Method and apparatus for determining communication and sensing detection result, and storage medium

Abstract

Embodiments of the present disclosure relate to the field of communications, and provide a method and apparatus for determining a communication and sensing detection result, a communication device, and a storage medium. The method comprises: determining, within at least one operation cycle, an uplink channel estimation result in an uplink stage and a communication and sensing frequency domain sending signal and a communication and sensing frequency domain receiving signal in a downlink stage; and on the basis of the uplink channel estimation result, the communication and sensing frequency domain sending signal and the communication and sensing frequency domain receiving signal within the at least one operation cycle, determining a communication and sensing detection result, wherein one operation cycle comprises the uplink stage and the downlink stage, the communication and sensing frequency domain receiving signal is determined by demodulating an echo signal, the echo signal is a signal obtained after an integration signal sent by a network device in the downlink stage is reflected by a terminal, and the integration signal is determined by modulating the communication and sensing frequency domain sending signal. According to the embodiments of the present disclosure, the inherent radar multipath interference of a terminal can be effectively eliminated.

Description

Method, device and storage medium for determining synaesthesia detection results Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a method, apparatus, communication device, and computer-readable storage medium for determining synaesthesia detection results. Background Art

[0002] With the rapid development of communication information technology, in the fields of 6G, Internet of Vehicles, UAV networking and military applications, in order to achieve the deep integration of communication and perception services, in-depth research on interawareness detection technology (also known as communication radar integration technology) is needed.

[0003] The multipath effect, which is prevalent in various wireless communication scenarios, inevitably causes multipath interference in the detection results, resulting in more false targets in the synaesthesia detection and increasing the difficulty of radar detection.

[0004] Related technologies, such as radar clutter processing solutions and false target elimination solutions, are unable to effectively eliminate the inherent radar multipath interference of environmental targets. This problem has hindered the development and promotion of synaesthesia detection technology.

[0005] Summary of the Invention

[0006] The present disclosure provides a method, device communication, and computer-readable storage medium for determining synaesthesia detection results, which can solve the above-mentioned problems of the prior art. The technical solution is as follows:

[0007] According to one aspect of an embodiment of the present disclosure, a method for determining a synaesthesia detection result is provided, the method comprising:

[0008] Determine an uplink channel estimation result in an uplink phase and a synaesthesia frequency domain transmission signal and a synaesthesia frequency domain reception signal in a downlink phase in at least one operation cycle;

[0009] Determining a synaesthesia detection result based on an uplink channel estimation result, a synaesthesia frequency domain transmission signal, and a synaesthesia frequency domain reception signal of at least one operation cycle;

[0010] Among them, an operation cycle includes an up phase and a down phase;

[0011] The synaesthesia frequency domain received signal is determined by demodulating an echo signal, where the echo signal is a signal reflected by a terminal from an integrated signal sent by the network device in a downlink phase;

[0012] The integrated signal is determined by modulating the synaesthesia frequency domain transmission signal.

[0013] According to another aspect of an embodiment of the present disclosure, a device for determining a synaesthesia detection result is provided, the device comprising:

[0014] a processing module, configured to determine an uplink channel estimation result in an uplink phase and a synaesthesia frequency domain transmission signal and a synaesthesia frequency domain reception signal in a downlink phase in at least one operation cycle;

[0015] The processing module is further configured to determine a synaesthesia detection result based on an uplink channel estimation result, a synaesthesia frequency domain transmission signal, and a synaesthesia frequency domain reception signal of at least one operation cycle;

[0016] Among them, an operation cycle includes an up phase and a down phase;

[0017] The synaesthesia frequency domain received signal is determined by demodulating the echo signal, wherein the echo signal is a signal reflected by the terminal from the integrated signal sent by the device in the downlink phase;

[0018] The integrated signal is determined by modulating the synaesthesia frequency domain transmission signal.

[0019] According to another aspect of an embodiment of the present disclosure, a communication device is provided. The communication device includes a memory, a processor, and a computer program stored in the memory. The processor executes the computer program to implement the method for determining synaesthesia detection results provided in the above aspect.

[0020] According to another aspect of the embodiments of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the method for determining the synaesthesia detection result provided in the above aspect is implemented.

[0021] The technical solutions provided by the embodiments of the present disclosure have the following beneficial effects:

[0022] By analyzing the generation logic and transmission process of the echo signal, it is determined that further processing the echo signal in combination with the propagation channel estimation on the basis of the existing integrated signal can effectively eliminate the inherent radar multipath interference of the environmental target. In order to obtain the channel estimation of one-way propagation, the embodiment of the present disclosure subdivides each operating cycle into two stages, uplink and downlink, and obtains the channel estimation of each operating cycle by receiving the uplink signal in the uplink stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for describing the embodiments of the present disclosure.

