by a perceptual target in a synesthetistic environment.

[0107] In step S503, radio frequency preprocessing is performed on the perceptual echo signal to obtain a first baseband signal, and the first N in the first baseband signal S / 2 and the last N CP Remove the time-domain sample points to obtain the second baseband signal. The interpretation and explanation of steps S501 to S503 can be found in the relevant description of any one embodiment of this application, and are therefore omitted here.

[0108] In step S504, N S The FFT length is determined based on / 2. FFT length and N related to this application S / 2 has a positive correlation.

[0109] As an example, the FFT length (or number of FFT points) relating to this application is

number

number

[0110] In step S505, an FFT transformation is performed on the second baseband signal based on the FFT length to obtain the frequency domain received signal. In the embodiments of this application, the perceptual device can acquire a frequency-domain received signal by performing an FFT transform on a second baseband signal based on the FFT length. For example, if the second baseband signal is labeled r(t) and the frequency domain received signal is leveled R(n),

number

[0111] In step S506, frequency domain channel estimation is performed on the frequency domain received signal to obtain the intermediate channel estimation result. In the embodiments of this application, the perceptual device can perform frequency-domain channel estimation on a frequency-domain received signal and obtain an intermediate channel estimation result.

[0112] In any one embodiment of this application, the perceptual reference signal is generated based on a frequency-domain reference signal S(n), the frequency-domain reference signal containing multiple frequency-domain sample points. In this case, the method for obtaining the intermediate channel estimation result may be, for example, as follows: 1. From multiple frequency-domain sample points within the frequency-domain reference signal, determine the target frequency-domain sample point that carries the reference signal. Since not all frequency-domain sample points contain a reference signal, this application allows for the determination of a target frequency-domain sample point carrying a reference signal from multiple frequency-domain sample points within a frequency-domain reference signal. 2. Frequency domain channel estimation is performed 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 the intermediate channel estimation result.

[0113] As an example, the intermediate channel estimation result is assigned a level CH(n), and CH(n) can be calculated using the following equation (6).

number

[0114] In step S507, time-delayed region channel estimation is performed on the intermediate channel estimation result to obtain the target channel estimation result. In the embodiments of this application, the perceptual device can perform time-delayed region channel estimation on the intermediate channel estimation result to obtain the target channel estimation result.

[0115] For example, a perceptual device can perform an IFFT transform 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 leveled as ch(t),

number

[0116] In step S508, the distance between the perceived target and the perceived device is identified based on the target channel estimation result. The interpretation and explanation of step S508 can be found in the relevant description of any one embodiment of this application, and are therefore omitted here.

[0117] The method for identifying a perceptual target according to the embodiment of this application can effectively calculate the distance between the perceptual target and the perceptual device based on a channel estimation method, thereby improving the effectiveness of perceptual target identification.

[0118] In any one embodiment of this application, the application provides an equivalent CP extension method based on a conformance setting, which enables the perception of half OFDM symbols (hereinafter abbreviated as half symbols) for a perceptual echo signal, thereby increasing the perceptual ranging range without changing the existing OFDM setting method, and effectively ensuring that the number of time-domain resources for OFDM symbols does not decrease and that communication time and frequency resources are not wasted.

[0119] In short, this application provides an equivalent CP extension method based on the compression factor setting, thereby extending the CP length and increasing the perceived ranging range, while not changing the existing OFDM setting method or reducing the number of time-domain resources of OFDM symbols, thus effectively securing communication time-frequency resources. Furthermore, although the spacing between subcarriers increases due to the compression factor setting, the bandwidth occupied by OFDM symbols remains unchanged, so the perceived resolution of distance does not change.

[0120] Taking a subcarrier interval of 30 kHz as an example, if the compression factor = 2, the equivalent subcarrier interval becomes 60 kHz. In this case, orthogonal demodulation can be achieved by detecting only 1 / 60 kHz = 16.67 microseconds (2048 time-domain sample points) of echo data, and the equivalent CP length is extended to 19.01 microseconds (16.67 microseconds of cyclic prefix + 2.34 microseconds of cyclic suffix). In this case, since the perceived distance is mainly limited by the perceived echo duration of 16.67 us, the perceived ranging range is extended to 2.5 kilometers, as shown in Figure 6.

[0121] Here, the shaded area between 1000 meters and 5350 meters in Figure 6 is the detection window, T CP is the CP length, TSYM is the duration of half of the OFDM symbol, and t TX is the timing time length on the perceptual transmitting side, S RX This is the perceived distance (or distance measurement distance) of the perceiving receiver, and in this application, we take the example of the case where the perceiving transmitter and the perceiving receiver are located on the same device (i.e., the perceiving device).

