Pilot frequency configuration method, device and equipment and computer readable storage medium

Abstract

The invention provides a pilot frequency configuration method, device and equipment and a computer readable storage medium. The method comprises: a transmitting end device determining a pilot configuration, the pilot configuration comprising at least one of the following: a resource configuration of a pilot signal in a delay Doppler domain; resource configuration of the pilot signals in a time-frequency domain; carrying out sequence configuration on pilot signals; configuring the power of the pilot signal; wherein the pilot configuration is used for generating a delayed Doppler domain pilot signal, the delayed Doppler domain pilot signal is used as a sensing signal, and a time-frequency domain transform signal of the delayed Doppler domain pilot signal is used as a demodulation reference signal (DMRS).

Description

Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a pilot configuration method, apparatus, device, and computer-readable storage medium. Background Art

[0002] Integrated sensing and communication (ISAC) integrates the dual functions of communication and perception. In order to optimize the two functions, the perception function is implemented through the orthogonal time-frequency space (OTFS) modulation waveform, and the communication function is implemented through the orthogonal frequency-division multiplexing (OFDM) waveform. In this case, for the communication receiving side, two sets of pilot configurations need to be obtained when performing channel estimation, which increases the signaling overhead of the pilot configuration. Summary of the invention

[0003] The present application provides a pilot configuration method, apparatus, device and computer-readable storage medium, in which the perception function and the communication function can share the pilot configuration, which is beneficial to reducing the signaling overhead of the pilot configuration.

[0004] In a first aspect, a pilot configuration method is provided, including:

[0005] The transmitting end device determines a pilot configuration, where the pilot configuration includes at least one of the following:

[0006] Resource allocation of pilot signals in the delay-Doppler domain;

[0007] Resource allocation of pilot signals in the time-frequency domain;

[0008] Sequence configuration of pilot signals;

[0009] Power configuration of the pilot signal;

[0010] The pilot configuration is used to generate a delayed Doppler domain pilot signal, the delayed Doppler domain pilot signal is used as a perception signal, and the time-frequency domain transformed signal of the delayed Doppler domain pilot signal is used as a demodulation reference signal DMRS.

[0011] In a second aspect, a pilot configuration method is provided, including:

[0012] The receiving device obtains the pilot configuration;

[0013] The pilot configuration includes at least one of the following:

[0014] Resource allocation of pilot signals in the delay-Doppler domain;

[0015] Resource allocation of pilot signals in the time-frequency domain;

[0016] Sequence configuration of pilot signals;

[0017] Power configuration of the pilot signal;

[0018] The pilot signal is used as a perception signal, and the pilot signal is used as a demodulation reference signal DMRS.

[0019] According to a third aspect, a pilot configuration device is provided, including:

[0020] A processing unit is configured to determine a pilot configuration, where the pilot configuration includes at least one of the following:

[0021] Resource allocation of pilot signals in the delay-Doppler domain;

[0022] Resource allocation of pilot signals in the time-frequency domain;

[0023] Sequence configuration of pilot signals;

[0024] Power configuration of the pilot signal;

[0025] The pilot configuration is used to generate a delayed Doppler domain pilot signal, the delayed Doppler domain pilot signal is used as a perception signal, and the time-frequency domain transformed signal of the delayed Doppler domain pilot signal is used as a demodulation reference signal DMRS.

[0026] In a fourth aspect, a pilot configuration device is provided, including:

[0027] A processing unit, configured to obtain a pilot configuration;

[0028] The pilot configuration includes at least one of the following:

[0029] Resource allocation of pilot signals in the delay-Doppler domain;

[0030] Resource allocation of pilot signals in the time-frequency domain;

[0031] Sequence configuration of pilot signals;

[0032] Power configuration of the pilot signal;

[0033] The pilot signal is used as a perception signal, and the pilot signal is used as a demodulation reference signal DMRS.

[0034] In a fifth aspect, a communication device is provided, comprising a processor and a memory; wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method in the above-mentioned first aspect or its various implementations, or the method in the above-mentioned second aspect or its various implementations.

[0035] In a sixth aspect, a chip is provided for implementing the method in any one of the first to second aspects or their respective implementations. Specifically, the chip includes: a processor for calling and running a computer program from a memory, so that a device equipped with the chip executes the method in any one of the first to second aspects or their respective implementations.

[0036] In a seventh aspect, a computer-readable storage medium is provided for storing a computer program, wherein the computer program enables a computer to execute the method of any one of the first to second aspects or any of their implementations.

[0037] In an eighth aspect, a communication system is provided, wherein the communication system comprises the pilot configuration device as described in the third aspect and the fourth aspect.

[0038] In the ninth aspect, a computer program / program product is provided, wherein the computer program / program product is stored in a storage medium, and the computer program / program product enables at least one processor to execute the method of any aspect of the first to second aspects above or its various implementations.

[0039] Based on the above technical solution, the perception function and the communication function can share a pilot configuration, wherein the pilot configuration can be used to generate a delayed Doppler domain pilot signal, the delayed Doppler domain pilot signal is used as a perception signal, and the time-frequency domain transform signal of the delayed Doppler domain pilot signal is used as a demodulation reference signal DMRS.

[0040] Furthermore, the pilot configuration may include at least one of the resource configuration of the pilot signal in the delayed Doppler domain, the resource configuration of the pilot signal in the time-frequency domain, the sequence configuration of the pilot signal, and the power configuration of the pilot signal. Therefore, in practical applications, for the OFDM communication function, flexible configuration of the pilot resources can be achieved through the resource configuration of the pilot signal, flexible configuration of the pilot sequence can be achieved through the sequence configuration of the pilot signal, and flexible configuration of the pilot power can be achieved through the power configuration of the pilot signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of a communication system architecture provided in an embodiment of the present application.

[0042] Figure 2 This is the flow chart of OTFS implementation based on OFDM system.

[0043] Figure 3 It is a schematic diagram of the correlation conversion between delay Doppler domain and time-frequency domain.

[0044] Figure 4 It is a schematic diagram of resource multiplexing of perception pilot and data in TF domain.

[0045] Figure 5 This is a pilot configuration diagram provided in an embodiment of the present application.

[0046] Figure 6 This is another pilot configuration schematic diagram provided in an embodiment of the present application.

[0047] Figure 7 It is a schematic flowchart of a pilot configuration method provided in an embodiment of the present application.

[0048] Figure 8 It is a schematic interactive diagram of a pilot configuration method provided in an embodiment of the present application.

[0049] Fig. 9 It is a schematic block diagram of a pilot configuration device provided in an embodiment of the present application.

[0050] Fig.10 It is a schematic diagram and block diagram of another pilot configuration device provided in an embodiment of the present application.

[0051] Fig.11 It is a schematic structural diagram of a communication device provided in an embodiment of the present application.

[0052] Fig.12 It is a schematic structural diagram of a chip provided in an embodiment of the present application.

[0053] Fig.13 It is a schematic diagram of the hardware structure of a terminal provided in an embodiment of the present application.

[0054] Fig.14 It is a schematic diagram of the hardware structure of a network side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0056] The terms "first", "second", etc. of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of one type, and the number of objects is not limited, for example, the first object can be one or more. In addition, "or" in the present application represents at least one of the connected objects. For example, "A or B" covers three schemes, namely, Scheme 1: including A but not including B; Scheme 2: including B but not including A; Scheme 3: including both A and B. The character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0057] The term "indication" in this application can be a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, operations to be performed, or request results in the sent indication; an indirect indication can be understood as the receiver determining the corresponding information according to the indication sent by the sender, or making a judgment and determining the operation to be performed or the request result according to the judgment result.

[0058] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and the NR terminology is used in most of the following descriptions, but these technologies can also be applied to systems other than NR systems, such as the 6th generation (6 thGeneration, 6G) communication system.

[0059] Figure 1A block diagram of a wireless communication system applicable to an embodiment of the present application is shown. The wireless communication system includes a terminal 11 and a network side device 12. Among them, the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (Ultra-mobile Personal Computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), an augmented reality (Augmented Reality, AR), a virtual reality (Virtual Reality, VR) device, a robot, a wearable device (Wearable Device), an aircraft (flight vehicle), a vehicle-mounted device (Vehicle User Equipment, VUE), a ship-mounted device, a pedestrian terminal (Pedestrian User Equipment, PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, televisions, washing machines or furniture, etc.), a game console, a personal computer (Personal Computer, PC), a teller machine or a self-service machine and other terminal side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be referred to as a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (Wireless Local Area Network, WLAN) access point (Access Point, AS) or a wireless fidelity (Wireless Fidelity, WiFi) node, etc.Among them, the base station can be called Node B (Node B, NB), Evolved Node B (Evolved Node B, eNB), the next generation Node B (the next generation Node B, gNB), New Radio Node B (New Radio Node B, NR Node B), access point, Relay Base Station (Relay Base Station, RBS), Serving Base Station (Serving Base Station, SBS), Base Transceiver Station (Base Transceiver Station, BTS), Radio Base Station, Radio Transceiver, Basic Service Set (Basic Service Set, BSS), Extended Service Set (Extended Service Set, ESS), Home Node B (home Node B, HNB), Home Evolved Node B (home evolved Node B), Transmission Reception Point (Transmission Reception Point, TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

[0060] To facilitate understanding of the embodiments of the present application, the Delay Doppler (DD) domain modulation technology related to the present application is described.

[0061] Delay Doppler domain modulation is to logically map the information in a data packet of size N×M, such as a Quadrature Amplitude Modulation (QAM) symbol, to an N×M grid point on a two-dimensional delay Doppler plane, that is, the pulse in each grid point modulates a QAM symbol in the data packet. Then, through a specific basis function transformation, the data set on the N×M delay Doppler domain plane is transformed into a time domain transmission data set.