[0024] FIG1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present disclosure;

[0025] FIG2 a is a flow chart of a method for determining synaesthesia detection results provided by an embodiment of the present disclosure;

[0026] FIG2 b is a schematic diagram of an operation cycle provided by an embodiment of the present disclosure;

[0027] FIG2c is a schematic diagram of a process of sending an integrated signal, receiving an echo, and performing radar processing through a transmitting end (Tx) of a network device according to an embodiment of the present disclosure;

[0028] FIG3a is a schematic diagram of a radar image obtained by a method for determining synaesthesia detection results provided by the related art;

[0029] FIG3 b is a schematic diagram of a radar image obtained by a method for determining synaesthesia detection results provided by an embodiment of the present disclosure;

[0030] FIG4 is a schematic structural diagram of an apparatus for determining synaesthesia detection results provided by an embodiment of the present disclosure;

[0031] FIG5 is a schematic structural diagram of a communication device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0032] The following describes embodiments of the present disclosure in conjunction with the accompanying drawings. It should be understood that the embodiments described below in conjunction with the accompanying drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present disclosure and do not constitute a limitation on the technical solutions of the embodiments of the present disclosure.

[0033] Those skilled in the art will understand that, unless otherwise stated, the singular forms "a", "an" and "the" used herein may also include plural forms. It should be further understood that the terms "including" and "comprising" used in the embodiments of the present disclosure mean that the corresponding features can be implemented as the presented features, information, data, steps, operations, elements and / or components, but do not exclude implementation as other features, information, data, steps, operations, elements, components and / or combinations thereof supported by the present technical field. It should be understood that when we say that an element is "connected" or "coupled" to another element, the element can be directly connected or coupled to the other element, or it can refer to the element and the other element establishing a connection relationship through an intermediate element. In addition, the "connection" or "coupling" used here can include wireless connection or wireless coupling. The term "and / or" used here indicates at least one of the items defined by the term, for example, "A and / or B" can be implemented as "A", or as "B", or as "A and B".

[0034] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0035] First, several terms involved in this disclosure are introduced and explained:

[0036] A channel is the transmission medium for signals and can be categorized as either wired or wireless. Wired channels include open wires, symmetrical cables, coaxial cables, and optical cables; wireless channels include ground wave propagation, shortwave ionospheric reflections, ultrashortwave or microwave line-of-sight relays, satellite relays, and various scattering channels. When signals propagate in a wireless channel, the received signal is not derived solely from a single direct path but also from reflections, diffractions, and data signals arriving along different paths. This phenomenon is called multipath propagation, and the channel is called a multipath channel.

[0037] Orthogonal Frequency Division Multiplexing (OFDM) technology uses frequency division multiplexing to achieve parallel transmission of high-speed serial data. It has good resistance to multipath fading and can support multi-user access.

[0038] The cyclic prefix (CP) is formed by copying the signal at the end of an OFDM symbol to the beginning. There are two main CP lengths: normal CP and extended CP. The CP can be correlated with other multipath component information to obtain complete information. It also enables time estimation and frequency synchronization.

[0039] The Discrete Fourier Transform (DFT) is a discrete Fourier transform in both the time and frequency domains, transforming the time-domain samples of a signal into the frequency-domain samples of its DTFT. Formally, the sequences at both ends of the transform (in the time and frequency domains) are finite in length, but in reality, both sequences should be considered as sequences of principal values ​​of discrete periodic signals. Even when performing the DFT on a finite-length discrete signal, it should be considered as a transform of its periodic extension. In practical applications, the Fast Fourier Transform (FFT) is often used to calculate the DFT.

[0040] The method for determining synaesthesia detection results, device communication, and computer-readable storage medium provided in the present disclosure are intended to solve the above technical problems in the prior art.

[0041] The following describes several exemplary embodiments to illustrate the technical solutions of the embodiments of the present disclosure and the technical effects produced by the technical solutions of the present disclosure. It should be noted that the following embodiments can refer to, draw on, or combine with each other, and the same terms, similar features, and similar implementation steps in different embodiments will not be repeated.

[0042] FIG1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present disclosure. The communication system 100 includes a terminal 101 and a network device 102 .

[0043] In some embodiments, the terminal 101 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited thereto.

[0044] In some embodiments, network device 102 may include an access network device.

[0045] In some embodiments, the access network device is, for example, a node or device that accesses a terminal to a wireless network, and may include an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved nodeB (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a wireless fidelity (WiFi) system, but is not limited thereto.

[0046] In some embodiments, the technical solutions of the embodiments of the present disclosure may be applicable to the Open RAN architecture. In this case, the interfaces between or within the network devices involved in the embodiments of the present disclosure may become internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces may be implemented through software or programs.

[0047] In some embodiments, the access network device can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the network device, with the functions of some protocol layers centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

[0048] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

[0049] The following embodiments of the present disclosure may be applied to the communication system 100 shown in Figure 1, or a portion thereof, but are not limited thereto. The entities shown in Figure 1 are illustrative only. The communication system may include all or part of the entities shown in Figure 1, or may include other entities outside of Figure 1. The number and form of the entities may be arbitrary. The connection relationship between the entities is illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0050] The embodiments of the present disclosure may be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new radio access technology (RAT), new radio (NR), new radio access (NX), future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X), systems utilizing other communication methods, and next-generation systems based on and extending these methods. Furthermore, multiple systems may be combined (for example, a combination of LTE or LTE-A with 5G).

