Signal transmission methods, systems, storage media and electronic devices

Abstract

This application provides a signal transmission method, system, storage medium, and electronic device, relating to the field of communication technology. The method includes: transmitting a first signal; wherein the first signal is generated based on a second signal and a third signal; the second signal is used for communication, and the third signal is used for sensing. In this way, resources can be allocated only to the first signal, and communication and sensing can be achieved by transmitting the first signal using these resources, without needing to allocate resources separately for the second and third signals, thus improving resource utilization.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a signal transmission method, system, storage medium and electronic device. Background Technology

[0002] Integrated Sensing and Communications (ISAC) is a new technology that integrates sensing and communication. By integrating sensing capabilities into a communication system, it can provide users with both communication and sensing services.

[0003] In an ISAC system, the transmitting device can send communication signals to the communication receiver to achieve communication; the transmitting device can also send sensing signals to achieve sensing of the target. Since communication signals and sensing signals are usually different types of signals, in order to avoid mutual interference, communication signals and sensing signals can currently be transmitted using time-division multiplexing or frequency-division multiplexing.

[0004] However, the resource utilization rate is low when using the above-described scheme. Summary of the Invention

[0005] This application provides a signal transmission method, system, storage medium, and electronic device, which are applied in the field of communication technology to improve resource utilization.

[0006] In a first aspect, embodiments of this application propose a signal transmission method applied to a first device, the method comprising:

[0007] Send the first signal;

[0008] The first signal is generated based on the second and third signals; the second signal is used for communication, and the third signal is used for sensing.

[0009] For example, the first device can be a network device or a terminal. The first device functions as a communication transmitter, capable of transmitting a second signal for communication, and also functions as a sensing transmitter, capable of transmitting a third signal for sensing. In this embodiment, the first device generates the first signal by fusing the second and third signals, thus eliminating the need to separately transmit the second signal for communication and the third signal for sensing. This allows resources to be allocated solely to the first signal, enabling both communication and sensing through its transmission, without the need to allocate resources separately for the second and third signals, thereby improving resource utilization.

[0010] In one possible implementation, the first signal is generated by mixing the third and fourth signals, with the fourth signal being generated based on the second signal, wherein:

[0011] The resource block used to transmit the fourth signal is the first resource block. The first resource block is a portion of the resource blocks used to transmit the first signal. The first resource block does not include the resource block used to transmit the third signal.

[0012] In this embodiment, the first resource block used for transmitting the fourth signal does not include the resource block used for transmitting the third signal. In other words, the first resource block used for transmitting the fourth signal is an idle resource block within the resource block used for transmitting the first signal. Since the fourth signal is generated based on the second signal, the above processing method allows the second signal to be embedded into the idle resource block of the third signal, successfully achieving the fusion of the two types of signals. This reduces mutual interference between the two types of signals after fusion and also enables flexible resource allocation, thereby optimizing overall resource utilization.

[0013] In one possible implementation, the first signal satisfies:

[0014] ;

[0015] in, As the first signal, As the third signal, The fourth signal, This is the preset window function.

[0016] In this implementation, the fourth signal is processed by a preset window function, which can smooth the edge transition of the fourth signal and thus reduce spectral leakage.

[0017] In one possible implementation, the first resource block satisfies:

[0018] ;

[0019] in, It is the first resource block; It is the transmission time. , It is the transmission duration of the third signal; It is the frequency of the k-th subcarrier; It is the third signal in Instantaneous frequency at any given moment; It is the frequency domain guard interval between the second and third signals.

[0020] In this implementation, by defining the value range of the first resource block, a frequency domain guard interval of a certain effective width is maintained between the subcarrier frequency occupied by the second signal and the instantaneous frequency corresponding to the third signal at each transmission moment. This ensures a certain distance between the first resource block and the resource block used to transmit the third signal, thereby reducing mutual interference between signals.

[0021] In one possible implementation, the second signal is an orthogonal frequency division multiplexing (OFDM) signal, and the third signal is a linear frequency modulated continuous wave (LFMCW) signal.

[0022] In this implementation, the OFDM signal decomposes the high-speed data stream into multiple parallel low-speed sub-data streams, which are then modulated onto multiple orthogonal subcarriers for transmission. This allows for efficient use of spectrum resources when using the OFDM signal as a second signal. Furthermore, the linear frequency modulation (LFMCW) characteristic of the LFMCW signal provides high accuracy in distance and velocity measurements. Therefore, using the LFMCW signal as a third signal can improve sensing accuracy.

[0023] In one possible implementation, the OFDM signal is obtained based on OFDM frames, which are generated based on the data to be transmitted.

[0024] In this implementation, OFDM technology divides the data to be transmitted and maps it onto multiple parallel subcarriers to form OFDM frames, which in turn generate OFDM signals for transmission. This parallel processing method improves the data transmission rate.

[0025] In one possible implementation, the OFDM frame includes pilot subcarriers and data subcarriers, with the pilot subcarriers used for channel estimation and the data subcarriers used to carry the data to be transmitted.

[0026] In this implementation, the pilot subcarrier in the OFDM frame is used for channel estimation. By comparing the received pilot signal with the original transmitted pilot signal, the receiver can accurately estimate the current channel state, thus providing accurate channel information for subsequent data transmission. The data subcarrier is responsible for carrying the data to be transmitted. OFDM signals improve spectral efficiency by distributing the high-speed data stream across multiple parallel subcarriers for transmission.

[0027] In one possible implementation, the method further includes:

[0028] Receive the fifth signal; wherein the fifth signal is the signal received by the first device after the first signal has been transmitted;

[0029] The echo signal corresponding to the third signal is determined based on the fifth signal.

[0030] In this implementation, the corresponding sensing scenario is a single-station sensing scenario, meaning the first device simultaneously functions as a sensing transmitter and a sensing receiver. After transmitting a first signal, the first device receives a fifth signal, which is the fifth signal received after the first signal has been transmitted. From this fifth signal, the echo signal corresponding to the third signal is determined. By analyzing the echo signal corresponding to the third signal, key information about the sensing target can be obtained, such as the distance between the sensing target and the first device, the speed of the sensing target, etc. In the single-station sensing scenario, the first device receives the fifth signal and determines the echo signal corresponding to the third signal from it, thereby enabling it to sense the sensing target based on the echo signal corresponding to the third signal.

[0031] In one possible implementation, determining the echo signal corresponding to the third signal based on the fifth signal includes:

[0032] The fifth signal is processed by signal separation to obtain the sixth and seventh signals; the sixth signal is the signal received by the first device after the second signal has been transmitted, and the seventh signal is the signal received by the first device after the third signal has been transmitted.

[0033] The phase error is determined based on the pilot signal corresponding to the sixth signal and the preset pilot signal;

[0034] The phase error is used to correct the phase of the seventh signal to obtain the echo signal corresponding to the third signal.

[0035] In this implementation, the fifth signal undergoes signal separation processing, decomposing it into a sixth signal (the signal received by the first device after the second signal has been transmitted) and a seventh signal (the signal received by the first device after the third signal has been transmitted). This separation operation can more clearly distinguish between the second and third signals. Then, the phase error is determined based on the pilot signal corresponding to the sixth signal and a preset pilot signal. Phase correction is then performed on the seventh signal based on the determined phase error, which can effectively improve the quality of the echo signal corresponding to the third signal, thereby reducing the impact of the phase error.

[0036] Secondly, embodiments of this application propose a signal transmission method applied to a second device, the method comprising:

[0037] Receive the fifth signal; wherein the fifth signal is the signal received by the second device after the first signal sent by the first device has been transmitted, and the first signal is generated based on the second signal and the third signal; the second signal is used for communication, and the third signal is used for sensing;

[0038] The second signal is determined based on the fifth signal.

[0039] In this implementation, the second device functions as a communication receiver. The second device receives a fifth signal, which is the signal received by the second device after the first signal sent by the first device has been transmitted. It then identifies the second signal from this signal and, by analyzing the second signal, obtains communication-related information, such as communication data, thereby enabling communication with the first device based on the second signal.

[0040] In one possible implementation, the first signal is generated by mixing the third and fourth signals, with the fourth signal being generated based on the second signal, wherein:

[0041] The resource block used to transmit the fourth signal is the first resource block. The first resource block is a portion of the resource blocks used to transmit the first signal. The first resource block does not include the resource block used to transmit the third signal.

[0042] In one possible implementation, the first signal satisfies:

[0043] ;

[0044] in, As the first signal, As the third signal, The fourth signal, This is the preset window function.

[0045] In one possible implementation, the first resource block satisfies:

[0046] ;

[0047] in, It is the first resource block; It is the transmission time. , It is the transmission duration of the third signal; It is the frequency of the k-th subcarrier; It is the third signal in Instantaneous frequency at any given moment; It is the frequency domain guard interval between the second and third signals.

[0048] In one possible implementation, the second signal is an OFDM signal and the third signal is an LFMCW signal.

[0049] In one possible implementation, the OFDM signal is obtained based on OFDM frames, which are generated based on the data to be transmitted.

[0050] In one possible implementation, the OFDM frame includes pilot subcarriers and data subcarriers, with the pilot subcarriers used for channel estimation and the data subcarriers used to carry the data to be transmitted.

