Signal processing method, time delay reference point indication method, device and equipment

Abstract

The invention discloses a signal processing method, a time delay reference point indication method, a device and equipment, and belongs to the technical field of communication, and the signal processing method comprises the steps that first equipment obtains a first reference point, and the first reference point is used for time delay spectrum alignment processing; the first device performs time delay alignment processing on a first time delay spectrum based on the first reference point; wherein the first time delay spectrum is determined by a first device based on a received first signal, and the first signal is a signal sent by a second device.

Description

Technical Field

[0001] This application belongs to the field of communication technologies, and particularly relates to a signal processing method, a time delay reference point indication method, an apparatus, and a device. Background Art

[0002] In communication perception integration, when the signal sending end and the signal receiving end of the perception signal are not the same device, the sending end and the receiving end respectively use the internal frequency sources of the devices to generate sampling clock signals for sampling the perception signal. In the process of suppressing the sampling timing deviation between devices based on the round-trip measurement method, both devices can act as a signal sending end or a signal receiving end. For example, device 1 sends a signal to device 2, and device 2 sends a signal to device 1. By performing signal processing on the signals sent by the two devices, delay information can be extracted, and further joint processing of the delay information can obtain the signal propagation delay. However, due to the influence of sampling clock drift, the actual sampling timing deviation between the signal sending end and the signal receiving end will change over time, which causes the delay spectra measured at each time point to be misaligned, and the resulting round-trip measurement results will have a large error. Summary of the Invention

[0003] Embodiments of this application provide a signal processing method, a time delay reference point indication method, an apparatus, and a device, which can solve the problem of large errors in the estimated results of the propagation delay of the perception signal.

[0004] In a first aspect, a signal processing method is provided, which is executed by a first device. The method includes:

[0005] The first device obtains a first reference point, where the first reference point is used for time delay spectrum alignment processing;

[0006] The first device performs time delay alignment processing on a first time delay spectrum based on the first reference point;

[0007] Wherein, the first time delay spectrum is determined by the first device based on a received first signal, and the first signal is a signal sent by a second device

[0008] In a second aspect, a signal processing method is provided, which is executed by a second device. The method includes:

[0009] The second device obtains a second reference point, where the second reference point is used for time delay spectrum alignment processing;

[0010] The second device performs time delay alignment processing on a second time delay spectrum based on the second reference point;

[0011] Wherein, the second time delay spectrum is determined by the second device based on a received second signal, and the second signal is a signal sent by a first device.

[0012] In a third aspect, a method for indicating a time delay reference point is provided, which is executed by a third device. The method includes:

[0013] The third device determines a first reference point based on a first rule and / or determines a second reference point based on a second rule;

[0014] The third device sends configuration information of the first reference point to a first device and / or sends configuration information of the second reference point to a second device;

[0015] Wherein, the first reference point is used for the first device to perform time delay alignment processing on a first time delay spectrum, the first time delay spectrum is determined by the first device based on a received first signal, and the first signal is a signal sent by the second device;

[0016] The second reference point is used for the second device to perform time delay alignment processing on a second time delay spectrum, the second time delay spectrum is determined by the second device based on a received second signal, and the second signal is a signal sent by the first device.

[0017] In a fourth aspect, a signal processing device is provided, which is applied to a first device. The device includes:

[0018] A first acquisition module, configured to acquire a first reference point, where the first reference point is used for time delay spectrum alignment processing;

[0019] A first processing module, configured to perform time delay alignment processing on a first time delay spectrum based on the first reference point;

[0020] Wherein, the first time delay spectrum is determined by the first device based on a received first signal, and the first signal is a signal sent by the second device.

[0021] In a fifth aspect, a signal processing device is provided, which is applied to a second device. The device includes:

[0022] A second acquisition module, configured to acquire a second reference point, where the second reference point is used for time delay spectrum alignment processing;

[0023] A second processing module, configured to perform time delay alignment processing on a second time delay spectrum based on the second reference point;

[0024] Wherein, the second time delay spectrum is determined by the second device based on a received second signal, and the second signal is a signal sent by the first device.

[0025] In a sixth aspect, a time delay reference point indicating device is provided, which is applied to a third device. The device includes:

[0026] A first determination module, configured to determine a first reference point based on a first rule and / or determine a second reference point based on a second rule;

[0027] A first sending module, configured to send configuration information of the first reference point to a first device, and / or send configuration information of the second reference point to a second device;

[0028] Wherein, the first reference point is used for the first device to perform time delay alignment processing on a first time delay spectrum, the first time delay spectrum is determined by the first device based on a received first signal, and the first signal is a signal sent by the second device;

[0029] The second reference point is used for the second device to perform time delay alignment processing on a second time delay spectrum, the second time delay spectrum is determined by the second device based on a received second signal, and the second signal is a signal sent by the first device.

[0030] In a seventh aspect, a communication device is provided, which includes a processor and a memory. The memory stores a program or instruction that can run on the processor. When the program or instruction is executed by the processor, the steps of the method described in the first aspect, or the steps of the method described in the second aspect, or the steps of the method described in the third aspect are implemented.

[0031] In an eighth aspect, a communication device is provided. The communication device is the first device and includes a processor and a communication interface. The processor is configured to obtain a first reference point for time delay spectrum alignment processing; perform time delay alignment processing on a first time delay spectrum based on the first reference point; wherein, the first time delay spectrum is determined by the first device based on a received first signal, and the first signal is a signal sent by the second device.

[0032] In a ninth aspect, a communication device is provided. The communication device is the second device and includes a processor and a communication interface. The processor is configured to obtain a second reference point for time delay spectrum alignment processing; perform time delay alignment processing on a second time delay spectrum based on the second reference point; wherein, the second time delay spectrum is determined by the second device based on a received second signal, and the second signal is a signal sent by the first device

[0033] In a tenth aspect, a communication device is provided. The communication device is a third device and includes a processor and a communication interface. The processor is configured to determine a first reference point based on a first rule and / or determine a second reference point based on a second rule. The communication interface is configured to send configuration information of the first reference point to a first device and / or send configuration information of the second reference point to a second device. The first reference point is used for the first device to perform time delay alignment processing on a first time delay spectrum, which is determined by the first device based on a received first signal sent by the second device. The second reference point is used for the second device to perform time delay alignment processing on a second time delay spectrum, which is determined by the second device based on a received second signal sent by the first device.

[0034] In an eleventh aspect, a readable storage medium is provided. A program or instructions are stored on the readable storage medium. When the program or instructions are executed by a processor, the steps of the method described in the first aspect, or the steps of the method described in the second aspect, or the steps of the method described in the third aspect are implemented.

[0035] In a twelfth aspect, a communication system is provided, including: a first device, a second device, and a third device. The first device can be used to execute the steps of the method described in the first aspect, the second device can be used to execute the steps of the method described in the second aspect, and the third device can be used to execute the steps of the method described in the third aspect.

[0036] In a thirteenth aspect, a chip is provided. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is configured to run a program or instructions to implement the method described in the first aspect, or the method described in the second aspect, or the method described in the third aspect.

[0037] In a fourteenth aspect, a computer program / program product is provided. The computer program / program product is stored in a storage medium. The program / program product is executed by at least one processor to implement the steps of the signal processing method described in the first aspect, or the steps of the signal processing method described in the second aspect, or the steps of the time delay reference point indication method described in the third aspect.

[0038] In an embodiment of the present application, the first device obtains a first reference point and performs time delay alignment processing on a first time delay spectrum based on the first reference point. The first time delay spectrum is determined by the first device based on a received first signal sent by the second device. By clarifying the reference point for time delay spectrum alignment, the error brought by the sampling clock drift to the result of the round-trip measurement is minimized, improving the accuracy of subsequent signal processing. Description of the Drawings

[0039] Figure 1 It is a block diagram of a wireless communication system to which the embodiments of the present application can be applied;

[0040] Figure 2 It is one of the schematic flowcharts of the signal processing method according to the embodiments of the present application;

[0041] Figure 3 It is a schematic diagram of the implementation manner of communication perception integration according to the embodiments of the present application;

[0042] Figure 4 It is a schematic diagram of the situation where the second signal and the first signal overlap in the time domain according to the embodiments of the present application;

[0043] Figure 5 It is one of the schematic diagrams of the situation where the second signal and the first signal do not overlap in the time domain according to the embodiments of the present application;

[0044] Figure 6 It is another schematic diagram of the situation where the second signal and the first signal do not overlap in the time domain according to the embodiments of the present application;

[0045] Figure 7 It is another schematic flowchart of the signal processing method according to the embodiments of the present application;

[0046] Figure 8 It is the third schematic flowchart of the time delay reference point indication method according to the embodiments of the present application;

[0047] Figure 9 It is one of the schematic structural diagrams of the signal processing device according to the embodiments of the present application;

[0048] Figure 10 It is another schematic structural diagram of the signal processing device according to the embodiments of the present application;

[0049] Figure 11 It is the schematic structural diagram of the time delay reference point indication device according to the embodiments of the present application;

[0050] Figure 12 It is one of the schematic structural diagrams of the communication device according to the embodiments of the present application;

[0051] Figure 13 It is the schematic structural diagram of the terminal according to the embodiments of the present application;

[0052] Figure 14 It is the schematic structural diagram of the network side device according to the embodiments of the present application.

[0053] Figure 15 It is another schematic structural diagram of the communication device according to the embodiments of the present application. Detailed implementation manners

[0054] The technical solutions in the embodiments of the present application will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application belong to the scope of protection of the present application.

[0055] The terms "first", "second", etc. in the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "or" in the present application means at least one of the connected objects. For example, "A or B" covers three scenarios, namely, Scenario 1: including A and not including B; Scenario 2: including B and not including A; Scenario 3: including both A and B. The character " / " generally indicates an "or" relationship between the associated objects before and after.

[0056] The term "indication" in the present application can be either a direct indication (or an explicit indication) or an indirect indication (or an implicit indication). Among them, a direct indication can be understood as that the sender clearly tells the receiver specific information, operations to be performed, or request results, etc. in the sent indication; an indirect indication can be understood as that the receiver determines the corresponding information according to the indication sent by the sender, or makes a judgment and determines the operations to be performed or request results, etc. according to the judgment result.

[0057] It should be noted that the technology described in the embodiments of this application is not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, and can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), or other systems. The terms "system" and "network" in the embodiments of this application are often used interchangeably, and the described technology can be used not only in the systems and radio technologies mentioned above, but also in other systems and radio technologies. The following description describes the New Radio (NR) system for example purposes, and the NR terminology is used in most of the following descriptions, but these technologies can also be applied to systems other than the NR system, such as the 6th Generation (6 th Generation, 6G) communication system.