[0062] The current mainstream delay Doppler domain modulation technology includes Orthogonal Time Frequency Space (OTFS) modulation technology. The OTFS system based on Orthogonal Frequency-Division Multiplexing (OFDM) is implemented by adding a precoder on the transmitting side of the OFDM system, in which the transmit signal x[k,l] is converted from the delay Doppler domain to the time-frequency domain using the Inverse Symplectic Fourier Transform (ISFFT). Then, the transceiver process of the OFDM system is used to obtain the received signal Y[m,n] in the time-frequency domain, which is input into the decoder added on the receiving side, in which the received signal y[k,l] in the delay Doppler domain is calculated using the Symplectic Fourier Transform (SFFT). Then, y[k,l] is subjected to channel estimation and equalization processing in the delay Doppler domain to obtain an estimate of the transmitted signal. The process is as follows Figure 2 shown.

[0063] pass Figure 2 The ISSFT and SSFT transformations in the OTFS data and the transformation relationship between the delay-Doppler domain and the time-frequency domain are as follows: Figure 3 As shown, OTFS data refers to the data obtained based on OTFS modulation:

[0064] Based on the delay Doppler domain modulation technology, the time-varying time-frequency domain channel can be transformed into an approximately time-invariant delay Doppler domain channel, which can directly reflect the channel delay Doppler response characteristics caused by the geometric characteristics of the relative position of the reflector between the transceivers in the wireless link. Based on this, the delay Doppler domain modulation technology has the following advantages:

[0065] 1) Invariance of channel coupling state. Since the signal delay and Doppler response reflect the direct effect of reflectors in the physical channel and only depend on the relative speed and position of the reflectors, the signal delay and Doppler response can be regarded as invariant on the time scale of the wireless frame.

[0066] 2) Separability of channel coupling states. In the channel frequency response in the delay-Doppler domain, all diversity paths are reflected as a single impulse response and are completely separable. The QAM symbol traverses all these hierarchical paths.

[0067] 3) Orthogonality of channel coupling states: When the resolution of the waveform design is sufficient, the channel impulse response in the delay-Doppler domain can be considered to be limited to a delay-Doppler domain resource element (RE), thus theoretically eliminating interference between adjacent data on the delay-Doppler resource grid.

[0068] To facilitate understanding of the embodiments of the present application, the Integrated sensing and communication (ISAC) technology related to the present application is explained.

[0069] Future communication devices can integrate the dual functions of communication and perception through a protocol stack based on ISAC technology, realize hardware sharing, spectrum sharing, and protocol intercommunication between communication signals and perception signals, thereby realizing the integrated design of communication and perception functions. The core feature of future ISAC devices is the realization of waveform multiplexing between communication signals and perception signals. For example, through the waveform defined by the protocol, information transmission and target detection are carried out in the spectrum specified by the protocol. Furthermore, through a shared protocol stack, the channel information and spatial information obtained by the communication system and the perception system can be intercommunication, thereby realizing mutual assistance between communication and perception and further optimizing the overall performance.

[0070] The biggest challenge facing ISAC technology is the problem of coordinated work between communication and perception. The function of the communication system is to transmit information, so the optimization goal of the communication system is to approximate the Shannon channel capacity described in information theory; the function of the perception system is target detection, such as a typical radar system, whose optimization goal is the optimal lower bound of the estimated variance of the target parameters (range, speed, Doppler, etc.), that is, the Cramér-Rao bound of the fuzzy function. This difference in functional emphasis makes it difficult to optimize the performance of communication and perception at the same time in the design of the ISAC system, and it can only be compromised between the two according to the needs.

[0071] In the integrated design of radar-based communication and sensing, waveform design is the key. The key to integrated waveform design is to minimize the interference between communication signals and sensing signals, meet the requirements of communication and sensing functions, and improve spectrum efficiency under the premise of ensuring system performance. The integrated waveform can be reused, including but not limited to time division multiplexing, frequency division multiplexing, and space division multiplexing, or it can be shared, that is, designing a new fusion waveform. When designing, it is necessary to consider whether the integrated waveform should be based on communication function or radar detection function, and find a balance in performance. Common fusion waveforms include but are not limited to single-carrier waveforms and multi-carrier waveforms. Among them, single-carrier waveform design is usually combined with spread spectrum technology, such as direct-sequence spread spectrum (DSSS) and chirp spread spectrum (CSS); the multi-carrier integrated waveform is typically orthogonal frequency division multiplexing (OFDM) waveform, which has certain advantages over single-carrier spread spectrum integrated waveforms, such as higher spectrum efficiency, flexible bandwidth resource allocation, no range-Doppler coupling effect, etc., and is easier to integrate with 5G communication systems.

[0072] The traditional multi-carrier integrated waveform is mainly based on the OFDM waveform, and its advantages mainly lie in simple random signal generation, fully digital processing, and extremely high time-frequency processing gain. However, since the high accuracy of OFDM radar depends on the joint detection of multiple OFDM symbols, and the cyclic prefix (CP) of the OFDM symbol does not participate in the measurement, it will cause certain overhead; at the same time, the OFDM waveform has poor adaptability to high Doppler scenarios and can only detect Doppler frequency shifts of up to 10% of the subcarrier spacing, which has limitations in application scenarios.

[0073] Using the OTFS waveform as a sensing waveform can overcome the above two defects of the OFDM waveform. First, for a resource block of the same size of N*M, assume that M is the number of symbols and N is the number of subcarriers. The OTFS signal only needs to add a CP in front of the M symbols to avoid interference between time slots; while the traditional OFDM signal needs to add a CP in front of each symbol to avoid inter-symbol interference, so a total of M CPs are required. Therefore, the overhead of the OTFS waveform is significantly reduced, which means that it can use more energy to sense the signal itself, thereby improving the detection and tracking capabilities of the target. Secondly, due to the natural tolerance of the OTFS signal to high Doppler, the OTFS radar has good detection capabilities for larger Doppler frequency shifts in high-speed scenarios, which is much better than OFDM radar.

[0074] To facilitate understanding of the embodiments of the present application, the pilot design across transform domains related to the present application is described.

[0075] Without loss of generality, assume that a = [a 1 ,a 2 ,…,a Q ],b=[b 1 ,b 2 ,…,b P ] T are two known sequences with good autocorrelation characteristics, then the sequence C can be constructed as follows:

[0076]

[0077] As a two-dimensional pilot block with good autocorrelation and cross-correlation characteristics, C can be used for delay Doppler domain sensing. Assume that the size of the two-dimensional pilot block is N P ×M P ,N P ≤N,M P ≤M, mapped separately in the delay-Doppler domain resource of size N×M, where N is the resource length of the delay domain, M is the resource length of the Doppler domain, and N P is the resource length occupied by the two-dimensional pilot block in the delay domain, M P is the resource length of the two-dimensional pilot block in the Doppler domain. The two-dimensional pilot block is superimposed and placed with the OFDM data after ISFFT transformation, such as Figure 4 As shown, OFDM data may refer to data modulated based on OFDM technology.

[0078] exist Figure 4 In the OFDM communication system, the perceptual pilot (using OTFS waveform) is superimposed with the OFDM data in the time-frequency domain, and the perceptual pilot can be configured across data blocks (for example, across OFDM subbands or time slots). For OFDM communication systems, it usually uses a comb-mapped demodulation reference signal (DMRS) for channel estimation, and the receiver uses the estimated channel for channel equalization. Since the channel acts on the signal as multiplication in the time-frequency domain, we can use matrix dot division to calculate the channel matrix, that is, divide the sent DMRS by the received DMRS, and the quotient matrix is ​​the desired channel matrix.

[0079] Since the above scheme is based on the superposition of the perceptual pilots in the time-frequency domain and the OFDM data, the equivalent pilot to be considered is the sum of the DMRS of the OFDM data and the perceptual pilots at the corresponding position, that is, Figure 4 The perceptual pilot in the upper part is Figure 4 The sum of the DMRS in the lower half.

[0080] After obtaining the equivalent pilot, the traditional OFDM channel estimation method can be used to obtain the estimated value of the channel matrix in the time-frequency domain. Then, the estimated channel matrix and the prior knowledge of the perceptual pilot are used to calculate the interference of the perceptual pilot on the OFDM data in the time-frequency domain, and this interference is removed before channel equalization.

[0081] However, in order to obtain an equivalent pilot, the OFDM system needs to configure two sets of pilot information, namely, the OTFS sensing pilot and the DMRS information of the OFDM data, and the update periods of these two pilot configurations are independent of each other, which may cause a large signaling reconfiguration overhead.

[0082] In view of this, an embodiment of the present application provides a technical solution, in which the perception function and the communication function can share the pilot configuration, so that the DD domain pilot (Delay-Doppler Domain Pilot, DDDP) can be used to implement the perception function, and the time-frequency domain transformation signal (Time-Frequency Domain Pilot, TFDP) of the DD domain pilot can be used to implement the channel estimation function. Alternatively, it can also be understood as: using the time-frequency domain pilot to implement the channel estimation function, and using the DD domain transformation signal of the time-frequency domain pilot to implement the perception function.

[0083] The technical solution of the embodiment of the present application is designed based on the properties of Fourier transform, that is, the interpolation zero operation in one domain (such as time domain) is equivalent to the copy operation in another domain (such as frequency domain) after Fourier transform:

[0084]

[0085] Therefore, by replicating DDDP on the resource blocks in the DD domain as needed and performing time-frequency domain transformation on the replicated pilot blocks in a certain dimension (e.g., horizontal dimension, or Doppler dimension), an interpolation zero operation can be implemented on the corresponding dimension in the TF domain (e.g., horizontal dimension, or time domain dimension), that is, leaving resource positions corresponding to zero values ​​vacant.

