Communication method, terminal device, and network device

Abstract

Provided are a communication method, a terminal device, and a network device. The method includes: a first terminal device receiving a first signal transmitted by a network device, the first signal having an AFDM waveform; and the first terminal device removing an interference signal from the first signal according to a signal processing parameter related to the interference signal. In this way, by obtaining a signal processing parameter related to an interference signal to remove the interference signal, the reception performance of a signal of an AFDM waveform is improved.

Description

Technical Field

[0001] This application relates to the field of communication technology, and more specifically, to a communication method, terminal equipment, and network equipment. Background Technology

[0002] Affine frequency division multiplexing (AFDM) waveforms exhibit superior performance in resisting high Doppler frequency shift and multipath interference. For multi-user systems using AFDM waveforms, achieving interference suppression becomes a problem that needs to be solved. Summary of the Invention

[0003] This application provides a communication method, a terminal device, and a network device. The various aspects covered by this application are described below.

[0004] In a first aspect, a communication method is provided, comprising: a first terminal device receiving a first signal sent by a network device, the first signal having an analog radio frequency division multiplexing modulation (AFDM) waveform; and the first terminal device removing the interference signal from the first signal according to signal processing parameters related to the interference signal.

[0005] In a second aspect, a communication method is provided, comprising: a network device sending a first signal to a first terminal device, the first signal having an analog radio frequency division multiplexing modulation (AFDM) waveform; the network device sending signal processing parameters related to an interference signal to the first terminal device, the signal processing parameters being used by the first terminal device to remove the interference signal from the first signal.

[0006] Thirdly, a terminal device is provided, comprising: a transceiver unit for receiving a first signal transmitted by a network device, the first signal having an analog radio frequency division multiplexing modulation (AFDM) waveform; and a processing unit for removing the interference signal from the first signal according to signal processing parameters related to the interference signal.

[0007] Fourthly, a network device is provided, comprising: a transceiver unit for transmitting a first signal to a first terminal device, the first signal having an analog radio frequency division multiplexing modulation (AFDM) waveform; the network device transmitting signal processing parameters related to an interference signal to the first terminal device, the signal processing parameters being used by the first terminal device to remove the interference signal from the first signal.

[0008] Fifthly, a terminal device is provided, including a transceiver, a memory, and a processor, wherein the memory is used to store a program, and the processor is used to invoke the program in the memory and control the transceiver to receive or send signals, so that the terminal device performs the method as described in the first aspect.

[0009] In a sixth aspect, a network device is provided, including a transceiver, a memory, and a processor, wherein the memory is used to store a program, and the processor is used to invoke the program in the memory and control the transceiver to receive or transmit signals so that the network device performs the method as described in the second aspect.

[0010] A seventh aspect provides an apparatus including a processor for calling a program from a memory to cause the apparatus to perform the method as described in the first or second aspect.

[0011] Eighthly, a chip is provided, including a processor for calling a program from memory to cause a device having the chip mounted to perform the method as described in the first or second aspect.

[0012] A ninth aspect provides a computer-readable storage medium having a program stored thereon that causes a computer to perform the method as described in the first or second aspect.

[0013] In a tenth aspect, a computer program product is provided, the computer program product comprising a program that causes a computer to perform the method as described in the first or second aspect.

[0014] Eleventhly, a computer program is provided that causes a computer to perform the method as described in the first or second aspect.

[0015] In this embodiment of the application, after the first terminal device receives the first signal with an AFDM waveform sent by the network device, it can remove the interference signal from the first signal according to the signal processing parameters related to the interference signal. The interference signal includes, for example, the signal sent by the network device to other terminal devices. In this way, by obtaining the signal processing parameters related to the interference signal to remove the interference signal, the reception performance of the AFDM waveform signal is improved. Attached Figure Description

[0016] Figure 1 This is a system architecture example diagram of a communication system applicable to embodiments of this application.

[0017] Figure 2 This is a schematic diagram of the signal processing flow at the transmitting end.

[0018] Figure 3 This is a schematic diagram of the signal processing flow at the receiving end.

[0019] Figure 4 This describes the signal processing flow for both the transmitting and receiving ends.

[0020] Figure 5 This is a flowchart illustrating the communication method according to an embodiment of this application.

[0021] Figure 6 This is a schematic diagram of the structure of a terminal device according to an embodiment of this application.

[0022] Figure 7 This is a schematic diagram of the structure of a network device according to an embodiment of this application.

[0023] Figure 8 This is a schematic diagram of a communication apparatus according to an embodiment of this application. Detailed Implementation

[0024] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0025] Communication system Figure 1 This is an example diagram of the system architecture of the communication system 100 applicable to embodiments of this application. The communication system 100 may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120. The network device 110 can provide network coverage for a specific geographical area and can communicate with the terminal device 120 located within that coverage area. The terminal device 120 can access a network, such as a wireless network, through the network device 110. Optionally, the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which are not limited in this embodiment.

[0026] It should be understood that the technical solutions of the embodiments of this application can be applied to various communication systems, such as fifth-generation (5G) systems, new radio (NR) systems, long-term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, etc. The technical solutions provided in this application can also be applied to future communication systems, such as sixth-generation mobile communication systems, satellite communication systems, and so on.

[0027] The technical solutions of this application embodiment can also be applied to communication systems such as wireless local area networks (WLAN), wireless fidelity (WIFI), and high-performance radio local area networks (HIPELAN). The technical solutions provided in this application embodiment can be applied to communication systems using the 802.11 standard. For example, the 802.11 standard includes, but is not limited to, the 802.11ax standard, the 802.11be standard, the 802.11bn standard, and the next-generation 802.11 standard (post802.11bn).

[0028] In this application embodiment, the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user apparatus. In this application embodiment, the terminal device can refer to a device that provides voice and / or data connectivity to a user, and can be used to connect people, objects, and machines, such as a handheld device with wireless connectivity, vehicle-mounted device, etc. Terminal devices can also be mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, self-driving, remote medical surgery, smart grids, transportation safety, smart cities, and smart homes. Optionally, terminal devices can act as base stations. For example, a terminal device can act as a dispatching entity, providing sidelink signals between terminal devices in vehicle-to-everything (V2X) or device-to-device (D2D) systems. For instance, cellular phones and cars communicate with each other using sidelink signals. Cellular phones and smart home devices communicate without relaying communication signals through base stations.

[0029] In this embodiment, the network device can be a device used to communicate with a terminal device. The network device includes access network devices or wireless access network devices. For example, the network device is a base station. A base station can broadly encompass various names as listed below, or can be replaced by names such as NodeB, evolved NodeB (eNB), next-generation NodeB (gNB), advanced NodeB (aNB), relay station, transmitting and receiving point (TRP), transmitting point (TP), master evolved node B (MeNB), secondary evolved node B (SeNB), multi-standard wireless (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station can be a macro base station, micro base station, relay node, donor node, or similar, or a combination thereof. A base station can also refer to a communication module, modem, or chip installed within the aforementioned equipment or apparatus. A base station can also be a mobile switching center, or an equipment that performs base station functions in device-to-device (D2D), vehicle-to-everything (V2X), and machine-to-machine (M2M) communications, a network-side device in a 6G network, or an equipment that performs base station functions in future communication systems. A base station can support networks with the same or different access technologies. The embodiments of this application do not limit the specific technologies or equipment forms used in the network equipment. In some deployments, the network equipment may include a CU or a DU; or, the network equipment may include both a CU and a DU. Optionally, the base station includes an AAU. Wherein, aNB serves as a base station and / or access network equipment in a 6G system, and the interface between the devices is, for example, referred to as Xa.

[0030] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move depending on the location of the mobile base station. In other examples, a helicopter or drone can be configured as a device to communicate with another base station.