[0122] The advantage of the above proposed technology is that it does not require any changes to the perception transmission process of existing OFDM signals, and only requires processing with a subcarrier interval of 60 kHz during detection and positioning.

[0123] Although the window for detecting the echo signal in Figure 6 is shortened by half, and the signal power is also reduced by half, the compliance factor is 2, and only half of the frequency-domain sample points transmit the perceptual reference signal. Therefore, the power of the frequency-domain sample point carrying the perceptual reference signal can be increased by 3 dB (decibels), and from an energy perspective, the perceptual distance measurement range does not decrease.

[0124] When the compact factor is 4, the perceived echo duration is 8.33 u, and the perceived ranging range is 1.25 kilometers. However, the perceived ranging range actually decreases, so the optimal compact factor setting is 2. Furthermore, if the system's subcarrier interval is directly set to 60 kHz, the CP duration becomes even smaller, approximately 2.34 / 2 = 1.17 microseconds, further reducing the perceived ranging range.

[0125] As an example, assuming a subcarrier interval of 30 kHz, the conformance of the perceptual reference signal can be set to 2. Based on this, the perceptual reference signal is considered as half of the equivalent CP, an extended OFDM symbol (abbreviated as a half-symbol). In this case, the equivalent CP length (16.67 us cyclic prefix + 2.34 us cyclic suffix = 19.01 us) exceeds the equivalent signal length (16.67 us), and the perceptual ranging range is no longer limited by the CP length. The perceptual ranging range can then be extended to the distance interval covered by the entire half-symbol. When processing the perceptual echo signal, the perceptual processing is performed on the half-symbol. The realization principle for extending the perceptual ranging range based on the perception of the half-symbol mainly includes the following five parts, as shown in Figure 7.

[0126] Part 1: Transmission of perceptual reference signals based on conformance settings. This section primarily completes the transmission of the perceptual reference signal. Similar to conventional perceptual signal transmission methods, its main feature is the conformance factor K. TC This means that it needs to be larger than the set value, for example, K TC The value is 2. Its purpose is to create a condition that equivalently extends the CP length. Its characteristic is that it proportionally increases the power of the perceptual reference signal in each RE (Resource Element).

[0127] This section mainly includes the following steps: 1.1. Compatibility K of the perceptual reference signal TC Set K TC The requirement is to make it greater than the set value, and a typical requirement is K TC = 2 1.2. Based on the system bandwidth (i.e., the entire spectral range used by the perceptual device, which defines the frequency range of signal transmission and determines the signal transmission speed and system capacity), a frequency domain reference sequence (e.g., ZC sequence) is generated, K TCThe frequency-domain reference sequence is mapped to the frequency-domain reference signal according to the settings, and leveled as S(n), where n is the number of frequency-domain sample points used. 1.3, K TC Based on the settings, the power of the frequency domain reference signal is increased, and the power of the frequency domain reference signal is reduced to the original power K. TC To double it, that is,

number

number

[0128] Part two: Receiving perceptual echo signals, i.e., receiving perceptual echo signals returned by the perceptual target.

[0129] Third part: Calculate the equivalent extended CP and CS (Cyclic Suffix) lengths. For example, K TC If it is greater than the set value, for example, K TC If the value is 2, the perceptual distance measurement range is expanded by calculating the equivalent extended CP length and CS length of the perceptual reference signal.

[0130] The perceptual echo signal is subjected to radio frequency preprocessing to obtain one OFDM symbol + CP length (T S +T CP The baseband signal of ) is acquired. The number of time-domain sample points on one OFDM symbol is N. S Let N be the number of time-domain sample points corresponding to CP.CP Then, the total number of time-domain sample points of the baseband signal is (N S +N CP ).

[0131] In the conventional method, the CP with a header length of T CP is removed from the above baseband signal, and channel estimation processing is performed on the remaining OFDM symbols to perceive the distance of the perception target.

[0132] In this application, by extending the equivalent CP length to T s / 2, the perception ranging range is extended, and the equivalent CP length is

Number

Number

Number

[0133] As an example, a schematic diagram showing the equivalent CP extension is shown in FIG. 8 (in FIG. 8, OFDM refers to the entire OFDM symbol, and OFDM’ refers to a half symbol (that is, half of the OFDM symbol)). In this case, the number of time-domain sample points of the equivalent extended CP is N S / 2. Note that in this case, one CS increases, and the CS length T CS =T CP .

[0134] Part 4: Remove the equivalent extended CP and CS to obtain a half symbol (that is, half of the OFDM symbol). Perform an operation to remove the equivalent extended CP and CS in the time domain on the received perception echo signal. Since the CP removed in this process is different from the CP of the transmitted perception reference signal, it is called the removal of the equivalent extended CP, and the removal of CS is newly added.