[0051] In one possible implementation, determining the second signal based on the fifth signal includes:

[0052] The fifth signal is processed by signal separation to obtain the sixth and seventh signals; the sixth signal is the signal received by the second device after the second signal has been transmitted, and the seventh signal is the signal received by the second device after the third signal has been transmitted.

[0053] Based on the preset pilot signal, the linear frequency modulation rate of the third signal, and the transmission duration of the third signal, the sixth signal is processed to obtain the fourth signal;

[0054] The second signal is obtained from the fourth signal.

[0055] In this implementation, the fifth signal is separated into a sixth signal (the signal received by the second device after the second signal has been transmitted) and a seventh signal (the signal received by the second device after the third signal has been transmitted), making the second and third signals clearly distinguishable. This signal separation method facilitates subsequent processing, reduces interference between signals, and improves the accuracy of signal processing.

[0056] The sixth signal is processed based on the preset pilot signal, the linear frequency modulation rate of the third signal, and the transmission duration of the third signal to obtain the fourth signal. The preset pilot signal, as a known reference signal, provides a reference for the processing of the sixth signal; the linear frequency modulation rate and transmission duration of the third signal reflect the characteristics of the sensed signal. By combining this information to process the sixth signal, compensation can be made for the effects on the signal during transmission, thereby improving the quality of the fourth signal.

[0057] Thirdly, embodiments of this application propose a signal transmission method applied to a third device, the method comprising:

[0058] Receive the fifth signal; wherein the fifth signal is the signal received by the third device after the first signal sent by the first device has been transmitted, and the first signal is generated based on the second signal and the third signal; the second signal is used for communication, and the third signal is used for sensing;

[0059] The echo signal corresponding to the third signal is determined based on the fifth signal.

[0060] In this implementation, the corresponding sensing scenario is a dual-station sensing scenario, where the first device only functions as a sensing transmitter, while the third device functions as a sensing receiver. After the first device transmits a first signal, the third device receives a fifth signal, which is the signal received by the third device after the first signal has been transmitted. The third device then determines the echo signal corresponding to the third signal. By analyzing the echo signal corresponding to the third signal, key information about the sensing target can be obtained, such as the distance between the sensing target and the first device, the speed of the sensing target, etc. In the dual-station sensing scenario, the third device receives the fifth signal and determines the echo signal corresponding to the third signal from the fifth signal, thereby enabling it to sense the sensing target based on the echo signal corresponding to the third signal.

[0061] In one possible implementation, the first signal is generated by mixing the third and fourth signals, with the fourth signal being generated based on the second signal, wherein:

[0062] The resource block used to transmit the fourth signal is the first resource block. The first resource block is a portion of the resource blocks used to transmit the first signal. The first resource block does not include the resource block used to transmit the third signal.

[0063] In one possible implementation, the first signal satisfies:

[0064] ;

[0065] in, As the first signal, As the third signal, The fourth signal, This is the preset window function.

[0066] In one possible implementation, the first resource block satisfies:

[0067] ;

[0068] in, It is the first resource block; It is the transmission time. , It is the transmission duration of the third signal; It is the frequency of the k-th subcarrier; It is the third signal in Instantaneous frequency at any given moment; It is the frequency domain guard interval between the second and third signals.

[0069] In one possible implementation, the second signal is an OFDM signal and the third signal is an LFMCW signal.

[0070] In one possible implementation, the OFDM signal is obtained based on OFDM frames, which are generated based on the data to be transmitted.

[0071] In one possible implementation, the OFDM frame includes pilot subcarriers and data subcarriers, with the pilot subcarriers used for channel estimation and the data subcarriers used to carry the data to be transmitted.

[0072] In one possible implementation, determining the echo signal corresponding to the third signal based on the fifth signal includes:

[0073] The fifth signal is processed by signal separation to obtain the sixth and seventh signals; the sixth signal is the signal received by the third device after the second signal has been transmitted, and the seventh signal is the signal received by the third device after the third signal has been transmitted.

[0074] The phase error is determined based on the pilot signal corresponding to the sixth signal and the preset pilot signal;

[0075] The phase error is used to correct the phase of the seventh signal to obtain the echo signal corresponding to the third signal.

[0076] In this implementation, the phase error is determined by comparing the pilot signal corresponding to the sixth signal with a preset pilot signal. This pilot signal comparison method can identify phase changes caused by various factors (such as multipath propagation) during signal transmission, providing an accurate basis for phase correction. Phase correction of the seventh signal based on the determined phase error can compensate for the phase deviation of the echo signal corresponding to the third signal during transmission, improving the quality and accuracy of the echo signal.

[0077] Fourthly, embodiments of this application provide an electronic device including a processor and a memory, the memory for storing code instructions, and the processor for running the code instructions to perform the methods described in any of the possible implementations of the first to third aspects.

[0078] Fifthly, embodiments of this application provide a processor, including: an input circuit, an output circuit, and a processing circuit. The processing circuit is used to receive signals through the input circuit and transmit signals through the output circuit, causing the processor to execute the method in any of the possible implementations of the first to third aspects described above.

[0079] In specific implementation, the processor can be one or more chips, the input circuit can be input pins, the output circuit can be output pins, and the processing circuit can be transistors, gate circuits, flip-flops, and various logic circuits. The input signal received by the input circuit can be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit can be, for example, but not limited to, output to and transmitted by a transmitter. Furthermore, the input circuit and the output circuit can be the same circuit, which is used as both the input circuit and the output circuit at different times. This application does not limit the specific implementation of the processor and various circuits.

[0080] Sixthly, embodiments of this application provide a computer program product, which includes a computer program (also referred to as code or instructions) that, when run, causes a computer to perform the method in any of the possible implementations of the first to third aspects described above.

[0081] In a seventh aspect, embodiments of this application provide a computer-readable storage medium storing a computer program (also referred to as code or instructions) that, when run on a computer, causes the computer to perform the method in any of the possible implementations of the first to third aspects described above.

[0082] Eighthly, embodiments of this application provide a chip system applied to an electronic device. The chip system includes one or more processors, which are used to invoke computer instructions to cause the electronic device to perform the method in any of the possible implementations of the first to third aspects described above.

[0083] Ninthly, embodiments of this application provide a communication system including the aforementioned first device, second device, and third device.

[0084] It should be understood that the second to ninth aspects of this application correspond to the technical solutions of the first aspect of this application, and can be referred to the relevant description of the first aspect above, which will not be repeated here. Attached Figure Description

[0085] Figure 1 This is a schematic diagram of the architecture of a communication system applicable to the communication method provided in this application;

[0086] Figure 2 Schematic diagram of the ISAC scenario provided in the embodiments of this application Figure 1 ;

[0087] Figure 3 Schematic diagram of the ISAC scenario provided in the embodiments of this application Figure 2 ;

[0088] Figure 4 A flowchart illustrating a signal transmission method provided in this application embodiment. Figure 1 ;

[0089] Figure 5 A schematic diagram of signal transmission provided for an embodiment of this application;

[0090] Figure 6 A schematic diagram for representing a signal resource block provided in an embodiment of this application;

[0091] Figure 7 A schematic diagram for representing a signal waveform is provided as an embodiment of this application;

[0092] Figure 8 A schematic diagram of a resource block provided in an embodiment of this application;

[0093] Figure 9 The signal processing flow provided in the embodiments of this application Figure 1 ;

[0094] Figure 10 The signal processing flow provided in the embodiments of this application Figure 2 ;

[0095] Figure 11 This is a schematic block diagram of the communication device provided in the embodiments of this application;

[0096] Figure 12 This is another schematic block diagram of the communication device 1200 provided in the embodiments of this application. Detailed Implementation

[0097] To facilitate a clear description of the technical solutions in the embodiments of this application, some terms and technologies involved in the embodiments of this application will be briefly introduced below:

[0098] 1. OFDM / OFDM signal / OFDM waveform

[0099] OFDM is a multi-carrier modulation technique that divides a channel into multiple orthogonal sub-channels. This allows a high-speed data stream to be split into multiple low-speed parallel data streams, which are then modulated onto each sub-channel for transmission. Because the subcarriers are orthogonal, they can be distinguished at the receiver, effectively combating channel interference and improving spectrum utilization.

[0100] OFDM signal is a signal type that refers to an OFDM entity described from the perspective of the time domain or the frequency domain. From the time domain perspective, an OFDM signal is the superposition of all modulated subcarriers in the time domain; from the frequency domain perspective, an OFDM signal consists of a large number of closely arranged subcarriers with overlapping spectra, each of which can be modulated independently.

[0101] OFDM waveforms are used to describe the structural characteristics of OFDM signals in the time domain. They mainly include the effective data portion and the cyclic prefix. The effective data portion includes the effective information carried by the subcarrier. The cyclic prefix is ​​obtained by copying the last segment of the priority data portion and adding it to the beginning. It is mainly used to reduce inter-symbol interference.

[0102] In some embodiments, technical terms such as "OFDM", "OFDM signal", and "OFDM waveform" can be used interchangeably.

[0103] 2. LFMCW / LFMCW signal / LFMCW waveform

[0104] LFMCW is a continuous wave radar modulation technology that can detect targets by transmitting continuous wave signals whose frequency changes linearly with time. It is widely used in ranging, velocity measurement, radar imaging and other fields.