[0031] In some implementations, the terminal device may also include access point stations (AP STAs) and / or non-access point stations (non-AP STAs) in the WLAN. The terminal device may support, but is not limited to, 802.11be, 802.11bn, or post-802.11bn standards; or it may support various current and future 802.11 family WLAN standards such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

[0032] Accordingly, network devices may also include access points (APs) in a WLAN. Network devices may support 802.11be, 802.11bn, or post-802.11bn standards; or, they may support various current and future 802.11 family WLAN standards such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

[0033] Network devices and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed in the air on airplanes, balloons, and satellites. This application does not limit the scenario in which the network devices and terminal devices are located.

[0034] It should be understood that all or part of the functions of the communication device in this application can also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform such as a cloud platform.

[0035] The integration of new waveform technologies with 6G is becoming key to achieving disruptive performance in next-generation communication systems. To meet the extreme demands of 6G in areas such as ultra-high speed, extremely low latency, massive connectivity, and integrated sensing, traditional OFDM waveforms are proving inadequate. Therefore, new waveforms need to be designed to provide a new physical layer solution for building a smart, green, and secure wireless foundation for 6G.

[0036] As an example, these new waveforms include, for instance, orthogonal time-frequency space (OTFS) waveforms. These waveforms map signals into the time-delay-Doppler domain to accommodate channel variations in highly mobile environments.

[0037] As an example, these new waveforms include Affine Frequency Division Multiplexing (AFDM) waveforms. AFDM technology maps signals to the time-delay-Doppler domain or the affine domain for processing. By mapping data symbols to the affine Fourier transform domain composed of linear frequency modulated signals, time delay and Doppler frequency offset are transformed into independent cyclic shifts in the transform domain, thus achieving full diversity in the time-delay-Doppler dimension of the channel in a dual-diffuse channel. Therefore, AFDM technology can effectively address time-frequency selective fading in high-speed mobile environments, converting time-varying channels into almost non-fading deterministic channels, thereby significantly improving transmission reliability and spectral efficiency in complex scenarios.

[0038] AFDM waveforms, as a highly promising candidate waveform for 6G, are based on the principle of using affine Fourier transform to map data symbols onto a "chirp" basis function composed of multiple linear frequency modulated signals. This design enables full diversity of time delay and Doppler frequency offset in dual-dispersion channels, i.e., signals with both time selectivity and frequency selectivity. Theoretically, it can achieve optimal channel capacity performance. Compared to OTFS waveforms, it has lower signal processing complexity, does not require complex two-dimensional channel estimation and equalization, and is easier to implement in hardware.

[0039] In typical 6G scenarios, AFDM waveforms demonstrate unique advantages. For example, in highly mobile environments such as high-speed rail and drone communications, AFDM technology fundamentally eliminates inter-carrier interference caused by high-speed motion because it converts Doppler frequency shift into cyclic shift of the signal in the affine domain. Furthermore, in non-line-of-sight transmission in dense urban areas, the chirped signal structure used in AFDM inherently possesses resistance to multipath interference, enabling robust signal reception through simple threshold detection. Moreover, the AFDM waveform structure is easily integrated with sensing functions; by analyzing the affine domain offset of the echo signal, high-precision communication and target positioning can be achieved simultaneously.

[0040] AFDM technology provides a novel approach to reliable 6G communication in complex electromagnetic environments by constructing an orthogonal and robust signal space in the affine domain. It not only approaches the Shannon limit in theoretical diversity performance, but its simple transceiver architecture also aligns with 6G's requirements for low power consumption and high energy efficiency. With the advancement of related algorithm optimization and hardware verification, AFDM technology is expected to become one of the core physical layer technologies supporting 6G's vision of "Internet of Everything."

[0041] The principle of AFDM is described below.

[0042] AFDM is a chirp-based multicarrier waveform. The core idea of ​​AFDM is to modulate information symbols onto a chirp signal and adjust it according to channel characteristics to achieve near-optimal transmission performance. The modulation and demodulation process of AFDM can be implemented using discrete affine Fourier transform (DAFT).

[0043] The affine Fourier transform (AFT) is a class of generalized integral transforms involving four parameters, three of which are free parameters. As an example, the affine Fourier transform can be expressed as: ; The four parameters are a, b, c, and d, and they satisfy the following relationship: .

[0044] Based on three free parameters, AFT can achieve more flexible performance. For example, specifying the values ​​of the parameters can lead to special transformations, such as Fourier transform and Chirp product.

[0045] In practical applications, discrete AFDM waveforms are required. Fourier transform can be calculated quickly using fast Fourier transform (FFT), resulting in a fast-calculated DAFT form, upon which AFDM modulation is based.

[0046] For discrete AFDM, the discrete time series can be defined as: , ;in, N The number of discrete sampling points. T Sampling time.

[0047] The sequence after DAFT transformation is: , ;in, F The frequency sampling interval.

[0048] Then we have: , ;in, It is a DAFT matrix. It is a Fourier matrix or a Fourier transform matrix.

[0049] in, or It can be defined based on the following formula: .

[0050] Among them, parameters and They are respectively: , ;in, and This indicates the sweep frequency of the Chirp signal.

[0051] The inverse of a matrix is: ;in, It is a matrix The conjugate transpose of .

[0052] The following is combined Figure 2 and Figure 3 This section describes the implementation block diagrams for the transmitter and receiver, respectively, where AFDM can be applied. As an example, Figure 2 The signal processing flow at the transmitting end is shown; Figure 3 The signal processing flow at the receiving end is shown.

[0053] like Figure 2 As shown, at the transmitting end, the original symbol x undergoes serial-to-parallel (S / P) conversion and is then input to the inverse discrete affine Fourier transform (IDAFT) module. In the IDAFT module, the output obtained after S / P processing is first compared with the diagonal matrix... Perform element-wise multiplication, then inverse fast Fourier transform (IFFT), and finally sum to... Element-wise multiplication is performed to generate a time-domain signal s. The time-domain signal s output by the IDAFT module is then processed by adding a chirp periodic prefix (CPP) and performing parallel-to-serial (P / S) conversion before being transmitted via a wireless channel.

[0054] like Figure 3 As shown, the receiver performs the inverse operation of the transmitter to recover the original symbol. For example, the received signal on the wireless channel undergoes S / P processing and CPP removal sequentially to obtain the signal vector r, which is then input into the DAFT module. In the DAFT module, r is first compared with... Perform a dot product to obtain the input for the FFT, and then multiply the output of the FFT with... Perform a dot product. Then, after P / S processing, recover the symbol y.

[0055] As can be seen, Discrete AFDM adopts a three-stage efficient structure of "element-by-element multiplication + FFT / IFFT + element-by-element multiplication". Specifically, the transmitting end first multiplies the data symbol by a discrete quadratic phase sequence, then performs an IFFT transformation, and finally multiplies it again by the quadratic phase sequence to generate the time-domain signal. The receiving end performs the inverse operation, using FFT and phase compensation to recover the original symbol. This implementation effectively reduces complexity and reuses the relatively mature FFT / IFFT hardware acceleration units in OFDM systems, offering advantages of low complexity and hardware friendliness.

[0056] To construct a complete AFDM communication system, steps such as symbol mapping, frame structure design, serial-to-parallel conversion, channel estimation, channel equalization, and demapping are required. For example, in actual transmission, issues such as frequency offset estimation, synchronization, and peak-to-average power ratio (PAPR) suppression also need to be considered. Taking into account factors such as sequence-to-symbol mapping and framing, parameters need to be removed from the received signal of the terminal equipment beforehand. The impact. As an example. Figure 4 The signal processing flow at the transmitting and receiving ends is illustrated. The steps performed by the transmitting end are detailed below. Figure 4 For the upper part of the instructions, see the steps performed by the receiving end. Figure 4 The lower half of the text.

[0057] like Figure 4 As shown, at the transmitting end, the raw data undergoes binary sequence generation, symbol mapping, and frame structure design sequentially to obtain the raw symbol x. The raw symbol x is then processed by the S / P algorithm and input to the IDAFT module. In the IDAFT module, the output after S / P processing is first compared with the diagonal matrix... Perform element-wise dot product, then IFFT, and finally AND. Element-wise multiplication is performed to generate a time-domain signal s. The time-domain signal s output by the IDAFT module is then subjected to CPP addition and P / S processing before being transmitted via a wireless channel.