[0135] That is, the CP removal function module in the conventional method can be modified and replaced with an equivalent extended CP removal module. The specific method is to delete the first N S +N CP / 2 time-domain sample points and the last N S time-domain sample points of the baseband signal with a length of (N CP from the baseband signal, and an echo time-domain baseband signal (described as the second baseband signal in this application) with a time length of

Number

[0136] The fifth part: Perform half-symbol channel estimation and calculate the distance of the perceived target. Perform channel estimation on the remaining half-symbol after removing the equivalent extended CP and CS, and calculate the distance of the perceived target based on the time-delay domain channel estimation (channel impulse response).

[0137] Perform channel estimation on r(t) after removing CP / CS. Since r(t) after removing CP has only the time length of a half-symbol, such an echo time-domain baseband signal may be called a half-symbol echo. Therefore, the number of FFT points or the FFT length (equal to the number of time-domain sample points of the OFDM symbol, that is, N FFT =N S ) in the conventional method needs to be reduced to half of the original, that is,

Number

[0138] In section 5.1, the half-symbol frequency domain received signal is calculated, where the number of FFT points is

number

number

number

number

[0139] Although the process for calculating the distance when the subcarrier interval is 30 kHz was described above, other similar subcarrier interval settings also fall within the scope of protection of this application.

[0140] In summary, compared to conventional technologies, the proposed technology of this application offers at least the following advantages: By setting the comb factor to a value greater than the set value (for example, the comb factor can be set to 2) without changing the transmission format of the conventional OFDM perceptual reference signal, the perceptual distance measurement range can be effectively extended, while ensuring that the time-frequency resources of the original system are not wasted. Furthermore, while the comb factor setting increases the power of the frequency-domain samples in the frequency-domain reference signal, the comb factor setting does not change the perceptual resolution of distance.

[0141] The technical solutions provided in the embodiments of this application are applicable to various systems, and in particular, to 5G systems. For example, applicable systems may include 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, and 5G New Radio (NR) systems. All of these systems include terminals and network devices. The systems may also include core network components such as the Evolved Packet System (EPS) and the 5G system (5GS).

[0142] To realize the above embodiment, this application further provides a perceptual device. Figure 10 is a schematic diagram of the sensory device according to an embodiment of this application. As shown in Figure 10, the perception device may include a transceiver 1000, a processor 1010, and memory 1020. The transceiver 1000 is configured to send and receive data under the control of the processor 1010.

[0143] In Figure 10, the bus architecture can include any number of interconnected buses and bridges, specifically, various circuits interconnecting one or more processors represented by processor 1010 and memory represented by memory 1020. The bus architecture can also interconnect various other circuits, such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and will not be described further herein. The bus interface provides an interface. The transceiver 1000 consists of multiple components, namely a transmitter and a receiver, and provides a unit for communicating with various other devices via a transmission medium such as a wireless channel, a wired channel, or an optical cable. Processor 1010 is responsible for managing the bus architecture and general processing, and memory 1020 can store data used by processor 1010 when performing operations.

[0144] 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 employ a multi-core architecture.

[0145] The processor 1010 performs the following operations by calling a computer program stored in memory: an operation to transmit a perceptual reference signal to the synesthetically active environment, wherein the common factor of the perceptual reference signal is greater than a set value, and the OFDM symbol in the perceptual reference signal contains a first number (N S The time-domain sample points of ) are included, and the cyclic prefix in the perceptual reference signal contains a second number (N CP An operation that includes time-domain sample points of ), an operation that detects a synesthetic environment and acquires a perceptual echo signal, wherein the perceptual echo signal is a signal reflected by a perceptual target in the synesthetic environment as a perceptual reference signal, and an operation that performs radio frequency preprocessing on the perceptual echo signal to acquire a first baseband signal, and the first N in the first baseband signal S / 2 and the last N CP The process involves deleting time-domain sample points to obtain a second baseband signal, and then, based on the second baseband signal, identifying the distance between the perceptual target and the perceptual device in the synesthetic environment.

[0146] In one possible implementation, the processor 1010 generates a perceptual reference signal by performing the following steps: obtaining a set conformance for the perceptual reference signal, wherein the conformance is greater than a set value; generating a frequency-domain reference sequence based on the spectral range used by the perceptual device, and mapping the frequency-domain reference sequence to the frequency-domain reference signal based on the conformance; generating a time-domain baseband signal based on 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 is N S It contains time-domain sample points and has a cyclic prefix of N CP The process involves a step that includes a time-domain sample point, and a step that upmixes the time-domain baseband signal with a cyclic prefix added to obtain a perceptual reference signal.