[0051] In an embodiment of the present application, a method for determining a synaesthesia detection result is provided, which is applied to a network device. As shown in FIG2a , the method includes:

[0052] S201: Determine an uplink channel estimation result in an uplink phase and a synaesthesia frequency domain transmission signal and a synaesthesia frequency domain reception signal in a downlink phase in at least one operation cycle.

[0053] In some embodiments, the number of operation cycles is the number of radar processing estimation symbols N f .

[0054] Each operating cycle of the embodiment of the present disclosure is further divided into an uplink phase and a downlink phase. In the uplink phase, the terminal sends an uplink signal containing a training sequence or pilot to the network device. In the downlink phase, the network device sends a downlink communication radar integrated signal (also referred to as an integrated signal) to the terminal and receives the echo signal reflected by the integrated signal from the terminal.

[0055] In some embodiments, the duration of the uplink phase and the downlink phase in each operation cycle are the same.

[0056] In some embodiments, the total number of OFDM subcarriers is N, the basic symbol period is T, and the cyclic prefix period is T. CP , the symbol periods are T sym , and T sym =T+T CP , cyclic prefix length N CP =NT CP / T, the subcarrier spacing is Δf=1 / T.

[0057] Please refer to FIG2b, which exemplarily shows a schematic diagram of the operation cycle provided by the embodiment of the present disclosure. As shown in the figure, the duration of the uplink phase and the downlink phase of the embodiment of the present disclosure is T sym In the uplink phase, the terminal sends an uplink signal containing a training sequence or pilot to the network device, and the network device performs uplink channel estimation and communication reception. In the downlink phase, the network device sends an integrated signal to the terminal, receives the echo signal and performs radar processing.

[0058] In one embodiment, the uplink signal sent by the terminal is an OFDM symbol including a pilot or training, so that the network device performs uplink channel estimation using an existing channel estimation method.

[0059] In some embodiments, the uplink channel estimation result obtained by the network device is a time-domain response of a one-way propagation channel in a corresponding uplink phase.

[0060] In one embodiment, the one-way propagation channel is a Rician channel.

[0061] It should be understood that one-way transmission refers to the signal propagating from a first communication device to a second communication device, while two-way transmission refers to the signal propagating from a first communication device to a second communication device and then back to the first communication device. It should be understood that when the first communication device refers to a terminal, the second communication device refers to a network device, and when the first communication device refers to a network device, the second communication device refers to a terminal. Accordingly, one-way transmission in the uplink phase refers to the signal propagating from a terminal to a network device.

[0062] It should be noted that, for the convenience of derivation and understanding, the embodiments of the present disclosure perform an ideal estimation of the uplink channel.

[0063] The network device of the embodiment of the present disclosure sends a downlink integrated signal to the terminal and receives an echo signal in each downlink phase.

[0064] Please refer to FIG. 2c, which is a schematic diagram of a process of sending an integrated signal, receiving an echo signal, and performing radar processing through a transmitting end (Tx) of a network device according to an embodiment of the present disclosure. As shown in the figure, for the μth operating cycle, the process includes:

[0065] The binary data is converted into RadCom frequency domain symbols (also known as RadCom frequency domain symbols) through Quadrature Amplitude Modulation (QAM) or Phase Amplitude Modulation (PAM). Understandably, X μ [k] is the transmitted frequency domain symbol of the k-th subcarrier in the μ-th operating cycle;

[0066] The synaesthesia frequency domain symbol is subjected to serial / parallel conversion (S / P) to obtain the first synaesthesia frequency domain symbol vector (i.e., the synaesthesia frequency domain transmission signal) X μ =[X μ [0],X μ [1],…,X μ [N-1]] T , where the superscript T represents the transposed budget;

[0067] One synaesthesia frequency domain transmission signal is used to obtain synaesthesia detection results, and the other synaesthesia frequency domain transmission signal is mapped to the time domain through the inverse discrete Fourier transform (IDFT). It can be understood that the corresponding synaesthesia time domain symbol vector is x=IDFT(X), where IDFT stands for IDFT operation.

[0068] The μth synaesthesia time domain transmission signal of the synaesthesia time domain symbol vector (also called the time domain sampling of the μth downlink OFDM symbol) is expressed as:

[0069] Among them, N f is the number of operating cycles.

[0070] The signal obtained by modulating the synaesthesia time domain transmission signal is sent to the channel as an integrated signal, thereby completing the process of sending the downlink integrated signal.

[0071] In some embodiments, the modulation includes performing parallel-to-serial (P / S) conversion on the synaesthesia time-domain transmission signal, adding a cyclic prefix CP, performing digital-to-analog (D / A) conversion, and the like.

[0072] After sending the integrated signal to the terminal, the network device further receives the arriving signal (i.e., the echo signal of the integrated signal transmitted by the terminal) after passing through the channel.

[0073] The received echo signal is demodulated to obtain the second synaesthesia frequency domain symbol vector (i.e., the synaesthesia frequency domain received signal) Y μ [k] represents the frequency domain term of the received echo of the k-th subcarrier in the μ-th operating cycle;

[0074] In one embodiment, demodulation includes performing analog-to-digital conversion (A / D) on the echo signal, removing the CP, and then mapping the signal to the frequency domain through discrete Fourier transform (DFT) through S / P.