[0058] The signal received by the receiver through the wireless channel includes not only the signal transmitted by the transmitter but may also contain additive white Gaussian noise (AWGN). At the receiver, the received signal undergoes S / P processing and CPP removal sequentially to obtain the signal vector r, which is then input into the DAFT module. In the DAFT module, r is first compared with... Perform a dot product to obtain the input for the FFT, and then multiply the output of the FFT with... Dot multiplication is performed. Then, after P / S processing, the symbol y is recovered. The signal obtained after P / S processing can be channel equalized through operations such as channel estimation, and then demapped and output as a sequence to recover the binary sequence.

[0059] Since 6G systems may evolve smoothly based on the 5G architecture and industry chain, compatibility issues need to be considered when integrating discrete AFDM into existing systems. On the one hand, configurable phase rotation modules can be inserted into the future OFDM baseband processing chain, enabling flexible switching of waveform modes according to scenario requirements. On the other hand, it is necessary to unify the time-frequency resource grid, parameter sets (e.g., subcarrier spacing, cyclic prefix length), and frame structure to ensure that AFDM and OFDM can coexist on the same hardware platform and support hybrid waveform scheduling, thereby introducing performance gains for high-speed mobile scenarios to 6G while inheriting the 5G ecosystem.

[0060] For example, in a multi-user AFDM system, different terminal devices occupy different channels, resulting in differences in the AFDM parameters used by each device. When a terminal device detects downlink data, it needs to know the AFDM parameters of other terminal devices to remove interference caused by their downlink data from the received signal.

[0061] Therefore, in this embodiment of the application, after the first terminal device receives the first signal with an AFDM waveform sent by the network device, it can remove the interference signal from the first signal according to the signal processing parameters related to the interference signal. The interference signal includes, for example, the signal sent by the network device to other terminal devices. In this way, by obtaining the signal processing parameters related to the interference signal to remove the interference signal, the reception performance of the AFDM waveform signal is improved.

[0062] The following, combined with Figure 5 The technical solutions of the embodiments of this application will be described in detail below.

[0063] Figure 5 This is a flowchart illustrating the communication method provided in an embodiment of this application. Figure 5 The method 500 shown can be performed by a first terminal device and a network device. The first terminal device may be, for example, a... Figure 1 The terminal device 120 shown can be, for example, a network device. Figure 1 The network device 110 shown is shown. Figure 5 The method 500 shown may include some or all of the following steps.

[0064] In step 510, the network device sends a first signal to the first terminal device; correspondingly, the first terminal device receives the first signal sent by the network device. The first signal has an AFDM waveform. The AFDM waveform is obtained, for example, based on the aforementioned IDAFT process, that is, using an "element-wise multiplication + FFT / IFFT + element-wise multiplication" method. For example, before performing the IFFT, the modulation symbols are multiplied by a diagonal matrix. Perform a dot product between the two sequences and use the resulting sequence as the input for an IFFT. Then, multiply the IFFT output with the diagonal matrix. Perform a dot product between them to obtain the sequence output by IFFT.

[0065] In step 520, the first terminal device removes the interference signal from the first signal according to the signal processing parameters related to the interference signal.

[0066] In this embodiment, the interference signal includes, for example, signals that may interfere with the signals of the first terminal device, or signals that are unrelated to the first terminal device. For example, the interference signal may be a signal sent by a network device to other terminal devices, a signal with certain specific functions (e.g., pilot signals, reference signals, etc.), a common signal sent by the network device, or other types of interference signals. The technical solution described in this embodiment can remove any type of interference signal with an AFDM waveform.

[0067] As an example, the interference signal includes a portion of the third signal sent by the network device to the second terminal device. In this case, the signal processing parameters used to remove the interference signal may include signal processing parameters related to the second terminal device, or in other words, signal processing parameters used to generate the third signal. In this embodiment, the example of the interference signal being a signal sent by the network device to the second terminal device is used to describe in detail how to remove the interference signal. It should be understood that other terminal devices or other types of interference signals can also be removed in a similar manner.

[0068] Signal processing parameters used to remove interference signals can be sent from the network device to the first terminal device, for example, such as... Figure 5 As shown, method 500 further includes step 530; or, the signal processing parameters are predefined or preconfigured; or, a portion of the signal processing parameters are sent by the network device to the first terminal device, and another portion of the parameters are predefined or preconfigured.

[0069] In multi-user scenarios, different users occupy different frequency bands when mapping frequency resources. To conserve resources, subcarriers between different users are adjacent; for example, the subcarriers of the first terminal device and the second terminal device are adjacent. As an example, the network device allocates subcarriers 1-240 to the first terminal device and subcarriers 241-360 to the second terminal device. During downlink transmission, the first signal received by the first terminal device is a mixture of signals from different subcarriers. In an OFDM system, the first terminal device can convert the received signal to the time domain using FFT, thereby separating the signals from each user. However, in an AFDM system, the time-domain signals of each user need to be compared with a diagonal matrix before performing FFT. Performing a dot product between them, since multiplication in the time domain is equivalent to convolution in the frequency domain, if the diagonal matrix is ​​not removed before the FFT... Due to the influence of this, even after performing FFT, the signals of each user cannot be separated. Therefore, it is necessary to design the downlink signal processing method so that in a multi-user AFDM system, each terminal device can better separate its own signal.

[0070] In this embodiment of the application, in step 520, firstly, the first terminal device can perform bandpass filtering on the received first signal to obtain a second signal located in the first frequency band, wherein the first frequency band includes the frequency band corresponding to the first terminal device and the frequency band corresponding to the interference signal; secondly, the first terminal device removes the interference signal from the second signal according to the signal processing parameters.

[0071] The first terminal device performs bandpass filtering on the first signal received from the network device to obtain a signal within the first frequency band. However, since the bandwidth of a bandpass filter is usually larger than the signal bandwidth—for example, the first frequency band may include not only the frequency band occupied by the first terminal device but also adjacent guard bands at both ends—the result after performing bandpass filtering may not be ideal, leaving incoherent signals between the first terminal device and the network at both ends. In other words, bandpass filtering may not completely filter out incoherent signals between the first terminal device and the network. That is, the second signal obtained after bandpass filtering may contain interference signals in addition to the signal that the first terminal device expects to receive (hereinafter referred to as the effective signal of the first terminal device).

[0072] As an example, the subcarrier occupied by the first terminal device is adjacent to or close to the subcarrier occupied by the second terminal device. Here, "adjacent to or close to" means that the subcarrier occupied by the first terminal device and the subcarrier occupied by the second terminal device are next to each other, or that there is a guard band between them. After the first terminal device performs bandpass filtering on the received first signal, it obtains a second signal located in the first frequency band. In addition to the effective signal of the first terminal device, the second signal may also contain signals sent to the second device by the network device. Therefore, the first terminal device needs to process the second signal in the first frequency band to remove the interference caused by the signal of the second terminal device in the cell's second signal, thereby separating the effective signal of the first terminal device.

[0073] Hereinafter, the signal sent from the network device to the second terminal device is referred to as the third signal. The first terminal device does not need to process the entire third signal, but only the portion of the third signal that falls within the first frequency band (i.e., the interference signal). Since the subcarriers occupied by the second terminal device are adjacent to or close to the subcarriers occupied by the first terminal device, this interference signal is typically located at the high-frequency end or low-frequency end of the first frequency band. For example, the first frequency band includes subcarriers K1 to K... N The interference signal is located on subcarriers K1 to K2. 1+k Alternatively, the interference signal is located on subcarrier K. N-k To K N The bandwidth of the interference signal is k subcarriers.