[0105] LFMCW signal is a signal type referring to a signal transmitted using LFMCW technology. From the transmitting end's perspective, an LFMCW signal is a continuous wave with a linear frequency transition (from low to high or from high to low). From the receiving end's perspective, the LFMCW signal received is the echo signal obtained after the LFMCW signal transmitted by the transmitting equipment is reflected by the target. Due to the delay during signal transmission, the frequency of the signal received by the receiving end will change, and this frequency change helps in target detection.

[0106] The LFMCW waveform is used to describe the variation of the LFMCW signal in the time and frequency domains. From the time domain perspective, the LFMCW waveform is a continuous wave with constant amplitude but linear frequency variation; from the frequency domain perspective, the frequency of the LFMCW waveform changes as a clear straight line over time.

[0107] 3. ISAC

[0108] ISAC is an information processing technology based on shared hardware and software resources and collaborative information sharing. Essentially, it integrates "wireless communication" (for data transmission) and "wireless sensing" (for environmental detection) into a single system, rather than deploying communication and sensing devices independently. In this embodiment, the ISAC system avoids the communication and sensing systems each occupying their own spectrum and requiring independent hardware deployment by sharing the same frequency band, hardware platform (e.g., antenna, RF module), and signal resources, thereby effectively reducing spectrum resource waste and equipment deployment costs.

[0109] 4. Other terms

[0110] In the embodiments of this application, terms such as "first" and "second" are used to distinguish identical or similar items with substantially the same function and purpose. For example, "first chip" and "second chip" are used only to distinguish different chips and do not limit their order of execution. Those skilled in the art will understand that terms such as "first" and "second" do not limit the quantity or execution order, and that "first" and "second" do not necessarily imply that they are different.

[0111] It should be noted that, in the embodiments of this application, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design scheme described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0112] In this application embodiment, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, a--c, bc, or abc, where a, b, and c can be single or multiple.

[0113] To better understand the technical solution of this application, the communication scenarios involved in this application will be briefly described below.

[0114] The technical solutions provided in this application can be applied to various communication systems, such as: Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, sidelink (SL) communication systems, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication systems, 5th Generation (5G) mobile communication systems or new radio access technology (NR), satellite communication systems, etc. Among them, 5G mobile communication systems can include non-standalone (NSA) and / or standalone (SA) networks. The technical solutions provided in this application can also be applied to future communication systems, such as 6th Generation (6G) mobile communication systems. Satellite communication systems can be satellite communication systems integrated with 5G mobile communication systems or future communication systems, such as non-terrestrial networks (NTN), etc., and this application does not limit this.

[0115] Figure 1 This is a schematic diagram of the architecture of a communication system applicable to the communication method provided in this application. Figure 1 A schematic diagram of a possible, non-limiting system architecture is shown. (e.g.) Figure 1 As shown, the communication system 100 includes a radio access network (RAN) 10 and a core network (CN) 20. Optionally, the communication system 100 also includes an Internet 30. RAN 10 includes at least one RAN node (e.g., Figure 1 110a and 110b, collectively referred to as 110) and at least one terminal (such as Figure 1 RAN 10, denoted as RAN 120a-120j, is collectively referred to as RAN 120. RAN 10 may also include other RAN nodes, such as wireless relay equipment and / or wireless backhaul equipment. Figure 1(Not shown in the image). Terminal 120 is connected to RAN node 110 wirelessly. RAN node 110 is connected to core network 20 wirelessly or via wired connection. The core network equipment in core network 20 and RAN node 110 in RAN 10 can be different physical devices, or they can be the same physical device integrating core network logical functions and radio access network logical functions.

[0116] RAN 10 can be a cellular system related to the 3rd Generation Partnership Project (3GPP), such as 4G, 5G mobile communication systems, or future-oriented evolution systems. RAN 10 can also be an open access network (O-RAN or ORAN), a cloud radio access network (CRAN), or a wireless fidelity (Wi-Fi) system. RAN 10 can also be a communication system that integrates two or more of the above systems.

[0117] RAN node 110, sometimes also referred to as access network equipment, network equipment, RAN entity, or access node, is part of the communication system and is used to help terminals achieve wireless access. Multiple RAN nodes 110 in communication system 100 can be of the same type or different types. In some scenarios, the roles of RAN node 110 and terminal 120 are relative, for example... Figure 1 Network element 120i can be a helicopter or a drone, and it can be configured as a mobile base station. For communication devices 120j that access RAN 10 via network element 120i, network element 120i is a base station; however, for base station 110a, network element 120i is a terminal. RAN node 110 and terminal 120 are sometimes both referred to as communication devices, for example... Figure 1 Network elements 110a and 110b can be understood as communication devices with base station functions, while network elements 120a-120j can be understood as communication devices with terminal functions.

[0118] In one possible scenario, a RAN node can be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next-generation NodeB (gNB), a next-generation base station in a 6G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc. A RAN node can also be a macro base station (such as...) Figure 1 110a), micro base stations or indoor stations (such as Figure 1 In satellite communication systems, RAN nodes can be servers, wearable devices, vehicles, or onboard equipment. For example, in vehicle-to-everything (V2X) technology, the access network equipment can be a roadside unit (RSU). In satellite communication systems, RAN nodes can be satellites or base station equipment mounted on satellites. RAN nodes in satellite communication can also be satellite communication terminals, such as portable stations, fixed stations, vehicle-mounted or airborne satellite communication terminals. It should be understood that satellite communication terminals communicate with satellites and can act as micro base stations to further provide data interfaces to accessed user equipment.

[0119] In another possible scenario, multiple RAN nodes collaborate to assist the terminal in achieving wireless access, with different RAN nodes each implementing a portion of the base station's functions. For example, RAN nodes can be central units (CUs), distributed units (DUs), CU-control plane (CPs), CU-user plane (UPs), or radio units (RUs), etc. CUs and DUs can be set up separately or included in the same network element, such as a baseband unit (BBU). RUs can be included in radio frequency equipment or radio frequency units, such as remote radio units (RRUs), active antenna units (AAUs), or remote radio heads (RRHs).

[0120] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an ORAN system, CU can also be called O-CU (open CU), DU can also be called O-DU, CU-CP can also be called O-CU-CP, CU-UP can also be called O-CU-UP, and RU can also be called O-RU. For ease of description, this application uses CU, CU-CP, CU-UP, DU, and RU as examples. Any of the units among CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented through software modules, hardware modules, or a combination of software modules and hardware modules.

[0121] A terminal can also be called a terminal device, user equipment (UE), mobile station, mobile terminal, etc. Terminals can be widely used in various scenarios, such as device-to-device (D2D), satellite communication (e.g., NTN), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, etc. Terminals can be mobile phones, tablets, computers with wireless transceiver capabilities, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, etc.

[0122] In the embodiments of this application, the terminal and network device can be hardware devices, or software functions running on dedicated hardware, or software functions running on general-purpose hardware, such as virtualization functions instantiated on a platform (e.g., cloud platform), or entities that include dedicated or general-purpose hardware devices and software functions. This application does not limit the specific form of the terminal and network device.

[0123] Current 5G-Advanced network designs primarily focus on data transmission, and the radio channel model defined to cover frequencies up to 100 GHz is developed based on this. While supporting location based on radio access technology (RAT), the specification does not provide built-in functionality for detecting objects not connected to the network. If sensing capabilities are integrated into the system design, sensing can be provided as a service along with communication. Currently, 3GPP's research on ISAC is still in its early stages, and the specific workflows for ISAC's communication and sensing services are not yet determined. Therefore, it is necessary to design the compatibility of ISAC's communication and sensing functions appropriately to support the needs of different use cases.

[0124] The following is combined Figure 2 and Figure 3 Introduce the scenarios for ISAC.

[0125] Figure 2 Schematic diagram of the ISAC scenario provided in the embodiments of this application Figure 1 ,refer to Figure 2 As shown, it can be understood as an ISAC system consisting of a first device 201, a sensing target 202, and a second device 203.

[0126] The ISAC system can provide communication services. Specifically, the first device 201 can send communication signals to the second device 203 to achieve communication between the first device 201 and the second device 203.

[0127] In some embodiments, the first device 201 may be a network device, and the second device 203 may be a terminal; or, the first device 201 may be a terminal, and the second device 203 may be a network device. Figure 2 The first device 201 is shown as a network device, and the second device 203 is shown as a terminal.

[0128] In some embodiments, the communication signal transmitted between the first device 201 and the second device 203 may be, for example, an OFDM signal.

[0129] The ISAC system can provide sensing services, Figure 2 Taking the single-station sensing scenario in the example, specifically, the first device 201 can send a sensing signal. During transmission, the sensing signal encounters the sensing target 202, resulting in phenomena such as signal reflection and scattering. Then, the sensing target 202 reflects the sensing signal, and the reflected echo signal is received by the first device 201. Based on the relevant information of the sensing signal sent by the first device 201 and the relevant information of the received echo signal, the sensing target 202 can be sensed, thereby obtaining information such as the speed and position of the sensing target 202.

[0130] In some embodiments, the first device 201 may be a network device or a terminal; the sensing target may be a stationary object, such as a building, or a moving object, such as a vehicle or a pedestrian.

[0131] In some embodiments, the sensing signal transmitted by the first device 201 may be, for example, an LFMCW signal.

[0132] Figure 3 Schematic diagram of the ISAC scenario provided in the embodiments of this application Figure 2 ,refer to Figure 3 As shown, it can be understood as an ISAC system consisting of a first device 301, a sensing target 302, a second device 303, and a third device 304.