[0075] The received synaesthesia frequency domain signal is also divided into two paths, one for radar processing and the other for channel equalization to compensate for channel distortion.

[0076] In one embodiment, the equalization may use a Minimum Mean-Squared Error (MMSE) or Zero Forcing (ZF) equalizer;

[0077] The MMSE equalization coefficient is:

[0078] The ZF balance coefficient is:

[0079] in, represents the channel frequency domain response coefficient of the kth subcarrier for one-way propagation, H * [k] represents the conjugate operation on H[k], ε b and N0 are the power spectral density of the signal energy per bit and additive white Gaussian noise (AWGN), respectively;

[0080] The equalized signal can be expressed as the IDFT result of multiplying the received signal in the frequency domain by the equalization coefficient:

[0081] S202: Determine a synaesthesia detection result according to an uplink channel estimation result of at least one operation cycle, a synaesthesia frequency domain transmitted signal, and a synaesthesia frequency domain received signal.

[0082] For each operating cycle, the embodiment of the present disclosure can determine the uplink channel estimation result of the operating cycle based on the uplink signal received in the operating cycle. When the uplink stage and the downlink stage are within the coherence time, it can be considered that the channel information in the uplink stage and the downlink stage has not changed. Due to the reciprocity of the channel, the integrated signal in the uplink stage undergoes two approximately identical channel propagations in the adjacent downlink stages within the same operating cycle. Based on this, the embodiment of the present disclosure obtains a one-way uplink channel estimation result by performing uplink channel estimation on the received uplink signal, and obtains a channel estimation result of the echo signal after two-way propagation, thereby using the two-way channel estimation results and the integrated signal to process the echo signal, effectively eliminating the inherent radar multipath interference of the terminal.

[0083] The embodiment of the present disclosure analyzes the generation logic and transmission process of the echo signal, and determines that on the basis of the existing integrated signal, further processing the echo signal in combination with the propagation channel estimation can effectively eliminate the radar multipath interference inherent in the terminal. In order to obtain the propagation channel estimation, the embodiment of the present disclosure subdivides each operating cycle into two stages, uplink and downlink. By receiving the uplink signal in the uplink stage and parsing the uplink signal, the uplink channel estimation result of each operating cycle is obtained.

[0084] Based on the above embodiments, as an optional embodiment, determining the synaesthesia detection result based on the uplink channel estimation result, the synaesthesia frequency domain transmission signal, and the synaesthesia frequency domain reception signal of at least one operation cycle includes:

[0085] Determine the echo channel frequency domain response of the operation period according to the uplink channel estimation result of the operation period;

[0086] The synaesthesia detection result is determined according to the echo channel frequency domain response, the synaesthesia frequency domain transmission signal and the synaesthesia frequency domain reception signal of at least one operation cycle.

[0087] In some embodiments, the synaesthesia frequency domain transmission signal refers to the OFDM frequency domain symbol in the transmitted integrated signal.

[0088] In some embodiments, the frequency domain received signal refers to a frequency domain symbol in a received echo signal.

[0089] In some embodiments, OFDM frequency domain symbols refer to frequency domain samples of OFDM symbols.

[0090] In some embodiments, the echo channel frequency domain response is a channel frequency domain response of an echo signal after two-pass propagation.

[0091] In some embodiments, the channel frequency domain response refers to the frequency domain sampling of the channel impulse response. Similarly, the channel time domain response refers to the time domain sampling of the channel impulse response.

[0092] As can be seen from Figure 2c above, in the process of sending an integrated signal in the downlink phase of each operating cycle, the embodiment of the present disclosure will retain one synaesthesia frequency domain transmission signal. At the same time, in the process of receiving the echo signal, it will also retain one synaesthesia frequency domain reception signal, thereby determining the synaesthesia detection results of the terminal in multiple operating cycles based on the echo channel frequency domain response, synaesthesia frequency domain transmission signal and synaesthesia frequency domain reception signal of each operating cycle.

[0093] Based on the above embodiments, as an optional embodiment, the uplink channel estimation result includes a time domain response of a one-way propagation channel.

[0094] Determine the echo channel frequency domain response of the operation period based on the uplink channel estimation result of the operation period, including:

[0095] Performing a DFT operation on the channel time domain response of the one-way propagation of the operating period to obtain the channel frequency domain response of the one-way propagation of the operating period;

[0096] The echo channel frequency domain response of the operation period is determined according to the channel frequency domain response of the one-way propagation of the operation period.

[0097] It should be noted that the uplink signal of the present disclosure may include a training sequence or a pilot, so that the channel estimation is performed based on the training sequence or the pilot through the existing channel estimation method to determine the channel time domain response of the one-way propagation of the operating period. Among them, h μ [n] represents the channel time domain response coefficient of the nth channel in the μth operating cycle;

[0098] It is worth noting that since the network equipment needs to detect the terminal in the downlink phase, its signal undergoes two-way propagation. In order to ensure the radar ranging performance, the total time of the two-way propagation cannot be longer than the cyclic prefix duration of the OFDM symbol, that is, the multipath channel length N in the embodiment of the present disclosure. ch Satisfy N ch <N cp / 2, Maximum transmission delay

[0099] After obtaining the time domain response of the one-way propagation channel, the frequency domain response of the one-way propagation channel can be obtained by mapping it to the frequency domain through DFT (which can be expressed as ).