[0074] In an AFDM system, if the number of IFFT points is much greater than the number of carriers actually used by the first terminal device, then the first terminal device may receive a superposition of signals from various terminal devices, because the signal processing maps the signals of each subcarrier across the entire time domain. For example, the second signal obtained by bandpass filtering the first signal may include: + .in, This is the first vector matrix associated with the first terminal device; This is the first vector matrix related to the second terminal device (or, in other words, related to the third signal); The IFFT output corresponding to the signal of the first terminal device; For example, the IFFT output corresponding to the interference signal. This includes the elements related to the interference signal in the IFFT output corresponding to the third signal.

[0075] It can be seen that in the second signal + middle, This is the part related to the first terminal device; therefore, it is necessary to extract the interference term from the second signal to obtain the part related to the first terminal device. .

[0076] In the process of generating the signal, =IFFT( X1 is the modulation symbol (or original symbol, frequency domain symbol) of the first terminal device. The second vector matrix X1 is associated with the first terminal device. Performing a dot product between the two elements followed by an IFFT will yield the output of the IFFT. Similarly, It can also be done through IFFT( X2 is determined to be the modulation symbol (or original symbol, frequency domain symbol) corresponding to the third signal. X2 is the second vector matrix related to the second terminal device (or, in other words, related to the third signal), and the second vector matrix... Performing a dot product between the elements and then applying an IFFT will give you the output of the IFFT. Including elements in the IFFT output that are related to the interference signal, or in other words, This includes the elements in the IFFT output that correspond to the first frequency band.

[0077] In this embodiment of the application, " " indicates "multiplication" or "multiplication sign", " can also be replaced with "×"; " " represents "dot product, also known as "element-by-element multiplication", " can also be replaced with " Similarly, The symbol "" represents "dot division," also known as "element-by-element division." For example, "dot multiplication" with a matrix can be replaced by "dot division" with the transpose (or conjugate transpose) of that matrix; similarly, "dot division" with a matrix can be replaced by "dot multiplication" with the transpose of that matrix. Therefore, the diagonal matrix in this embodiment... and its corresponding transpose matrix These can be used interchangeably.

[0078] In order to obtain the signal corresponding to the first terminal device First, the second signal obtained by bandpass filtering, i.e. + , and the first vector matrix Perform a dot division between them to obtain + ,in, These are the interference terms related to the interference signal. The first vector matrix is ​​associated with the first terminal device. Let be the first vector matrix associated with the third signal.

[0079] The diagonal matrix mentioned above can be calculated, for example, in the following way: ;in, This is the first vector matrix related to the second terminal device (or, in other words, related to the third signal). The first parameter is related to the second terminal device (or, in other words, related to the third signal). This represents the number of discrete sampling points. ;in, This is the second vector matrix related to the second terminal device (or, in other words, related to the third signal). This is a second parameter related to the second terminal device (or, in other words, related to the third signal). Let be the number of discrete sampling points, where In With China of They can be equal or unequal; ;in, The first vector matrix is ​​associated with the first terminal device. The first parameter is related to the first terminal device. This represents the number of discrete sampling points. ;in, This is the second vector matrix associated with the first terminal device. The second parameter is related to the first terminal device. Let be the number of discrete sampling points, where In and In They can be equal or unequal.

[0080] The first and second parameters mentioned above are both related to the scan slope of the chirped signal, that is, , , , It is related to the scan slope of the chirped signal. For example, ,in, The first parameter is related to the second terminal device (or, in other words, related to the third signal). The sweep frequency of the chirped signal. For example, the sampling time; ,in, This is a second parameter related to the second terminal device (or, in other words, related to the third signal). The sweep frequency of the chirped signal. For example, the sampling time; ,in, The first parameter is related to the first terminal device. The sweep frequency of the chirped signal. For example, the sampling time; ,in, The second parameter is related to the first terminal device. The sweep frequency of the chirped signal. Sampling time.

[0081] As mentioned earlier, in order to obtain the interference terms The terminal device needs to obtain the corresponding signal processing parameters, for example, , , , IFFT( ), etc. In the embodiments of this application, the signal processing parameters involved include, for example, one or more of the following: a first parameter related to the second terminal device (or, in other words, related to the third signal) (e.g., ); a second parameter (e.g., related to the second terminal device (or, in other words, related to the third signal) ); the first vector matrix (e.g., related to the second terminal device (or, related to the third signal) ); and the second vector matrix (e.g., related to the second terminal device (or, related to the third signal) The elements related to the interference signal in the matrix; the modulation symbol corresponding to the interference signal (e.g., X2); the modulation symbol corresponding to the interference signal (e.g., X2); and the second vector matrix (e.g., The dot product result between elements related to the interference signal in ) (e.g., ); the frequency domain information corresponding to the interference signal.

[0082] Among them, the first parameter related to the third signal (e.g., ) and the second parameter (e.g., All of these are related to the scan slope of the chirped signal used to generate the AFDM waveform.

[0083] The first vector matrix (e.g., related to the second terminal device, or related to the third signal) ), for according to the first parameter (e.g., The diagonal matrix generated; the second vector matrix related to the second terminal device (or, in other words, related to the third signal) (e.g., ), for according to the second parameter (e.g., The first vector matrix is ​​used to generate a diagonal matrix. The second vector matrix is ​​used to perform a dot product with the modulation symbol corresponding to the third signal (e.g., X2) to form the input of the IFFT. The first vector matrix is ​​used to perform a dot product with the time-domain signal of the IFFT output.

[0084] The modulation symbols corresponding to the interference signal include, for example, the portion of X2 related to the interference signal, or in other words, the portion of X2 related to the first frequency band. The modulation symbols corresponding to the interference signal, and the second vector matrix (e.g., The dot product result between elements related to the interference signal in the array, for example, refers to... The part related to the interference signal, or in other words, The part related to the first frequency band. Of course, the result of IFFT can also be used, i.e., IFFT( The part of IFFT related to the interference signal, or in other words, the part related to the interference signal. The portion of the signal related to the first frequency band is sent to the first terminal device as signal processing parameters.

[0085] When the network device instructs the signal processing parameters to the first terminal device, it directly instructs... , ,or Compared to indicating the result of the IFFT, indicating frequency-domain information before the IFFT reduces signaling overhead. In other words, indicating time-domain information after the IFFT reduces signaling overhead. However, by directly indicating the IFFT result related to the interference signal to the first terminal device, the network device can reduce the processing complexity of the first terminal device. The terminal device can directly use the IFFT result to calculate the interference term without having to perform the IFFT again.

[0086] The frequency domain information corresponding to the interference signal includes, for example, information on the frequency domain bandwidth of the interference signal and / or information on the frequency domain location of the interference signal, such as the bandwidth and / or location information of the first frequency band corresponding to the bandpass filter of the first terminal device.

[0087] Because network devices need to instruct terminal devices on the aforementioned signal processing parameters, for example, The part related to the interference signal (or, The part related to the first frequency band in X2 and the part related to the interference signal in X2 (or, the part related to the first frequency band in X2). Elements related to interference signals (or, (elements related to the first frequency band), or IFFT ( Elements related to the interference signal in ) (or, in other words, IFFT) (The elements related to the first frequency band in the signal), therefore, network devices need to know the frequency domain information of the interference signal, that is, the information of the first frequency band, such as the location and / or width of the first frequency band, in order to know which elements need to be indicated to the terminal devices.

[0088] To this end, the first terminal device can report its capability information to the network device, which includes frequency domain information corresponding to the interference signal. Further, optionally, the network device can send a request message to the terminal device, the request message being used to request the first terminal device to report the capability information.

[0089] Here, the frequency domain information corresponding to the interference signal refers to the frequency domain difference between the bandpass filter frequency band of the first terminal device and the effective signal frequency band of the first terminal device. For example, the frequency domain information corresponding to the interference signal includes information about the guard band adjacent to the subcarrier occupied by the first terminal device.

[0090] For example, the first frequency band includes subcarriers K1 to K. N The interference signal is located on subcarriers K1 to K2. 1+k Alternatively, the interference signal is located on subcarrier K. N-k To K N Terminal devices can report subcarriers K1 to K... 1+k Or subcarrier K N-k To K N Information.