[0086] Furthermore, when performing OFDM modulation symbol mapping in the TF domain, OFDM data can be mapped to the resource position corresponding to the zero value, and the resource position corresponding to the non-zero value is the TFDP obtained by transforming the DDDP in the time-frequency domain. The TFDP at the non-zero value position can be used as the DMRS of the OFDM data.

[0087] For example, Figure 5 The pilot block in (a) The corresponding two-dimensional Fourier transform result is Figure 5 (b) because It is copied 4 times in the horizontal direction and 2 times in the vertical direction, which is equivalent to obtaining a pilot block. Therefore, the result after copy extension (such as Figure 5 (a) After performing 8-point DFT / IDFT in the horizontal direction and 4-point DFT / IDFT in the vertical direction, the result is Interpolate 3 zeros in the horizontal direction and 1 zero in the vertical direction, and the final result is Figure 5 As shown in (b) in .

[0088] Fourier transform also has the duality of cyclic shift and phase change. If we need to change the cyclic shift of a sequence in one domain, we can use the phase change of each element in its Fourier transform dual sequence in another domain to achieve it. That is:

[0089]

[0090] Therefore, by performing phase transformation on DDDP, cyclic shift of TFDP in the time domain can be achieved.

[0091] For example, for OFDM signals, the flexibility of resource configuration can be ensured by configuring the starting position of TFDP in the time-frequency domain. 0 The current position is the starting position, and the coordinates of the upper left corner of the resource grid are (0,0). Figure 5 The starting position of the pilot in (b) is (0,0). Figure 6 In (b), the starting position of the pilot is (2,1). Therefore, Figure 6 (b) can be regarded as Figure 5 (b) Circular displacement of 2 grids in the horizontal direction and 1 grid in the vertical direction. Figure 6 The pilot mapping pattern in (b) needs to be Figure 5 The DDDP in (a) is phase-adjusted, where Represents the value of each element in the phase-adjusted DDDP.

[0092] To facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments.

[0093] Figure 7 is a schematic flow chart of a wireless communication method 700 according to an embodiment of the present application, such as Figure 7 As shown, the method 700 includes at least part of the following:

[0094] S710: The transmitting end device determines a pilot configuration, wherein the pilot configuration is used to determine at least one of a resource, a sequence, and a power of a pilot signal.

[0095] In some embodiments, the pilot configuration includes at least one of the following:

[0096] Resource allocation of pilot signals in the delay-Doppler domain;

[0097] Resource allocation of pilot signals in the time-frequency domain;

[0098] Sequence configuration of pilot signals;

[0099] Power configuration of the pilot signal.

[0100] Optionally, the sending end device may be a network side device, and the receiving end device may be a terminal device.

[0101] Optionally, the sending end device may be a terminal device, and the receiving end device may be a network side device or another terminal device.

[0102] Optionally, the sending end device and the receiving end device may be different devices, or may be the same device, for example, the sending end device and the receiving end device are co-located.

[0103] Optionally, the sending end device and the receiving end device may be referred to as ISAC devices.

[0104] In the embodiment of the present application, the transmitting end device may be a transmitting end device of the pilot signal, and the receiving end device may be a receiving end device of the pilot signal. Optionally, the transmitting end device may also be a sender of the pilot configuration, or the pilot configuration may also be sent to the receiving end device by other devices, or determined by the receiving end device.

[0105] In some embodiments, the pilot configuration is used to generate a delayed Doppler domain pilot signal (ie, DDDP), the delayed Doppler domain pilot signal is used as a sensing signal, and the time-frequency domain transform signal (ie, TFDP) of the delayed Doppler domain pilot signal is used as a demodulation reference signal DMRS.

[0106] Therefore, in the application embodiment, the ISAC system may not adopt the traditional OFDM DMRS configuration method, but only use a set of pilot configurations to realize the two functions of perception and OFDM communication, that is, use DDDP to realize the perception function, and use the time-frequency domain transformation signal of DDDP to realize the communication function, or use TFDP to realize the communication function, and use the DD domain transformation signal of TFDP to realize the perception function. In the actual system, for the OFDM communication function, the DMRS for channel estimation can be flexibly configured according to the needs of the business and scenario. For example, flexible configuration of pilot resources can be realized through resource configuration of pilot signals, flexible configuration of pilot sequences can be realized through sequence configuration of pilot signals, and flexible configuration of pilot power can be realized through power configuration of pilot signals.

[0107] Optionally, the pilot configuration may be determined by the transmitting device itself. For example, the transmitting device may determine the pilot configuration according to the service requirements of the synaesthesia integration system (eg, performance requirements of the perception pilot, data transmission requirements), etc.

[0108] Optionally, the pilot configuration is determined by the transmitting end device according to a preset rule (eg, a protocol agreement). For example, the protocol agrees on candidate pilot configurations, and the transmitting end device can select a target pilot configuration from the candidate pilot configurations.

[0109] Optionally, the pilot configuration is determined by the transmitting device according to the network configuration. For example, the network side device may indicate the pilot configuration to the transmitting device, and the transmitting device may use the pilot configuration as the target pilot configuration.

[0110] Optionally, the pilot configuration may be sent by a receiving device. For example, the receiving device may indicate its desired pilot configuration to the transmitting device, and the transmitting device may use the pilot configuration as a target pilot configuration, or may adjust the pilot configuration and use the adjusted pilot configuration as the target pilot configuration.

[0111] Optionally, the pilot configuration may be negotiated between the transmitting device and the receiving device.

[0112] In some embodiments of the present application, the method 700 further includes:

[0113] The receiving device obtains the pilot configuration.

[0114] In some embodiments, the receiving device receives the pilot configuration sent by the sending device, or the pilot configuration sent by the sending device forwarded by other devices, that is, the sending device can directly send the pilot configuration to the receiving device, or forward the pilot configuration to the receiving device through other devices.

[0115] In some specific embodiments, when the transmitting device and the receiving device are different devices, the transmitting device may indicate the pilot configuration to the receiving device. For example, the transmitting device may directly send the pilot configuration to the receiving device, for example, through signaling such as Media Access Control Control Element (MACCE), Downlink Control Information (DCI), Radio Resource Control (RRC), etc. Alternatively, the pilot configuration may be forwarded to the receiving device through other devices in the communication system. For example, the other device may be a perception function network element in the system.

[0116] In some other specific embodiments, when the transmitting device and the receiving device are the same device, the transmitting device may not indicate the pilot configuration to the receiving device. For example, when the transmitting device and the receiving device are co-located, the transmitting device does not need to indicate the pilot configuration to the receiving device.

[0117] Optionally, the receiving device may also obtain the pilot configuration according to a preset rule (such as a protocol agreement). For example, the receiving device may determine the pilot configuration in the same manner as the transmitting device, thereby ensuring that the receiving device and the transmitting device have a consistent understanding of the pilot configuration. Alternatively, the receiving device may also send the pilot configuration determined according to the protocol agreement to the transmitting device, thereby ensuring that the two have a consistent understanding of the pilot configuration and ensuring normal reception of the pilot signal.

[0118] Optionally, the pilot configuration may also be configured by the network side device to the receiving device. For example, the network side device may indicate the same pilot configuration to the transmitting device and the receiving device. The transmitting device may send a pilot signal based on the pilot configuration. Correspondingly, the receiving device may receive a pilot signal based on the pilot configuration. This ensures that the transmitting device and the receiving device have a consistent understanding of the pilot configuration and that the pilot signal is received normally.

[0119] In some embodiments, resource configuration of the pilot signal in the DD domain includes but is not limited to at least one of the following:

[0120] The resource length M occupied by the pilot signal in the Doppler domain;

[0121] The resource length N occupied by the pilot signal in the delay domain.

[0122] In some embodiments, M may be the number of resource units occupied by the pilot signal in the Doppler domain.

[0123] In some embodiments, N may be the number of resource units occupied by the pilot signal in the delay domain.

[0124] Optionally, the resource length M may be specified by a protocol, or may be determined by a transmitting device. For example, the transmitting device may select one of multiple candidate resource lengths as a target resource length. Optionally, the multiple candidate resource lengths may be specified by a protocol, or may be determined by a transmitting device.

[0125] Optionally, the resource length N may be specified by a protocol, or may be determined by a transmitting device, for example, the transmitting device may select one of multiple candidate resource lengths as a target resource length. Optionally, the multiple candidate resource lengths may be specified by a protocol, or may be determined by a transmitting device.

[0126] In some embodiments, resource configuration of the pilot signal in the time-frequency domain includes but is not limited to at least one of the following:

[0127] The starting position of the pilot signal in the time-frequency domain;

[0128] The time domain density K of the pilot signal, where K is a positive integer greater than 1;

[0129] The frequency domain density L of the pilot signal, where L is a positive integer greater than 1;

[0130] The size of resources occupied by a pilot signal in the time-frequency domain.

[0131] Optionally, the starting position of the pilot signal in the time-frequency domain may include the starting position of the pilot signal in the time domain and / or the starting position of the pilot signal in the frequency domain.

[0132] Optionally, the starting position of the pilot signal in the time-frequency domain can be represented by position coordinates in a coordinate system established with a reference point as the origin, and the reference point can be any point in the time-frequency resource grid, or a specific point, such as the upper left point or the lower left point. Optionally, the size of the time-frequency resource grid can be specified by the protocol, or can also be determined by the transmitting end device.