[0058] Figure 1The block diagram of a wireless communication system to which the embodiments of the present application can be applied is shown. The wireless communication system includes a terminal 11 and a network-side device 12. Among them, the terminal 11 can be a mobile phone, a tablet personal computer, a laptop computer, a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device, a flight vehicle, a vehicle user equipment (VUE), a shipborne device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), a game console, a personal computer (PC), a teller machine or a self-service machine, etc. Wearable devices include: smart watches, smart bracelets, smart earphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart ankle chains, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle user equipment can also be called a vehicle terminal, a vehicle controller, a vehicle module, a vehicle component, a vehicle chip or a vehicle unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application. The network-side device 12 can include an access network device or a core network device. Among them, the access network device can also be called a radio access network (RAN) device, a radio access network function or a radio access network unit. The access network device can include a base station, a wireless local area network (WLAN) access point (AP) or a wireless fidelity (WiFi) node, etc.Among them, the base station may be referred to as Node B (NB), Evolved Node B (eNB), the next generation Node B (gNB), New Radio Node B (NR Node B), access point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home Node B (HNB), home evolved Node B, Transmission Reception Point (TRP), or some other suitable term in the art. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiments of this application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

[0059] The core network device may include but is not limited to at least one of the following: core network node, core network function, Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (L-NEF), Binding Support Function (BSF), Application Function (AF), etc. It should be noted that in the embodiments of this application, only the core network devices in the NR system are taken as examples for introduction, and the specific types of core network devices are not limited.but not limited to at least one of the following: core network node, core network function, Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (L-NEF), Binding Support Function (BSF), Application Function (AF), Location Management Function (LMF), Gateway Mobile Location Centre (GMLC), Network Data Analytics Function (NWDAF), etc. It should be noted that in the embodiments of the present application, only the core network devices in the NR system are taken as examples for introduction, and the specific types of the core network devices are not limited.

[0060] The signal processing method, delay reference point indication method, device and equipment provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings through some embodiments and their application scenarios.

[0061] As Figure 2 shown, the embodiments of the present application provide a signal processing method applied to a first device, and the method includes:

[0062] Step 201: The first device obtains a first reference point for time delay spectrum alignment processing.

[0063] Step 202: The first device performs time delay alignment processing on the first time delay spectrum based on the first reference point.

[0064] Wherein, the first time delay spectrum is determined by the first device based on the received first signal, and the first signal is a signal sent by the second device.

[0065] In this embodiment, the first device is a device for sending a second signal and receiving a first signal. The first device may be a terminal or a network-side device, and the network-side device may be a base station. The second device is a device for sending a first signal and receiving a second signal. The second device may be a terminal or a network-side device, and the network-side device may be a base station. The second signal and the first signal may be sensing signals. The second signal and the first signal may be used for round-trip measurement between the first device and the second device, and the round-trip measurement may be used to suppress the sampling timing deviation between devices.

[0066] The second device sends a first signal, and the first device receives the first signal and measures each time point of the first signal to obtain the first time delay spectrum. The first reference point is used to indicate the reference point in the time delay spectrum alignment operation when the first device receives the first signal and performs signal processing. The first device aligns the time delay spectra of all time points of the first signal with the time delay spectrum at the first reference point, thereby reducing the error in subsequent signal processing.

[0067] The first device and the second device are respectively the receiving node and the sending node of the sensing signal. The first device and the second device may be different devices or the same device. Taking the sensing target being a car or a person as an example, as Figure 3 shown, the first device and the second device can implement the following sensing methods:

[0068] (1) The first device and the second device are the same base station, and the base station realizes self-transmitting and self-receiving sensing. In this sensing method, base station A sends a sensing signal and performs sensing measurement by receiving the echo of the sensing signal.

[0069] (2) The first device is base station A, and the second device is base station B. Base station A and base station B realize air interface sensing between base stations:

[0070] Base station A receives the sensing signal sent by base station B and performs sensing measurement.

[0071] (3) The first device is terminal A, and the second device is base station A. Uplink air interface sensing is implemented between terminal A and base station A: Terminal A receives the sensing signal sent by base station A and performs sensing measurements.

[0072] (4) The first device is base station B, and the second device is terminal B. Downlink air interface sensing is implemented between terminal B and base station B: Base station B receives the sensing signal sent by terminal B and performs sensing measurements.

[0073] (5) If the first device and the second device are the same terminal, then self-transmitting and self-receiving sensing of the terminal is implemented: Terminal A sends a sensing signal and performs sensing measurements by receiving the echo of the sensing signal.

[0074] (6) The first device is terminal A, and the second device is terminal B. Sidelink sensing between terminal A and terminal B is implemented: Terminal A receives the sensing signal sent by terminal B and performs sensing measurements.

[0075] It should be noted that the above are only examples of implementing sensing with the first device as the signal receiving node and the second device as the signal sending node. In an actual system, one or more different sensing methods can be selected according to different sensing use cases and sensing requirements, and there can be one or more sending nodes and receiving nodes for each sensing method.

[0076] In an embodiment of the present application, the first device obtains a first reference point and performs time delay alignment processing on a first time delay spectrum based on the first reference point. The first time delay spectrum is determined by the first device based on the first signal sent by the second device received. By clarifying the reference point for time delay spectrum alignment, the error brought by the sampling clock drift to the result of round-trip measurement is minimized, and the accuracy of subsequent signal processing is improved.

[0077] Optionally, the obtaining of the first reference point includes:

[0078] Receiving the configuration information of the first reference point sent by a third device and determining the first reference point according to the configuration information;

[0079] Or,

[0080] Determining the first reference point according to a first rule.

[0081] Optionally, the method further includes:

[0082] Receiving the first rule sent by a third device;

[0083] And / or

[0084] Determining the first rule according to protocol agreements.

[0085] In this embodiment, the first reference point may be configured by a third device, or determined by the first device based on a first rule. The first rule may be configured by the third device for the first device, or determined based on protocol agreements. The third device may be a sensing function network element. Specifically, the third device may be the first device or the second device, and the third device may also be a core network device. The third device may configure the information of the first reference point for the first device, and / or configure the information of the second reference point for the second device. Taking the third device as a sensing function network element as an example, the process of realizing sensing measurement among the first device, the second device, and the third device may be as Figure 3 shown.

[0086] Among them, a sensing function network element, which can also be referred to as a sensing network element or a sensing network function, may be on the radio access network (RAN) side or the core network side. It refers to a network node in the core network and / or RAN that is responsible for at least one function such as sensing request processing, sensing resource scheduling, sensing information interaction, and sensing data processing. It may be upgraded based on the access and mobility management function (AMF) or location management function (LMF) in the 5G network, or may be other network nodes or newly defined network nodes. Specifically, the functional characteristics of the sensing function network element may include at least one of the following:

[0087] (1) Perform target information interaction with a wireless signal transmitting device and / or a wireless signal measuring device (including a target terminal or the serving base station of the target terminal or a base station associated with the target area), where the target information includes a sensing processing request, sensing capabilities, sensing auxiliary data, sensing measurement type, sensing resource configuration information, etc., to obtain the value of the target sensing result or sensing measurement (uplink measurement or downlink measurement) sent by the wireless signal measuring device; among them, the wireless signal may also be referred to as a sensing signal.

[0088] (2) Determine the sensing method to be used based on factors such as the type of sensing service, sensing service consumer information, required quality of service (QoS) requirement information, sensing capabilities of the wireless signal transmitting device, and sensing capabilities of the wireless signal measuring device. The specific sensing method will not be elaborated.

[0089] (3) Determine the sensing devices serving the sensing service based on factors such as the type of sensing service, information of sensing service consumers, required sensing QoS requirement information, sensing capabilities of wireless signal transmitting devices, and sensing capabilities of wireless signal measuring devices. Among them, the sensing devices include wireless signal transmitting devices and / or wireless signal measuring devices.

[0090] (4) Manage the overall coordination and scheduling of resources required for the sensing service, such as configuring the sensing resources of the base station and / or terminal accordingly.

[0091] (5) Perform data processing on the values of sensing measurement quantities, or perform calculations to obtain sensing results. Further, it can also be used to verify sensing results, estimate sensing accuracy, etc.

[0092] Optionally, the configuration information of the first reference point includes at least one of the following:

[0093] (a) The offset of the first reference point relative to the start time of the first signal. The third device can configure the offset of the first reference point relative to the start time of the first signal for the first device, and then the first device can determine the position of the first reference point based on this offset.

[0094] Optionally, the offset can be described by at least one of the following parameters: the number of system frames (including 1024 wireless frames), the number of wireless frames (10 ms), the number of subframes (1 ms), the number of time slots, the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols.

[0095] (b) The offset of the first reference point relative to the second target time point; the second target time point can be a specific absolute time point. The third device can configure the offset of the first reference point relative to a specific absolute time point for the first device, and then the first device can determine the position of the first reference point based on this offset.

[0096] The absolute time point can be described by at least one of the following parameters: system frame number, wireless frame number, subframe number, time slot number, OFDM symbol index. The offset is described by at least one of the following parameters: the number of system frames, the number of wireless frames, the number of subframes, the number of time slots, the number of OFDM symbols.

[0097] (c) The index of the time point of the first reference point in the first signal.

[0098] The index of the time point in the first signal can include at least one of the following:

[0099] c1) The index of the OFDM symbol;

[0100] For example, if the first signal occupies the 5th OFDM symbol in each of 100 consecutive time slots in the time domain, then the first signal actually occupies 100 OFDM symbols in total. The indices of these 100 OFDM symbols can be used to indicate the first reference point. For example, if the 75th OFDM symbol among these 100 OFDM symbols is determined as the first reference point, then the OFDM symbol index is 75.

[0101] c2) The index of a Frequency Modulated Continuous Wave (FMCW) pulse;

[0102] For example, if the first signal includes 100 FMCW pulses, and the 75th FMCW pulse among these 100 FMCW pulses is determined as the first reference point, then the FMCW pulse index is 75.

[0103] c3) The index of an Ultra-Wide Band (UWB) pulse;

[0104] For example, if the first signal includes 100 UWB pulses, and the 75th UWB pulse among these 100 UWB pulses is determined as the first reference point, then the UWB pulse index is 75.

[0105] In this embodiment, when the third device configures the first reference point for the first device, the information of the first reference point configured by the third device can have the above three representation forms. The first device can determine the position of the first reference point based on the information of the first reference point configured above.

[0106] Optionally, for the case where the first device determines the first reference point according to the first rule, it can be applied when the time range of the second signal and the time range of the first signal do not overlap in the time domain. For example, when the first device determines that the time ranges of the second signal and the first signal do not overlap, the first time point or the last time point occupied by the second signal is determined as the first reference point.

[0107] As an optional embodiment, the first reference point satisfies the first rule; the first rule includes at least one of the following:

[0108] (A) If there is a time domain overlap between the first time range of the second signal sent by the first device and the second time range of the first signal, then the first reference point is a time point within the time range of the time domain overlap;

[0109] (B) If there is no time-domain overlap between the first time range of the second signal sent by the first device and the second time range of the first signal, the first reference point is a time point within the first time range that has the smallest time interval from the second time range.

[0110] In this embodiment, the first reference point should satisfy the above first rule. When there is a time-domain overlap between the time ranges of the second signal and the first signal, the first reference point should be a time point within the time range of the second signal that overlaps with the time range of the first signal. In the case where there is no time-domain overlap between the time ranges of the second signal and the first signal, the first reference point should be a time point within the time range of the second signal that has the smallest time interval from the time range of the first signal. The case where there is a time-domain overlap between the time ranges of the second signal and the first signal is as Figure 4 shown. The case where there is no time-domain overlap between the time ranges of the second signal and the first signal is as Figure 5 and Figure 6 shown.