[0091] The above example only illustrates the situation where the second terminal device (or the third signal) interferes with the first terminal device. In practical applications, interference signals may exist at both ends of the subcarrier occupied by the first terminal device. For example, consider frequency bands 1, 2, and 3 from low to high frequencies. Multiple subcarriers corresponding to frequency band 1 are allocated to the second terminal device, multiple subcarriers corresponding to frequency band 2 are allocated to the first terminal device, and multiple subcarriers corresponding to frequency band 3 are allocated to the third terminal device. Frequency band 2, occupied by the first terminal device, lies between frequency band 1 occupied by the second terminal device and frequency band 3 occupied by the third terminal device, with guard bands between them. Therefore, signals sent by the network device to the second terminal device and signals sent by the network device to the third terminal device may both interfere with the signal of the first terminal device. The first signal received by the first terminal device simultaneously includes signals sent to the first terminal device by the network device, signals sent to the second terminal device by the network device, and signals sent to the third terminal device by the network device. After bandpass filtering the first signal, the first terminal device obtains a second signal within the first frequency band. The second signal may include interference signals related to the second terminal device located at the low-frequency end of the first frequency band, and interference signals related to the third terminal device located at the high-frequency end of the first frequency band. At this point, the terminal device needs to simultaneously filter the interference items related to the second terminal device (e.g., the aforementioned...). The first signal is calculated, along with interference terms related to the third terminal device, and removed from the first signal to obtain the output signal after IFFT corresponding to the first terminal device. This output signal is then processed by FFT and the second vector matrix. Restore the data of the first terminal device itself. For a detailed description of the calculation method and related parameters of the interference items related to the third terminal device, please refer to the aforementioned description of the interference items related to the second terminal device. For the sake of brevity, it will not be repeated here.

[0092] By adopting the technical solution of the embodiments of this application, in a multi-user AFDM system, since different users use different subcarriers, the AFDM parameters of different users are different. When performing downlink detection, by obtaining the signal processing parameters related to each user, the interference caused by each user can be effectively removed, thereby ensuring reception performance and without causing large signaling overhead.

[0093] The above combination Figures 1 to 5 The method embodiments of this application are described in detail below, in conjunction with... Figures 6 to 8 The present application provides a detailed description of the apparatus embodiments. It should be understood that the descriptions of the method embodiments correspond to the descriptions of the apparatus embodiments; therefore, any parts not described in detail can be found in the foregoing method embodiments.

[0094] Figure 6 This is a schematic diagram of the structure of a terminal device provided in an embodiment of this application. Figure 6 The terminal device 600 shown is, for example, the first terminal device described above, and may include a transceiver unit 610 and a processing unit 620. The transceiver unit 610 is used to receive a first signal transmitted by a network device, the first signal having an AFDM waveform; the processing unit 620 is used to remove the interference signal from the first signal according to signal processing parameters related to the interference signal.

[0095] In some implementations, the signal processing parameters are sent by the network device; or, the signal processing parameters are predefined; or, a portion of the signal processing parameters are sent by the network device, and another portion are predefined.

[0096] In some implementations, the interference signal includes a portion of the third signal sent by the network device to the second terminal device, and the signal processing parameters include signal processing parameters related to the second terminal device.

[0097] In some implementations, the processing unit 620 is specifically used to: perform bandpass filtering on the first signal to obtain a second signal in a first frequency band, wherein the first frequency band includes the frequency band corresponding to the first terminal device and the frequency band corresponding to the interference signal; and remove the interference signal from the second signal according to the signal processing parameters.

[0098] In some implementations, the interference signal includes a portion of the third signal falling within a first frequency band, where the first frequency band is the band in which the terminal device performs bandpass filtering on the first signal. The signal processing parameters include one or more of the following: a first parameter related to the third signal; a second parameter related to the third signal; a first vector matrix related to the third signal; elements in the second vector matrix related to the third signal that are related to the interference signal; the modulation symbol corresponding to the interference signal; the dot product result between the modulation symbol corresponding to the interference signal and the elements in the second vector matrix related to the interference signal; and frequency domain information corresponding to the interference signal. The first and second parameters are both related to the scan slope of the chirped signal used to generate the AFDM waveform. The first vector matrix is ​​a diagonal matrix generated based on the first parameter, and the second vector matrix is ​​a diagonal matrix generated based on the second parameter. The first vector matrix is ​​used to perform a dot product with the time-domain signal output by the IFFT, and the second vector matrix is ​​used to perform a dot product with the modulation symbol corresponding to the third signal to form the input to the IFFT.

[0099] In some implementations, the frequency domain information of the interference signal includes: information on the frequency domain bandwidth of the interference signal; and / or, information on the frequency domain location of the interference signal.

[0100] In some implementations, the first parameter includes: ;in, For the first parameter, The sweep frequency of the chirped signal. For sampling time; and / or, the first vector matrix includes: , ;in, Let be the first vector matrix. For the first parameter, The number of discrete sampling points; and / or, the second parameter includes: ;in, For the second parameter, The sweep frequency of the chirped signal. For sampling time; and / or, the second vector matrix includes: , ;in, This is the second vector matrix. For the second parameter, This represents the number of discrete sampling points.

[0101] In some implementations, the interference signal includes a portion of the third signal falling within a first frequency band, where the first frequency band is the band in which the terminal device performs bandpass filtering on the first signal. The second signal obtained by bandpass filtering the first signal includes: + ; and / or, the interference items in the second signal related to the interference signal include: ;in, This is a first vector matrix associated with the first terminal device. Including a first vector matrix associated with the third signal, =IFFT( ), =IFFT( X1 is the modulation symbol of the first terminal device, and X2 is the modulation symbol corresponding to the interference signal. This is the second vector matrix associated with the first terminal device. It includes elements in a second vector matrix related to the interference signal that are associated with the third signal.

[0102] In some implementations, the interference signal includes a portion of the third signal that falls within a first frequency band, where the first frequency band is the band in which the terminal device performs bandpass filtering on the first signal. The transceiver unit is further configured to: report capability information to the network device, the capability information including frequency domain information corresponding to the interference signal.

[0103] In some implementations, the transceiver unit 610 is further configured to: receive request information sent by the network device, the request information being used to request the first terminal device to report the capability information.

[0104] It is understood that the transceiver unit 610 may be, for example, a transceiver 830, and the processing unit 620 may be, for example, a processor 810. Optionally, the terminal device 600 further includes a memory 820, for example, such as... Figure 8 As shown.

[0105] Figure 7 This is a schematic diagram of the network device provided in an embodiment of this application. Figure 7 The network device 700 shown may include a transceiver unit 710. The transceiver unit 710 is used for transmitting a first signal to a first terminal device, the first signal having an analog radio frequency division multiplexing (AFDM) waveform. The transceiver unit is further configured to send signal processing parameters related to the interference signal to the first terminal device, the signal processing parameters being used by the first terminal device to remove the interference signal from the first signal.

[0106] In some implementations, the signal processing parameters are sent by the network device; or, the signal processing parameters are predefined; or, a portion of the signal processing parameters are sent by the network device, and another portion are predefined.

[0107] In some implementations, the interference signal includes a portion of the third signal sent by the network device to the second terminal device, and the signal processing parameters include signal processing parameters related to the second terminal device.

[0108] In some implementations, the signal processing parameters are used by the first terminal device to remove the interference signal from the second signal. The second signal is a signal within a first frequency band obtained by the first terminal device through bandpass filtering of the first signal. The first frequency band includes the frequency band corresponding to the first terminal device and the frequency band corresponding to the interference signal.