[0133] In some embodiments, the size of the time-frequency resource grid can be determined according to the size of the data packet to be transmitted and related transmission parameters (such as modulation order, coding rate, system / BWP bandwidth), etc.

[0134] In other embodiments, the time-frequency resource grid size can be determined according to the performance requirements of the perceptual pilot. Assume that the bandwidth of a signal is B, the signal duration is T_slot, the subcarrier spacing is Δf, and the OFDM symbol length is T. When the signal occupies X*Y resource grids after sampling, B=YΔf, T_slot=XT. In perceptual signal processing, the signal bandwidth (equivalent to the frequency domain resource size Y) determines the delay resolution, i.e. 1 / YΔf, and the signal duration (equivalent to the time domain resource size X) determines the Doppler resolution, i.e. 1 / XT.

[0135] In the synaesthesia system, since 1) the system bandwidth of the communication system usually has only limited choices, denoted as Y_i; 2) there are known delay and Doppler resolution requirements for the perception scene, denoted as τ_min and ν_min. First, the selection of the system bandwidth Y_i needs to satisfy: 1 / Y_iΔf>=τ_min. Secondly, according to the Doppler resolution requirements, it can be determined that the OFDX symbol length X occupied by the signal needs to satisfy: 1 / XT>=ν_min. It can be further determined that the time-frequency resource grid size is X*Y_i, that is, the size of the time-frequency resource grid is X OFDX symbols*Y_i subcarriers.

[0136] In some embodiments, when determining the length of the OFDM symbol occupied by the signal, Q_i can be used as a unit, where Q_i represents the length of the minimum processing unit (subframe / time slot) for modulation and decoding of the data packet (the unit of length is OFDM symbol). For example, in order to reduce processing complexity, the frame boundaries of the pilot and data can be aligned. In this case, X needs to be taken as an integer multiple of Q_i, for example, X_i=ceil(X / Q_i)*Q_i, where ceil() means rounding up. At this time, the size of the time-frequency resource grid is X_i*Y_i, that is, the size of the time-frequency resource grid is X_i OFDM symbols*Y_i subcarriers.

[0137] Optionally, the time domain density of the pilot signal can be used to indicate the sparsity of the pilot signal in the time domain, or the mapping density. For example, the unit of the time domain density K is OFDM symbol, then when the time domain density of the pilot signal is K, it means that two adjacent non-zero value samples in the pilot signal are separated by (K-1) OFDM symbols in the time domain.

[0138] Optionally, the time domain density K may be specified by a protocol, or may be determined by a transmitting end device, for example, the transmitting end device may select one of multiple time domain densities as a target time domain density. Optionally, the multiple time domain densities may be specified by a protocol, or may be determined by a transmitting end device.

[0139] Optionally, the frequency domain density of the pilot signal can be used for the sparsity of the pilot signal in the frequency domain, or mapping density. For example, the unit of the frequency domain density L can be a subcarrier, then when the frequency domain density of the pilot signal is L, it means that two adjacent non-zero value samples (or non-zero value TFDP) in the pilot signal are separated by (L-1) subcarriers in the frequency domain.

[0140] That is, two adjacent non-zero value samples in the pilot signal are separated by (K-1) OFDM symbols in the time domain and by (L-1) subcarriers in the frequency domain.

[0141] Optionally, the frequency domain density L may be specified by a protocol, or may be determined by a transmitting end device, for example, the transmitting end device may select one of multiple frequency domain densities as a target frequency domain density. Optionally, the multiple frequency domain densities may be specified by a protocol, or may be determined by a transmitting end device.

[0142] Optionally, the time domain density K of the pilot signal in the pilot configuration may also be replaced by the time domain interval of the pilot signal (ie, the time domain interval between non-zero valued samples (or non-zero valued TFDP) in the pilot signal), ie, K-1.

[0143] Optionally, the frequency domain density L of the pilot signal in the pilot configuration may also be replaced by the frequency domain interval of the pilot signal (ie, the frequency domain interval between non-zero valued samples (or non-zero valued TFDP) in the pilot signal), ie, L-1.

[0144] That is, the resource configuration of the pilot signal in the time-frequency domain includes but is not limited to at least one of the following:

[0145] The starting position of the pilot signal in the time-frequency domain;

[0146] The time domain interval of the pilot signal is K-1, where K is a positive integer greater than 1;

[0147] The frequency domain interval of the pilot signal is L-1, where L is a positive integer greater than 1.

[0148] In an embodiment of the present application, the periodic extension parameters of DDDP in the delay and Doppler dimensions are related to the sparsity of TFDP in the frequency and time dimensions (or referred to as mapping density, i.e., time domain density and frequency domain density). For example, the periodic extension parameters of DDDP in the delay dimension (i.e., the resource length N occupied by the pilot signal in the delay domain) are related to the sparsity of the TF domain in the frequency dimension (i.e., the frequency domain density L of the pilot signal), for example, the two are equal. The periodic extension parameters of DDDP in the Doppler dimension (i.e., the resource length M occupied by the pilot signal in the Doppler domain) are related to the sparsity of the TF domain in the time domain dimension (i.e., the time domain density K of the pilot signal), for example, the two are equal.

[0149] In some embodiments, the resource size occupied by a pilot signal in the time-frequency domain may be represented by the number of time-domain units occupied by a pilot signal in the time domain and / or the number of frequency-domain units occupied by a pilot signal in the frequency domain.

[0150] Optionally, the time domain unit may be an OFDM symbol, a time slot, a subframe, a radio frame, etc., and the frequency domain unit may be a subcarrier, a physical resource block (PRB), a subchannel, a subband, a bandwidth part (Band Width Part, BWP), etc., but the present application is not limited thereto.

[0151] Optionally, the number of time domain units occupied by a pilot signal in the time domain may be M / K, and the number of frequency domain units occupied by a pilot signal in the frequency domain may be N / L.

[0152] Optionally, the resource size occupied by a pilot signal in the time-frequency domain may also be defined as: the number of non-zero sample points of TFDP in the time dimension, ie, N / L, and the number of non-zero sample points in the frequency dimension, ie, M / K.

[0153] It should be understood that in an embodiment of the present application, the transmitting device can directly indicate to the receiving device the size of resources occupied by a pilot signal in the time-frequency domain, or it can also indicate parameters used to calculate the size of resources occupied by a pilot signal in the time-frequency domain, such as the above-mentioned M, N, K, and L parameters. The present application does not limit the specific indication method.

[0154] In some embodiments, the sequence configuration of the pilot signal includes but is not limited to at least one of the following:

[0155] The type of basic sequence used to generate the pilot signal, the generation formula of the basic sequence, and the generation parameters of the basic sequence.

[0156] In some embodiments, the generation parameters of the base sequence include: an initial value of the base sequence, or a DMRS scrambling identity (NID SSCID) and a DMRS scrambling initialization (NSCID) used to generate the initial value of the base sequence.

[0157] In some embodiments, the base sequence used to generate the pilot signal may include a first sequence and a second sequence, and the sequence configuration of the pilot signal may include a sequence configuration used to generate the first sequence and a sequence configuration used to generate the second sequence.

[0158] In some embodiments, the sequence configuration of the pilot signal may include at least one of the parameters in Table 1.

[0159] Table 1

[0160]

[0161] Among them, dddp.type1 is used to indicate the type of the first sequence, dddp.cinit1 is used to indicate the initial value of the first sequence, dddp.polynomial1 is used to indicate the generator type of the first sequence, or to determine the generation formula of the first sequence, dddp.length1 is used to indicate the length of the first sequence, and dddp.phaseOff1 is used to indicate the phase adjustment parameter of the first sequence. dddp.type2 is used to indicate the type of the second sequence, dddp.cinit2 is used to indicate the initial value of the second sequence, dddp.polynomial2 is used to indicate the generator type of the second sequence, or to determine the generation formula of the second sequence, dddp.length2 is used to indicate the length of the second sequence, and dddp.phaseOff2 is used to indicate the phase adjustment parameter of the second sequence.

[0162] In some embodiments, the power configuration of the pilot signal is used to determine the transmit power used to transmit the pilot signal. For example, the power configuration includes a power scaling factor of the pilot signal, which is a power scaling factor of the transmit power of the pilot signal relative to the transmit power of the data signal. For example, the power scaling factor may indicate a power scaling factor of the transmit power of the DMRS relative to the transmit power of the physical channel. Therefore, the transmit power of the DMRS can be flexibly adjusted through this parameter.

[0163] In some embodiments of the present application, the method 700 further includes:

[0164] According to the pilot configuration, a target delay Doppler domain pilot signal (target DDDP for short) is generated.

[0165] The following describes a method for generating a DD domain pilot signal provided in an embodiment of the present application in conjunction with a specific embodiment.

[0166] In some embodiments, generating a target delayed Doppler domain pilot signal according to the pilot configuration comprises the following steps:

[0167] Step 1: Generate a first sequence with autocorrelation, where the length of the first sequence is related to the resource length M occupied by the pilot signal in the Doppler domain and the time domain density K of the pilot signal.

[0168] For example, to generate a length of The first series with good autocorrelation Indicates plural.

[0169] Optionally, at least one cyclic prefix and / or at least one cyclic suffix may be added to the first sequence.

[0170] For example, add a length of L to the first sequence cp The cyclic prefix and / or length is L cs For example,

[0171] in, Represents a positive integer.

[0172] That is, the length of the first sequence is M / K, M / K+L cp 、M / K+L cs or M / K+L cp +L cs .

[0173] Step 2: Generate a second sequence with autocorrelation, where the length of the second sequence is related to the resource length N occupied by the pilot signal in the delay domain and the frequency domain density L of the pilot signal.