[0100] Since the echo signal propagates twice, the channel frequency domain response coefficient of the kth subcarrier of the echo channel frequency domain response can be determined according to the two one-way channel frequency domain responses of the subcarrier in the downlink phase.

[0101] In some embodiments, the echo channel frequency domain response of the operation cycle can be obtained by performing a linear convolution operation on the two channel time domain responses.

[0102] The channel frequency domain response coefficient H of the kth subcarrier in the echo channel frequency domain response of the μth operation cycle of the embodiment of the present disclosure is r,μ [k] can be expressed as: H r,μ [k] = DFT{h μ [n]*h μ [n]}=(H μ [k]) 2 , k=0,1,…,N-1

[0103] That is, determining the echo channel frequency domain response of the operating period based on the one-way propagation channel time domain response of the operating period includes:

[0104] Channel time domain response to one-way propagation of the operating cycle Perform DFT operation to obtain the channel frequency domain response H of the one-way propagation of the running period μ [k];

[0105] The frequency domain response of the channel H for one-way propagation according to the operating cycle μ [k], determines the echo channel frequency domain response H of the operating cycle r,μ [k].

[0106] In some embodiments, each synaesthesia frequency domain transmission signal includes OFDM frequency domain symbols of all subcarriers in the corresponding downlink phase. The OFDM frequency domain symbol of the kth subcarrier in the μth downlink phase can be expressed as X μ [k].

[0107] In some embodiments, each echo channel frequency domain response includes channel frequency domain response coefficients of all subcarriers in the corresponding downlink phase. The echo channel frequency domain response of the μth downlink phase can be expressed as H r,μ , accordingly, the channel frequency domain response coefficient of the kth subcarrier of the echo channel frequency domain response can be expressed as H r,μ [k].

[0108] In some embodiments, each synaesthesia frequency domain received signal includes the echo frequency domain items Y of all subcarriers in the corresponding downlink phase. μ Each echo frequency domain item includes a first sub-item related to the OFDM frequency domain symbol of the corresponding subcarrier, a second sub-item related to the channel frequency domain response coefficient of the corresponding subcarrier, and a third sub-item related to the synaesthesia detection result of the terminal.

[0109] Specifically, when the uplink and downlink cycles are within the coherence time, it can be considered that the channel information has not changed during the uplink and downlink cycles. Due to the reciprocity of the channel, in adjacent downlink phases, the integrated signal undergoes two approximately identical channel propagations. Then, the synaesthesia frequency domain received signal corresponding to the OFDM frequency domain symbol of the nth subcarrier in the μth downlink phase can be expressed as: μ [n] = x μ,echo [n]*h μ [n]*h μ [n]+η μ [n], n=0,1,…,N-1; μ=0,1,…,N f -1;

[0110] Among them, η μ [n] represents additive white Gaussian noise (AWGN), h μ [n] represents the time domain response coefficient of the n-th subcarrier in the μ-th downlink phase, and * represents a linear convolution operation.

[0111] x μ,echo [n] represents the time domain sampling x of the OFDM frequency domain symbol of the nth subcarrier in the μth downlink phase μ The reflected echo term [n] can be expressed by the following formula:

[0112] Among them, L and f D To detect the echo delay and Doppler frequency shift of the terminal; f D =2vf c / c;

[0113] f c is the carrier frequency, c is the speed of light;

[0114] R and v are the distance and relative speed between the terminal and the subject of the present disclosure, respectively, and are parameters to be determined;

[0115] PRI is the pulse repetition interval.

[0116] In one embodiment, PRI=2T sym .

[0117] Based on the above embodiments, as an optional embodiment, determining the synaesthesia detection results of the terminal in multiple operating cycles based on the echo channel frequency domain response, the synaesthesia frequency domain transmission signal, and the synaesthesia frequency domain reception signal of at least one operating cycle includes:

[0118] Eliminate the first and second sub-items of the echo frequency domain item of the corresponding sub-carrier according to the OFDM frequency domain symbol of the sub-carrier in the synaesthesia frequency domain transmit signal in the downlink phase and the channel frequency domain response coefficient of the corresponding sub-carrier in the echo channel frequency domain response, to obtain the third sub-item of the echo frequency domain item of the corresponding sub-carrier in the downlink phase;

[0119] The synaesthesia detection result is determined according to the third sub-item corresponding to each subcarrier in at least one downlink phase.