[0133] The ISAC system can provide communication services. Specifically, the first device 301 can send communication signals to the second device 303, thereby enabling communication between the first device 301 and the second device 303. This process can be found in [reference needed]. Figure 2 The relevant content in the embodiments will not be repeated here.

[0134] The ISAC system can provide sensing services, Figure 3 Taking the dual-station sensing scenario in the example, specifically, the first device 301 can send a sensing signal. During transmission, the sensing signal encounters the sensing target 302, resulting in phenomena such as signal reflection and scattering. Then, the sensing target 302 reflects the sensing signal, and the reflected echo signal is received by the third device 304. Based on the relevant information of the sensing signal sent by the first device 301 and the relevant information of the echo signal received by the third device 304, the sensing target 302 can be sensed, thereby obtaining information such as the speed and position of the sensing target 302.

[0135] In some embodiments, the first device 301 may be a network device or a terminal; the third device 304 may be a network device or a terminal; the sensing target may be a stationary object, such as a building, or a moving object, such as a vehicle or a pedestrian.

[0136] In some embodiments, the sensing signal transmitted by the first device 301 may be, for example, an LFMCW signal.

[0137] based on Figure 2 and Figure 3 As the examples show, in current ISAC systems, communication signals and sensing signals are usually different types of signals. For example, communication signals can use OFDM signals, which are the mainstream waveform for 5G NR and have high spectral efficiency and flexible scheduling capabilities; sensing signals can use LFMCW signals, which are commonly used waveforms in high-precision radar and are widely used for distance and speed measurements.

[0138] In the ISAC system, both communication and sensing services need to be implemented. Since the signals used for communication and sensing have different functions and types, in order to avoid mutual interference, the two types of signals can currently be transmitted using frequency domain or time domain separation.

[0139] Frequency domain separation, also known as frequency division multiplexing (FDM), allows network devices to allocate different frequency domain resources to two types of signals, meaning these signals are transmitted on different frequency domains. Specifically, independent and non-overlapping frequency bands can be allocated to communication signals and sensing signals, distinguishing them in the frequency domain. For example, lower frequency bands can be allocated to OFDM signals for communication, while higher frequency bands can be allocated to LFMCW signals for sensing. In this way, the two types of signals operate on their respective independent frequency bands without interfering with each other.

[0140] Temporal separation, also known as time-division multiplexing, allows network devices to allocate different temporal resources to these two types of signals. In other words, these two types of signals are transmitted on different temporal resources. Specifically, different time periods can be allocated to communication signals and sensing signals, thus distinguishing the two types of signals in the temporal dimension. For example, during one time period, the communication system is in operation, transmitting communication data; while during another time period, the sensing system is in operation, detecting and identifying targets.

[0141] However, the above implementation requires separating communication signals and sensing signals in the time / frequency domain, making it difficult to achieve resource sharing and resulting in low resource utilization.

[0142] In view of this, embodiments of this application provide a signal transmission method in which a first signal is generated by fusing a second signal used for communication and a third signal used for sensing. Communication and sensing can be achieved by sending the first signal. The solution of this application embodiment does not require the allocation of resources for the second and third signals separately, nor does it require resource separation between the second and third signals, thereby improving resource utilization.

[0143] The technical solutions of the embodiments of this application and how the technical solutions of the embodiments of this application solve the above-mentioned technical problems will be described in detail below with reference to the accompanying drawings and specific examples. The following specific embodiments can be implemented independently or in combination with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0144] First, combine Figure 4 The signal transmission method provided in the embodiments of this application will be described, wherein, Figure 4 A flowchart illustrating a signal transmission method provided in this application embodiment. Figure 1 .

[0145] like Figure 4 As shown, the method includes:

[0146] S401. The first device sends a first signal, wherein the first signal is generated based on the second signal and the third signal.

[0147] like Figure 4 As shown, it can be understood that the first device in the embodiments of this application may be, for example, a transmitting device of a first signal, responsible for generating and transmitting a first signal based on a specific signal source (e.g., a second signal and a third signal).

[0148] In some embodiments, the first device may be, for example, a network device, a terminal, a radar, etc.

[0149] In some embodiments, the first device integrates the functions of both a communication transmitter and a sensing transmitter, wherein:

[0150] The communication transmitter is responsible for processing communication-related signals, transforming the second signal into a form that meets the data transmission requirements of the communication system. For example, the transmitter can encode and modulate the second signal, loading the corresponding data onto a carrier wave to achieve efficient data transmission over the wireless channel. The second signal can be, for example, a signal used to implement communication functions such as data transmission. Exemplarily, the second signal can be an OFDM signal, a single-carrier signal, or a multi-carrier signal, etc.

[0151] The sensing transmitter is responsible for processing relevant signals, transforming the third signal into a signal with sensing capabilities. For example, the third signal could be used for target detection or environmental awareness; after processing, the sensing transmitter can generate signals for acquiring information such as target position and velocity. For instance, the third signal could be an LFMCW signal, a pulse signal, or something similar.

[0152] In some embodiments, the first device may first generate a second signal and a third signal, and then fuse the second signal and the third signal to obtain a first signal. For example, the first device may embed the second signal into the idle resources of the third signal to obtain the first signal.

[0153] In the context of communication services, after a first device generates a first signal, it sends the first signal. Correspondingly, a second device receives a fifth signal, which is the signal received by the second device after the first signal sent by the first device has been transmitted. Because the first signal is affected by factors such as channel conditions during transmission, the fifth signal received by the second device is not entirely the same as the first signal sent by the first device.

[0154] In some embodiments, after receiving the fifth signal, the second device separates the fifth signal, recovers the second signal from the separated signal, and performs subsequent processing based on the second signal.

[0155] For sensing services, after the first device generates a first signal, it sends the first signal. During transmission, the first signal encounters the sensing target, resulting in reflection and scattering, and is reflected to obtain a fifth signal. If the sensing scenario is a single-site sensing scenario, the first device receives the fifth signal, which is the signal received by the first device after the first signal it sent has been transmitted. If the sensing scenario is a two-site sensing scenario, the third device receives the fifth signal, which is the signal received by the third device after the first signal it sent has been transmitted. Because the first signal is affected by channel conditions and other factors during transmission, the fifth signal received by the first / third device is not exactly the same as the first signal sent by the first device.

[0156] In some embodiments, after receiving the fifth signal, the first device / third device will separate the fifth signal, determine the echo signal corresponding to the third signal from the separated signals, and perform subsequent processing based on the echo signal corresponding to the third signal to realize the perception of the target.

[0157] In this embodiment, the first device generates the first signal by fusing the second and third signals, thus eliminating the need to separately transmit the second signal for communication and the third signal for sensing. This allows resources to be allocated solely to the first signal, enabling both communication and sensing through its transmission, without the need to allocate resources separately for the second and third signals, thereby improving resource utilization.

[0158] In some embodiments, the first signal is generated by mixing the third signal and the fourth signal, and the fourth signal is generated based on the second signal, wherein: the resource block used to transmit the fourth signal is the first resource block, the first resource block is a portion of the resource block used to transmit the first signal, and the first resource block does not include the resource block used to transmit the third signal.

[0159] The following is combined Figure 5 The process of signal transmission will be introduced.

[0160] Figure 5 A schematic diagram of signal transmission provided in an embodiment of this application, such as... Figure 5 As shown, after generating the second signal, the first device needs to generate a fourth signal based on the second signal (in... Figure 5 China and Israel (This is represented as a sequence of steps), and then windowing is applied to the fourth signal to obtain the windowed fourth signal. Figure 5 In the example, windowing is based on a preset window function. It was achieved.

[0161] The first device generates the third signal (in Figure 5 China and Israel After (representation), the third signal and the windowed fourth signal are superimposed to obtain the first signal (in). Figure 5 China and Israel express).

[0162] In some embodiments, the first signal satisfies:

[0163] (1)

[0164] in, As the first signal, As the third signal, The fourth signal, This is the preset window function.

[0165] like Figure 5 As shown, after receiving the first signal, the first signal can be transmitted. Specifically, the first device can perform carrier modulation on the first signal based on a carrier wave to obtain a carrier-modulated signal (in... Figure 5 China and Israel (This indicates that the signal is transmitted), and the carrier-modulated signal is sent.

[0166] The first resource block is a portion of the resource blocks used to transmit the first signal. The first resource block does not include a resource block used to transmit the third signal. Therefore, through the above processing, the second signal is embedded into a free resource block within the third signal. For example, the second signal can be an OFDM signal, and the third signal can be an LFMCW signal.

[0167] The process of generating the second signal using OFDM as an example is described below.

[0168] In some embodiments, the process of the first device generating an OFDM signal may include the following steps:

[0169] Step 1: Perform channel coding and modulation mapping on the data to be transmitted.

[0170] If communication is required between the first device and the second device, the first device needs to send data to the second device. For the data to be sent, the first device converts the data into a raw binary bit stream and then performs channel coding on it to obtain the encoded bit stream.

[0171] Then, the first device can group the encoded bitstream and map each group of bitstreams according to a preset constellation diagram to obtain the corresponding data symbols. Through the above processing, the encoded bitstream can be converted into a data symbol stream, which includes multiple data symbols. Each data symbol is a complex number representing the amplitude and phase information of the wireless carrier.

[0172] Step 2, Subcarrier Mapping

[0173] The first device can generate a blank array of length N, where each position in the array corresponds to a subcarrier, and N is a positive integer.