[0111] As an alternative embodiment, when there is a time-domain overlap between the first time range and the second time range, the first rule further includes at least one of the following:

[0112] a1) If there is at least one identical time point between the time points occupied by the second signal and the time points occupied by the first signal, the first reference point belongs to the at least one identical time point;

[0113] a2) If there is no identical time point between the time points occupied by the second signal and the time points occupied by the first signal, the first reference point is: among the time pairs with the smallest time interval within the time range of the time-domain overlap, the time point belonging to the second signal, where the time pair is formed by each time point included in the second signal and each time point included in the first signal;

[0114] a3) The first reference point is the first target time point within the time range of the time-domain overlap, and the first target time point is a pre-configured or pre-defined time point.

[0115] In this embodiment, for the case where there is a time-domain overlap between the first time range and the second time range, that is, rule (A) in the above first rule, the specific method for determining the first reference point includes:

[0116] If there is at least one completely identical time point between the time points occupied by the second signal and the time points occupied by the first signal, arbitrarily determine one time from the at least one completely identical time point as the first reference point.

[0117] If there is no exactly same time point between the time points occupied by the second signal and the time points occupied by the first signal, the first reference point can be determined according to the following process:

[0118] 11): Assume that within the time range of the second signal, among the overlapping parts with the time range of the first signal, there are M time points occupied by the second signal, denoted as

[0119] 12): Assume that within the time range of the first signal, among the overlapping parts with the time range of the second signal, there are N time points occupied by the first signal, denoted respectively as

[0120] 13): Then, T should be selected from such that T i (1) , and T should be selected from such that |T j (2) - T i (1) | takes the minimum value. If there are multiple T j (2) and T i (1) that meet this condition, any one of T j (2) and T i (1) and T j (2) can be selected. Among them, the selected T i (1) is used as the first reference point.

[0121] Optionally, when there is a time domain overlap between the first time range and the second time range, the first device can also select a time point as the first reference point according to the configured or protocol - agreed principle. For example: The protocol stipulates that the first reference point is the first time point within the time range of the time domain overlap of the second signal, or the last time point within the time range of the time domain overlap of the second signal, or the middle time point within the time range of the time domain overlap of the second signal.

[0122] As an alternative embodiment, when there is no time domain overlap between the first time range and the second time range, the first rule further includes at least one of the following:

[0123] b1) If the transmission time of the second signal is before the transmission time of the first signal, the first reference point is the last time point within the first time range;

[0124] b2) If the transmission time of the second signal is after the transmission time of the first signal, then the first reference point is the first time point within the first time range.

[0125] In this embodiment, for the case where there is no time domain overlap between the first time range and the second time range, that is, rule (B) in the above first rule, the specific method for determining the first reference point includes:

[0126] If the second signal is before the first signal, the first reference point is the last time point among the time points occupied by the second signal, as Figure 5 shown;

[0127] If the second signal is after the first signal, the first reference point is the first time point among the time points occupied by the second signal, as Figure 6 shown.

[0128] As an alternative embodiment, the method further includes:

[0129] Receiving signal configuration information sent by a third device, where the signal configuration information includes at least one of the configuration information of the second signal and the configuration information of the first signal;

[0130] Sending a second signal to the second device according to the configuration information of the second signal; and / or, receiving the first signal sent by the second device according to the configuration information of the first signal.

[0131] In this embodiment, the third device may send signal configuration information to the first device and / or the second device, including at least one of the configuration information of the second signal and the configuration information of the first signal. For the first device, the configuration information of the second signal is used to instruct the first device to send the second signal, and the configuration information of the first signal is used to instruct the first device to receive the first signal. Optionally, the configuration information of the first signal may include information on all time points of the first signal; the configuration information of the second signal may include information on all time points of the second signal.

[0132] Optionally, the first device may only obtain the part of the configuration information of the second signal related to sending the second signal and the part of the configuration information of the first signal related to receiving the first signal, so as to save signaling overhead. For example, the first device does not need to obtain: the part of the configuration information of the second signal related to the antenna configuration for receiving the second signal, and the part of the configuration information of the first signal related to the transmission power of the first signal.

[0133] Optionally, the time delay alignment process for the first time delay spectrum based on the first reference point includes: in the first time delay spectrum, aligning the time delay spectra of all time points of the first signal with the time delay spectrum of the time point corresponding to the first reference point.

[0134] In this embodiment, when the first device receives the signal configuration information, it can determine the time-related information of the second signal and the time-related information of the first signal. The time-related information includes: time range, each time point within the time range, etc. Then the first device can determine whether there is an overlap between the time range of the second signal and the time range of the first signal, and thus determine the first reference point according to the overlap situation based on the above first rule, and align the time delay spectra of all time points of the first signal indicated in the configuration information of the first signal with the time delay spectrum of the first reference point.

[0135] Optionally, in the embodiments of the present application, the second device determines a second reference point in a manner similar to that of the first device, and the second device performs a time delay alignment process on the second time delay spectrum, where the second time delay spectrum is determined by the second device based on the second signal received from the first device. Wherein, when both the first reference point and the second reference point are configured by a third device, the third device can configure the first reference point and the second reference point to be the same or have the smallest time interval, so as to minimize the error brought by the sampling clock drift to the result of the round-trip measurement.

[0136] Optionally, if the second signal and / or the first signal adopt an OFDM signal waveform, then the time points in the embodiments of the present application correspond one-to-one with OFDM symbols.

[0137] Optionally, if the second signal and / or the first signal adopt a Frequency Modulated Continuous Wave (FMCW) waveform or an Ultra-Wide Band (UWB) waveform, then the time points in the embodiments of the present application correspond one-to-one with an FMCW pulse or a UWB pulse.

[0138] In the embodiments of the present application, the first device obtains a first reference point and performs a time delay alignment process on the first time delay spectrum based on the first reference point, where the first time delay spectrum is determined by the first device based on the first signal received from the second device. By clarifying the reference point for time delay spectrum alignment, the error brought by the sampling clock drift to the result of the round-trip measurement is minimized, and the accuracy of subsequent signal processing is improved.

[0139] As Figure 7 shown, the embodiments of the present application further provide a signal processing method applied to a second device, including:

[0140] Step 701, the second device obtains a second reference point, and the second reference point is used for time delay spectrum alignment processing;

[0141] Step 702, the second device performs time delay alignment processing on the second time delay spectrum based on the second reference point;

[0142] Wherein, the second time delay spectrum is determined by the second device based on the received second signal, and the second signal is the signal sent by the first device.

[0143] In this embodiment, the first device is a device for sending a first signal and receiving a second signal. The second device may be a terminal or a network-side device, and the network-side device may be a base station. The first device is a device for sending a second signal and receiving a first signal, the first device may be a terminal or a network-side device, and the network-side device may be a base station. The second signal and the first signal may be sensing signals. The second signal and the first signal may be used for round-trip measurement between the first device and the second device, and the round-trip measurement may be used to suppress the sampling timing deviation between devices. The first device and the second device are respectively the sending node and the receiving node of the sensing signal. The first device and the second device may be different devices or the same device.

[0144] The first device sends a second signal, the second device receives the second signal, and measures each time point of the second signal to obtain the second time delay spectrum. The second reference point is used to indicate the reference point in the time delay spectrum alignment operation when the second device receives the second signal and performs signal processing. The second device aligns the time delay spectra of all time points of the second signal with the time delay spectrum at the second reference point, thereby reducing the error in subsequent signal processing.

[0145] In the embodiment of the present application, the second device obtains a second reference point and performs time delay alignment processing on the second time delay spectrum based on the second reference point. The second time delay spectrum is determined by the second device based on the received second signal sent by the first device. By clarifying the reference point of time delay spectrum alignment, the error brought by the sampling clock drift to the result of round-trip measurement is minimized, and the accuracy of subsequent signal processing is improved. Using this method can minimize the time interval between the time point corresponding to the second reference point and the time point corresponding to the first reference point determined by the first device, thereby minimizing the error brought by the sampling clock drift to the result of round-trip measurement.

[0146] Optionally, the obtaining of the second reference point includes:

[0147] Receiving the configuration information of the second reference point sent by the third device, and determining the second reference point according to the configuration information;

[0148] Alternatively,

[0149] determine the second reference point according to the second rule.

[0150] The method further includes:

[0151] receiving the second rule sent by a third device;

[0152] and / or

[0153] determine the second rule according to the protocol agreement.

[0154] In this embodiment, the second reference point may be configured by a third device, or determined by the second device based on the second rule. The second rule may be configured by the third device for the second device, or determined based on the protocol agreement. The third device may be a sensing function network element. Specifically, the third device may be the first device or the second device, and the third device may also be a core network device. The third device may configure the information of the first reference point for the first device, and / or configure the information of the second reference point for the second device. Taking the third device as a sensing function network element as an example, the process of realizing sensing measurement among the first device, the second device, and the third device may be as Figure 3 shown.

[0155] Among them, the sensing function network element, which may also be referred to as a sensing network element or a sensing network function, may be on the RAN side or the core network side. It refers to a network node in the core network and / or RAN that is responsible for at least one function such as sensing request processing, sensing resource scheduling, sensing information interaction, and sensing data processing. It may be upgraded based on the AMF or LMF in the 5G network, or other network nodes or newly defined network nodes. The functional characteristics of the sensing function network element will not be elaborated here.

[0156] Optionally, the configuration information of the second reference point includes at least one of the following:

[0157] (a) The offset of the second reference point relative to the start time of the second signal;

[0158] The third device may configure the offset of the second reference point relative to the start time of the second signal for the second device, and then the second device may determine the position of the second reference point based on this offset.

[0159] Optionally, the offset may be described by at least one of the following parameters: the number of system frames (including 1024 radio frames), the number of radio frames (10 ms), the number of sub-frames (1 ms), the number of time slots, the number of OFDM symbols.

[0160] (b) The offset of the second reference point relative to the fourth target time point; the fourth target time point may be a specific absolute time point. The third device may configure for the second device the offset of the second reference point relative to a specific absolute time point, and then the second device may determine the position of the second reference point based on this offset.

[0161] The absolute time point may be described by at least one of the following parameters: system frame number, radio frame number, subframe number, time slot number, OFDM symbol index. The offset is described by at least one of the following parameters: number of system frames, number of radio frames, number of subframes, number of time slots, number of OFDM symbols.

[0162] (c) The index of the time point of the second reference point in the second signal.

[0163] The index of the time point in the second signal may include at least one of the following:

[0164] c1) Index of the OFDM symbol;

[0165] For example: If the second signal occupies the 5th OFDM symbol in each of 100 consecutive time slots in the time domain, then the second signal actually occupies 100 OFDM symbols in total. The 100 OFDM symbols' indices can be used to indicate the second reference point. For example, if the 75th OFDM symbol among these 100 OFDM symbols is determined as the first reference point, then the OFDM symbol index is 75.

[0166] c2) Index of the FMCW pulse;

[0167] For example: If the second signal includes 100 FMCW pulses, and if the 75th FMCW pulse among these 100 FMCW pulses is determined as the second reference point, then the FMCW pulse index is 75.

[0168] c3) Index of the UWB pulse;

[0169] For example: If the second signal includes 100 UWB pulses, and if the 75th UWB pulse among these 100 UWB pulses is determined as the second reference point, then the UWB pulse index is 75.

[0170] Optionally, for the case where the second device determines the second reference point according to the second rule, it can be applied to the situation where the time ranges of the first signal and the second signal do not overlap in the time domain. For example: When the second device determines that the time ranges of the first signal and the second signal do not overlap, it determines the first time point or the last time point occupied by the first signal as the second reference point.