[0120] By adding the above x μ,echo The expression of [n] is brought into the expression of the echo received signal, and at the same time, combined with the above channel frequency domain response coefficient H r,μ The expression of [k] can be used to obtain the expression Y of the echo frequency domain term of the kth subcarrier in the μth downlink phase μ [k]:

[0121] It can be seen from the above expression that each echo frequency domain term in the embodiment of the present disclosure includes three sub-terms, wherein the first sub-term is X μ [k], the second sub-item is (H μ [k]) 2 , the third sub-item is

[0122] Further analysis of the third sub-item of each echo frequency domain item shows that the third sub-item includes the distance factor and speed factor

[0123] It can be seen that the distance factor is related to the subcarrier k and the echo delay L of the terminal;

[0124] The speed factor is related to the operating period μ and the terminal's Doppler frequency offset f D Related.

[0125] Therefore, the embodiment of the present disclosure can establish a quotient matrix, in which the divisor of each element in the quotient matrix is ​​the product of the OFDM frequency domain symbol of the subcarrier in the synaesthesia frequency domain transmission signal of a subcarrier in the downlink phase and the channel frequency domain response coefficient of the subcarrier in the echo channel frequency domain response, and the dividend is the echo frequency domain item of the subcarrier in the downlink phase, thereby eliminating the first subitem and the second subitem in the echo frequency domain item, and obtaining the third subitem of the echo frequency domain item of the subcarrier in the downlink phase;

[0126] Specifically, the embodiment of the present disclosure arranges each complete OFDM frequency domain symbol into a column in a matrix form, that is, the following matrix is ​​obtained:

[0127] In order to prevent distortion, M X Update all the 0 elements in to 1, and then perform the division operation on the matrix elements to obtain the quotient matrix M D =M Y / (M X ·M H ), where (·) represents the matrix element-wise multiplication operation, and the elements of the quotient matrix can be expressed as:

[0128] Since the OFDM frequency domain symbols, channel frequency domain response coefficients, and echo frequency domain items of each subcarrier in each operating cycle can be determined, the element values ​​of the above-mentioned quotient matrix can also be determined. By combining all the element values ​​of the quotient matrix, the distance information and relative speed information can be obtained.

[0129] Based on the above embodiments, as an optional embodiment, determining the synaesthesia detection result of the terminal according to the third sub-item corresponding to each subcarrier in each downlink phase includes:

[0130] Performing an inverse discrete Fourier transform (IDFT) operation on the third sub-item corresponding to each subcarrier in the downlink phase to obtain a fourth sub-item corresponding to each subcarrier in the downlink phase;

[0131] Performing a discrete Fourier transform (DFT) operation on the fourth sub-item corresponding to each subcarrier in each downlink phase to obtain a fifth sub-item corresponding to each subcarrier in each downlink phase;

[0132] A synaesthesia detection result is determined according to the fifth sub-item corresponding to at least one subcarrier in at least one downlink phase.

[0133] Specifically, the embodiment of the present disclosure can be used to calculate the quotient matrix M D Each column of N elements is IDFT-operated, so that the quotient matrix M D The elements in are updated to the fourth sub-item corresponding to the subcarrier to extract the distance information of the terminal, and then N are performed on each row of the matrix after the IDFT operation. f The DFT operation of each element is performed, so that the elements in the matrix are further updated to the fifth sub-item corresponding to the subcarrier to extract the speed information of the terminal. The absolute value of the elements of the matrix obtained by the DFT operation can be used to obtain the three-dimensional radar display image, and then the synaesthesia detection result can be obtained.

[0134] The maximum distance of the target that can be detected by the method for determining the synaesthesia detection result adopted by the present disclosure is r max =Tc / 2, the maximum relative speed is v max = ±c / (8f c T sym ), where c and f c are the speed of light and the carrier frequency, respectively. The distance resolution of this method is c / (2NΔf), and the velocity resolution is c / (4N f f c T sym ).

[0135] Assuming that there is a single communication target user at a distance of 20m and a relative speed of 5m / s in the environment, the uplink channel estimation result adopts the ideal channel estimation result, and its simulation parameters are: the number of subcarriers is 1620, the number of accumulated symbols is 560, the carrier frequency is 5GHz, the subcarrier spacing is 60kHz, the CP period is 1.2μs, the bandwidth is 97.2MHz, the maximum effective range is 179.9m, the maximum detection speed is ±419.5m / s, the distance resolution is 1.54m, and the speed resolution is 1.5m / s. Figures 3a and 3b are schematic diagrams of the range-speed radar images obtained by the related art and the present disclosure respectively. It can be seen from Figure 3a that after experiencing a two-way multipath channel, the integrated echo signal presents multiple multipath false target peaks on the range axis in the range-speed radar image after radar processing. As can be seen from Figure 3b, after the multipath interference elimination processing proposed in the present disclosure, the multipath false target peaks in the radar image are eliminated, leaving only the required communication target detection peak value, and its distance and relative speed are accurate. It can be seen that the embodiment of the present disclosure can effectively eliminate the radar multipath interference of the communication target user in the radar image.