[0174] In the subcarrier resource allocation process, the total number of subcarriers N for the OFDM symbol is first determined, and then functionally divided into Q data subcarriers (corresponding to index set D) and P pilot subcarriers (corresponding to index set P) (satisfying P=NQ). The pilot subcarriers are used for subsequent channel estimation and synchronization correction, while the data subcarriers carry the data to be transmitted. The first device can place the data symbol stream obtained in step 1 into the corresponding positions of the data subcarriers and place the pilot data into the corresponding positions of the pilot subcarriers, thereby obtaining the OFDM symbol.

[0175] In some embodiments, OFDM notation is:

[0176] (2)

[0177] in, For OFDM symbols, P is the index set of pilot subcarriers, D is the index set of data subcarriers, and C is the data constellation point set.

[0178] An OFDM symbol describes the amplitude and initial phase at which N subcarriers should begin oscillating within one OFDM symbol time.

[0179] Step 3: N-point Inverse Fast Fourier Transform (IFFT)

[0180] After obtaining the OFDM symbols, time-frequency domain transformation can be performed, such as an N-point IFFT transform.

[0181] Specifically, after obtaining the frequency domain OFDM symbols Since actual wireless channel transmission is performed in the form of time-domain signals, it is also necessary to convert the frequency-domain signals into time-domain signals through IFFT transformation so that they can be transmitted over the wireless channel.

[0182] Based on the description of steps 1-3 above, it can be determined that the frequency domain OFDM symbol... It consists of N subcarriers, each subcarrier corresponding to a frequency domain sample value. Therefore, for a frequency domain symbol containing N sample values... By performing an N-point IFFT transform, the complex baseband time-domain symbol of the OFDM symbol can be obtained, as shown in the following equation (3):

[0183] (3)

[0184] in, The complex baseband time-domain symbol of the k-th OFDM symbol obtained after N-point IFFT transformation is obtained by connecting the complex baseband time-domain symbols of multiple OFDM symbols in chronological order. This represents the duration of the complex baseband time-domain symbol of the k-th OFDM symbol; This represents the bandwidth of the k-th subcarrier. Where B represents the total bandwidth and N represents N subcarriers; In this context, k represents the k-th time-domain OFDM symbol.

[0185] Step 4: Adding a cyclic prefix

[0186] To address inter-symbol interference caused by multipath channels, a cyclic prefix (CP) of a preset length is added to the time-domain symbol obtained after IFFT transformation. In other words, a portion of the signal at the end of the time-domain symbol is copied to the beginning to form a time-domain OFDM symbol with a CP.

[0187] Step 5: Analog Signal Generation

[0188] After the CP is added, the time-domain OFDM symbols are first connected to form an OFDM frame. Then, the OFDM frame is converted into a digital-to-analog converter (DAC) to convert the digital signal into an analog signal, so that the generated analog signal can be transmitted in the actual wireless channel.

[0189] The process of generating the second signal by the first device has been described in the above embodiments. Next, the process of generating the third signal will be described.

[0190] In a possible implementation, the generation process of the third signal can be achieved through four core steps: "bandwidth division, parameter setting, duration determination, and signal generation," as detailed below:

[0191] Step 1: Frequency Band Division

[0192] In the frequency band allocation process, the LFMCW signal is first directly divided into M equal frequency bands in the frequency domain. This frequency band allocation method provides a foundation for subsequent signal processing and resource allocation. Specifically, by dividing the frequency band used to transmit the LFMCW signal into multiple frequency bands, each frequency band can be processed and utilized more flexibly. For example, in the subsequent fusion process with OFDM signals, the compatibility of the two frequency bands can be effectively improved, thereby better realizing spectrum resource integration.

[0193] Step 2: Parameter Setting

[0194] During parameter setting, considering practical application scenarios, such as long-distance or high-noise environments, it is necessary to maintain the detectability of the LFMCW signal while minimizing power consumption and electromagnetic interference. Therefore, the signal amplitude needs to be set to keep the LFMCW signal strength within a reasonable range.

[0195] In addition, the initial frequency of the LFMCW signal also needs to be set. Since different initial frequencies may affect the detection sensitivity and resolution of the target, setting an appropriate initial frequency can effectively improve the signal sensing accuracy.

[0196] Furthermore, the linear frequency modulation rate is also a key factor affecting the characteristics of LFMCW signals, as it determines the rate at which the signal frequency changes over time. For example, setting a higher linear frequency modulation rate allows the signal to cover a wider frequency range in a shorter time, thereby enabling more accurate measurement of the target's distance.

[0197] Step 3: Determine the duration

[0198] During the process of determining the duration, the duration of the LFMCW signal (assuming it is used) (This can be represented, for example, by determining the resolution required for perception.)

[0199] For example, the LFMCW signal is used to determine the velocity of the sensed target, so the duration of the LFMCW signal can be determined based on the required velocity resolution, as shown in Equation (4) below:

[0200] (4)

[0201] in, The wavelength is a constant. It is the speed resolution required to achieve perception, and its value can be adjusted according to actual needs.

[0202] Step 4: Generate signal

[0203] After completing the frequency band division, parameter setting, and duration determination, the baseband LFMCW signal, also known as the third signal, is generated based on these parameters. The construction formula for the third signal can be expressed as:

[0204] (5)

[0205] in, This represents the baseband LFMCW signal value at time t; Indicates the amplitude of the LFMCW signal; Indicates the initial frequency; 'a' represents the linear frequency modulation rate. Indicates duration.

[0206] The process of generating the second and third signals has been described above. Next, the process of mixing the second and third signals to obtain the first signal will be described.

[0207] Figure 6 A schematic diagram for representing a signal resource block is provided in an embodiment of this application, such as... Figure 6 As shown, this can be understood as OFDM resource blocks divided in the time-frequency domain. The vertical axis in the figure represents frequency, and the labels are... 0 This indicates that the frequency of the OFDM signal starts from... Change to It includes M frequency bands. The horizontal axis represents time, including k OFDM symbols. Figure 6 In this diagram, each small square represents a resource block, and each resource block corresponds to time-domain resources and frequency-domain resources. Figure 6 All the small squares in the example form a resource block used to transmit the first signal.

[0208] Firstly, the construction formula for the third signal can be used to understand the complex field part. This represents the phase and determines the frequency variation of the signal. The complex field portion is then applied to the variable... Differentiation yields: Substituting this derivative result into the instantaneous frequency formula, we obtain... .in, This indicates the instantaneous frequency corresponding to the waveform of the LFMCW signal.

[0209] To more intuitively understand the changes in the LFMCW signal waveform, the following will combine... Figure 7 To provide further explanation, among which, Figure 7 This is a schematic diagram for representing a signal waveform, provided as an embodiment of this application.

[0210] Based on the instantaneous frequency formula It is possible to obtain, such as Figure 7 The waveform shown is understandable. It is a straight line that changes linearly with time, reflecting the linear change of signal frequency over time. For example, as shown in the figure, the horizontal axis represents time, with time nodes labeled 0, T, 2T, 3T, 4T, etc., from left to right, representing the duration of the signal. The vertical axis represents frequency, labeled... 0 , representing the frequency and sign of the signal.

[0211] Combination Figure 6and Figure 7 As can be seen, the resource block used to transmit the third signal only occupies a portion of the resource block used to transmit the first signal. In other words, there are idle resource blocks for the third signal. Therefore, it is possible to consider embedding the second signal into the idle resource block of the third signal to achieve the fusion of the second and third signals. This process will be described below.

[0212] In some embodiments, the first device may determine a first resource block based on a resource block for transmitting a third signal and a resource block for transmitting a first signal, wherein the first resource block is a portion of the resource block for transmitting the first signal, and the first resource block does not include the resource block for transmitting the third signal.

[0213] In some embodiments, the first resource block satisfies:

[0214] (6)

[0215] in, It is the first resource block; It is the transmission time. , It is the transmission duration of the third signal; It is the frequency of the k-th subcarrier; It is the third signal in Instantaneous frequency at any given moment; It is the frequency domain guard interval between the second and third signals.

[0216] Figure 8 A schematic diagram of a resource block provided in an embodiment of this application, as shown below. Figure 8 The example illustrates the resource block occupied by the third signal, and the frequency domain guard interval between the second and third signals (corresponding to...). Figure 8 (The white area in the middle). This frequency domain guard interval can also be understood as the frequency of the subcarrier of the OFDM signal. Cannot be included in Centered on the instantaneous frequency corresponding to the time, the width is The interval. In this way, by constraining the subcarrier frequency of the second signal, interference between signals can be avoided.

[0217] In some embodiments, The width should meet the following requirements: In other words, the frequency domain guard interval. The value should be greater than or equal to . This represents the main energy bandwidth of the LFMCW signal, and its value is a positive number. This indicates the subcarrier spacing of the OFDM signal.

[0218] After determining the first resource block, the second signal (i.e., the OFDM signal) can be rewritten to obtain the fourth signal. This fourth signal is generated based on the rewritten second signal, and its construction formula can be expressed as:

[0219] (7)

[0220] in, The frequency of the k-th subcarrier is represented by t, which is the embedding time interval from 0 to MT. This is the first resource block, used to transmit the fourth signal and represent the value range corresponding to the subcarrier of the fourth signal. It should be noted that the first resource block is a portion of the resource blocks used for transmitting OFDM signals; it does not include the resource blocks used for transmitting LFMCW signals.