[0171] As an alternative embodiment, the second reference point satisfies a second rule; the second rule includes at least one of the following:

[0172] (A) If there is a time-domain overlap between the second time range of the first signal transmitted by the second device and the first time range of the second signal, then the second reference point is a time point within the time range of the time-domain overlap;

[0173] (B) If there is no time-domain overlap between the second time range of the first signal transmitted by the second device and the first time range of the second signal, then the second reference point is a time point within the second time range that has the smallest time interval from the first time range.

[0174] In this embodiment, the second reference point should satisfy the above-mentioned second rule. When there is a time-domain overlap between the time ranges of the first signal and the second signal, the second reference point should be a time point within the time range of the first signal that overlaps with the time range of the second signal. In the case where there is no time-domain overlap between the time ranges of the first signal and the second signal, the second reference point should be a time point within the time range of the first signal that has the smallest time interval from the time range of the second signal. The case where there is a time-domain overlap between the time ranges of the first signal and the second signal is as Figure 4 shown. The case where there is no time-domain overlap between the time ranges of the first signal and the second signal is as Figure 5 and Figure 6 shown.

[0175] Optionally, in the case where there is a time-domain overlap between the second time range and the first time range, the second rule further includes at least one of the following:

[0176] a1) If there is at least one identical time point between the time points occupied by the first signal and the time points occupied by the second signal, then the second reference point belongs to the at least one identical time point;

[0177] a2) If there is no identical time point between the time points occupied by the first signal and the time points occupied by the second signal, then the second reference point is: among the time points within the time range of the time-domain overlap, the time point of the first signal in the time pair with the smallest time interval, where the time pair is formed by each time point included in the second signal and each time point included in the first signal;

[0178] a3) The second reference point is the third target time point within the time range of the time-domain overlap, and the third target time point is a pre-configured or pre-defined time point.

[0179] In this embodiment, for the case where there is a time-domain overlap between the second time range and the first time range, that is, rule (A) in the above-mentioned second rule, the specific method for determining the second reference point includes:

[0180] If there is at least one time point that is exactly the same between the time points occupied by the first signal and the time points occupied by the second signal, then arbitrarily determine one time from the at least one exactly the same time point as the second reference point. At this time, the first reference point determined by the first device and the second reference point determined by the second device may be exactly the same.

[0181] If there is no exactly the same time point between the time points occupied by the first signal and the time points occupied by the second signal, then the second reference point can be determined according to the following process:

[0182] 11): Assume that within the time range of the second signal, among the overlapping part with the time range of the first signal, there are M time points occupied by the second signal, denoted as

[0183] 12): Assume that within the time range of the first signal, among the overlapping part with the time range of the second signal, there are N time points occupied by the first signal, respectively denoted as

[0184] 13): Then, T should be selected from i (1) , and T should be selected from j (2) such that |T i (1) - T j (2) | takes the minimum value. If there are multiple T i (1) and T j (2) that satisfy this condition, then any one of T i (1) and T j (2) can be selected. Among them, the selected T j (2) is used as the second reference point.

[0185] Optionally, in the case where there is a time-domain overlap between the first time range and the second time range, the second device can also select a time point as the second reference point by itself according to the configured or protocol-agreed principle. For example: the protocol stipulates that the first time point in the time range of the time-domain overlap is used as the second reference point, or the last time point in the time range of the time-domain overlap is used as the second reference point, or the middle time point in the time range of the time-domain overlap is used as the second reference point.

[0186] As an optional embodiment, in the case where there is no time-domain overlap between the second time range and the first time range, the second rule further includes at least one of the following:

[0187] b1) If the transmission time of the first signal is before the transmission time of the second signal, the second reference point is the last time point within the second time range;

[0188] b2) If the transmission time of the first signal is after the transmission time of the second signal, the second reference point is the first time point within the second time range.

[0189] In this embodiment, for the case where there is no time-domain overlap between the second time range and the first time range, that is, rule (B) in the above second rule, the specific method for determining the second reference point includes:

[0190] If the first signal is before the second signal, the second reference point is the last time point among the time points occupied by the first signal, as Figure 6 shown; in this way, the time interval between the first reference point determined by the first device and the second reference point determined by the second device is minimized.

[0191] If the first signal is after the second signal, the second reference point is the first time point among the time points occupied by the first signal, as Figure 5 shown. In this way, the time interval between the first reference point determined by the first device and the second reference point determined by the second device is minimized.

[0192] As an optional embodiment, the method further includes: receiving signal configuration information sent by a third device, where the signal configuration information includes at least one of the configuration information of the second signal and the configuration information of the first signal;

[0193] Sending a first signal to the first device according to the configuration information of the first signal; and / or receiving a second signal sent by the first device according to the configuration information of the second signal.

[0194] In this embodiment, the third device may send signal configuration information to the first device and / or the second device, including at least one of the configuration information of the second signal and the configuration information of the first signal. For the second device, the configuration information of the second signal is used to instruct the second device to receive the second signal, and the configuration information of the first signal is used to instruct the second device to send the first signal. Optionally, the configuration information of the first signal may include information on all time points of the first signal, and the configuration information of the second signal may include information on all time points of the second signal.

[0195] Optionally, the second device may only obtain the part of the second signal configuration related to receiving the second signal and the part of the first signal configuration related to sending the first signal to save signaling overhead. For example, the second device does not need to obtain: the part of the second signal configuration related to the transmit power of the second signal, and the part of the first signal configuration related to the antenna configuration for receiving the first signal.

[0196] Optionally, the time-delay alignment processing of the second time-delay spectrum based on the second reference point includes: in the second time-delay spectrum, aligning the time-delay spectra of all time points of the second signal with the time-delay spectrum of the time point corresponding to the second reference point.

[0197] In this embodiment, when the second device receives the signal configuration information, it can determine the time-related information of the second signal and the time-related information of the first signal. The time-related information includes: time range, each time point within the time range, etc. Then the second device can determine whether there is an overlap between the time range of the second signal and the time range of the first signal, and thus determine the second reference point according to the overlap situation based on the above second rule, and align the time-delay spectra of all time points of the second signal indicated in the configuration information of the second signal with the time-delay spectrum of the second reference point.

[0198] Optionally, in the embodiment of the present application, the first device determines the first reference point in a manner similar to that of the second device, and the first device performs time-delay spectrum alignment on the first signal sent by the second device based on the first reference point. Wherein, when both the first reference point and the second reference point are configured by the third device, the third device may configure the first reference point and the second reference point to be the same or have the smallest time interval, so as to minimize the error brought by the sampling clock drift to the result of the round-trip measurement.

[0199] In an embodiment of the present application, a second device obtains a second reference point and performs time delay alignment processing on a second time delay spectrum based on the second reference point. The second time delay spectrum is determined by the second device based on a second signal received from a first device. By clarifying the reference point for time delay spectrum alignment, the error caused by sampling clock drift to the result of round-trip measurement can be minimized, improving the accuracy of subsequent signal processing. Using this method can minimize the time interval between the time point corresponding to the second reference point and the time point corresponding to the first reference point determined by the first device, thereby minimizing the error caused by sampling clock drift to the result of round-trip measurement.

[0200] As Figure 8 shown, an embodiment of the present application also provides a method for indicating a time delay reference point, which is applied to a third device and includes:

[0201] Step 801, the third device determines a first reference point based on a first rule and / or determines a second reference point based on a second rule;

[0202] Step 802, the third device sends configuration information of the first reference point to the first device and / or sends configuration information of the second reference point to the second device;

[0203] wherein, the first reference point is used for the first device to perform time delay alignment processing on a first time delay spectrum. The first time delay spectrum is determined by the first device based on a first signal received, and the first signal is a signal sent by the second device;

[0204] The second reference point is used for the second device to perform time delay alignment processing on a second time delay spectrum. The second time delay spectrum is determined by the second device based on a second signal received, and the second signal is a signal sent by the first device.

[0205] In this embodiment, the first device is a device for sending a first signal and receiving a second signal. The second device may be a terminal or a network-side device, and the network-side device may be a base station. The first device is a device for sending a second signal and receiving a first signal. The first device may be a terminal or a network-side device, and the network-side device may be a base station. The second signal and the first signal may be sensing signals. The second signal and the first signal may be used for round-trip measurement between the first device and the second device, and the round-trip measurement may be used to suppress the sampling timing deviation between devices. The first device and the second device may be the receiving node and the sending node of the sensing signal respectively, that is, the second device sends the sensing signal and the first device receives the sensing signal; or, the first device and the second device may be the sending node and the receiving node of the sensing signal respectively, that is, the first device sends the sensing signal and the second device receives the sensing signal. The first device and the second device may be different devices or the same device.

[0206] The third device may be a sensing functional network element. Specifically, the third device may be the first device or the second device, and the third device may also be a core network device. Among them, the sensing functional network element, also known as the sensing network element or sensing network function, may be on the RAN side or the core network side. It refers to a network node in the core network and / or RAN that is responsible for at least one function such as sensing request processing, sensing resource scheduling, sensing information interaction, and sensing data processing. It may be upgraded based on the AMF or LMF in the 5G network, or other network nodes or newly defined network nodes. The functional characteristics of the sensing functional network element will not be elaborated here.

[0207] The third device may determine a first reference point based on a first rule and send the information of the first reference point to the first device, which is used to indicate the reference point in the delay spectrum alignment operation when the first device receives the first signal and performs signal processing, that is, it is used to indicate that the first device aligns the delay spectra of all time points of the first signal with the delay spectrum at the first reference point.

[0208] And / or, the third device may determine a second reference point based on a second rule and send the information of the second reference point to the second device, which is used to indicate the reference point in the delay spectrum alignment operation when the second device receives the second signal and performs signal processing, that is, it is used to indicate that the second device aligns the delay spectra of all time points of the second signal with the delay spectrum at the second reference point. Using this method can make the time point corresponding to the second reference point the same as or minimize the time interval with the time point corresponding to the first reference point, thereby minimizing the error brought by the sampling clock drift to the result of the round-trip measurement.

[0209] Optionally, in this embodiment, the basic principle for determining the first reference point and the second reference point is to minimize the time interval between the time points indicated by the first reference point and the second reference point.

[0210] In an embodiment of the present application, a third device determines a first reference point for a first device, enabling the first device to perform time delay alignment processing on a first time delay spectrum based on the first reference point; and / or, the third device determines a second reference point for a second device, enabling the second device to perform time delay alignment processing on a second time delay spectrum based on the second reference point. The time point corresponding to the first reference point determined using this method is the same as or has the smallest time interval with the time point corresponding to the second reference point. The time delay spectrum error after the first device and the second device perform time delay spectrum alignment operations is minimized, thereby minimizing the error brought by the sampling clock drift to the result of the round-trip measurement.

[0211] Optionally, the method further includes:

[0212] Determine the first rule and / or the second rule;

[0213] Send the first rule to the first device, and / or send the second rule to the second device.

[0214] In this embodiment, the third device may determine the first rule and / or the second rule by itself, or determine the first rule and / or the second rule based on protocol agreements or pre-configurations. The third device may send the first rule and / or the second rule to the first device and / or the second device.

[0215] It should be noted that in the case where the third device does not send the configuration information of the first reference point to the first device, and / or the third device does not send the configuration information of the second reference point to the second device, the third device may also send the first rule to the first device, and / or send the second rule to the second device, so that the first device can determine the first reference point based on the first rule, and the second device can determine the second reference point based on the second rule.