[0136] The embodiments of the present disclosure provide an apparatus for determining a synaesthesia detection result. As shown in FIG4 , the apparatus may include: a processing module 401 for determining an uplink channel estimation result in an uplink phase and a synaesthesia frequency domain transmission signal and a synaesthesia frequency domain reception signal in a downlink phase in at least one operation cycle;

[0137] The processing module 401 is further configured to determine a synaesthesia detection result based on an uplink channel estimation result, a synaesthesia frequency domain transmitted signal, and a synaesthesia frequency domain received signal of at least one operation cycle;

[0138] Among them, an operation cycle includes an up phase and a down phase;

[0139] The synaesthesia frequency domain reception signal is determined by demodulating the echo signal, which is the signal reflected by the terminal from the integrated signal sent by the device in the downlink phase;

[0140] The integrated signal is determined by modulating the signal sent in the synaesthesia frequency domain.

[0141] The device of the embodiment of the present disclosure can execute the method provided by the embodiment of the present disclosure, and its implementation principle is similar. The actions performed by each module in the device of each embodiment of the present disclosure correspond to the steps in the method of each embodiment of the present disclosure. For the detailed functional description of each module of the device, please refer to the description in the corresponding method shown in the previous text, and will not be repeated here.

[0142] In an embodiment of the present disclosure, a communication device is provided, including a memory, a processor, and a computer program stored in the memory. The processor executes the above-mentioned computer program to implement the steps of a method for determining synaesthesia detection results. Compared with the related art, the following can be achieved: by analyzing the generation logic and transmission process of the echo signal, it is determined that on the basis of the existing integrated signal, the echo signal is further processed in combination with the propagation channel estimation, which can effectively eliminate the radar multipath interference inherent in the terminal. In order to obtain the propagation channel estimation, the embodiment of the present disclosure subdivides each operating cycle into two stages, uplink and downlink. By receiving the uplink signal in the uplink stage and parsing the uplink signal, the channel estimation of each operating cycle is obtained.

[0143] In an optional embodiment, a communication device is provided, as shown in FIG5 . The communication device 4000 shown in FIG5 includes: a processor 4001 and a memory 4003. The processor 4001 and the memory 4003 are connected, such as via a bus 4002. Optionally, the communication device 4000 may further include a transceiver 4004, which may be used for data exchange between the communication device and other communication devices, such as data transmission and / or data reception. It should be noted that in actual applications, the number of transceivers 4004 is not limited to one, and the structure of the communication device 4000 does not constitute a limitation on the embodiments of the present disclosure.

[0144] Processor 4001 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the present disclosure. Processor 4001 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

[0145] Bus 4002 may include a path for transmitting information between the aforementioned components. Bus 4002 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, for example. Bus 4002 may be divided into an address bus, a data bus, a control bus, and so on. For ease of illustration, FIG5 shows only a single thick line, but this does not indicate that there is only one bus or only one type of bus.

[0146] The memory 4003 may be a ROM (Read Only Memory) or other types of static storage devices that can store static information and instructions, a RAM (Random Access Memory) or other types of dynamic storage devices that can store information and instructions, or an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory) or other optical disk storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media, other magnetic storage devices, or any other medium that can be used to carry or store computer programs and can be read by a computer, without limitation herein.

[0147] The memory 4003 is used to store the computer program for executing the embodiments of the present disclosure, and the execution is controlled by the processor 4001. The processor 4001 is used to execute the computer program stored in the memory 4003 to implement the steps shown in the above method embodiments.

[0148] An embodiment of the present disclosure provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps and corresponding contents of the aforementioned method embodiment can be implemented.

[0149] The embodiments of the present disclosure further provide a computer program product, including a computer program, which can implement the steps and corresponding contents of the aforementioned method embodiments when executed by a processor.

[0150] The terms "first," "second," "third," "fourth," "1," "2," and the like (if any) in the description and claims of the present disclosure and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or sequential sequence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present disclosure described herein can be practiced in an order other than that shown or described.

[0151] It should be understood that, although the flowcharts of the embodiments of the present disclosure indicate the various operation steps by arrows, the order of implementation of these steps is not limited to the order indicated by the arrows. Unless otherwise clearly stated herein, in some implementation scenarios of the embodiments of the present disclosure, the implementation steps in each flowchart can be performed in other orders as required. In addition, some or all of the steps in each flowchart may include multiple sub-steps or multiple stages based on the actual implementation scenario. Some or all of these sub-steps or stages can be executed at the same time, and each sub-step or stage in these sub-steps or stages can also be executed at different times. In scenarios where the execution times are different, the order of execution of these sub-steps or stages can be flexibly configured as required, and the embodiments of the present disclosure do not limit this.

[0152] The above are only optional implementation methods for some implementation scenarios of the present disclosure. It should be pointed out that for ordinary technicians in this technical field, without departing from the technical concept of the solution of the present disclosure, other similar implementation methods based on the technical ideas of the present disclosure are also within the protection scope of the embodiments of the present disclosure.

Claims

1. A method for determining a synaesthesia detection result, the method being executed by a network device, characterized in that: include: Determine an uplink channel estimation result in an uplink phase and a synaesthesia frequency domain transmission signal and a synaesthesia frequency domain reception signal in a downlink phase in at least one operation cycle; Determine the synaesthesia detection result according to the uplink channel estimation result, the synaesthesia frequency domain transmission signal and the synaesthesia frequency domain reception signal of at least one operation cycle; Among them, an operation cycle includes an up phase and a down phase; The synaesthesia frequency domain reception signal is determined by demodulating the echo signal, and the echo signal is a signal reflected by the terminal from the integrated signal sent by the network device in the downlink phase; The integrated signal is determined by modulating the synaesthesia frequency domain transmission signal.