[0174] For example, to generate a length of The second series with good autocorrelation

[0175] Optionally, at least one cyclic prefix and / or at least one cyclic suffix may be added to the second sequence.

[0176] For example, add a length K to the second sequence cp The cyclic prefix and / or K cs For example, in,

[0177] That is, the length of the second sequence is N / L, N / L+K cp 、N / L+K cs or N / L+K cs +K cp .

[0178] Step 3: Calculate the Kronecker product of the first sequence and the second sequence to obtain a first delayed Doppler domain pilot signal, that is, a first DDDP.

[0179] For example, Or, S = vs, where represents the Kronecker Product.

[0180] Among them, S is the first DDDP.

[0181] Step 4: Copy (or extend) the first delayed Doppler domain pilot signal to obtain a second delayed Doppler domain pilot signal, i.e., a second DDDP, wherein, in the Doppler dimension, the second delayed Doppler domain pilot signal includes K first delayed Doppler domain pilot signals, and in the delay dimension, the second delayed Doppler domain pilot signal includes L first delayed Doppler domain pilot signals.

[0182] For example, Perform K extensions in the Doppler dimension and L extensions in the delay dimension to obtain the extended DDDP, denoted as S dup Among them, S dup This is the second DDDP.

[0183] Step 5: Generate a target delayed Doppler domain pilot signal, referred to as target DDDP, based on the second delayed Doppler domain pilot signal.

[0184] In some embodiments, the transmitting end device may directly use the second delayed Doppler domain pilot signal as the target delayed Doppler domain pilot signal. For example, if the starting position of the pilot signal in the time-frequency domain is the origin, the transmitting end device directly uses the second DDDP as the target DDDP.

[0185] In some embodiments, generating a target delayed Doppler domain pilot signal according to the second delayed Doppler domain pilot signal may include:

[0186] According to the starting position of the pilot signal in the time-frequency domain, the phase of the second delayed Doppler domain pilot signal is adjusted to generate a target delayed Doppler domain pilot signal.

[0187] For example, when the starting position of the pilot signal in the time-frequency domain is not the origin, the transmitting device may perform phase adjustment on the second DDDP according to the starting position of the pilot signal in the time-frequency domain to generate a target DDDP.

[0188] The following describes the specific implementation of adjusting the second DDDP to obtain the target DDDP in conjunction with a specific embodiment.

[0189] Method 1: Divide the second DDDP into multiple pilot signals, perform phase adjustment on the multiple pilot signals respectively, and use the multiple pilot signals after adjustment as the target DDDP.

[0190] For example, the second DDDP includes K*L pilot signals, wherein in the Doppler dimension, the second DDDP includes K pilot signals, and in the delay dimension, the second DDDP includes L pilot signals, and one pilot signal can be considered as a copy of S.

[0191] In some embodiments, the phase adjustment of the second delayed Doppler domain pilot signal according to the starting position of the pilot signal in the time-frequency domain to generate the target delayed Doppler domain pilot signal includes:

[0192] Phase adjustment is performed on each of the K*L pilot signals included in the second delayed Doppler domain pilot signal to obtain adjusted K*L pilot signals, and the target delayed Doppler domain pilot signal includes a set of the adjusted K*L pilot signals.

[0193] For example, according to the following formula, the pilot signal S among the K*L pilot signals is [k,l] Perform phase adjustment to obtain the adjusted pilot signal S′ [k,l] :

[0194]

[0195] That is,

[0196]

[0197]

[0198] …

[0199]

[0200] Where diag represents a diagonal matrix, a and b represent the starting positions of the pilot blocks in the time domain and frequency domain respectively, l = 0, 1, ..., L-1, k = 0, 1, ..., K-1, and the target DDDP includes S′ [k,l] A collection of .

[0201] Method 2: Group the second DDDP according to the Doppler dimension and the delay dimension respectively, wherein in the Doppler dimension, the second DDDP includes N groups of pilot signals, and in the delay dimension, the second DDDP includes M groups of pilot signals, and phase adjustment is performed according to the pilot signal groupings of the second DDDP in the Doppler dimension and the delay dimension to obtain the target DDDP.

[0202] In some embodiments, when the Doppler dimension is a horizontal dimension, the second DDDP can be divided into N rows along the horizontal dimension, and the N groups of pilot signals on the Doppler dimension can be considered as N rows of pilot signals, that is, a group of pilot signals on the Doppler dimension can be considered as one row of pilot signals; when the delay dimension is a vertical dimension, the second DDDP can be divided into M columns along the vertical dimension, and the M groups of pilot signals on the delay dimension can be considered as M columns of pilot signals, that is, a group of pilot signals on the delay dimension can be considered as one column of pilot signals.

[0203] The following describes the implementation method of obtaining the target DDDP according to the second DDDP in conjunction with a specific embodiment.

[0204] Method 2-1: The second DDDP is first phase-adjusted row by row and then column by column to obtain the target DDDP.

[0205] For example, the aforementioned step 5 may include:

[0206] Step 5-1: According to the starting position of the pilot signal in the time domain, perform phase adjustment on each row of the pilot signal of the second delayed Doppler domain pilot signal in the Doppler dimension to obtain a third delayed Doppler domain pilot signal.

[0207] For example, according to the following formula, the phase of each row of pilot signals of the second delayed Doppler domain pilot signal in the Doppler dimension is adjusted to obtain a third delayed Doppler domain pilot signal:

[0208]

[0209] Where i = 0, 1, ..., N-1, S dup (i,:) represents the i-th row of pilot signals in the second delayed Doppler domain pilot signal, a represents the starting position of the pilot signal in the time domain, S′ dup (i,:) represents the i-th row pilot signal in the third delayed Doppler domain pilot signal.

[0210] Step 5-2: According to the starting position of the pilot signal in the frequency domain, perform phase adjustment on each column of the pilot signal in the delay dimension of the third delayed Doppler domain pilot signal to obtain a fourth delayed Doppler domain pilot signal.

[0211] For example, according to the following formula, the phase of each column of pilot signals of the third delayed Doppler domain pilot signal in the delay dimension is adjusted to obtain a fourth delayed Doppler domain pilot signal:

[0212]

[0213] Where j = 0, 1, ..., M-1, S′ dup (:, j) represents the jth column pilot signal in the third delayed Doppler domain pilot signal, b represents the starting position of the pilot signal in the frequency domain, S″ dup (:,j) represents the j-th column pilot signal in the fourth delayed Doppler domain pilot signal.

[0214] Step 5-3: Use the fourth delayed Doppler domain pilot signal as the target delayed Doppler domain pilot signal.

[0215] Method 2-2: The second DDDP is first phase-adjusted column by column and then row by row to obtain the target DDDP.

[0216] For example, the aforementioned step 5 may include:

[0217] Step 5-1: According to the starting position of the pilot signal in the frequency domain, perform phase adjustment on each column of the pilot signal of the second delayed Doppler domain pilot signal in the delay dimension to obtain a fifth delayed Doppler domain pilot signal.

[0218] For example, according to the following formula, the phase of each column of pilot signals of the second delayed Doppler domain pilot signal in the delay dimension is adjusted to obtain a fifth delayed Doppler domain pilot signal:

[0219]

[0220] Where j = 0, 1, ..., M-1, S dup (:,j) represents the jth column pilot signal in the second delayed Doppler domain pilot signal, b represents the starting position of the pilot signal in the frequency domain, S′ dup (:, j) represents the j-th column pilot signal in the fifth delayed Doppler domain pilot signal.

[0221] Step 5-2: According to the starting position of the pilot signal in the time domain, perform phase adjustment on each row of the pilot signal of the fifth delayed Doppler domain pilot signal in the Doppler dimension to obtain a sixth delayed Doppler domain pilot signal.

[0222] For example, according to the following formula, the phase of each row of pilot signals of the fifth delayed Doppler domain pilot signal in the Doppler dimension is adjusted to obtain a sixth delayed Doppler domain pilot signal:

[0223]

[0224] Where j = 0, 1, ..., M-1, S′ dup (i,:) represents the i-th row of pilot signals in the fifth delayed Doppler domain pilot signal, a represents the starting position of the pilot signal in the time domain, S″ dup (i,:) represents the i-th row of pilot signals in the sixth delayed Doppler domain pilot signal.

[0225] Step 5-3: Use the sixth delayed Doppler domain pilot signal as the target delayed Doppler domain pilot signal.

[0226] In some embodiments of the present application, the method 700 further includes:

[0227] Performing a time-frequency domain transformation on the target delayed Doppler domain pilot signal to obtain a time-frequency domain pilot signal, namely, TFDP;

[0228] In the time-frequency domain, the TFDP and the modulation symbol of the data to be sent are mapped to the OFDM symbol to obtain the target signal, wherein the modulation symbol of the data to be sent is mapped to the resource position corresponding to the zero-value TFDP, and the pilot signal at the resource position corresponding to the non-zero-value TFDP is used as the DMRS of the modulation symbol of the data to be sent;

[0229] The target signal is sent to a receiving device.

[0230] In some embodiments, the target signal may be used as a sensing signal. For example, the sensing receiving device may transform the target signal into a delay Doppler domain to obtain a DDDP, and then perform sensing measurement based on the DDDP.

[0231] In some embodiments, for a communication receiving device, a non-zero value TFDP in a target signal can be used as a DMRS of OFDM data mapped on a zero value TFDP in a target signal, and channel estimation is performed based on the non-zero value TFDP. Therefore, in an embodiment of the present application, a communication system can also use an OFDM waveform, and a traditional time-frequency domain DMRS channel estimation method can still be used.