[0216] Optionally, the configuration information of the first reference point includes at least one of the following:

[0217] (a) The offset of the first reference point relative to the start time of the first signal. The third device may configure the offset of the first reference point relative to the start time of the first signal for the first device, and then the first device may determine the position of the first reference point based on this offset.

[0218] Optionally, the offset can be described by at least one of the following parameters: the number of system frames (including 1024 radio frames), the number of radio frames (10 ms), the number of subframes (1 ms), the number of time slots, and the number of OFDM symbols.

[0219] (b) The offset of the first reference point relative to the second target time point; the second target time point can be a specific absolute time point. The third device may configure the offset of the first reference point relative to a specific absolute time point for the first device, and then the first device can determine the position of the first reference point based on this offset.

[0220] The absolute time point can be described by at least one of the following parameters: system frame number, radio frame number, subframe number, time slot number, and OFDM symbol index. The offset is described by at least one of the following parameters: the number of system frames, the number of radio frames, the number of subframes, the number of time slots, and the number of OFDM symbols.

[0221] (c) The index of the time point of the first reference point in the first signal.

[0222] The index of the time point in the first signal may include at least one of the following:

[0223] c1) The index of the OFDM symbol;

[0224] For example: If the first signal occupies the 5th OFDM symbol in each of the 100 consecutive time slots in the time domain, then the first signal actually occupies 100 OFDM symbols. The 100 OFDM symbol indices can be used to indicate the first reference point. For example, if the 75th OFDM symbol among these 100 OFDM symbols is determined as the first reference point, then the OFDM symbol index is 75.

[0225] c2) The index of the FMCW pulse;

[0226] For example: If the first signal includes 100 FMCW pulses, and if the 75th FMCW pulse among these 100 FMCW pulses is determined as the first reference point, then the FMCW pulse index is 75.

[0227] c3) The index of the UWB pulse;

[0228] For example: If the first signal includes 100 UWB pulses, and if the 75th UWB pulse among these 100 UWB pulses is determined as the first reference point, then the UWB pulse index is 75.

[0229] In this embodiment, when the third device configures the first reference point for the first device, the information of the first reference point configured by the third device can have the above three representation forms. The first device can determine the position of the first reference point based on the information of the first reference point configured above.

[0230] Optionally, the configuration information of the second reference point includes at least one of the following:

[0231] (a) The offset of the second reference point relative to the start time of the second signal;

[0232] The third device can configure the offset of the second reference point relative to the start time of the second signal for the second device, and the second device can determine the position of the second reference point based on this offset.

[0233] Optionally, the offset can be described by at least one of the following parameters: the number of system frames (including 1024 radio frames), the number of radio frames (10 ms), the number of sub-frames (1 ms), the number of time slots, the number of OFDM symbols.

[0234] (b) The offset of the second reference point relative to the fourth target time point; the fourth target time point can be a specific absolute time point. The third device can configure the offset of the second reference point relative to a specific absolute time point for the second device, and the second device can determine the position of the second reference point based on this offset.

[0235] The absolute time point can be described by at least one of the following parameters: system frame number, radio frame number, sub-frame number, time slot number, OFDM symbol index. The offset is described by at least one of the following parameters: the number of system frames, the number of radio frames, the number of sub-frames, the number of time slots, the number of OFDM symbols.

[0236] (c) The index of the time point of the second reference point in the second signal.

[0237] The index of the time point in the second signal can include at least one of the following:

[0238] c1) The index of the OFDM symbol;

[0239] For example: If the second signal occupies the 5th OFDM symbol in each of the 100 consecutive time slots in the time domain, then the second signal actually occupies 100 OFDM symbols. The 100 OFDM symbols can be used to indicate the second reference point. For example, if the 75th OFDM symbol among these 100 OFDM symbols is determined as the first reference point, then the OFDM symbol index is 75.

[0240] c2) The index of the FMCW pulse;

[0241] For example, the second signal includes 100 FMCW pulses. If the 75th FMCW pulse among these 100 FMCW pulses is determined as the second reference point, then the FMCW pulse index is 75.

[0242] c3) The index of the UWB pulse;

[0243] For example, the second signal includes 100 UWB pulses. If the 75th UWB pulse among these 100 UWB pulses is determined as the second reference point, then the UWB pulse index is 75.

[0244] As an alternative embodiment, the first rule includes at least one of the following:

[0245] (A) If there is a time-domain overlap between the first time range of the second signal transmitted by the first device and the second time range of the first signal, then the first reference point is a time point within the time range of the time-domain overlap.

[0246] (B) If there is no time-domain overlap between the first time range of the second signal transmitted by the first device and the second time range of the first signal, then the first reference point is a time point within the first time range that has the smallest time interval from the second time range.

[0247] In this embodiment, the first reference point should satisfy the above first rule. When there is a time-domain overlap between the time ranges of the second signal and the first signal, the first reference point should be a time point within the time range of the second signal that overlaps with the time range of the first signal. In the case where there is no time-domain overlap between the time ranges of the second signal and the first signal, the first reference point should be a time point within the time range of the second signal that has the smallest time interval from the time range of the first signal. The case where there is a time-domain overlap between the time ranges of the second signal and the first signal is as Figure 4 shown. The case where there is no time-domain overlap between the time ranges of the second signal and the first signal is as Figure 5 and Figure 6 shown.

[0248] Optionally, in the case where there is a time-domain overlap between the first time range and the second time range, the first rule further includes at least one of the following:

[0249] a1) If there is at least one identical time point between the time points occupied by the second signal and the time points occupied by the first signal, then the first reference point belongs to the at least one identical time point.

[0250] a2) If the time points occupied by the second signal and the time points occupied by the first signal do not have the same time points, then the first reference point is: among the time pairs with the smallest time interval in the time range of time domain overlap, the time point belonging to the second signal, where the time pairs are formed by each time point included in the second signal and each time point included in the first signal;

[0251] a3) The first reference point is the first target time point in the time range of time domain overlap, and the first target time point is a pre-configured or pre-defined time point.

[0252] Optionally, in the case where there is no time domain overlap between the first time range and the second time range, the first rule further includes at least one of the following:

[0253] b1) If the transmission time of the second signal is before the transmission time of the first signal, then the first reference point is the last time point in the first time range;

[0254] b2) If the transmission time of the second signal is after the transmission time of the first signal, then the first reference point is the first time point in the first time range.

[0255] Optionally, the second rule includes at least one of the following:

[0256] (1) If there is a time domain overlap between the second time range of the first signal sent by the second device and the first time range of the second signal, then the second reference point is a time point in the time range of time domain overlap;

[0257] (2) If there is no time domain overlap between the second time range of the first signal sent by the second device and the first time range of the second signal, then the second reference point is a time point with the smallest time interval from the first time range within the second time range.

[0258] Optionally, in the case where there is a time domain overlap between the second time range and the first time range, the second rule further includes at least one of the following:

[0259] 11) If the time points occupied by the first signal and the time points occupied by the second signal have at least one same time point, then the second reference point belongs to the at least one same time point;

[0260] 12) If the time points occupied by the first signal and the time points occupied by the second signal do not have the same time points, then the second reference point is: among the time pairs with the smallest time interval in the time range of time domain overlap, the time point belonging to the first signal, and the time pair is composed of each time point included in the second signal and each time point included in the first signal;

[0261] 13) The second reference point is the third target time point in the time range of time domain overlap, and the third target time point is a pre-configured or pre-defined time point.

[0262] Optionally, in the case where there is no time domain overlap between the second time range and the first time range, the second rule further includes at least one of the following:

[0263] 21) If the transmission time of the first signal is before the transmission time of the second signal, then the second reference point is the last time point in the second time range;

[0264] 22) If the transmission time of the first signal is after the transmission time of the second signal, then the second reference point is the first time point in the second time range.

[0265] In this embodiment, when the third device determines the first reference point and / or the second reference point, there are two cases: First, there is a time domain overlap between the first time range of the second signal and the second time range of the first signal; Second, there is no time domain overlap between the first time range of the second signal and the second time range of the first signal. The following will describe the two cases separately.

[0266] Case 1: For the case where there is a time domain overlap between the first time range and the second time range, as Figure 4 shown: The first reference point should be a time point in the time range of the second signal that overlaps with the time range of the first signal. The second reference point should be a time point in the time range of the first signal that overlaps with the time range of the second signal.

[0267] Specifically, if there is at least one time point that is exactly the same between the time points occupied by the second signal and the time points occupied by the first signal, then any one of the at least one exactly the same time point is determined as the first reference point and the second reference point. At this time, the time points indicated by the first reference point and the second reference point are the same time point, and the first device and the second device can ensure no error in time delay spectrum alignment based on this reference point.

[0268] If the time point occupied by the second signal is not exactly the same as the time point occupied by the first signal, the first reference point and the second reference point may be determined according to the following process:

[0269] 11): Assume that in the time range of the second signal, in the part that overlaps with the time range of the first signal, there are M time points occupied by the second signal, recorded as

[0270] 12): Assume that within the time range of the first signal, in the part that overlaps with the time range of the second signal, there are N time points occupied by the first signal, which are respectively denoted as

[0271] 13): Then you should Select T i (1) ,from Select T j (2) , so that |T i (1) -T j (2) |Take the minimum value. If the condition is met, i (1) and T j (2) If there are multiple, you can select any one T from them i (1) and T j (2) Among them, the selected T i (1) As the first reference point, select T j (2) At this time, the time interval between the time points indicated by the first reference point and the second reference point is the smallest, and the first device performs delay profile alignment based on the first reference point, and the second device performs delay profile alignment based on the second reference point, which can ensure that the error caused by the sampling clock drift to the round-trip measurement result is minimized.

[0272] Case 2: There is no time domain overlap between the first time range and the second time range, such as Figure 5 and Figure 6 As shown:

[0273] The first reference point should be a time point within the time range of the second signal that has the shortest time interval with the time range of the first signal;

[0274] If the second signal is before the first signal, the first reference point is the last time point among the time points occupied by the second signal, such as Figure 5As shown; if the second signal is after the first signal, the first reference point is the first time point among the time points occupied by the second signal, as Figure 6 shown.

[0275] The second reference point should be the time point with the smallest time interval from the time range of the second signal within the time range of the first signal;

[0276] Among them, if the second signal is before the first signal, the second reference point is the first time point among the time points occupied by the first signal, as Figure 5 shown.

[0277] If the second signal is after the first signal, the second reference point is the last time point among the time points occupied by the first signal, as Figure 6 shown.

[0278] In this case, the time interval between the time points indicated by the first reference point and the second reference point is the smallest. The first device performs time-delay spectrum alignment based on the first reference point, and the second device performs time-delay spectrum alignment based on the second reference point, which can minimize the error brought by the sampling clock drift to the result of the round-trip measurement.

[0279] As an optional embodiment, the method further includes:

[0280] Sending signal configuration information to the first device and / or the second device, where the signal configuration information includes at least one of the configuration information of the second signal and the configuration information of the first signal.

[0281] In this embodiment, the third device may send signal configuration information to the first device and / or the second device, including at least one of the configuration information of the second signal and the configuration information of the first signal. For the first device, the configuration information of the second signal is used to instruct the first device to send the second signal, and the configuration information of the first signal is used to instruct the first device to receive the first signal. Therefore, the first device can only obtain the part of the configuration information of the second signal related to sending the second signal and the part of the configuration information of the first signal related to receiving the first signal to save signaling overhead. For example: The first device does not need to obtain: the part of the antenna configuration related to receiving the second signal in the second signal configuration, and the part of the transmit power of the first signal in the first signal configuration.