[0221] After completing the rewriting of the second signal and obtaining the fourth signal, the third signal and the fourth signal can be mixed to obtain the mixed baseband signal.

[0222] In possible implementations, the third and fourth signals can be processed as follows:

[0223] (8)

[0224] in, As the first signal, As the third signal, The fourth signal, This is the preset window function.

[0225] After receiving the first signal, the first device can send the first signal. Specifically, the first signal obtained through the above-mentioned mixing process... Since it is a low-frequency signal, in order for the first signal to be transmitted in the wireless channel, the baseband signal also needs to be carrier modulated.

[0226] In possible implementations, for the first signal The process of carrier modulation can be seen in the following equation (9):

[0227] (9)

[0228] in, Indicates the carrier frequency; This is the first signal; This is the signal after carrier modulation of the first signal.

[0229] The first device was obtained Then, send Accordingly, the receiving device receives the signal sent by the first device. The receiving device may include a second device and the first device (for a single-site sensing scenario), or it may include a second device and a third device (for a dual-site sensing scenario). Since the first signal sent by the first device may change due to factors such as channel conditions or target reflection, the signal received by the receiving device (i.e., the fifth signal) may differ from the first signal sent by the first device.

[0230] The following is combined Figure 9 This describes the process by which the second device processes the fifth signal after receiving it. Figure 9 The signal processing flow provided in the embodiments of this application Figure 1 ,like Figure 9 As shown, it includes:

[0231] S901 performs signal separation processing on the fifth signal to obtain the sixth and seventh signals.

[0232] Since the received signal frequency is usually high, a down-conversion operation is required for easier subsequent processing. The RF front-end of the receiving device mixes the received signal with a specific frequency signal generated by a local oscillator, converting the received signal from the high-frequency band to the intermediate-frequency band.

[0233] The down-converted signal is an analog signal, so it needs to be converted into a digital signal by an analog-to-digital converter (ADC) before it can be further processed in the digital signal processing (DSP) module. The implementation of this process can be understood by referring to relevant technologies; it will not be explained in detail here.

[0234] Then, the converted digital signal is decoded according to the preset communication encoding rules to obtain the decoded mixed waveform.

[0235] Subsequently, the decoded mixed waveform is subjected to signal separation processing to obtain the sixth and seventh signals. The sixth signal is the signal received by the second device after the second signal has been transmitted, and the type of the second signal is the same as that of the sixth signal. The seventh signal is the signal received by the second device after the third signal has been transmitted, and the type of the seventh signal is the same as that of the third signal.

[0236] In some embodiments, the fifth signal can be separated based on a resource block used for transmitting the third signal and a first resource block used for transmitting the fourth signal. Since the resource block used for transmitting the third signal and the first resource block are different, the second device can separate the seventh signal from the resource block used for transmitting the third signal and the sixth signal from the first resource block.

[0237] S902, based on the preset pilot signal, the linear frequency modulation rate of the third signal, and the transmission duration of the third signal, the sixth signal is processed to obtain the fourth signal.

[0238] In this embodiment, the sixth signal is an OFDM signal and the seventh signal is an LFMCW signal, which will be used as examples for illustration.

[0239] After obtaining the sixth and seventh signals, the pilot signal introduced by the OFDM part of the sixth signal and the backup LFMCW with the same linear frequency modulation rate and duration as the original LFMCW signal are used to assist in the synchronization information and frequency offset estimation.

[0240] Referring to the description in step S401, it can be determined that the second signal contains a pilot signal. By analyzing the pilot signal in the second signal, the second device can determine the starting position of the second signal, thereby achieving synchronization of the communication sequence corresponding to the second signal.

[0241] Meanwhile, based on the linear frequency variation of LFMCW signals over time, by comparing the received signal with the backup LFMCW signal, the synchronization information (e.g., frame synchronization) and frequency offset can be estimated more accurately. For example, by analyzing the relationship between the frequency difference between the received signal and the backup LFMCW signal over time, the frequency offset caused by factors such as channel transmission can be estimated.

[0242] After obtaining the auxiliary synchronization information and frequency offset estimation, the fourth signal can be obtained. The construction formula of the fourth signal can be found in Equation (7) above. Then, the time demultiplexing module separates the OFDM signals embedded in different time slots and extracts the OFDM signals in different time slots.

[0243] S903, the second signal is obtained based on the fourth signal.

[0244] Finally, the separated OFDM signal is restored to obtain the original second signal required by the second device. The construction formula of the second signal can be found in equation (3) above.

[0245] The following is combined Figure 10 This section describes the process by which the third device receives the fifth signal and determines the echo signal corresponding to the third signal based on the fifth signal.

[0246] Figure 10 The signal processing flow provided in the embodiments of this application Figure 2 ,like Figure 10 As shown, it includes:

[0247] S1001, perform signal separation processing on the fifth signal to obtain the sixth and seventh signals.

[0248] After receiving the fifth signal, the third device performs signal separation processing on the fifth signal to obtain the sixth and seventh signals. The sixth signal is the signal received by the third device after the second signal has been transmitted, and the seventh signal is the signal received by the third device after the third signal has been transmitted.

[0249] The process by which the third device performs signal separation processing on the fifth signal to obtain the sixth and seventh signals can be found in [reference needed]. Figure 9 The process by which the second device performs signal separation processing on the fifth signal to obtain the sixth and seventh signals in the illustrated embodiment S901 is similar and will not be described in detail here.

[0250] S1002, determine the phase error based on the pilot signal corresponding to the sixth signal and the preset pilot signal.

[0251] The third device extracts the sixth signal from the decoded mixed waveform. Since the sixth signal (which may correspond to an OFDM signal) is the signal received by the third device after the second signal has been transmitted, and a known pilot signal is inserted into the OFDM frame, the third device decodes the sixth signal to obtain the corresponding pilot signal.

[0252] Subsequently, the third device compares and analyzes the decoded pilot signal with the preset pilot signal. The preset pilot signal serves as a reference standard, and the differences between it and the actual received and decoded pilot signal are caused by interference from various factors (such as multipath effects) during signal transmission. By analyzing these differences, the third device can determine the phase error in the LFMCW signal portion caused by various factors during transmission.

[0253] S1003, perform phase correction on the seventh signal based on the phase error to obtain the echo signal corresponding to the third signal.

[0254] After determining the phase error, the third device performs phase correction on the seventh signal (e.g., corresponding to an LFMCW signal). Specifically, based on the phase error determined in S1002, the third device adjusts the phase of the LFMCW signal according to this phase error. This restores the LFMCW signal to a suitable phase state as much as possible, satisfying its requirement for phase continuity. After phase correction, the echo signal corresponding to the third signal is obtained.

[0255] After synchronizing and correcting the phase error, the third device applies inverse synthetic aperture radar (ISAR) image processing to process the echo signal (i.e., the corrected LFMCW signal). ISAR technology analyzes and processes the echo signal of the target at different angles, utilizing the Doppler frequency shift characteristics of the signal and the modulation effect of the target's geometry to construct detailed target information, such as the target's shape, size, and attitude, ultimately achieving high-precision target perception.

[0256] In this embodiment, by embedding the subcarriers of the OFDM signal into the idle time-frequency resources of the LFMCW signal and dynamically adjusting the subcarrier distribution of the OFDM signal and the frequency modulation parameters of the LFMCW, the dependence of communication and sensing functions on independent spectrum resources is solved, thereby effectively improving spectrum efficiency.

[0257] Furthermore, when OFDM subcarriers are embedded in LFMCW signals, a guard bandwidth is introduced to isolate OFDM and LFMCW signals, reducing interference between adjacent subcarriers and thus improving the accuracy and stability of sensing and communication functions.

[0258] After obtaining the first signal based on the fusion of the second and third signals, it is necessary to optimize its quality to enhance the reliability of communication and sensing functions. The optimization process for the first signal is described below, focusing on the following two aspects:

[0259] First aspect: Peak-to-average power ratio (PAPR) control.

[0260] Because OFDM signals typically have a high PAPR (Power Amplifier Reduction Rate), the power amplifier may enter the nonlinear region, causing signal distortion and affecting communication quality. Furthermore, an excessively high PAPR can also interfere with adjacent frequency bands. Therefore, processing mechanisms are needed to reduce the PAPR of OFDM signals to maintain stable operation of communication and sensing functions.

[0261] In some possible implementations, for example, during the generation of OFDM signals, the OFDM subcarriers can be optimized using algorithms such as selected mapping (SLM) and partial transmit sequence (PTS).

[0262] The SLM algorithm uses multiple phase sequences for the same information bit at the transmitting end. By calculating the peak power of the OFDM signal under different phase sequences, it selects the OFDM candidate signal with the lowest peak power for transmission. This method effectively reduces the PAPR of the signal by changing the phase combination of the signal without changing the original information content.

[0263] The PTS algorithm divides the OFDM symbol into multiple sub-blocks, each multiplied by a different phase factor. By optimizing the combination of these phase factors, the peak power of the OFDM signal is minimized. This method also optimizes the waveform shape without changing the information content, thereby reducing PAPR.