[0147] In one possible implementation, the processor 1010 performs the step of generating a time-domain baseband signal based on a frequency-domain reference signal, which specifically involves increasing the power of the frequency-domain reference signal based on the compression factor to obtain a tuned frequency-domain reference signal, and then performing an IFFT transform on the tuned frequency-domain reference signal to obtain a time-domain baseband signal.

[0148] In one possible implementation, the processor 1010 performs the step of identifying the distance between a perceptual target and a perceptual device in a synesthetic environment based on a second baseband signal, which specifically involves performing channel estimation on the second baseband signal to obtain a target channel estimation result, and then identifying the distance between the perceptual target and the perceptual device based on the target channel estimation result.

[0149] In one possible implementation, the processor 1010 performs the step of performing channel estimation on a second baseband signal and obtaining a target channel estimation result, specifically, N S The process involves determining the FFT length based on / 2, performing an FFT transform on the second baseband signal based on the FFT length to obtain the frequency-domain received signal, performing frequency-domain channel estimation on the frequency-domain received signal to obtain the intermediate channel estimation result, and performing time-delay domain channel estimation on the intermediate channel estimation result to obtain the target channel estimation result.

[0150] In one possible implementation, the perceptual reference signal is generated based on a frequency-domain reference signal, the frequency-domain reference signal includes multiple frequency-domain sample points, and the processor 1010 performs the step of performing frequency-domain channel estimation on the frequency-domain received signal to obtain an intermediate channel estimation result, which specifically involves determining a target frequency-domain sample point carrying the reference signal from multiple frequency-domain sample points in the frequency-domain reference signal, and performing frequency-domain channel estimation on the frequency-domain received signal to obtain an intermediate channel estimation result based on the conjugate of the sampling value of the target frequency-domain sample point in the frequency-domain reference signal.

[0151] In one possible implementation, the processor 1010 performs the step of performing time-delayed region channel estimation on the intermediate channel estimation result to obtain the target channel estimation result, which specifically involves performing an IFFT transform on the intermediate channel estimation result based on the FFT length to obtain the target channel estimation result.

[0152] In one possible implementation, the target channel estimation result includes multiple time-domain sample points, and the processor 1010 performs the step of identifying the distance between the perceived target and the perceived device based on the target channel estimation result, which specifically involves determining the target time-domain sample points belonging to the perceived target from the multiple time-domain sample points of the target channel estimation result, determining the time delay of the perceived target based on the order in which the target time-domain sample points are arranged in the target channel estimation result, and determining the distance between the perceived target and the perceived device based on the time delay of the perceived target.

[0153] In one possible implementation, the processor 1010 performs the step of determining the time delay of the perceived target based on the order in which the target time-domain sample points are arranged in the target channel estimation result, which specifically involves obtaining the subcarrier spacing (SCS) between multiple subcarriers within the bandwidth occupied by the perceived reference signal, and the SCS and N S Based on this, the intermediate frequency sampling interval is determined, and the time delay of the perceived target is determined based on the product of the intermediate frequency sampling interval and the ranking.

[0154] In one possible implementation, the processor 1010 performs the step of determining the distance between the perceptual target and the perceptual device based on the time delay of the perceptual target, which specifically means determining the distance between the perceptual target and the perceptual device based on the product of the speed of light and the time delay.

[0155] Furthermore, the perceptual device according to the embodiment of this application can realize all the steps of the method embodiment shown in Figures 2 to 5 above, and can achieve the same technical effects. In this embodiment, parts that are the same as those in the method embodiment and beneficial effects will not be described in detail here.

[0156] Corresponding to the perceptual target identification method provided in the embodiments of Figures 2 to 5 above, this application further provides a perceptual target identification device. Since the perceptual target identification device provided in the embodiments of this application corresponds to the perceptual target identification method provided in the embodiments of Figures 2 to 5 above, embodiments of the perceptual target identification method are also applicable to the perceptual target identification device provided in the embodiments of this application and will not be described in detail in the embodiments of this application.

[0157] To realize the above embodiment, this application further provides a device for identifying a perceptual target. Figure 11 is a schematic diagram of a sensory target identification device according to an embodiment of this application. As shown in Figure 11, the perceptual target identification device 1100 is applicable to the perceptual device and includes a transmitting unit 1110, a detection unit 1120, a processing unit 1130, and an identification unit 1140.

[0158] The transmitting unit 1110 is configured to transmit a perceptual reference signal to the synesthetically active environment, and when the conformance of the perceptual reference signal is greater than a set value, the OFDM symbols in the perceptual reference signal contain a first number (N S The time-domain sample points of ) are included, and the cyclic prefix in the perceptual reference signal contains a second number (N CP This includes time-domain sample points.