[0282] For the second device, the configuration information of the second signal is used to instruct the second device to receive the second signal, and the configuration information of the first signal is used to instruct the second device to transmit the first signal. Therefore, the second device can only obtain the part of the second signal configuration related to receiving the second signal and the part of the first signal configuration related to transmitting the first signal, so as to save signaling overhead. For example: The second device does not need to obtain: the part of the second signal configuration related to the transmit power of the second signal, and the part of the first signal configuration related to the antenna configuration for receiving the first signal.

[0283] Optionally, the signal configuration information may include at least one of the following information:

[0284] 1) Waveform type; such as OFDM, Single-carrier Frequency-Division Multiple Access (SC-FDMA), Orthogonal Time Frequency Space (OTFS), Frequency Modulated Continuous Wave (FMCW), pulse signal, etc.

[0285] 2) Subcarrier spacing; for example: the subcarrier spacing of an OFDM system is 30 KHz.

[0286] 3) Guard interval; that is, the time interval between the end of the signal transmission time and the time when the latest echo signal of the signal is received. This parameter is proportional to the maximum sensing distance; for example: it can be calculated by 2d max / c, where d max is the maximum sensing distance (belonging to the sensing requirement). For example, for a self-transmitting and self-receiving sensing signal; d max represents the maximum distance from the sensing signal receiving point to the signal transmitting point; c is the speed of light; in some cases, the Cyclic Prefix (CP) of an OFDM signal can act as the minimum guard interval.

[0287] 4) Bandwidth; this parameter is inversely proportional to the range resolution and can be calculated by c / (2Δd), where Δd is the range resolution (belonging to the sensing requirement); c is the speed of light.

[0288] 5) Burst duration: This parameter is inversely proportional to the rate resolution (belonging to the sensing requirement). This parameter is the time span of the sensing signal, mainly for calculating the Doppler frequency shift; this parameter can be calculated by c / (2f c Δv); where, Δv is the velocity resolution; f c is the carrier frequency of the sensing signal; c is the speed of light.

[0289] 6) Time domain interval; this parameter can be calculated by c / (2fc v range ) is calculated; where, v range is the maximum rate minus the minimum speed (belonging to the sensing requirement); f c is the carrier frequency of the sensing signal; c is the speed of light. The time interval is the time interval between two adjacent sensing signals.

[0290] 7) Transmission signal power, for example, from -20 dBm to 23 dBm, taking a value every 2 dBm.

[0291] 8) Signal format, for example: Sounding Reference Signal (SRS), Demodulation Reference Signal (DMRS), Positioning Reference Signal (PRS), etc., or other predefined signals and related sequence format information.

[0292] 9) Signal direction; for example, the direction of the sensing signal or beam information.

[0293] 10) Time resource, for example, the time slot index or symbol index of the time slot where the sensing signal is located; where, the time resource is divided into two types. One is a one-time time resource, for example, sending an omnidirectional sensing signal in one symbol. The other is a non-one-time time resource, for example, multiple groups of periodic time resources or discontinuous time resources (which may include start time and end time). Each group of periodic time resources sends sensing signals in the same direction, and the beam directions on different groups of periodic time resources are different.

[0294] 11) Frequency resource; including the center frequency point, bandwidth, Radio Bearer (RB) or subcarrier, Point A, starting bandwidth position, etc., of the sensing signal.

[0295] 12) Quasi co-location (QCL) relationship; for example, the sensing signal includes multiple resources, and each resource corresponds to a Synchronization Signal Block (SSB) QCL. The QCL includes Type A, Type B, Type C or Type D.

[0296] 13) Antenna configuration information of the sensing node (base station or UE). Specifically, it includes at least one of the following:

[0297] a1) The antenna element identifier (ID) or antenna port ID for transmitting and / or receiving sensing signals;

[0298] a2) Panel ID + element ID for transmitting and / or receiving sensing signals;

[0299] a3) Position information of the antenna elements for transmitting and / or receiving sensing signals relative to a local reference point on the antenna array (which can be represented by Cartesian coordinates (x, y, z) or spherical coordinates );

[0300] a4) Position information of the panel for transmitting and / or receiving sensing signals relative to a local reference point on the antenna array and position information of the antenna elements for transmitting sensing signals within these selected panels relative to a unified reference point of the panel (such as the center point of the panel). Wherein, the position information can be represented by Cartesian coordinates (x, y, z) or spherical coordinates );

[0301] a5) Bitmap information of the antenna elements; for example: this bitmap uses "1" to indicate that the element is selected for transmitting and / or receiving sensing signals, and uses "0" to indicate that the element is not selected (it can also be represented conversely);

[0302] a6) Bitmap information of the array panel; for example: this bitmap uses "1" to indicate that the panel is selected for transmitting and / or receiving sensing signals, and uses "0" to indicate that the element is not selected (it can also be represented conversely). Optionally, the sensing node antenna configuration information may further include the bitmap information of the elements within these selected panels.

[0303] As an alternative embodiment, before sending the signal configuration information to the first device and / or the second device, the method further includes:

[0304] Obtaining the capability information of the first device and / or the second device;

[0305] Determining the signal configuration information according to the capability information;

[0306] Wherein, the capability information includes at least one of the following:

[0307] (1) Sensing-related capability information; such as the processing capability of sensing signals, the computing capability related to sensing, etc., which are not limited herein.

[0308] (2) Communication-related capability information; such as the processing capability of communication signals, the computing capability related to communication, antenna configuration and other information, which are not limited herein.

[0309] (3) Crystal oscillator and clock related information. The crystal oscillator refers to the crystal oscillator in the first device or the second device for generating the sampling clock signal.

[0310] Optionally, the crystal oscillator and clock related information includes at least one of the following:

[0311] 31) The type of the crystal oscillator; for example, classified by the resonance frequency accuracy: it can be divided into high-precision crystal oscillators, medium-precision crystal oscillators, and ordinary crystal oscillators;

[0312] 32) The frequency error of the crystal oscillator;

[0313] 33) The variation characteristics of the frequency error of the crystal oscillator with time; such as whether the frequency error of the crystal oscillator changes quickly or slowly with time.

[0314] 34) The error of the sampling clock;

[0315] 35) The variation characteristics of the sampling clock with time.

[0316] Optionally, the third device can determine the configuration information of the second signal and / or the configuration information of the first signal according to the crystal oscillator and clock related information of the first device and / or the second device. Specifically, the third device determines the part of the configuration information of the second signal related to time and / or determines the part of the configuration information of the first signal related to time according to the crystal oscillator and clock related information of the first device and / or the second device.

[0317] Optionally, the performance of the crystal oscillator or clock of the first device and the performance of the crystal oscillator or clock of the second device may be better or worse. Among them, the better performance of the crystal oscillator or clock means: one or more of the higher accuracy of the crystal oscillator, the smaller frequency error of the crystal oscillator, the slower change of the frequency error of the crystal oscillator with time, the smaller error of the sampling clock, and the slower change of the sampling clock with time. In the case of better performance of the crystal oscillator or clock, the time ranges of the second signal and the first signal may overlap or may not overlap in the time domain.

[0318] Among them, the worse performance of the crystal oscillator or clock means: one or more of the lower accuracy of the crystal oscillator, the larger frequency error of the crystal oscillator, the faster change of the frequency error of the crystal oscillator with time, the larger error of the sampling clock, and the faster change of the sampling clock with time. In the case of worse performance of the crystal oscillator or clock, the time ranges of the second signal and the first signal need to overlap in the time domain to ensure the minimization of the time interval between the two when determining the first reference point and the second reference point.

[0319] After the third device obtains the capability information of the first device and / or the second device, it determines the signal configuration information and sends the signal configuration information to the first device and / or the second device. After the first device obtains the signal configuration information, it has the time-related information of the second signal and the time-related information of the first signal. The time-related information includes: time range, each time point within the time range. Therefore, the first device can determine whether the time range of the second signal overlaps with that of the first signal and determine the first reference point based on the overlapping situation. After the second device obtains the signal configuration information, it has the time-related information of the second signal and the time-related information of the first signal. The time-related information includes: time range, each time point within the time range. Therefore, the second device can determine whether the time range of the second signal overlaps with that of the first signal and determine the second reference point based on the overlapping situation. In this case, the time interval between the time point corresponding to the first reference point and the time point corresponding to the second reference point is minimized.

[0320] As another optional embodiment, the third device may only send the signal configuration information to the first device and / or the second device, without sending the configuration information of the first reference point to the first device and / or the configuration information of the second reference point to the second device. So that the first device can send the second signal to the second device based on the configuration information of the second signal; and / or, receive the first signal sent by the second device according to the configuration information of the first signal, and the first device determines the first reference point by itself. And / or, enable the second device to send the first signal to the first device based on the configuration information of the first signal; and / or, receive the second signal sent by the first device according to the configuration information of the second signal, and the second device determines the second reference point by itself.

[0321] In the embodiment of the present application, in the process of suppressing the sampling timing deviation between devices based on the round-trip measurement method, the first device sends the second signal, the second device receives the second signal, the second device sends the first signal, and the first device receives the first signal; by jointly processing the delay information extracted from the signal processing of the second signal and the first signal, the signal propagation delay unaffected by the sampling timing deviation can be obtained. Due to the influence of the sampling clock drift, the sampling timing deviation changes with time, which causes the misalignment of the delay spectra measured at each time point. Before performing subsequent signal processing, it is necessary to align the delay spectra. The embodiment of the present application clarifies the reference point for aligning the delay spectra, minimizing the error brought by the sampling clock drift to the result of the round-trip measurement.

[0322] In an embodiment of the present application, a third device determines a first reference point for a first device, enabling the first device to perform time delay alignment processing on a first time delay spectrum based on the first reference point; and / or, the third device determines a second reference point for a second device, enabling the second device to perform time delay alignment processing on a second time delay spectrum based on the second reference point. The time point corresponding to the first reference point determined using this method is the same as or has the smallest time interval from the time point corresponding to the second reference point, minimizing the time delay spectrum error after the time delay spectrum alignment operation of the first device and the second device, thereby minimizing the error brought by the sampling clock drift to the result of the round-trip measurement.

[0323] For the signal processing method provided in the embodiments of the present application, the execution subject may be a signal processing device. In the embodiments of the present application, taking the signal processing device executing the signal processing method as an example, the signal processing device provided in the embodiments of the present application is described. For the time delay reference point indication method provided in the embodiments of the present application, the execution subject may be a time delay reference point indication device. In the embodiments of the present application, taking the time delay reference point indication device executing the time delay reference point indication method as an example, the time delay reference point indication device provided in the embodiments of the present application is described.

[0324] As Figure 9 shown, an embodiment of the present application provides a signal processing device 900, applied to a first device, including:

[0325] A first acquisition module 910, configured to acquire a first reference point, where the first reference point is used for time delay spectrum alignment processing;

[0326] A first processing module 920, configured to perform time delay alignment processing on a first time delay spectrum based on the first reference point;

[0327] Wherein, the first time delay spectrum is determined by the first device based on a received first signal, and the first signal is a signal sent by a second device.