[0264] In some possible implementations, for example, a window function can be designed during the OFDM signal generation process to smooth the edges of the OFDM signal and further reduce spectral leakage, such as the window function described in step S201 of the above embodiments. By using window functions at both ends of the OFDM signal waveform, the start and end portions of the signal are gradually smoothed, avoiding sudden amplitude changes. Therefore, this method not only helps reduce interference to adjacent frequency bands but also improves the PAPR of the OFDM signal to some extent.

[0265] It should be noted that all the PAPR optimization processes described above are confined to the OFDM modulator substructure, and the preprocessing of the original modulation symbols is completed before time-domain synthesis. In this way, only the waveform morphology is optimized without altering the information content, while avoiding any impact on the LFMCW signal, thus ensuring sensing performance.

[0266] The second aspect: maintaining orthogonality.

[0267] Based on the description in the above embodiments, it can be determined that a guard interval is introduced between the OFDM signal and the LFMCW signal to avoid inter-signal interference. That is, before and after the replaced diagonal resource block (corresponding to...) Figure 8 (The white area in the middle) introduces guard subcarriers and guard time slots. Guard subcarriers, by occupying a specific position in the frequency domain, isolate the LFMCW signal from the OFDM subcarrier, reducing interference from LFMCW signal power leakage to the OFDM subcarrier. Guard time slots provide a time interval in the time domain, avoiding time overlap between the LFMCW and OFDM signals, further reducing the possibility of interference.

[0268] Furthermore, based on the description in the above embodiments, it can be understood that a sensing-communication decoupled receiving method is adopted in the sensing receiver and the communication receiver. Since the LFMCW signal has linear frequency modulation characteristics, it is easily identified and extracted from the received signal. Therefore, the LFMCW region is first detected, and its signal is used to synchronize the communication signal. Then, the LFMCW signal is removed from the received signal before conventional OFDM demodulation. This effectively suppresses the interference propagation of the LFMCW signal to the OFDM demodulation process, ensures the orthogonality between OFDM subcarriers, and thus improves the accuracy of communication signal demodulation.

[0269] In this embodiment, algorithms such as SLM and PTS are used to reduce the PAPR of OFDM signals, thereby avoiding signal distortion and reducing the bit error rate during signal transmission. Furthermore, window functions are used to smooth the OFDM signal edges, reducing spectral leakage and minimizing interference with signals in adjacent frequency bands.

[0270] In the optimization of orthogonality maintenance, guard subcarriers and guard time slots are introduced before and after the replaced diagonal resource blocks to reduce the impact of signal leakage power on adjacent signal subcarriers. Furthermore, a sensing-communication decoupled receiving method is adopted at the receiver to improve the accuracy of OFDM signal demodulation.

[0271] The following describes how the signal transmission method provided in the embodiments of this application is specifically applied.

[0272] In vehicle-road cooperative scenarios within intelligent transportation systems, such as on roads with high traffic volume, road condition information (e.g., congestion location, congestion level, estimated travel time) is crucial for vehicles to plan their routes effectively. Roadside units monitor traffic conditions in real time and encode this information into OFDM signals, which are then transmitted to passing vehicles. Upon receiving this information, vehicles can adjust their routes promptly based on actual road conditions, avoiding congested areas and improving travel efficiency.

[0273] In complex urban road environments, especially at intersections, the risk of collisions is high due to blind spots and the complexity of traffic conditions. In such situations, roadside units (LSUs) can use LFMCW signals to detect objects in blind spots, such as suddenly appearing pedestrians or vehicles. Through vehicle-to-everything (V2X) communication, they can promptly broadcast warning information to surrounding vehicles, enabling drivers to react in advance, reducing collision risks, and ensuring driving safety.

[0274] In drone rescue scenarios, the high resolution of LFMCW signals enables them to detect vital signs, such as subtle breathing movements. At disaster sites, drones can quickly locate survivors over large areas by emitting LFMCW signals and analyzing changes in the echo signals, providing rescuers with accurate directions and improving rescue efficiency.

[0275] OFDM signals establish real-time and stable communication links among drone swarms, enabling rapid data sharing among multiple drones. Information acquired by each drone, such as real-time point cloud maps, target location coordinates, and its own flight status, can be transmitted to other drones in a timely manner via OFDM signals.

[0276] It should be understood that Figures 1 to 10 The flowcharts or scene diagrams shown are for illustrative purposes only and are not intended to limit the embodiments of this application to the examples illustrated. In fact, those skilled in the art can interpret the embodiments based on... Figures 1 to 10 The examples in the document can be transformed into equivalent ways to obtain more implementations.

[0277] The above text combined Figures 1 to 10 This document describes in detail the communication method provided in the embodiments of this application. The following will combine... Figures 11 to 12 The device embodiments of this application are described in detail below. It should be understood that the communication device of this application embodiment can execute the various communication methods of the foregoing embodiments of this application, that is, the specific working processes of the various products below can be referred to the corresponding processes in the foregoing method embodiments.

[0278] In the embodiments described above, the terminal device may execute some or all of the steps in each embodiment; the network device may execute some or all of the steps in each embodiment. These steps or operations are merely examples, and the embodiments of this application may also perform other operations or variations thereof. Furthermore, the steps may be executed in different orders as presented in the embodiments, and it is not necessary to execute all the operations in the embodiments of this application. Moreover, the sequence number of each step does not imply the order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0279] Figure 11 This is a schematic block diagram of a communication device provided in an embodiment of this application. Figure 11As shown, the communication device 1100 may include a transceiver module 1120. The transceiver module 1120 can implement corresponding communication functions, which can be internal communication functions of the communication device 1100 or communication functions between the communication device 1100 and other devices. Optionally, the transceiver module 1120 may also be referred to as a communication interface or transceiver module. Optionally, the communication device 1100 also includes a processing module 1110. The processing module 1110 can implement corresponding processing functions.

[0280] Optionally, the communication device 1100 further includes a storage module, which can be used to store instructions and / or data; the processing module 1110 can read the instructions and / or data in the storage module so that the communication device 1100 can implement the aforementioned method embodiments.

[0281] In one possible design, the communication device 1100 may correspond to the terminal device in the above method embodiments, or a component (such as a circuit, chip, or chip system) configured in the terminal device. The communication device 1100 can be used to perform the steps or processes performed by the terminal device in any of the above method embodiments.

[0282] For example, the transceiver module 1120 is used to receive a fifth signal; wherein the fifth signal is the signal received by the second device after the first signal sent by the first device has been transmitted.

[0283] Processing module 1110 is used to determine the second signal based on the fifth signal;

[0284] The above are merely examples; for detailed steps or procedures, please refer to the descriptions in the foregoing embodiments.

[0285] In one possible design, the communication device 1100 may correspond to the network device in the above method embodiments, or to a component (such as a circuit, chip, or chip system) configured in the network device. The communication device 1100 can be used to perform the steps or processes performed by the network device in any of the above method embodiments.

[0286] For example, the transceiver module 1120 is used to transmit a first signal, which is generated based on a second signal and a third signal, and to receive a fifth signal, which is the signal received by the first device after the transmitted first signal has been transmitted.

[0287] The processing module 1110 is used to determine the echo signal corresponding to the third signal based on the fifth signal.

[0288] The above are merely examples; for detailed steps or procedures, please refer to the descriptions in the foregoing embodiments.

[0289] Figure 12This is another schematic block diagram of the communication device 1200 provided in the embodiments of this application. The communication device 1200 may be a chip, chip system, or processor, etc., in a terminal device or network device that implements the above-described methods. The communication device 1200 can be used to implement the methods described in the above-described method embodiments; for details, please refer to the descriptions in the above-described method embodiments.

[0290] like Figure 12 As shown, the communication device 1200 may include one or more processors 1210, which may also be referred to as processing units or processing modules, and can implement certain control functions. The processor 1210 may be a general-purpose processor or a dedicated processor, such as a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, while the central processing unit can be used to control the communication device 1200 (e.g., a base station, baseband chip, user, user chip), execute software programs, and process data from the software programs.

[0291] In an alternative design, the processor 1210 may also store instructions and / or data, which can be executed by the processor 1210 to cause the communication device 1200 to perform the methods described in the above method embodiments.

[0292] In another alternative design, the communication device 1200 may include a communication interface 1220 for implementing receiving and transmitting functions. For example, the communication interface 1220 may be a transceiver circuit, interface, interface circuit, or transceiver. The transceiver circuit, interface, interface circuit, or transceiver for implementing receiving and transmitting functions may be separate or integrated. The aforementioned transceiver circuit, interface, interface circuit, or transceiver may be used for reading and writing code / data, or it may be used for transmitting or relaying signals.

[0293] Optionally, the communication device 1200 may include one or more memories 1230, which may store instructions that can be executed on the processor 1210, causing the communication device 1200 to perform the methods described in the above method embodiments. Optionally, the memories 1230 may also store data. Optionally, the processor 1210 may also store instructions and / or data. The processor 1210 and the memories 1230 may be provided separately or integrated together.

[0294] It should be understood that, in one possible design, the steps in the method embodiments provided in this application can be implemented by integrated logic circuits in the processor's hardware or by instructions in software form. The steps of the methods disclosed in the embodiments of this application can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method. To avoid repetition, detailed descriptions are not provided here.

[0295] In one implementation, the communication device 1200 may correspond to the terminal device in the above method embodiments and may be used to execute the various steps and / or processes executed by the terminal device in the above method embodiments. The processor 1210 may be used to execute instructions stored in the memory 1230, and when the processor 1210 executes the instructions stored in the memory, the processor 1210 is used to execute the various steps and / or processes of the above method embodiments corresponding to the terminal device.