[0232] Therefore, in an embodiment of the present application, the perception signal and the communication signal can share time-frequency domain resources. The perception function can be implemented in the DD domain, and high-precision perception can be achieved through the periodically extended pilot signal in the DD domain. The communication function can be implemented through OFDM, and the time-frequency domain transformation signal of the DD domain pilot is used as DMRS for channel estimation. There is no need to configure the traditional OFDM DMRS, which reduces the signaling overhead and avoids the interference of the OTFS signal on the OFDM signal.

[0233] The following, combined Figure 8 , from the perspective of device interaction, describes the pilot configuration method provided by the embodiment of the present application. Figure 8 As shown, the following steps may be included:

[0234] S801: A transmitting device sends a pilot configuration to a receiving device.

[0235] Correspondingly, the receiving end device receives the pilot configuration.

[0236] For example, the transmitting device may first determine the pilot configuration, and further send the pilot configuration to the receiving device. For example, when the transmitting device and the receiving device are not co-located, the pilot configuration is sent to the receiving device. For the specific content of the pilot configuration, refer to the relevant description in method 700.

[0237] It should be understood that Figure 8The description is only made by taking the example that the sending end device of the pilot signal and the sending end device of the pilot configuration are the same device. In other embodiments, the two may also be different devices. For specific implementation, refer to the relevant description of the aforementioned embodiments, and this application does not limit this.

[0238] S811, the transmitting end device sends a target signal based on the pilot configuration.

[0239] Correspondingly, in S821, the receiving end device receives the target signal based on the pilot configuration.

[0240] In some embodiments, when it is necessary to perform perception measurement, the target signal may be used as the perception signal. For example, the receiving device may transform the target signal into a delay Doppler domain to obtain a DDDP, and then perform perception measurement based on the DDDP.

[0241] In some embodiments, when communication is required, the receiving device can use the non-zero value TFDP in the target signal as the DMRS of OFDM data mapped on the zero value TFDP in the target signal, and perform channel estimation based on the non-zero value TFDP. In this way, the communication system can also use OFDM waveforms and can still use the traditional time-frequency domain DMRS channel estimation method, which is conducive to better compatibility with existing systems.

[0242] Combination of the above Figures 7 and 8 , describes in detail the method embodiment of the present application, and the following is combined with Figures 9 to 14 , the device embodiments of the present application are described in detail. It should be understood that the device embodiments and the method embodiments correspond to each other, and similar descriptions can refer to the method embodiments.

[0243] Fig. 9 FIG. 8 is a schematic block diagram of a pilot configuration device 900 according to an embodiment of the present application. Fig. 9 As shown, the pilot configuration device 900 includes:

[0244] The processing unit 910 is configured to determine a pilot configuration, where the pilot configuration includes at least one of the following:

[0245] Resource allocation of pilot signals in the delay-Doppler domain;

[0246] Resource allocation of pilot signals in the time-frequency domain;

[0247] Sequence configuration of pilot signals;

[0248] Power configuration of the pilot signal;

[0249] The pilot configuration is used to generate a delayed Doppler domain pilot signal, the delayed Doppler domain pilot signal is used as a perception signal, and the time-frequency domain transformed signal of the delayed Doppler domain pilot signal is used as a demodulation reference signal DMRS.

[0250] In some embodiments, the resource configuration of the pilot signal in the delay Doppler domain includes at least one of the following:

[0251] The resource length M occupied by the pilot signal in the Doppler domain;

[0252] The resource length N occupied by the pilot signal in the delay domain.

[0253] In some embodiments, the resource configuration of the pilot signal in the time-frequency domain includes at least one of the following:

[0254] The starting position of the pilot signal in the time-frequency domain;

[0255] The time domain density K of the pilot signal, where K is a positive integer greater than 1;

[0256] The frequency domain density L of the pilot signal, where L is a positive integer greater than 1.

[0257] In some embodiments, the sequence configuration of the pilot signal includes at least one of the following:

[0258] The type of basic sequence used to generate the pilot signal, the generation formula of the basic sequence, and the generation parameters of the basic sequence.

[0259] In some embodiments, the power configuration of the pilot signal includes a power scaling factor of the pilot signal, where the power scaling factor is a power scaling factor of the transmission power of the pilot signal relative to the transmission power of the data signal.

[0260] In some embodiments, the processing unit 910 is further configured to:

[0261] generating a target delayed Doppler domain pilot signal according to the pilot configuration;

[0262] Performing a time-frequency domain transformation on the target delayed Doppler domain pilot signal to obtain a time-frequency domain pilot signal;

[0263] In the time-frequency domain, mapping the time-frequency domain pilot signal and the modulation symbol of the data to be sent to an orthogonal frequency division multiplexing OFDM symbol to obtain a target signal, wherein the modulation symbol of the data to be sent is mapped to the resource position corresponding to the zero value in the time-frequency domain pilot signal, and the pilot signal at the resource position corresponding to the non-zero value in the time-frequency domain pilot signal is used as the DMRS of the modulation symbol of the data to be sent;

[0264] The pilot configuration device further includes: a communication unit, configured to send the target signal to a receiving end device.

[0265] In some embodiments, the processing unit 910 is further configured to:

[0266] Generate a first sequence with autocorrelation, where the length of the first sequence is related to the resource length M occupied by the pilot signal in the Doppler domain and the time domain density K of the pilot signal;

[0267] Generate a second sequence with autocorrelation, where the length of the second sequence is related to the resource length N occupied by the pilot signal in the delay domain and the frequency domain density L of the pilot signal;

[0268] Calculating the Kronecker product of the first sequence and the second sequence to obtain a first delayed Doppler domain pilot signal;

[0269] Copying the first delayed Doppler domain pilot signal to obtain a second delayed Doppler domain pilot signal, wherein in the Doppler dimension, the second delayed Doppler domain pilot signal includes K first delayed Doppler domain pilot signals, and in the delay dimension, the second delayed Doppler domain pilot signal includes L first delayed Doppler domain pilot signals;

[0270] A target delayed Doppler domain pilot signal is generated according to the second delayed Doppler domain pilot signal.

[0271] In some embodiments, the processing unit 910 is further configured to:

[0272] using the second delayed Doppler domain pilot signal as the target delayed Doppler domain pilot signal; or

[0273] According to the starting position of the pilot signal in the time-frequency domain, the phase of the second delayed Doppler domain pilot signal is adjusted to generate the target delayed Doppler domain pilot signal.

[0274] In some embodiments, the processing unit 910 is further configured to:

[0275] Performing phase adjustment on each of the K*L pilot signals included in the second delayed Doppler domain pilot signal to obtain adjusted K*L pilot signals, wherein the target delayed Doppler domain pilot signal includes a set of the adjusted K*L pilot signals;

[0276] According to the following formula, the pilot signal S among the K*L pilot signals is [k,l] Perform phase adjustment to obtain the adjusted pilot signal S′ [k，l] :

[0277] Wherein, diag represents the focus matrix, a, b represent the starting positions of the pilot blocks in the time domain and frequency domain respectively, l = 0, 1, ..., L-1, k = 0, 1, ..., K-1.

[0278] In some embodiments, the second delayed Doppler domain pilot signal includes N groups of pilot signals in the Doppler dimension, the second delayed Doppler domain pilot signal includes M groups of pilot signals in the delay dimension, and the processing unit 910 is further configured to:

[0279] According to the starting position of the pilot signal in the time domain, phase-adjust each group of pilot signals of the second delayed Doppler domain pilot signal in the Doppler dimension to obtain a third delayed Doppler domain pilot signal;

[0280] According to the starting position of the pilot signal in the frequency domain, phase-adjust each group of pilot signals of the third delayed Doppler domain pilot signal in the delay dimension to obtain a fourth delayed Doppler domain pilot signal;

[0281] The fourth delayed Doppler domain pilot signal is used as the target delayed Doppler domain pilot signal.

[0282] In some embodiments, the processing unit 910 is further configured to:

[0283] According to the following formula, the phase of each row of pilot signals of the second delayed Doppler domain pilot signal in the Doppler dimension is adjusted to obtain the third delayed Doppler domain pilot signal:

[0284]

[0285] Where i = 0, 1, ..., N-1, S dup (i,:) represents the i-th group of pilot signals in the second delayed Doppler domain pilot signal, a represents the starting position of the pilot signal in the time domain, S′ dup (i,:) represents the i-th group of pilot signals in the third delayed Doppler domain pilot signal.

[0286] In some embodiments, the processing unit 910 is further configured to:

[0287] According to the following formula, each group of pilot signals of the third delayed Doppler domain pilot signal in the delay domain is phase adjusted to obtain a fourth delayed Doppler domain pilot signal:

[0288]

[0289] Where j = 0, 1, ..., M-1, S′ dup (:, j) represents the jth group of pilot signals in the third delayed Doppler domain pilot signal, b represents the starting position of the pilot signal in the frequency domain, S″ dup (:,j) represents the jth group of pilot signals in the fourth delayed Doppler domain pilot signal.

[0290] In some embodiments, the length of the first sequence is M / K, M / K+L cp 、M / K+L cs or M / K+L cp +L cs , where L cp is the length of the cyclic prefix in the first sequence, L cs is the length of the cyclic suffix in the first sequence;

[0291] The length of the second sequence is N / L, N / L+K cp 、N / L+K cs or N / L+K cs +K cp , where K cp is the length of the cyclic prefix in the second sequence, K cs is the length of the cyclic suffix in the second sequence.

[0292] In some embodiments, the pilot configuration device 900 further includes:

[0293] A communication unit, configured to send the pilot configuration to a receiving end device; or

[0294] The pilot configuration is forwarded to the receiving end device through other devices.