[0159] The detection unit 1120 is configured to detect the synesthetic environment and acquire a perceptual echo signal, which is the signal in which the perceptual reference signal is reflected by the perceptual target in the synesthetic environment.

[0160] The processing unit 1130 performs radio frequency preprocessing on the perceptual echo signal to obtain a first baseband signal, and the first N in the first baseband signal S / 2 and the last N CP The system is configured to remove the time-domain sample points to obtain a second baseband signal.

[0161] The identification unit 1140 is configured to identify the distance between a perceptual target and a perceptual device in a synesthetic environment based on a second baseband signal.

[0162] In one possible implementation, the perceptual reference signal is generated by an acquisition unit, a first generation unit, a first generation unit, and a mixing unit. The acquisition unit is configured to acquire a set conformance factor for a perceptual reference signal, and if the conformance factor is greater than the set value, The first generation unit is configured to generate a frequency-domain reference sequence based on the spectral range used by the perceptual device, and to map the frequency-domain reference sequence to a frequency-domain reference signal based on the conformance. The second generation unit is configured to generate a time-domain baseband signal based on a frequency-domain reference signal and to add a cyclic prefix to the time-domain baseband signal, with N added to the OFDM symbols in the time-domain baseband signal. S It contains time-domain sample points and has a cyclic prefix of N CP This includes a time-domain sample point, The mixing unit is configured to upmix a time-domain baseband signal to which a cyclic prefix has been added in order to obtain a perceptual reference signal.

[0163] In one possible implementation, the second generation unit is configured to specifically increase the power of the frequency-domain reference signal based on the compliance factor to obtain a tuned frequency-domain reference signal, and then perform an IFFT transform on the tuned frequency-domain reference signal to obtain a time-domain baseband signal.

[0164] In one possible implementation, the identification unit 1140 is configured to perform channel estimation on a second baseband signal to obtain a target channel estimation result, and to identify the distance between a perceived target and a perceived device based on the target channel estimation result.

[0165] In one possible implementation, the identification unit 1140 is, specifically, N S The system is configured to determine the FFT length based on / 2, perform an FFT transformation on the second baseband signal based on the FFT length to obtain the frequency-domain received signal, perform frequency-domain channel estimation on the frequency-domain received signal to obtain the intermediate channel estimation result, and perform time-delay domain channel estimation on the intermediate channel estimation result to obtain the target channel estimation result.

[0166] In one possible implementation, a perceptual reference signal is generated based on a frequency-domain reference signal, the frequency-domain reference signal includes multiple frequency-domain sample points, and the identification unit 1140 is configured to determine a target frequency-domain sample point carrying the reference signal from the multiple frequency-domain sample points in the frequency-domain reference signal, and to 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.

[0167] In one possible implementation, the identification unit 1140 is specifically configured to perform an IFFT transformation on the intermediate channel estimation result based on the FFT length to obtain the target channel estimation result.

[0168] In one possible implementation, the target channel estimation result includes multiple time-domain sample points, and the identification unit 1140 is configured to specifically determine the target time-domain sample points belonging to the perceptual target from the multiple time-domain sample points of the target channel estimation result, determine the time delay of the perceptual target based on the order in which the target time-domain sample points are arranged in the target channel estimation result, and determine the distance between the perceptual target and the perceptual device based on the time delay of the perceptual target.

[0169] In one possible implementation, the identification unit 1140 specifically obtains the subcarrier spacing (SCS) between multiple subcarriers within the bandwidth occupied by the perceptual reference signal, and the SCS and N S Based on this, the intermediate frequency sampling interval is determined, and the time delay of the perceived target is determined based on the product of the intermediate frequency sampling interval and the ranking.

[0170] In one possible implementation, the identification unit 1140 is specifically configured to determine the distance between the perceived target and the perceived device based on the product of the speed of light and the time delay.

[0171] Furthermore, the perceptual target identification device provided in the embodiment of this application can implement all the steps of the method embodiment shown in Figures 2 to 5 above, and can achieve similar technical effects. In this embodiment, parts identical to those of the method embodiment and beneficial effects will not be described in detail here.

[0172] It should be noted that the unit division in the embodiments of this application is schematic and merely a logical functional division. In actual implementation, other division methods may be used. Furthermore, each functional unit in each embodiment of this application may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated unit may be implemented in hardware form or in the form of a software functional unit.

[0173] When the integrated unit is implemented as 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 proposal of this application, or any part of it that contributes to the prior art, or all or part of the technical proposal, can be implemented in the form of a software product. This computer software product is stored in a storage medium and includes a number of instructions for causing a computer device (such as a personal computer, server, or network-side device) or processor to perform all or part of the steps of the method of each embodiment of this application. The storage medium includes various media capable of storing program code, such as USB flash drives, mobile hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, and optical disks.