[0328] Optionally, the first acquisition module is specifically configured to:

[0329] Receive configuration information of the first reference point sent by a third device, and determine the first reference point according to the configuration information;

[0330] Or,

[0331] Determine the first reference point according to a first rule.

[0332] Optionally, the first reference point satisfies a first rule; the first rule includes at least one of the following:

[0333] If there is a time domain overlap between the first time range of the second signal sent by the first device and the second time range of the first signal, then the first reference point is a time point in the time range of the time domain overlap;

[0334] If there is no time-domain overlap between the first time range of the second signal sent by the first device and the second time range of the first signal, the first reference point is a time point within the first time range that has the smallest time interval from the second time range.

[0335] Optionally, in the case where there is a time-domain overlap between the first time range and the second time range, the first rule further includes at least one of the following:

[0336] If there is at least one identical time point between the time points occupied by the second signal and the time points occupied by the first signal, the first reference point belongs to the at least one identical time point;

[0337] If there is no identical time point between the time points occupied by the second signal and the time points occupied by the first signal, the first reference point is: among the time points of the second signal in the time pairs with the smallest time intervals within the time range of the time-domain overlap, where the time pairs are formed by each time point included in the second signal and each time point included in the first signal;

[0338] The first reference point is the first target time point within the time range of the time-domain overlap, and the first target time point is a pre-configured or pre-defined time point.

[0339] Optionally, in the case where there is no time-domain overlap between the first time range and the second time range, the first rule further includes at least one of the following:

[0340] If the transmission time of the second signal is before the transmission time of the first signal, the first reference point is the last time point within the first time range;

[0341] If the transmission time of the second signal is after the transmission time of the first signal, the first reference point is the first time point within the first time range.

[0342] Optionally, the device further includes:

[0343] A first receiving module, configured to receive signal configuration information sent by a third device, where the signal configuration information includes at least one of: configuration information of the second signal and configuration information of the first signal;

[0344] A first transceiver module, configured to send the second signal to the second device according to the configuration information of the second signal; and / or, receive the first signal sent by the second device according to the configuration information of the first signal.

[0345] Optionally, the first processing module is specifically configured to:

[0346] In the first time delay spectrum, align the time delay spectra of all time points of the first signal with the time delay spectrum of the time point corresponding to the first reference point.

[0347] Optionally, the configuration information of the first reference point includes at least one of the following:

[0348] The offset of the first reference point relative to the start time of the first signal;

[0349] The offset of the first reference point relative to the second target time point;

[0350] The index of the time point of the first reference point in the first signal.

[0351] Optionally, the device further includes:

[0352] A second receiving module, configured to receive the first rule sent by a third device;

[0353] And / or

[0354] A second determining module, configured to determine the first rule according to protocol agreements.

[0355] In an embodiment of the present application, a first device obtains a first reference point, and performs time delay alignment processing on a first time delay spectrum based on the first reference point. The first time delay spectrum is determined by the first device based on a first signal sent by a second device received. By clarifying the reference point for time delay spectrum alignment, the error brought by the sampling clock drift to the result of round-trip measurement is minimized, and the accuracy of subsequent signal processing is improved.

[0356] The signal processing device in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal or other devices other than the terminal. Exemplarily, the terminal may include, but is not limited to, the types of the terminal 11 listed above, and other devices may be a server, a Network Attached Storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

[0357] The signal processing device provided in the embodiment of the present application can implement Figures 1 to 8 each process implemented by the method embodiment and achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0358] As Figure 10 shown, an embodiment of the present application provides a signal processing device 1000, applied to a second device, including:

[0359] A second acquisition module 1010, configured to acquire a second reference point for time delay spectrum alignment processing.

[0360] A second processing module 1020, configured to perform time delay alignment processing on a second time delay spectrum based on the second reference point.

[0361] Wherein, the second time delay spectrum is determined by a second device based on a received second signal, and the second signal is a signal sent by a first device.

[0362] Optionally, the second acquisition module is specifically configured to:

[0363] Receive configuration information of a second reference point sent by a third device, and determine the second reference point according to the configuration information.

[0364] Or,

[0365] Determine the second reference point according to a second rule.

[0366] Optionally, the second reference point satisfies a second rule; the second rule includes at least one of the following:

[0367] If there is a time domain overlap between a second time range of a first signal sent by the second device and a first time range of the second signal, the second reference point is a time point within the time range of the time domain overlap.

[0368] If there is no time domain overlap between a second time range of a first signal sent by the second device and a first time range of the second signal, the second reference point is a time point within the second time range that has the smallest time interval from the first time range.

[0369] Optionally, in the case where there is a time domain overlap between the second time range and the first time range, the second rule further includes at least one of the following:

[0370] If there is at least one identical time point between the time points occupied by the first signal and the time points occupied by the second signal, the second reference point belongs to the at least one identical time point.

[0371] If there is no identical time point between the time points occupied by the first signal and the time points occupied by the second signal, the second reference point is: among the time points within the time range of the time domain overlap, the time point belonging to the first signal in the time pair with the smallest time interval, where the time pair is formed by each time point included in the second signal and each time point included in the first signal.

[0372] The second reference point is a third target time point within the time range of the time domain overlap, and the third target time point is a pre-configured or predefined time point.

[0373] Optionally, in the case where there is no time domain overlap between the second time range and the first time range, the second rule further includes at least one of the following:

[0374] If the transmission time of the first signal is before the transmission time of the second signal, the second reference point is the last time point within the second time range;

[0375] If the transmission time of the first signal is after the transmission time of the second signal, the second reference point is the first time point within the second time range.

[0376] Optionally, the device further includes:

[0377] A third receiving module, configured to receive signal configuration information sent by a third device, where the signal configuration information includes at least one of: configuration information of the second signal and configuration information of the first signal;

[0378] A second transceiver module, configured to send a first signal to the first device according to the configuration information of the first signal; and / or, receive a second signal sent by the first device according to the configuration information of the second signal.

[0379] Optionally, the second processing module is specifically configured to:

[0380] In the second delay spectrum, align the delay spectra of all time points of the second signal with the delay spectrum of the time point corresponding to the second reference point.

[0381] Optionally, the configuration information of the second reference point includes at least one of the following:

[0382] The offset of the second reference point relative to the start time of the second signal;

[0383] The offset of the second reference point relative to the fourth target time point;

[0384] The index of the time point of the second reference point in the second signal.

[0385] Optionally, the device further includes:

[0386] A fourth receiving module, configured to receive the second rule sent by a third device;

[0387] And / or

[0388] A third determining module, configured to determine the second rule according to protocol agreements.

[0389] In an embodiment of the present application, a second device acquires a second reference point and performs time-delay alignment processing on a second time-delay spectrum based on the second reference point. The second time-delay spectrum is determined by the second device based on a second signal received from a first device. By clarifying the reference point for time-delay spectrum alignment, the error brought by the sampling clock drift to the result of the round-trip measurement can be minimized, and the accuracy of subsequent signal processing can be improved. Using this method can minimize the time interval between the time point corresponding to the second reference point and the time point corresponding to the first reference point determined by the first device, thereby minimizing the error brought by the sampling clock drift to the result of the round-trip measurement.

[0390] The signal processing device in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal or other devices other than terminals. Exemplarily, the terminal may include, but is not limited to, the types of the above-mentioned terminal 11, and other devices may be a server, a Network Attached Storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

[0391] The signal processing device provided by the embodiment of the present application can implement Figures 1 to 8 each process implemented by the method embodiment and achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0392] As Figure 11 shown, an embodiment of the present application provides a time-delay reference point indication device 1100, which is applied to a third device and includes:

[0393] A first determination module 1110, configured to determine a first reference point based on a first rule and / or determine a second reference point based on a second rule;

[0394] A first sending module 1120, configured to send configuration information of the first reference point to the first device and / or send configuration information of the second reference point to the second device;

[0395] Wherein, the first reference point is used for the first device to perform time-delay alignment processing on a first time-delay spectrum, the first time-delay spectrum is determined by the first device based on a first signal received, and the first signal is a signal sent by the second device;

[0396] The second reference point is used for the second device to perform time-delay alignment processing on a second time-delay spectrum, the second time-delay spectrum is determined by the second device based on a second signal received, and the second signal is a signal sent by the first device.

[0397] Optionally, the first rule includes at least one of the following:

[0398] If there is a time-domain overlap between the first time range of the second signal sent by the first device and the second time range of the first signal, the first reference point is a time point within the time range of the time-domain overlap;

[0399] If there is no time-domain overlap between the first time range of the second signal sent by the first device and the second time range of the first signal, the first reference point is a time point within the first time range that has the smallest time interval from the second time range.

[0400] Optionally, when there is a time-domain overlap between the first time range and the second time range, the first rule further includes at least one of the following:

[0401] If there is at least one identical time point between the time points occupied by the second signal and the time points occupied by the first signal, the first reference point belongs to the at least one identical time point;

[0402] If there is no identical time point between the time points occupied by the second signal and the time points occupied by the first signal, the first reference point is: among the time points within the time range of the time-domain overlap, the time point belonging to the second signal in the time pair with the smallest time interval, where the time pair is formed by each time point included in the second signal and each time point included in the first signal;

[0403] The first reference point is the first target time point within the time range of the time-domain overlap, and the first target time point is a pre-configured or pre-defined time point.

[0404] Optionally, when there is no time-domain overlap between the first time range and the second time range, the first rule further includes at least one of the following:

[0405] If the transmission time of the second signal is before the transmission time of the first signal, the first reference point is the last time point within the first time range;

[0406] If the transmission time of the second signal is after the transmission time of the first signal, the first reference point is the first time point within the first time range.

[0407] Optionally, the second rule includes at least one of the following:

[0408] If there is a time-domain overlap between the second time range of the first signal sent by the second device and the first time range of the second signal, the second reference point is a time point within the time range of the time-domain overlap;

[0409] If there is no time-domain overlap between the second time range of the first signal sent by the second device and the first time range of the second signal, the second reference point is a time point within the second time range that has the smallest time interval from the first time range.

[0410] Optionally, in the case where there is a time-domain overlap between the second time range and the first time range, the second rule further includes at least one of the following:

[0411] If there is at least one identical time point between the time points occupied by the first signal and the time points occupied by the second signal, the second reference point belongs to the at least one identical time point;

[0412] If there is no identical time point between the time points occupied by the first signal and the time points occupied by the second signal, the second reference point is: among the time points within the time range of the time-domain overlap, the time point belonging to the first signal in the time pair with the smallest time interval, where the time pair is formed by each time point included in the second signal and each time point included in the first signal;

[0413] The second reference point is the third target time point within the time range of the time-domain overlap, and the third target time point is a pre-configured or pre-defined time point.

[0414] Optionally, in the case where there is no time-domain overlap between the second time range and the first time range, the second rule further includes at least one of the following:

[0415] If the transmission time of the first signal is before the transmission time of the second signal, the second reference point is the last time point within the second time range;

[0416] If the transmission time of the first signal is after the transmission time of the second signal, the second reference point is the first time point within the second time range.

[0417] Optionally, the device further includes:

[0418] A second transmission module, configured to send signal configuration information to the first device and / or the second device, where the signal configuration information includes at least one of the configuration information of the second signal and the configuration information of the first signal.