[0109] In some implementations, the interference signal includes a portion of the third signal falling within a first frequency band, where the first frequency band is the band in which the terminal device performs bandpass filtering on the first signal. The signal processing parameters include one or more of the following: a first parameter related to the third signal; a second parameter related to the third signal; a first vector matrix related to the third signal; elements in the second vector matrix related to the third signal that are related to the interference signal; the modulation symbol corresponding to the interference signal; the dot product result between the modulation symbol corresponding to the interference signal and the elements in the second vector matrix related to the interference signal; and frequency domain information corresponding to the interference signal. The first and second parameters are both related to the scan slope of the chirped signal used to generate the AFDM waveform. The first vector matrix is ​​a diagonal matrix generated based on the first parameter, and the second vector matrix is ​​a diagonal matrix generated based on the second parameter. The first vector matrix is ​​used to perform a dot product with the time-domain signal output by the IFFT, and the second vector matrix is ​​used to perform a dot product with the modulation symbol corresponding to the third signal to form the input to the IFFT.

[0110] In some implementations, the information includes the frequency domain bandwidth of the interference signal; and / or the frequency domain location of the interference signal.

[0111] In some implementations, the first parameter includes: ;in, For the first parameter, The sweep frequency of the chirped signal. For sampling time; and / or, the first vector matrix includes: , ;in, Let be the first vector matrix. For the first parameter, The number of discrete sampling points; and / or, the second parameter includes: ;in, For the second parameter, The sweep frequency of the chirped signal. For sampling time; and / or, the second vector matrix includes: , ;in, This is the second vector matrix. For the second parameter, This represents the number of discrete sampling points.

[0112] In some implementations, the interference signal includes a portion of the third signal falling within a first frequency band, where the first frequency band is the band in which the terminal device performs bandpass filtering on the first signal. The second signal obtained by bandpass filtering the first signal includes: + ; and / or, the interference items in the second signal related to the interference signal include: ;in, This is a first vector matrix associated with the first terminal device. Including a first vector matrix associated with the third signal, =IFFT( ), =IFFT( X1 is the modulation symbol of the first terminal device, and X2 is the modulation symbol corresponding to the interference signal. This is the second vector matrix associated with the first terminal device. It includes elements in a second vector matrix related to the interference signal that are associated with the third signal.

[0113] In some implementations, the interference signal includes a portion of the third signal that falls within a first frequency band, where the first frequency band is the band in which the terminal device performs bandpass filtering on the first signal. The transceiver unit 710 is further configured to: receive capability information reported by the first terminal device, the capability information including frequency domain information corresponding to the interference signal.

[0114] In some implementations, the transceiver unit 710 is further configured to: send request information to the first terminal device, the request information being used to request the first terminal device to report the capability information.

[0115] It is understood that the transceiver unit 710 may be, for example, a transceiver 830. Optionally, the network device 700 also includes a processor 810 and a memory 820, for example, as... Figure 8 As shown.

[0116] Figure 8 This is a schematic structural diagram of a communication apparatus according to an embodiment of this application. Figure 8 The dashed lines shown indicate that the unit or module is optional. The device 800 can be used to implement the methods described in the above method embodiments. The device 800 may be, for example, a chip, a terminal device, or a network device.

[0117] The apparatus 800 may include one or more processors 810. The processors 810 may support the apparatus 800 in implementing the methods described in the foregoing method embodiments. The processor 810 may be a general-purpose processor or a special-purpose processor. For example, the processor 810 may be a central processing unit (CPU). Alternatively, the processor 810 may also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0118] The apparatus 800 may further include one or more memories 820. The memories 820 store programs that can be executed by the processor 810, causing the processor 810 to perform the methods described in the above method embodiments. The memories 820 may be independent of the processor 810, or they may be integrated into the processor 810.

[0119] The device 800 may also include a transceiver 830. The processor 810 can communicate with other devices or chips via the transceiver 830. For example, the processor 810 can send and receive data with other devices or chips via the transceiver 830.

[0120] This application also provides a communication system. The communication system includes the terminal device and network device described above. In some implementations, the system further includes other devices that interact with the terminal device and network device.

[0121] This application also provides a computer-readable storage medium for storing a program. This computer-readable storage medium can be applied to a terminal device or network device provided in the embodiments of this application, and the program causes a computer to execute the methods performed by the terminal device or network device in the various embodiments of this application.

[0122] This application also provides a computer program product. The computer program product includes a program. This computer program product can be applied to the terminal device or network device provided in this application embodiment, and the program causes a computer to execute the methods performed by the terminal device or network device in this application embodiment.

[0123] This application also provides a computer program. This computer program can be applied to the terminal device or network device provided in the embodiments of this application, and the computer program causes the computer to execute the methods performed by the terminal device or network device in the various embodiments of this application.

[0124] It should be understood that the terms "system" and "network" in the embodiments of this application can be used interchangeably. Furthermore, the terminology used in this application is only for explaining specific embodiments of this application and is not intended to limit this application. The terms "first," "second," and "third," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. In addition, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0125] In this embodiment of the application, the "instruction" can be a direct instruction, an indirect instruction, or an indication of a relationship. For example, A instructing B can mean that A directly instructs B, such as B being able to obtain information through A; it can also mean that A indirectly instructs B, such as A instructing C, so B can obtain information through C; or it can mean that there is a relationship between A and B.

[0126] In the embodiments of this application, "B corresponding to A" means that B is associated with A, and B can be determined based on A. It should also be understood that determining B based on A does not mean determining B solely based on A; B can also be determined based on A and / or other information.

[0127] In the embodiments of this application, the term "correspondence" can indicate a direct or indirect correspondence between two things, or an association between two things, or a relationship of instruction and being instructed, configuration and being configured, etc.

[0128] In this embodiment of the application, "predefined" or "preconfigured" can be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in the communication device. This embodiment of the application does not limit the specific implementation method. For example, predefined can refer to what is defined or agreed upon in the protocol.

[0129] In this application embodiment, the term "protocol" may refer to standard protocols in the field of communication, such as LTE protocol, NR protocol, and related protocols applied in future communication systems. This application embodiment does not limit this.

[0130] In this embodiment, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three possibilities: A alone, A and B simultaneously, or B alone. Additionally, in this embodiment, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0131] In the embodiments of this application, the order of the above processes 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.

[0132] The systems, apparatuses, and methods disclosed in the embodiments of this application 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. In addition, the coupling or direct coupling or communication connection between the shown or discussed units may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0133] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in the same position or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the solution in the embodiments of this application, depending on actual needs.

[0134] In addition, the functional units mentioned in the embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0135] 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. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any usable medium that a computer can read or a data storage device such as a server or data center that integrates one or more usable media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., digital video discs (DVDs)), or semiconductor media (e.g., solid-state disks (SSDs)).

[0136] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A communication method, characterized in that, The method includes: A first terminal device receives a first signal sent by a network device, the first signal having an analog radio frequency division multiplexing modulation (AFDM) waveform. The first terminal device removes the interference signal from the first signal based on signal processing parameters related to the interference signal.

2. The method according to claim 1, characterized in that, The signal processing parameters are sent by the network device; or, The signal processing parameters are predefined; or... Some of the signal processing parameters are sent by the network device, while others are predefined.

3. The method according to claim 1 or 2, characterized in that, The interference signal includes a portion of the third signal sent by the network device to the second terminal device, and the signal processing parameters include signal processing parameters related to the second terminal device.

4. The method according to any one of claims 1 to 3, characterized in that, The first terminal device removes the interference signal from the first signal based on signal processing parameters related to the interference signal, including: The first terminal device performs bandpass filtering on the first signal to obtain a second signal within a first frequency band, wherein the first frequency band includes the frequency band corresponding to the first terminal device and the frequency band corresponding to the interference signal; The first terminal device removes the interference signal from the second signal according to the signal processing parameters.