[0295] In some embodiments, the pilot configuration is sent via at least one of the following signaling:

[0296] Downlink control information DCI, media access control MAC CE, radio resource control RRC signaling.

[0297] It should be understood that the pilot configuration device 900 according to the embodiment of the present application may correspond to the transmitting end device in the method embodiment of the present application, and the above-mentioned and other operations and / or functions of each unit in the pilot configuration device 900 are respectively for implementing the corresponding processes of the transmitting end device in the aforementioned method embodiment. For the sake of brevity, they will not be repeated here.

[0298] Fig.10 FIG. 1 shows a schematic block diagram of a pilot configuration device 1000 according to an embodiment of the present application. Fig.10 As shown, the pilot configuration device 1000 includes:

[0299] The processing unit 1010 is configured to obtain a pilot configuration;

[0300] The pilot configuration includes at least one of the following:

[0301] Resource allocation of pilot signals in the delay-Doppler domain;

[0302] Resource allocation of pilot signals in the time-frequency domain;

[0303] Sequence configuration of pilot signals;

[0304] Power configuration of the pilot signal;

[0305] The delayed Doppler domain pilot signal is used as a perception signal, and the time-frequency domain transformed signal of the delayed Doppler domain pilot signal is used as a demodulation reference signal DMRS.

[0306] In some embodiments, the resource configuration of the pilot signal in the delay Doppler domain includes at least one of the following:

[0307] The resource length M occupied by the pilot signal in the Doppler domain;

[0308] The resource length N occupied by the pilot signal in the delay domain.

[0309] In some embodiments, the resource configuration of the pilot signal in the time-frequency domain includes at least one of the following:

[0310] The starting position of the pilot signal in the time-frequency domain;

[0311] The time domain density K of the pilot signal, where K is a positive integer greater than 1;

[0312] The frequency domain density L of the pilot signal, where L is a positive integer greater than 1.

[0313] In some embodiments, the sequence configuration of the pilot signal includes at least one of the following:

[0314] The type of basic sequence used to generate the pilot signal, the generation formula of the basic sequence, and the generation parameters of the basic sequence.

[0315] In some embodiments, the power configuration of the pilot signal includes a power scaling factor of the pilot signal, where the power scaling factor is a power scaling factor of the transmission power of the pilot signal relative to the transmission power of the data signal.

[0316] In some embodiments, the pilot configuration is sent via at least one of the following signaling:

[0317] Downlink control information DCI, media access control MAC CE, radio resource control RRC signaling.

[0318] In some embodiments, the communication unit 1010 is further configured to:

[0319] According to the pilot configuration, a target signal is received.

[0320] In some embodiments, the processing unit is further configured to perform a perceptual measurement based on the target signal; or

[0321] The non-zero-value pilot signal in the target signal is used as the DMRS of the data mapped on the zero-value pilot signal in the target signal, and channel estimation is performed according to the non-zero-value pilot signal.

[0322] It should be understood that the pilot configuration device 1000 according to the embodiment of the present application may correspond to the receiving device in the method embodiment of the present application, and the above-mentioned and other operations and / or functions of each unit in the pilot configuration device 1000 are respectively for implementing the corresponding processes of the receiving device in the aforementioned method embodiment, which will not be repeated here for the sake of brevity.

[0323] The pilot configuration device 900 and the pilot configuration device 1000 in the embodiment of the present application can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal, or can be other devices other than a terminal. Exemplarily, the terminal can include but is not limited to the types of the terminal 11 listed above, and other devices can be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

[0324] like Fig.11 As shown, the embodiment of the present application further provides a communication device 1100, including a processor 1101 and a memory 1102, and the memory 1102 stores a program or instruction that can be run on the processor 1101. For example, when the communication device 1100 is a transmitting end device, the program or instruction is executed by the processor 1101 to implement the steps performed by the transmitting end device in the pilot configuration method 700, and can achieve the same technical effect. When the communication device 1100 is a receiving end device, the program or instruction is executed by the processor 1101 to implement the steps performed by the receiving end device in the pilot configuration method 700, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0325] Fig.12 It is a schematic structural diagram of the chip of an embodiment of the present application. Fig.12 The chip 1200 shown includes a processor 1210, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0326] In some embodiments, Fig.12 As shown, the chip 1200 may further include a memory 1220. The processor 1210 may call and run a computer program from the memory 1220 to implement the method in the embodiment of the present application.

[0327] The memory 1220 may be a separate device independent of the processor 1210 , or may be integrated into the processor 1210 .

[0328] In some embodiments, the chip 1200 may further include an input interface 1230. The processor 1210 may control the input interface 1230 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips. Optionally, the processor 1210 may be located inside or outside the chip.

[0329] In some embodiments, the chip 1200 may further include an output interface 1240. The processor 1210 may control the output interface 1240 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips. Optionally, the processor 1210 may be located inside or outside the chip.

[0330] In some embodiments, the chip can be applied to the sending end device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the sending end device in each method of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0331] In some embodiments, the chip can be applied to the receiving device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the receiving device in each method of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0332] In some embodiments, the chip mentioned in the embodiments of the present application may also be a chip, for example, a system-level chip, a system chip, a chip system, or a system-on-chip chip.

[0333] The embodiment of the present application also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the following Figures 7 and 8 The steps in the method embodiment shown. This terminal embodiment corresponds to the above-mentioned method embodiment on the transmitting end device or receiving end device side, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to this terminal embodiment and can achieve the same technical effect. Specifically, Fig.13 A schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0334] The terminal 1300 includes but is not limited to: a radio frequency unit 1301, a network module 1302, an audio output unit 1303, an input unit 1304, a sensor 1305, a display unit 1306, a user input unit 1307, an interface unit 1308, a memory 1309 and at least some of the components of a processor 1310.

[0335] Those skilled in the art will appreciate that the terminal 1300 may also include a power source (such as a battery) for supplying power to each component, and the power source may be logically connected to the processor 1310 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Fig.13 The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0336] It should be understood that in the embodiment of the present application, the input unit 1304 may include a graphics processing unit (GPU) 13041 and a microphone 13042, and the graphics processor 13041 processes the image data of the static picture or video obtained by the image capture device (such as a camera) in the video capture mode or the image capture mode. The display unit 1306 may include a display panel 13061, and the display panel 13061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1307 includes a touch panel 13071 and at least one of other input devices 13072. The touch panel 13071 is also called a touch screen. The touch panel 13071 may include two parts: a touch detection device and a touch controller. Other input devices 13072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0337] In the embodiment of the present application, after receiving downlink data from the network side device, the RF unit 1301 can transmit the data to the processor 1310 for processing; in addition, the RF unit 1301 can send uplink data to the network side device. Generally, the RF unit 1301 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0338] The memory 1309 can be used to store software programs or instructions and various data. The memory 1309 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 1309 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 1309 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0339] The processor 1310 may include one or more processing units; optionally, the processor 1310 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 1310.

[0340] In some embodiments, the processor 1310 is used to determine a pilot configuration, where the pilot configuration is a pilot configuration that can be shared by the perception function and the communication function, which is beneficial to reducing the signaling overhead of the pilot configuration.

[0341] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the method embodiment and achieve the same or corresponding technical effect. To avoid repetition, it will not be repeated here.

[0342] The embodiment of the present application also provides a network side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the following Figures 7 and 8 Steps of the method embodiment. The network side device embodiment corresponds to the above-mentioned sending end device or receiving end device method embodiment, and each implementation process and implementation mode of the above-mentioned method embodiment can be applied to the network side device embodiment and can achieve the same technical effect.

[0343] Specifically, the embodiment of the present application also provides a network side device. Fig.14 As shown, the network side device 1400 includes: an antenna 1401, a radio frequency device 1402, a baseband device 1403, a processor 1404 and a memory 1405. The antenna 1401 is connected to the radio frequency device 1402. In the uplink direction, the radio frequency device 1402 receives information through the antenna 1401 and sends the received information to the baseband device 1403 for processing. In the downlink direction, the baseband device 1403 processes the information to be sent and sends it to the radio frequency device 1402, and the radio frequency device 1402 processes the received information and sends it out through the antenna 1401.

[0344] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 1403, which includes a baseband processor.

[0345] The baseband device 1403 may include, for example, at least one baseband board on which a plurality of chips are arranged. Fig.14 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 1405 through a bus interface to call the program in the memory 1405 to execute the network side device operations shown in the above method embodiment.

[0346] The network side device may further include a network interface 1406, which is, for example, a Common Public Radio Interface (CPRI).

[0347] Specifically, the network side device 1400 of the embodiment of the present application further includes: instructions or programs stored in the memory 1405 and executable on the processor 1404, and the processor 1404 calls the instructions or programs in the memory 1405 to execute Figures 9 and 10 The methods executed by the modules shown achieve the same technical effects, and therefore will not be described here in detail to avoid repetition.

[0348] The embodiment of the present application also provides a readable storage medium on which a program or instruction is stored. When the program or instruction is executed by a processor, the above Figures 7 and 8The various processes of the method embodiments shown in the figure can achieve the same technical effect. To avoid repetition, they are not described here. The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0349] The embodiment of the present application also provides a computer program / program product, wherein the computer program / program product is stored in a storage medium, and the computer program / program product is executed by at least one processor to implement the above Figures 7 and 8 The various processes of the method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0350] The embodiment of the present application also provides a communication system. The communication system includes a transmitting end device and a receiving end device. The transmitting end device can be used to implement the corresponding functions implemented by the transmitting end device in the above method, and the receiving end device can be used to implement the corresponding functions implemented by the receiving end device in the above method, which will not be described in detail for the sake of brevity.