[0174] In another embodiment, the embodiments of the present application further provide a processor-readable storage medium in which a computer program is stored, and the computer program is used to cause a processor to perform the method shown in any one embodiment of Figures 2 to 5 of the present application.

[0175] The above-mentioned processor-readable storage medium is any available medium or data storage that the processor can access, and includes, but is not limited to, magnetic memory (e.g., floppy disks, hard disks, tapes, magneto-optical disks (MO), etc.), optical memory (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor memory (e.g., ROMs, EPROMs, EEPROMs, non-volatile memory (NAND flash), solid-state drives (SSDs)), etc.

[0176] To realize the above embodiment, this application further provides a computer program product. The computer program product includes a computer program, and when the computer program is executed by a processor, the method shown in any one embodiment of Figures 2 to 5 of this application is realized.

[0177] Those skilled in the art will understand that embodiments of this application may be provided as methods, systems, or computer program products. Accordingly, this application may take the form of entirely hardware-only embodiments, entirely software-only embodiments, or embodiments combining software and hardware. Furthermore, this application may take the form of a computer program product implemented on one or more computer-readable storage media (including, but not limited to, magnetic disk memory and optical memory) containing computer-readable program code.

[0178] This application will be described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products relating to embodiments of this application. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be realized by computer executable instructions. These computer executable instructions can be provided to a processor of a general-purpose computer, a dedicated computer, an embedded processor, or other programmable data processing device to generate a machine. Thus, instructions executed by the processor of a computer or other programmable data processing device generate a device for performing one or more processes in the flowchart and / or one or more blocks in the block diagram.

[0179] These processor-executable instructions can be stored in processor-readable memory, which can instruct a computer or other programmable data processing device to operate in a specific manner. As a result, the instructions stored in processor-readable memory generate a product that includes an instruction unit that implements the functions specified in one or more processes in a flowchart and / or one or more blocks in a block diagram.

[0180] These processor-executable instructions are loadable 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 generate a process realized by the computer, and the instructions executed on the computer or other programmable device provide steps to realize one or more processes in a flowchart and / or one or more blocks in a block diagram.

[0181] Obviously, those skilled in the art can make various changes and modifications to this application without departing from the spirit and scope of this application. Therefore, if these changes and modifications of this application are included within the scope of the claims of this application and the scope of their equivalents, this application shall be deemed to include these changes and modifications.

Description of Reference Numerals

[0182] 1000 Transceiver 1010 Processor 1020 Memory 1100 Identification Device 1110 Transmission Unit 1120 Detection Unit 1130 Processing Unit 1140 Identification Unit

Claims

1. A method for identifying a perceptual target applied to a perceptual device, A step of transmitting a perceptual reference signal to a synesthetistic environment, wherein the conformance of the perceptual reference signal is greater than a set value, and the OFDM symbols in the perceptual reference signal contain a first number (N Ｓ The time-domain sample points of the ) are included, and the cyclic prefix in the perceptual reference signal contains a second number (N ＣＰ The step includes a time-domain sample point of the following: A step of detecting the synesthetic environment and acquiring a perceptual echo signal, wherein the perceptual echo signal is a signal in which the perceptual reference signal is reflected by a perceptual target in the synesthetic environment. Radio frequency preprocessing is performed on the aforementioned perceptual echo signal to obtain a first baseband signal, and the first N in the first baseband signal Ｓ / 2 and the last N ＣＰ The steps include: deleting the time-domain sample points to obtain a second baseband signal, The process includes the step of identifying the distance between a perceptual target in the synesthetic environment and the perceptual device based on the second baseband signal, A method for identifying a perceptual target, characterized by the features described above.

2. The aforementioned perceptual reference signal is A step of obtaining a conformance set for the aforementioned perceptual reference signal, comprising the step of the conformance being greater than a set value, The steps include generating a frequency-domain reference sequence based on the spectral range used by the perceptual device, and mapping the frequency-domain reference sequence to a frequency-domain reference signal based on the conformance. A step of generating a time-domain baseband signal based on 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 is N Ｓ The time-domain sample points include N of the cyclic prefix. ＣＰ A step that includes a time-domain sample point, The steps include: upmixing a time-domain baseband signal to which a cyclic prefix has been added to obtain the perceived reference signal, and generating using the above. The method for identifying a perceptual target according to feature 1.

3. The step of generating a time-domain baseband signal based on the frequency-domain reference signal is: The steps include increasing the power of the frequency domain reference signal based on the aforementioned conformance factor to obtain a tuned frequency domain reference signal, The steps include performing an IFFT transform on the adjusted frequency domain reference signal to obtain the time domain baseband signal, The method for identifying a perceptual target according to feature 2.