5. The method according to any one of claims 1 to 4, characterized in that, The interference signal includes the portion of the third signal that falls within the first frequency band, where the first frequency band is the band in which the terminal device performs bandpass filtering on the first signal. The signal processing parameters include one or more of the following: The first parameter associated with the third signal; The second parameter associated with the third signal; The first vector matrix associated with the third signal; The elements in the second vector matrix associated with the third signal that are related to the interference signal; The modulation symbol corresponding to the interference signal; The dot product between the modulation symbol corresponding to the interference signal and the elements in the second vector matrix related to the interference signal; The frequency domain information corresponding to the interference signal; Wherein, both the first parameter and the second parameter are related to the scan slope of the chirped signal used to generate the AFDM waveform, the first vector matrix is ​​a diagonal matrix generated according to the first parameter, the second vector matrix is ​​a diagonal matrix generated according to the second parameter, the first vector matrix is ​​used to perform a dot product with the time-domain signal output by the IFFT, and the second vector matrix is ​​used to perform a dot product with the modulation symbol corresponding to the third signal to form the input of the IFFT.

6. The method according to claim 5, characterized in that, The frequency domain information of the interference signal includes: Information on the frequency domain bandwidth of the interference signal; and / or, Information about the frequency domain location of the interference signal.

7. The method according to claim 5 or 6, characterized in that, The first parameter includes: ;in, For the first parameter, The sweep frequency of the chirped signal. For sampling time; and / or, The first vector matrix includes: , ;in, Let be the first vector matrix. For the first parameter, The number of discrete sampling points; and / or, The second parameter includes: ;in, For the second parameter, The sweep frequency of the chirped signal. For sampling time; and / or, The second vector matrix includes: , ;in, This is the second vector matrix. For the second parameter, This represents the number of discrete sampling points.

8. The method according to any one of claims 1 to 7, characterized in that, The interference signal includes the portion of the third signal that falls within the first frequency band, where the first frequency band is the band in which the terminal device performs bandpass filtering on the first signal. The second signal obtained by bandpass filtering the first signal includes: + ; and / or, The interference items in the second signal that are related to the interference signal include: ; in, This is a first vector matrix associated with the first terminal device. Including a first vector matrix associated with the third signal, =IFFT( ), =IFFT( X1 is the modulation symbol of the first terminal device, and X2 is the modulation symbol corresponding to the interference signal. This is the second vector matrix associated with the first terminal device. It includes elements in a second vector matrix related to the interference signal that are associated with the third signal.

9. The method according to any one of claims 1 to 8, characterized in that, The interference signal includes the portion of the third signal that falls within the first frequency band, where the first frequency band is the band in which the terminal device performs bandpass filtering on the first signal. The method further includes: The first terminal device reports capability information to the network device, the capability information including frequency domain information corresponding to the interference signal.

10. The method according to claim 9, characterized in that, The method further includes: The first terminal device receives a request message sent by the network device, the request message being used to request the first terminal device to report the capability information.

11. A communication method, characterized in that, The method includes: The network device sends a first signal to the first terminal device, the first signal having an AFDM (Analog Radio Division Multiplexing) waveform. The network device sends signal processing parameters related to the interference signal to the first terminal device, and the signal processing parameters are used by the first terminal device to remove the interference signal from the first signal.

12. The method according to claim 11, characterized in that, The signal processing parameters are sent by the network device; or, The signal processing parameters are predefined; or... Some of the signal processing parameters are sent by the network device, while others are predefined.

13. The method according to claim 11 or 12, characterized in that, The interference signal includes a portion of the third signal sent by the network device to the second terminal device, and the signal processing parameters include signal processing parameters related to the second terminal device.

14. The method according to any one of claims 11 to 13, characterized in that, The signal processing parameters are used by the first terminal device to remove the interference signal from the second signal. The second signal is a signal in a first frequency band obtained by the first terminal device through bandpass filtering of the first signal. The first frequency band includes the frequency band corresponding to the first terminal device and the frequency band corresponding to the interference signal.

15. The method according to any one of claims 11 to 14, characterized in that, The interference signal includes the portion of the third signal that falls within the first frequency band, where the first frequency band is the band in which the terminal device performs bandpass filtering on the first signal. The signal processing parameters include one or more of the following: The first parameter associated with the third signal; The second parameter associated with the third signal; The first vector matrix associated with the third signal; The elements in the second vector matrix associated with the third signal that are related to the interference signal; The modulation symbol corresponding to the interference signal; The dot product between the modulation symbol corresponding to the interference signal and the elements in the second vector matrix related to the interference signal; The frequency domain information corresponding to the interference signal; Wherein, both the first parameter and the second parameter are related to the scan slope of the chirped signal used to generate the AFDM waveform, the first vector matrix is ​​a diagonal matrix generated according to the first parameter, the second vector matrix is ​​a diagonal matrix generated according to the second parameter, the first vector matrix is ​​used to perform a dot product with the time-domain signal output by the IFFT, and the second vector matrix is ​​used to perform a dot product with the modulation symbol corresponding to the third signal to form the input of the IFFT.

16. The method according to claim 15, characterized in that, The frequency domain information of the interference signal includes: Information on the frequency domain bandwidth of the interference signal; and / or, Information about the frequency domain location of the interference signal.

17. The method according to claim 15 or 16, characterized in that, The first parameter includes: ;in, For the first parameter, The sweep frequency of the chirped signal. For sampling time; and / or, The first vector matrix includes: , ;in, Let be the first vector matrix. For the first parameter, The number of discrete sampling points; and / or, The second parameter includes: ;in, For the second parameter, The sweep frequency of the chirped signal. For sampling time; and / or, The second vector matrix includes: , ;in, This is the second vector matrix. For the second parameter, This represents the number of discrete sampling points.

18. The method according to any one of claims 11 to 17, characterized in that, The interference signal includes the portion of the third signal that falls within the first frequency band, where the first frequency band is the band in which the terminal device performs bandpass filtering on the first signal. The second signal obtained by bandpass filtering the first signal includes: + ; and / or, The interference items in the second signal that are related to the interference signal include: ; in, This is a first vector matrix associated with the first terminal device. Including a first vector matrix associated with the third signal, =IFFT( ), =IFFT( X1 is the modulation symbol of the first terminal device, and X2 is the modulation symbol corresponding to the interference signal. This is the second vector matrix associated with the first terminal device. It includes elements in a second vector matrix related to the interference signal that are associated with the third signal.

19. The method according to any one of claims 11 to 18, characterized in that, The interference signal includes the portion of the third signal that falls within the first frequency band, where the first frequency band is the band in which the terminal device performs bandpass filtering on the first signal. The method further includes: The network device receives capability information reported by the first terminal device, the capability information including frequency domain information corresponding to the interference signal.

20. The method according to claim 19, characterized in that, The method further includes: The network device sends a request message to the first terminal device, the request message being used to request the first terminal device to report the capability information.

21. A terminal device, characterized in that, The terminal device is a first terminal device, comprising: The transceiver unit is used to receive a first signal sent by a network device, the first signal having an analog radio frequency division multiplexing modulation (AFDM) waveform; The processing unit is configured to remove the interference signal from the first signal based on signal processing parameters associated with the interference signal.

22. The terminal device according to claim 21, characterized in that, The signal processing parameters are sent by the network device; or, The signal processing parameters are predefined; or... Some of the signal processing parameters are sent by the network device, while others are predefined.

23. The terminal device according to claim 21 or 22, characterized in that, The interference signal includes a portion of the third signal sent by the network device to the second terminal device, and the signal processing parameters include signal processing parameters related to the second terminal device.

24. The terminal device according to any one of claims 21 to 23, characterized in that, The processing unit is specifically used for: The first signal is bandpass filtered to obtain a second signal in the first frequency band, wherein the first frequency band includes the frequency band corresponding to the first terminal device and the frequency band corresponding to the interference signal; The interference signal is removed from the second signal according to the signal processing parameters.