2. The method according to claim 1, characterized in that The step of determining the synaesthesia detection result according to the uplink channel estimation result, the synaesthesia frequency domain transmission signal and the synaesthesia frequency domain reception signal of at least one operation cycle includes: Determine the echo channel frequency domain response of the operation period according to the uplink channel estimation result of the operation period, wherein the echo channel frequency domain response is the channel frequency domain response of the echo signal after two-pass propagation; The synaesthesia detection result is determined according to the echo channel frequency domain response, the synaesthesia frequency domain transmission signal and the synaesthesia frequency domain reception signal of at least one operation cycle.

3. The method according to claim 2, characterized in that The synaesthesia frequency domain received signal includes echo frequency domain items of all subcarriers in the corresponding downlink phase; The echo frequency domain items include: a first sub-item associated with an orthogonal frequency division multiplexing (OFDM) frequency domain symbol of a corresponding subcarrier; a second sub-term related to the channel frequency domain response coefficient of the corresponding subcarrier, and A third sub-item related to the synaesthesia detection result of the terminal.

4. The method according to claim 3, characterized in that The synaesthesia frequency domain transmission signal includes OFDM frequency domain symbols of all subcarriers in the corresponding downlink phase; The echo channel frequency domain response includes channel frequency domain response coefficients of all subcarriers in the corresponding downlink phase; Determining the synaesthesia detection result according to the echo channel frequency domain response, the synaesthesia frequency domain transmission signal and the synaesthesia frequency domain reception signal of at least one operation cycle includes: Eliminate the first sub-item and the second sub-item of the echo frequency domain item of the corresponding sub-carrier according to the OFDM frequency domain symbol of the sub-carrier in the synaesthesia frequency domain transmission signal in the downlink stage and the channel frequency domain response coefficient of the corresponding sub-carrier in the echo channel frequency domain response, so as to obtain the third sub-item of the echo frequency domain item of the corresponding sub-carrier in the downlink stage; The synaesthesia detection result is determined according to the third sub-item corresponding to each sub-carrier in at least one downlink phase.

5. The method according to claim 4, characterized in that The determining of the synaesthesia detection result according to the third sub-item corresponding to each subcarrier in each downlink phase includes: Performing an inverse discrete Fourier transform (IDFT) operation on the third sub-item corresponding to each subcarrier in the downlink phase to obtain a fourth sub-item corresponding to each subcarrier in the downlink phase; Performing a discrete Fourier transform (DFT) operation on the fourth sub-items corresponding to the subcarriers in each downlink stage to obtain fifth sub-items corresponding to the subcarriers in each downlink stage; A synaesthesia detection result is determined according to a fifth sub-item corresponding to at least one subcarrier in at least one downlink phase.

6. The method according to any one of claims 3 to 5, characterized in that: The third sub-item of the echo frequency domain item includes a distance factor and a speed factor; Wherein, the distance factor is related to the subcarrier and the echo delay of the terminal; The speed factor is related to the operation period and the Doppler frequency deviation of the terminal.

7. The method according to claim 2, characterized in that The uplink channel estimation result includes a channel time domain response of one-way propagation.

8. The method according to claim 7, characterized in that Determining the echo channel frequency domain response of the operation period according to the uplink channel estimation result of the operation period includes: Performing a DFT operation on the channel time domain response of the one-way propagation of the operation period to obtain the channel frequency domain response of the one-way propagation of the operation period; The echo channel frequency domain response of the operation period is determined according to the channel frequency domain response of the one-way propagation of the operation period.

9. The method according to claim 8, characterized in that The channel time domain response includes a channel time domain response coefficient of a multipath channel length; and the multipath channel length does not exceed half of a cyclic prefix length.

10. The method according to any one of claims 1 to 8, characterized in that: The duration of the uplink phase and the downlink phase are both the duration of the symbol period.

11. A device for determining synaesthesia detection results, characterized in that: include: A processing module, used to determine an uplink channel estimation result in an uplink phase and a synaesthesia frequency domain transmission signal and a synaesthesia frequency domain reception signal in a downlink phase in at least one operation cycle; The processing module is further used to determine the synaesthesia detection result according to the uplink channel estimation result, the synaesthesia frequency domain transmission signal and the synaesthesia frequency domain reception signal of at least one operation cycle; Among them, an operation cycle includes an up phase and a down phase; The synaesthesia frequency domain reception signal is determined by demodulating the echo signal, and the echo signal is a signal reflected by the terminal from the integrated signal sent by the device in the downlink phase; The integrated signal is determined by modulating the synaesthesia frequency domain transmission signal.

12. A communication device comprising a memory, a processor and a computer program stored in the memory, characterized in that: The processor executes the computer program to implement the steps of the method according to any one of claims 1 to 10.

13. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 10 are implemented.

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