4. The step of identifying the distance between the perceptual target in the synesthetic environment and the perceptual device based on the second baseband signal is: The steps include performing channel estimation on the second baseband signal and obtaining a target channel estimation result, The process includes identifying the distance between the perceived target and the perceived device based on the target channel estimation result. A method for identifying a perceptual target according to any one of claims 1 to 3.

5. The step of performing channel estimation on the second baseband signal and obtaining the target channel estimation result is: The aforementioned N Ｓ Based on / 2, the step of determining the FFT length, The steps include: performing an FFT conversion on the second baseband signal based on the FFT length to obtain a frequency domain received signal; The steps include: performing frequency domain channel estimation on the frequency domain received signal and obtaining the intermediate channel estimation result; The step includes performing time-delayed region channel estimation on the intermediate channel estimation result to obtain the target channel estimation result, The method for identifying a perceptual target according to feature 4.

6. The aforementioned perceptual reference signal is generated based on a frequency-domain reference signal, the frequency-domain reference signal includes a plurality of frequency-domain sample points, The step of performing frequency-domain channel estimation on the frequency-domain received signal and obtaining the intermediate channel estimation result is: The steps include determining a target frequency domain sample point that carries the reference signal from the plurality of frequency domain sample points in the frequency domain reference signal, The process includes the step of performing 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, and obtaining an intermediate channel estimation result. The method for identifying a perceptual target according to feature 5.

7. The step of performing time-delayed region channel estimation on the intermediate channel estimation result to obtain the target channel estimation result is: The process includes the step of performing an IFFT transformation on the intermediate channel estimation result based on the FFT length to obtain the target channel estimation result. A method for identifying a perceptual target according to claim 5 or 6.

8. The target channel estimation result includes multiple time-domain sample points, The step of identifying the distance between the perceptual target and the perceptual device based on the target channel estimation result is: The steps include determining a target time-domain sample point belonging to the perceptual target from a plurality of time-domain sample points of the target channel estimation results, The steps include determining the time delay of the perceived target based on the order in which the target time domain sample points are arranged in the target channel estimation result, The steps include determining the distance between the perceptual target and the perceptual device based on the time delay of the perceptual target, A method for identifying a perceptual target according to any one of claims 4 to 7.

9. The step of determining the time delay of the perceived target based on the order in which the target time domain sample points are arranged in the target channel estimation result is: The steps include obtaining the subcarrier spacing (SCS) between multiple subcarriers within the bandwidth occupied by the aforementioned perceptual reference signal, The SCS and the N Ｓ Based on this, the steps include determining the intermediate frequency sampling interval, The step includes determining the time delay of the perceived target based on the product of the intermediate frequency sampling interval and the order of arrangement, The method for identifying a perceptual target according to feature 8.

10. The step of determining the distance between the perceptual target and the perceptual device based on the time delay of the perceptual target is: The step of determining the distance between the perceptual target and the perceptual device based on the product of the speed of light and the time delay, A method for identifying a perceptual target according to claim 8 or 9, characterized by the features described above.

11. It is a perceptual device, Includes memory, transceivers, and processor, Memory is used to store computer programs, transceivers are used to send and receive data under the control of the processor, and the processor reads computer programs from the memory, An operation of transmitting a perceptual reference signal to a synesthetic environment, wherein a com factor of the perceptual reference signal is greater than a set value, and a first number (N Ｓ ) of time-domain sample points are included in an OFDM symbol in the perceptual reference signal, and a second number (N ＣＰ ) of time-domain sample points are included in a cyclic prefix in the perceptual reference signal, and An operation to detect the synesthetic environment and acquire a perceptual echo signal, wherein the perceptual echo signal is a signal reflected by a perceptual target in the synesthetic environment, Radio frequency preprocessing is performed on the aforementioned perceptual echo signal to obtain a first baseband signal, and the first N in the first baseband signal Ｓ / 2 and the last N ＣＰ The operation involves deleting individual time-domain sample points to obtain a second baseband signal, Based on the second baseband signal, the system performs the operation of identifying the distance between the perceptual target in the synesthetistic environment and the perceptual device. A perceptual device characterized by the following features.

12. The aforementioned processor, A step of obtaining a conformance set for the aforementioned perceptual reference signal, comprising the step of the conformance being greater than a set value, The steps include generating a frequency-domain reference sequence based on the spectral range used by the perceptual device, and mapping the frequency-domain reference sequence to a frequency-domain reference signal based on the conformance. A step of generating a time-domain baseband signal based on 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 is N Ｓ The time-domain sample points include N of the cyclic prefix. ＣＰ A step that includes a time-domain sample point, A perceptual reference signal is generated by performing the steps of: upmixing a time-domain baseband signal to which a cyclic prefix has been added to obtain the perceptual reference signal; The perceptual device according to feature 11.