25. The terminal device according to any one of claims 21 to 24, characterized in that, The interference signal includes the portion of the third signal that falls within the first frequency band, where the first frequency band is the band in which the terminal device performs bandpass filtering on the first signal. The signal processing parameters include one or more of the following: The first parameter associated with the third signal; The second parameter associated with the third signal; The first vector matrix associated with the third signal; The elements in the second vector matrix associated with the third signal that are related to the interference signal; The modulation symbol corresponding to the interference signal; The dot product between the modulation symbol corresponding to the interference signal and the elements in the second vector matrix related to the interference signal; The frequency domain information corresponding to the interference signal; Wherein, both the first parameter and the second parameter are related to the scan slope of the chirped signal used to generate the AFDM waveform, the first vector matrix is ​​a diagonal matrix generated according to the first parameter, the second vector matrix is ​​a diagonal matrix generated according to the second parameter, the first vector matrix is ​​used to perform a dot product with the time-domain signal output by the IFFT, and the second vector matrix is ​​used to perform a dot product with the modulation symbol corresponding to the third signal to form the input of the IFFT.

26. The terminal device according to claim 25, characterized in that, The frequency domain information of the interference signal includes: Information on the frequency domain bandwidth of the interference signal; and / or, Information about the frequency domain location of the interference signal.

27. The terminal device according to claim 25 or 26, characterized in that, The first parameter includes: ;in, For the first parameter, The sweep frequency of the chirped signal. For sampling time; and / or, The first vector matrix includes: , ;in, Let be the first vector matrix. For the first parameter, The number of discrete sampling points; and / or, The second parameter includes: ;in, For the second parameter, The sweep frequency of the chirped signal. For sampling time; and / or, The second vector matrix includes: , ;in, This is the second vector matrix. For the second parameter, This represents the number of discrete sampling points.

28. The terminal device according to any one of claims 21 to 27, characterized in that, The interference signal includes the portion of the third signal that falls within the first frequency band, where the first frequency band is the band in which the terminal device performs bandpass filtering on the first signal. The second signal obtained by bandpass filtering the first signal includes: + ; and / or, The interference items in the second signal that are related to the interference signal include: ; in, This is a first vector matrix associated with the first terminal device. Including a first vector matrix associated with the third signal, =IFFT( ), =IFFT( X1 is the modulation symbol of the first terminal device, and X2 is the modulation symbol corresponding to the interference signal. This is the second vector matrix associated with the first terminal device. It includes elements in a second vector matrix related to the interference signal that are associated with the third signal.

29. The terminal device according to any one of claims 21 to 28, characterized in that, The interference signal includes the portion of the third signal that falls within the first frequency band, where the first frequency band is the band in which the terminal device performs bandpass filtering on the first signal. The transceiver unit is further configured to: The network device reports capability information, which includes frequency domain information corresponding to the interference signal.

30. The terminal device according to claim 29, characterized in that, The transceiver unit is also used for: The system receives a request message sent by the network device, the request message being used to request the first terminal device to report the capability information.

31. A network device, characterized in that, include: The transceiver unit is used to send a first signal to a first terminal device, the first signal having an analog radio frequency division multiplexing modulation (AFDM) waveform; The transceiver unit is further configured to send signal processing parameters related to the interference signal to the first terminal device, the signal processing parameters being used by the first terminal device to remove the interference signal from the first signal.

32. The network device according to claim 31, characterized in that, The signal processing parameters are sent by the network device; or, The signal processing parameters are predefined; or... Some of the signal processing parameters are sent by the network device, while others are predefined.

33. The network device according to claim 31 or 32, characterized in that, The interference signal includes a portion of the third signal sent by the network device to the second terminal device, and the signal processing parameters include signal processing parameters related to the second terminal device.

34. The network device according to any one of claims 31 to 33, characterized in that, The signal processing parameters are used by the first terminal device to remove the interference signal from the second signal. The second signal is a signal in a first frequency band obtained by the first terminal device through bandpass filtering of the first signal. The first frequency band includes the frequency band corresponding to the first terminal device and the frequency band corresponding to the interference signal.

35. The network device according to any one of claims 31 to 34, characterized in that, The interference signal includes the portion of the third signal that falls within the first frequency band, where the first frequency band is the band in which the terminal device performs bandpass filtering on the first signal. The signal processing parameters include one or more of the following: The first parameter associated with the third signal; The second parameter associated with the third signal; The first vector matrix associated with the third signal; The elements in the second vector matrix associated with the third signal that are related to the interference signal; The modulation symbol corresponding to the interference signal; The dot product between the modulation symbol corresponding to the interference signal and the elements in the second vector matrix related to the interference signal; The frequency domain information corresponding to the interference signal; Wherein, both the first parameter and the second parameter are related to the scan slope of the chirped signal used to generate the AFDM waveform, the first vector matrix is ​​a diagonal matrix generated according to the first parameter, the second vector matrix is ​​a diagonal matrix generated according to the second parameter, the first vector matrix is ​​used to perform a dot product with the time-domain signal output by the IFFT, and the second vector matrix is ​​used to perform a dot product with the modulation symbol corresponding to the third signal to form the input of the IFFT.

36. The network device according to claim 35, characterized in that, The frequency domain information of the interference signal includes: Information on the frequency domain bandwidth of the interference signal; and / or, Information about the frequency domain location of the interference signal.

37. The network device according to claim 35 or 36, characterized in that, The first parameter includes: ;in, For the first parameter, The sweep frequency of the chirped signal. For sampling time; and / or, The first vector matrix includes: , ;in, Let be the first vector matrix. For the first parameter, The number of discrete sampling points; and / or, The second parameter includes: ;in, For the second parameter, The sweep frequency of the chirped signal. For sampling time; and / or, The second vector matrix includes: , ;in, This is the second vector matrix. For the second parameter, This represents the number of discrete sampling points.

38. The network device according to any one of claims 31 to 37, characterized in that, The interference signal includes the portion of the third signal that falls within the first frequency band, where the first frequency band is the band in which the terminal device performs bandpass filtering on the first signal. The second signal obtained by bandpass filtering the first signal includes: + ; and / or, The interference items in the second signal that are related to the interference signal include: ; in, This is a first vector matrix associated with the first terminal device. Including a first vector matrix associated with the third signal, =IFFT( ), =IFFT( X1 is the modulation symbol of the first terminal device, and X2 is the modulation symbol corresponding to the interference signal. This is the second vector matrix associated with the first terminal device. It includes elements in a second vector matrix related to the interference signal that are associated with the third signal.

39. The network device according to any one of claims 31 to 38, characterized in that, The interference signal includes the portion of the third signal that falls within the first frequency band, where the first frequency band is the band in which the terminal device performs bandpass filtering on the first signal. The transceiver unit is further configured to: The system receives capability information reported by the first terminal device, the capability information including frequency domain information corresponding to the interference signal.

40. The network device according to claim 39, characterized in that, The transceiver unit is also used for: A request message is sent to the first terminal device, the request message being used to request the first terminal device to report the capability information.

41. A terminal device, characterized in that, The device includes a transceiver, a memory, and a processor. The memory stores a program, and the processor invokes the program in the memory and controls the transceiver to receive or send signals so that the terminal device performs the method according to any one of claims 1 to 10.

42. A network device, characterized in that, The device includes a transceiver, a memory, and a processor. The memory stores a program, and the processor invokes the program in the memory and controls the transceiver to receive or transmit signals so that the network device performs the method according to any one of claims 11 to 20.

43. An apparatus, characterized in that, Includes a processor for calling a program from memory to cause the apparatus to perform the method according to any one of claims 1 to 10, or the method according to any one of claims 11 to 20.

44. A chip, characterized in that, Includes a processor for calling a program from memory, causing a device on which the chip is mounted to perform the method according to any one of claims 1 to 10, or the method according to any one of claims 11 to 20.

45. A computer-readable storage medium, characterized in that, It contains a program that causes a computer to perform the method according to any one of claims 1 to 10, or the method according to any one of claims 11 to 20.

46. ​​A computer program product, characterized in that, Includes a program that causes a computer to perform the method according to any one of claims 1 to 10, or the method according to any one of claims 11 to 20.

47. A computer program, characterized in that, The computer program causes the computer to perform the method according to any one of claims 1 to 10, or the method according to any one of claims 11 to 20.

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