[0351] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0352] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, by hardware. , but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM, / RAM, disk, CD, etc.), including a number of instructions to enable a terminal (which can be a mobile phone, computer, server, air conditioner, or network side device, etc.) or a network side device to execute the methods described in each embodiment of the present application.

[0353] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of the present application and the scope of protection of the claims, and these implementation methods are all within the protection of the present application.

Claims

1. A pilot configuration method, characterized in that: include: The transmitting end device determines a pilot configuration, where the pilot configuration includes at least one of the following: Resource allocation of pilot signals in the delay-Doppler domain; Resource allocation of pilot signals in the time-frequency domain; Sequence configuration of pilot signals; Power configuration of the pilot signal; The pilot configuration is used to generate a delayed Doppler domain pilot signal, the delayed Doppler domain pilot signal is used as a perception signal, and the time-frequency domain transformed signal of the delayed Doppler domain pilot signal is used as a demodulation reference signal DMRS.

2. The method according to claim 1, characterized in that The resource configuration of the pilot signal in the delay Doppler domain includes at least one of the following: The resource length M occupied by the pilot signal in the Doppler domain; The resource length N occupied by the pilot signal in the delay domain.

3. The method according to claim 1, characterized in that The resource configuration of the pilot signal in the time-frequency domain includes at least one of the following: The starting position of the pilot signal in the time-frequency domain; The time domain density K of the pilot signal, where K is a positive integer greater than 1; The frequency domain density L of the pilot signal, where L is a positive integer greater than 1.

4. The method according to claim 1, characterized in that The sequence configuration of the pilot signal includes at least one of the following: The type of basic sequence used to generate the pilot signal, the generation formula of the basic sequence, and the generation parameters of the basic sequence.

5. The method according to claim 1, characterized in that The power configuration of the pilot signal includes a power scaling factor of the pilot signal, where the power scaling factor is a power scaling factor of the transmission power of the pilot signal relative to the transmission power of the data signal.

6. The method according to any one of claims 1 to 5, characterized in that The method further comprises: generating a target delayed Doppler domain pilot signal according to the pilot configuration; Performing a time-frequency domain transformation on the target delayed Doppler domain pilot signal to obtain a time-frequency domain pilot signal; In the time-frequency domain, mapping the time-frequency domain pilot signal and the modulation symbol of the data to be sent to an orthogonal frequency division multiplexing OFDM symbol to obtain a target signal, wherein the modulation symbol of the data to be sent is mapped to the resource position corresponding to the zero value in the time-frequency domain pilot signal, and the pilot signal at the resource position corresponding to the non-zero value in the time-frequency domain pilot signal is used as the DMRS of the modulation symbol of the data to be sent; The target signal is sent to a receiving device.

7. The method according to claim 6, characterized in that Generating a target delayed Doppler domain pilot signal according to the pilot configuration includes: Generate a first sequence with autocorrelation, where the length of the first sequence is related to the resource length M occupied by the pilot signal in the Doppler domain and the time domain density K of the pilot signal; Generate a second sequence with autocorrelation, where the length of the second sequence is related to the resource length N occupied by the pilot signal in the delay domain and the frequency domain density L of the pilot signal; Calculating the Kronecker product of the first sequence and the second sequence to obtain a first delayed Doppler domain pilot signal; Copying the first delayed Doppler domain pilot signal to obtain a second delayed Doppler domain pilot signal, wherein in the Doppler dimension, the second delayed Doppler domain pilot signal includes K first delayed Doppler domain pilot signals, and in the delay dimension, the second delayed Doppler domain pilot signal includes L first delayed Doppler domain pilot signals; A target delayed Doppler domain pilot signal is generated according to the second delayed Doppler domain pilot signal.

8. The method according to claim 7, characterized in that The step of generating a target delayed Doppler domain pilot signal according to the second delayed Doppler domain pilot signal comprises: using the second delayed Doppler domain pilot signal as the target delayed Doppler domain pilot signal; or According to the starting position of the pilot signal in the time-frequency domain, the phase of the second delayed Doppler domain pilot signal is adjusted to generate the target delayed Doppler domain pilot signal.

9. The method according to claim 8, characterized in that The step of performing phase adjustment on the second delayed Doppler domain pilot signal according to the starting position of the pilot signal in the time-frequency domain to generate the target delayed Doppler domain pilot signal includes: Performing phase adjustment on each of the K*L pilot signals included in the second delayed Doppler domain pilot signal to obtain adjusted K*L pilot signals, wherein the target delayed Doppler domain pilot signal includes a set of the adjusted K*L pilot signals; According to the following formula, the pilot signal S among the K*L pilot signals is [k,l] Perform phase adjustment to obtain the adjusted pilot signal S′ [k,l] : Wherein, diag represents the focus matrix, a, b represent the starting positions of the pilot blocks in the time domain and frequency domain respectively, l = 0, 1, ..., L-1, k = 0, 1, ..., K-1.

10. The method according to claim 8, characterized in that The second delayed Doppler domain pilot signal includes N groups of pilot signals in the Doppler dimension, the second delayed Doppler domain pilot signal includes M groups of pilot signals in the delay dimension, and the phase adjustment of the second delayed Doppler domain pilot signal is performed according to the starting position of the pilot signal in the time-frequency domain to generate the target delayed Doppler domain pilot signal, including: According to the starting position of the pilot signal in the time domain, phase-adjust each group of pilot signals of the second delayed Doppler domain pilot signal in the Doppler dimension to obtain a third delayed Doppler domain pilot signal; According to the starting position of the pilot signal in the frequency domain, phase-adjust each group of pilot signals of the third delayed Doppler domain pilot signal in the delay dimension to obtain a fourth delayed Doppler domain pilot signal; The fourth delayed Doppler domain pilot signal is used as the target delayed Doppler domain pilot signal.

11. The method according to claim 10, characterized in that The step of performing phase adjustment on each group of pilot signals of the second delayed Doppler domain pilot signal in the Doppler dimension according to the starting position of the pilot signal in the time domain to obtain a third delayed Doppler domain pilot signal includes: According to the following formula, each group of pilot signals of the second delayed Doppler domain pilot signal in the delay dimension is phase adjusted to obtain the third delayed Doppler domain pilot signal: Where i = 0, 1, ..., N-1, S dup (i,:) represents the i-th group of pilot signals in the second delayed Doppler domain pilot signal, a represents the starting position of the pilot signal in the time domain, S′ dup (i,:) represents the i-th group of pilot signals in the third delayed Doppler domain pilot signal.

12. The method according to claim 10, characterized in that The step of performing phase adjustment on each group of pilot signals of the third delayed Doppler domain pilot signal in the Doppler dimension according to the starting position of the pilot signal in the frequency domain to obtain a fourth delayed Doppler domain pilot signal comprises: According to the following formula, each group of pilot signals of the third delayed Doppler domain pilot signal in the Doppler dimension is phase adjusted to obtain a fourth delayed Doppler domain pilot signal: Where j = 0, 1, ..., M-1, S′ dup (:, j) represents the jth group of pilot signals in the third delayed Doppler domain pilot signal, b represents the starting position of the pilot signal in the frequency domain, S″ dup (:,j) represents the jth group of pilot signals in the fourth delayed Doppler domain pilot signal.

13. The method according to claim 7, characterized in that The length of the first sequence is M / K, M / K+L cp 、M / K+L cs or M / K+L cp +L cs , where l cp is the length of the cyclic prefix in the first sequence, l cs is the length of the cyclic suffix in the first sequence; The length of the second sequence is N / L, N / L+K cp 、N / L+K cs or N / L+K cs +K cp , where K cp is the length of the cyclic prefix in the second sequence, K cs is the length of the cyclic suffix in the second sequence.

14. The method according to any one of claims 1 to 13, characterized in that The method further comprises: The transmitting end device sends the pilot configuration to the receiving end device; or The transmitting device forwards the pilot configuration to the receiving device through other devices.

15. A pilot configuration method, characterized in that: include: The receiving device obtains the pilot configuration; The pilot configuration includes at least one of the following: Resource allocation of pilot signals in the delay-Doppler domain; Resource allocation of pilot signals in the time-frequency domain; Sequence configuration of pilot signals; Power configuration of the pilot signal; The delayed Doppler domain pilot signal is used as a perception signal, and the time-frequency domain transformed signal of the delayed Doppler domain pilot signal is used as a demodulation reference signal DMRS.

16. A pilot configuration device, characterized in that: include: A processing unit is configured to determine a pilot configuration, where the pilot configuration includes at least one of the following: Resource allocation of pilot signals in the delay-Doppler domain; Resource allocation of pilot signals in the time-frequency domain; Sequence configuration of pilot signals; Power configuration of the pilot signal; The pilot configuration is used to generate a delayed Doppler domain pilot signal, the delayed Doppler domain pilot signal is used as a perception signal, and the time-frequency domain transformed signal of the delayed Doppler domain pilot signal is used as a demodulation reference signal DMRS.

17. A pilot configuration device, characterized in that: include: a processing unit, configured to obtain a pilot configuration, wherein the pilot configuration is used to generate a delayed Doppler domain pilot signal, wherein the delayed Doppler domain pilot signal is used as a perception signal, and a time-frequency domain transformed signal of the delayed Doppler domain pilot signal is used as a demodulation reference signal DMRS; The pilot configuration includes at least one of the following: Resource allocation of pilot signals in the delay-Doppler domain; Resource allocation of pilot signals in the time-frequency domain; Sequence configuration of pilot signals; Power configuration of the pilot signal.

18. A communication device, characterized in that: The method comprises a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method according to any one of claims 1 to 14, or the method according to claim 15.

19. A computer-readable storage medium, characterized in that: Used to store a computer program, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 14, or the method according to claim 15.

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