13. The process by which the processor generates a time-domain baseband signal based on the frequency-domain reference signal specifically means: Based on the aforementioned conformance factor, the power of the frequency domain reference signal is increased to obtain the adjusted frequency domain reference signal. The process involves performing an IFFT transformation on the adjusted frequency-domain reference signal to obtain the time-domain baseband signal. The perceptual device according to feature 12.

14. The processor performs the step of identifying the distance between the perceptual target and the perceptual device in the synesthetic environment based on the second baseband signal, specifically, Channel estimation is performed on the second baseband signal to obtain the target channel estimation result. Based on the target channel estimation result, the distance between the perceived target and the perceived device is identified. A perceptual device according to any one of claims 11 to 13.

15. The process by which the processor performs channel estimation on the second baseband signal and obtains the target channel estimation result specifically involves: The aforementioned N Ｓ Based on / 2, the FFT length is determined, Based on the FFT length, an FFT transformation is performed on the second baseband signal to obtain a frequency domain received signal. Frequency domain channel estimation is performed on the frequency domain received signal to obtain the intermediate channel estimation result. This involves performing time-delayed region channel estimation on the intermediate channel estimation result to obtain the target channel estimation result. The perceptual device according to feature 14.

16. The aforementioned perceptual reference signal is generated based on a frequency-domain reference signal, the frequency-domain reference signal includes a plurality of frequency-domain sample points, The process by which the processor performs frequency-domain channel estimation on the frequency-domain received signal and obtains the intermediate channel estimation result specifically involves: From the plurality of frequency-domain sample points in the frequency-domain reference signal, a target frequency-domain sample point carrying the reference signal is determined. This involves performing 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, and obtaining the intermediate channel estimation result. The perceptual device according to claim 15.

17. The process by which the processor performs time-delayed region channel estimation on the intermediate channel estimation result to obtain the target channel estimation result specifically involves: Based on the FFT length, an IFFT transformation is performed on the intermediate channel estimation result to obtain the target channel estimation result. The sensory device according to feature 15 or 16.

18. The target channel estimation result includes multiple time-domain sample points, The process by which the processor identifies the distance between the perceived target and the perceived device based on the target channel estimation result specifically includes: From the multiple time-domain sample points of the target channel estimation results, a target time-domain sample point belonging to the perceptual target is determined. Based on the order in which the target time-domain sample points are arranged in the target channel estimation result, the time delay of the perceived target is determined. The distance between the perceptual target and the perceptual device is determined based on the time delay of the perceptual target. A perceptual device according to any one of claims 14 to 17.

19. The process by which the processor determines the time delay of the perceived target based on the order in which the target time-domain sample points are arranged in the target channel estimation result specifically means: The subcarrier spacing (SCS) between multiple subcarriers within the bandwidth occupied by the aforementioned perceptual reference signal is obtained. The SCS and the N Ｓ Based on this, the intermediate frequency sampling interval is determined, The time delay of the perceived target is determined based on the product of the intermediate frequency sampling interval and the order in which they are arranged. The perceptual device according to claim 18.

20. The process by which the processor determines the distance between the perceptual target and the perceptual device based on the time delay of the perceptual target specifically means: The distance between the perceptual target and the perceptual device is determined based on the product of the speed of light and the time delay. The sensing device according to claim 18 or 19.

21. A perceptual target identification device applied to a perceptual device, A transmitting unit configured to transmit a perceptual reference signal to a synesthetically controlled environment, wherein the compliance of the perceptual reference signal is greater than a set value, and the OFDM symbols in the perceptual reference signal contain a first number (N Ｓ The time-domain sample points of the ) are included, and the cyclic prefix in the perceptual reference signal contains a second number (N ＣＰ A transmission unit that includes time-domain sample points of ) A detection unit configured to detect the synesthetic environment and acquire a perceptual echo signal, wherein the perceptual echo signal is a signal reflected by a perceptual target in the synesthetic environment. Radio frequency preprocessing is performed on the aforementioned perceptual echo signal to obtain a first baseband signal, and the first N in the first baseband signal Ｓ / 2 and the last N ＣＰ A processing unit configured to remove individual time-domain sample points to obtain a second baseband signal, The system includes an identification unit configured to identify the distance between a perceptual target in the synesthetic environment and the perceptual device based on the second baseband signal, A perceptual target identification device characterized by the following features.

22. A processor-readable storage medium on which a computer program is stored, The computer program is used to cause a processor to perform the method for identifying a perceptual target according to any one of claims 1 to 10. A processor-readable storage medium characterized by the following features.

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