[0296] In another implementation, the communication device 1200 may correspond to the network device in the above method embodiments and may be used to execute the various steps and / or processes executed by the network device in the above method embodiments. The processor 1210 may be used to execute instructions stored in the memory 1230, and when the processor 1210 executes the instructions stored in the memory, the processor 1210 is used to execute the various steps and / or processes of the above method embodiments corresponding to the network device.

[0297] It should be understood that the aforementioned processing device can be one or more chips. For example, the processing device can be a field-programmable gate array (FPGA), an application-specific integrated circuit (ASIC), a system-on-chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a programmable logic device (PLD), or other integrated chips.

[0298] It is understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0299] According to the method provided in the embodiments of this application, this application also provides a chip system, which includes one or more processors for calling and executing instructions stored in memory, thereby causing the method described in the embodiments of this application to be executed. The chip system may be composed of chips or may include chips and other discrete devices.

[0300] The chip system may include input circuits or interfaces for transmitting information or data, and output circuits or interfaces for receiving information or data.

[0301] According to the method provided in the embodiments of this application, this application also provides a communication system, which includes the aforementioned network device and terminal device.

[0302] According to the method provided in the embodiments of this application, this application also provides a computer program product, which includes: computer program code, which, when run on a computer, causes the computer to execute the various steps or processes executed by the network device or terminal device in any of the foregoing method embodiments.

[0303] According to the method provided in the embodiments of this application, this application also provides a computer-readable storage medium storing program code, which, when run on a computer, causes the computer to execute the various steps or processes executed by the network device or terminal device in any of the foregoing method embodiments.

[0304] The computer-readable storage medium may be the aforementioned volatile memory or non-volatile memory, or it may include both volatile memory and non-volatile memory.

[0305] In the embodiments of this application, the terms and English abbreviations are exemplary examples given for ease of description and should not be construed as limiting the application in any way. This application does not preclude the possibility of defining other terms that can achieve the same or similar functions in existing or future agreements.

[0306] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated.

[0307] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0308] It should be understood that in the various embodiments of this application, the sequence number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0309] In summary, the above description is merely a preferred embodiment of the technical solution of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A signal transmission method, characterized by, The method applied to a first device comprises: sending a first signal; wherein the first signal is generated based on a second signal and a third signal; the second signal is used for communication, and the third signal is used for sensing; the first signal is generated by mixing the third signal and a fourth signal, wherein: a resource block used for transmitting the fourth signal is a first resource block, the first resource block is part of a resource block used for transmitting the first signal, and the first resource block does not include a resource block used for transmitting the third signal; and the fourth signal is obtained by rewriting the second signal after determining the first resource block.

2. The method of claim 1, wherein, the first signal satisfies: ； wherein, is the first signal, is the third signal, is the fourth signal, is a preset window function.

3. The method of claim 2, wherein, the first resource block satisfies: ； in, It is the first resource block; It is the transmission time. , It is the transmission duration of the third signal; It is the frequency of the k-th subcarrier; The third signal is in Instantaneous frequency at any given moment; It is the frequency domain guard interval between the second signal and the third signal.

4. The method according to any one of claims 1 to 3, characterized in that, the second signal is an OFDM signal, and the third signal is an LFMCW signal.

5. The method of claim 4, wherein, the OFDM signal is obtained based on an OFDM frame, and the OFDM frame is generated based on to-be-sent data.

6. The method of claim 5, wherein, the OFDM frame includes a pilot subcarrier and a data subcarrier, the pilot subcarrier is used for channel estimation, and the data subcarrier is used for carrying the to-be-sent data.

7. The method according to any one of claims 1 to 3, characterized in that, The method further comprises: receiving a fifth signal; wherein the fifth signal is a signal received by the first device after transmission of the first signal; determining an echo signal corresponding to the third signal according to the fifth signal.

8. The method of claim 7, wherein, The determination of the echo signal corresponding to the third signal according to the fifth signal comprises: performing signal separation processing on the fifth signal to obtain a sixth signal and a seventh signal; the sixth signal is a signal received by the first device after transmission of the second signal, and the seventh signal is a signal received by the first device after transmission of the third signal; determining a phase error according to a pilot signal corresponding to the sixth signal and a preset pilot signal; performing phase correction on the seventh signal according to the phase error to obtain the echo signal corresponding to the third signal.

9. A signal transmission method, characterized by, The method applied to a second device comprises: receiving a fifth signal; wherein the fifth signal is a signal received by the second device after transmission of a first signal sent by a first device, and the first signal is generated based on a second signal and a third signal; the second signal is used for communication, and the third signal is used for sensing; determining the second signal according to the fifth signal; the first signal is generated by mixing the third signal and a fourth signal, wherein: a resource block used for transmitting the fourth signal is a first resource block, the first resource block is part of a resource block used for transmitting the first signal, and the first resource block does not include a resource block used for transmitting the third signal; and the fourth signal is obtained by rewriting the second signal after determining the first resource block.

10. The method of claim 9, wherein, the first signal satisfies: ； wherein, is the first signal, is the third signal, is the fourth signal, is a preset window function.

11. The method of claim 10, wherein, the first resource block satisfies: ； in, It is the first resource block; It is the transmission time. , It is the transmission duration of the third signal; It is the frequency of the k-th subcarrier; The third signal is in Instantaneous frequency at any given moment; It is the frequency domain guard interval between the second signal and the third signal.

12. The method according to any one of claims 9-11, characterized in that, the second signal is an OFDM signal, and the third signal is an LFMCW signal.

13. The method of claim 12, wherein, the OFDM signal is obtained based on an OFDM frame, and the OFDM frame is generated based on to-be-sent data.

14. The method of claim 13, wherein, The OFDM frame comprises pilot subcarriers and data subcarriers, the pilot subcarriers are used for channel estimation, and the data subcarriers are used for carrying the to-be-sent data.

15. The method according to any one of claims 9-11, characterized in that, The determining the second signal according to the fifth signal comprises: signal separation processing is performed on the fifth signal to obtain a sixth signal and a seventh signal; the sixth signal is a signal received by the second device after transmission of the second signal, and the seventh signal is a signal received by the second device after transmission of the third signal; processing is performed on the sixth signal according to a preset pilot signal, a chirp rate of the third signal, and a transmission duration of the third signal to obtain a fourth signal; the second signal is obtained according to the fourth signal.

16. A signal transmission method, characterized by, The method applied to a third device comprises: receiving a fifth signal; wherein the fifth signal is a signal received by the third device after transmission of a first signal sent by a first device, the first signal is generated based on a second signal and a third signal; the second signal is used for communication, and the third signal is used for sensing; determining a corresponding echo signal of the third signal according to the fifth signal; the first signal is generated by mixing the third signal and a fourth signal, wherein: a resource block used for transmitting the fourth signal is a first resource block, the first resource block is part of a resource block used for transmitting the first signal, and the first resource block does not include a resource block used for transmitting the third signal; the fourth signal is obtained by rewriting the second signal after determining the first resource block.

17. The method of claim 16, wherein, the first signal satisfies: ； wherein, is the first signal, is the third signal, is the fourth signal, is a preset window function.

18. The method of claim 17, wherein, the first resource block satisfies: ； in, It is the first resource block; It is the transmission time. , It is the transmission duration of the third signal; It is the frequency of the k-th subcarrier; The third signal is in Instantaneous frequency at any given moment; It is the frequency domain guard interval between the second signal and the third signal.

19. The method according to any one of claims 16-18, characterized by, the second signal is an OFDM signal, and the third signal is an LFMCW signal.

20. The method of claim 19, wherein, The OFDM signal is obtained based on an OFDM frame, and the OFDM frame is generated based on to-be-sent data.

21. The method of claim 20, wherein, The OFDM frame comprises pilot subcarriers and data subcarriers, the pilot subcarriers are used for channel estimation, and the data subcarriers are used for carrying the to-be-sent data.

22. The method of any one of claims 16-18, wherein, The determining the corresponding echo signal of the third signal according to the fifth signal comprises: signal separation processing is performed on the fifth signal to obtain a sixth signal and a seventh signal; the sixth signal is a signal received by the third device after transmission of the second signal, and the seventh signal is a signal received by the third device after transmission of the third signal; determining a phase error according to a pilot signal corresponding to the sixth signal and a preset pilot signal; performing phase correction on the seventh signal according to the phase error to obtain the corresponding echo signal of the third signal.

23. An electronic device, comprising: The electronic device comprises one or more processors and a memory; The memory is coupled to the one or more processors, the memory is used to store computer program code, the computer program code comprises computer instructions, and the one or more processors invoke the computer instructions to enable the electronic device to perform the method in any one of claims 1 to 22.

24. A chip system, characterized by The chip system is applied to an electronic device, and the chip system comprises one or more processors configured to invoke computer instructions to cause the electronic device to perform the method of any one of claims 1-22.

25. A computer-readable storage medium, characterized in that, The computer readable storage medium comprises computer instructions which, when executed on an electronic device, cause the electronic device to perform the method of any one of claims 1-22.

26. A communication system, characterized by comprising a first device, a second device, and a third device; the first device is configured to perform the method of any one of claims 1-8, the second device is configured to perform the method of any one of claims 9-15, and the third device is configured to perform the method of any one of claims 16-22.

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