[0419] Optionally, the device further includes:

[0420] A third acquisition module, configured to acquire the capability information of the first device and / or the second device;

[0421] A fourth determination module, configured to determine the signal configuration information according to the capability information;

[0422] Wherein, the capability information includes at least one of the following:

[0423] Capability information related to sensing;

[0424] Capability information related to communication;

[0425] Crystal oscillator and clock related information.

[0426] Optionally, the crystal oscillator and clock related information includes at least one of the following:

[0427] Type of crystal oscillator;

[0428] Frequency error of crystal oscillator;

[0429] Variation characteristics of the frequency error of the crystal oscillator over time;

[0430] Error of sampling clock;

[0431] Variation characteristics of the sampling clock over time.

[0432] Optionally, the apparatus further includes:

[0433] A fifth determination module, configured to determine the first rule and / or the second rule;

[0434] A third sending module, configured to send the first rule to the first device, and / or send the second rule to the second device.

[0435] In an embodiment of the present application, the third device determines a first reference point for the first device, so that the first device performs delay alignment processing on the first delay spectrum based on the first reference point; and / or, the third device determines a second reference point for the second device, so that the second device performs delay alignment processing on the second delay spectrum based on the second reference point. The time point corresponding to the first reference point determined by using this method is the same as or has the smallest time interval from the time point corresponding to the second reference point, and the delay spectrum error after the delay spectrum alignment operation of the first device and the second device is minimized, thereby minimizing the error brought by the sampling clock drift to the result of the round-trip measurement.

[0436] The delay reference point indicating apparatus in the embodiments of the present application may be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal or other devices other than a terminal. Exemplarily, the terminal may include, but is not limited to, the types of the terminal 11 listed above, and other devices may be a server, a Network Attached Storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0437] The time delay reference point indicating device provided by the embodiment of the present application can implement Figures 1 to 8 each process implemented by the method embodiment, and achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0438] As Figure 12 shown, the embodiment of the present application further provides a communication device 1200, including a processor 1201 and a memory 1202. A program or instruction that can run on the processor 1201 is stored on the memory 1202. For example, when the communication device 1200 is the first device, when the program or instruction is executed by the processor 1201, each step of the signal processing method embodiment applied to the first device is implemented, and the same technical effect can be achieved. When the communication device 1200 is the second device, when the program or instruction is executed by the processor 1201, each step of the signal processing method embodiment applied to the second device is implemented, and the same technical effect can be achieved. When the communication device 1200 is the third device, when the program or instruction is executed by the processor 1201, each step of the time delay reference point indicating method embodiment applied to the third device is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be elaborated here.

[0439] The embodiment of the present application further provides a communication device, including a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run a program or instruction to implement the steps in the method embodiment as Figure 2 shown. This communication device embodiment corresponds to the method embodiment applied to the first device. Each implementation process and implementation manner of the above method embodiment can be applied to this communication device embodiment, and the same technical effect can be achieved. Specifically, the communication device can be a terminal or a network-side device. Taking the communication device as a terminal as an example, Figure 13 is a schematic hardware structure diagram of a terminal for implementing the embodiment of the present application.

[0440] The terminal 1300 includes but is not limited to at least some components such as a radio frequency unit 1301, a network module 1302, an audio output unit 1303, an input unit 1304, a sensor 1305, a display unit 1306, a user input unit 1307, an interface unit 1308, a memory 1309, and a processor 1310.

[0441] Those skilled in the art can understand that the terminal 1300 may further include a power supply (such as a battery) for supplying power to each component. The power supply can be logically connected to the processor 1310 through a power management system, so as to implement functions such as management of charging, discharging, and power consumption management through the power management system. Figure 13The terminal structure shown does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0442] It should be understood that in the embodiments of the present application, the input unit 1304 may include a Graphics Processing Unit (GPU) 13041 and a microphone 13042. The graphics processor 13041 processes the image data of static pictures or videos obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 1306 may include a display panel 13061, and the display panel 13061 may be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 1307 includes at least one of a touch panel 13071 and other input devices 13072. The touch panel 13071 is also called a touch screen. The touch panel 13071 may include two parts: a touch detection device and a touch controller. The other input devices 13072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, which will not be elaborated here.

[0443] In the embodiments of the present application, after receiving downlink data from a network-side device, the radio frequency unit 1301 may transmit it to the processor 1310 for processing; in addition, the radio frequency unit 1301 may send uplink data to the network-side device. Generally, the radio frequency unit 1301 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0444] The memory 1309 can be used to store software programs or instructions and various data. The memory 1309 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data. Among them, the first storage area may store an operating system, application programs or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 1309 may include volatile memory or non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDR SDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM), and a direct rambus random access memory (DRRAM). The memory 1309 in the embodiments of the present application includes but is not limited to these and any other suitable types of memory.

[0445] The processor 1310 may include one or more processing units; optionally, the processor 1310 integrates an application processor and a modem processor. Among them, the application processor mainly processes operations related to the operating system, user interface, and application programs, etc., and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above modem processor may not be integrated into the processor 1310 either.

[0446] In this embodiment, the above device is taken as the first device, and the first device is a terminal for illustration.

[0447] Among them, the processor 1310 is used to obtain a first reference point, and the first reference point is used for time delay spectrum alignment processing; perform time delay alignment processing on the first time delay spectrum based on the first reference point; where the first time delay spectrum is determined by the first device based on the received first signal, and the first signal is a signal sent by the second device.

[0448] Optionally, the radio frequency unit 1301 is configured to receive configuration information of a first reference point sent by a third device, and determine the first reference point according to the configuration information;

[0449] Or,

[0450] The processor 1310 is configured to determine the first reference point according to a first rule.

[0451] Optionally, the first reference point satisfies a first rule; the first rule includes at least one of the following:

[0452] If there is a time domain overlap between a first time range of a second signal sent by the first device and a second time range of the first signal, the first reference point is a time point within the time range of the time domain overlap;

[0453] If there is no time domain overlap between a first time range of a second signal sent by the first device and a second time range of the first signal, the first reference point is a time point within the first time range that has the smallest time interval from the second time range.

[0454] Optionally, in the case where there is a time domain overlap between the first time range and the second time range, the first rule further includes at least one of the following:

[0455] If there is at least one same time point between the time points occupied by the second signal and the time points occupied by the first signal, the first reference point belongs to the at least one same time point;

[0456] If there is no same time point between the time points occupied by the second signal and the time points occupied by the first signal, the first reference point is: among the time points within the time range of the time domain overlap, the time point belonging to the second signal in the time pair with the smallest time interval, where the time pair is formed by each time point included in the second signal and each time point included in the first signal;

[0457] The first reference point is a first target time point within the time range of the time domain overlap, and the first target time point is a pre-configured or pre-defined time point.

[0458] Optionally, in the case where there is no time domain overlap between the first time range and the second time range, the first rule further includes at least one of the following:

[0459] If the transmission time of the second signal is before the transmission time of the first signal, the first reference point is the last time point within the first time range;

[0460] If the transmission time of the second signal is after the transmission time of the first signal, the first reference point is the first time point within the first time range.

[0461] Optionally, the radio frequency unit 1301 is further configured to:

[0462] Receive signal configuration information sent by a third device, where the signal configuration information includes at least one of configuration information of a second signal and configuration information of a first signal;

[0463] Send a second signal to the second device according to the configuration information of the second signal; and / or receive the first signal sent by the second device according to the configuration information of the first signal.

[0464] Optionally, the processor 1310 is specifically configured to:

[0465] In the first delay spectrum, align the delay spectra of all time points of the first signal with the delay spectrum of the time point corresponding to the first reference point.

[0466] Optionally, the configuration information of the first reference point includes at least one of the following:

[0467] The offset of the first reference point relative to the start time of the first signal;

[0468] The offset of the first reference point relative to a second target time point;

[0469] The index of the time point of the first reference point in the first signal.

[0470] Optionally, the radio frequency unit 1301 is further configured to:

[0471] Receive the first rule sent by a third device;

[0472] And / or

[0473] The processor 1310 is further configured to: determine the first rule according to protocol agreements.

[0474] In an embodiment of the present application, a device obtains a first reference point and performs delay alignment processing on a first delay spectrum based on the first reference point. The first delay spectrum is determined by a first device based on a first signal sent by a second device. By clarifying the reference point for delay spectrum alignment, the error brought by the sampling clock drift to the result of the round-trip measurement is minimized, and the accuracy of subsequent signal processing is improved.

[0475] It can be understood that the implementation processes of the implementation manners mentioned in this embodiment can refer to the related descriptions of the signal processing method in the method embodiment and achieve the same or corresponding technical effects. To avoid repetition, they are not described herein again.

[0476] It should be noted that the above device can also implement Figure 7 or Figure 8 the steps in the method shown, or can implement Figure 10 or Figure 11 the methods executed by the respective modules shown.

[0477] The embodiments of the present application further provide a communication device, including a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement as Figure 7 the steps of the method embodiment shown. This communication device embodiment corresponds to the method embodiment applied to the second device above. Each implementation process and implementation manner of the above method embodiment can be applied to this communication device embodiment, and the same technical effects can be achieved.

[0478] Specifically, the communication device can be a terminal or a network-side device, such as a base station. Taking the communication device as a network-side device as an example, the embodiments of the present application further provide a network-side device, as Figure 14 shown. The network-side device 1400 includes: an antenna 141, a radio frequency device 142, a baseband device 143, a processor 144, and a memory 145. The antenna 141 is connected to the radio frequency device 142. In the uplink direction, the radio frequency device 142 receives information through the antenna 141 and sends the received information to the baseband device 143 for processing. In the downlink direction, the baseband device 143 processes the information to be sent and sends it to the radio frequency device 142. After the radio frequency device 142 processes the received information, it is sent out through the antenna 141.

[0479] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 143, and the baseband device 143 includes a baseband processor.

[0480] The baseband device 143 can, for example, include at least one baseband board, and a plurality of chips are provided on the baseband board, as Figure 14 shown. One of the chips is, for example, a baseband processor, which is connected to the memory 145 through a bus interface to call the program in the memory 145 to execute the network device operations shown in the above method embodiments.

[0481] The network-side device may further include a network interface 146, and this interface is, for example, a Common Public Radio Interface (CPRI).

[0482] Specifically, the network-side device 1400 in the embodiments of the present application further includes: instructions or programs stored in the memory 145 and executable on the processor 144. The processor 144 calls the instructions or programs in the memory 145 to execute Figure 10 the methods executed by the modules shown, and achieves the same technical effects. To avoid repetition, it will not be elaborated here.

[0483] It should be noted that the above device can also implement Figure 2 or Figure 8 the steps in the method shown, or can implement Figure 9 or Figure 11 the methods executed by the modules shown.

[0484] Specifically, the embodiments of the present application further provide a communication device. The communication device is a third device, and the communication device can be a terminal or a network-side device. The network-side device is, for example, a base station or a core network. Taking the network-side device as a core network device as an example, as Figure 15 shown, the network-side device 1500 includes: a processor 1501, a network interface 1502, and a memory 1503. Among them, the network interface 1502 is, for example, a common public radio interface (CPRI).

[0485] Specifically, the network-side device 1500 in the embodiments of the present application further includes: instructions or programs stored in the memory 1503 and executable on the processor 1501. The processor 1501 calls the instructions or programs in the memory 1503 to execute Figure 10 the methods executed by the modules shown, and achieves the same technical effects. To avoid repetition, it will not be elaborated here.

[0486] The embodiments of the present application further provide a readable storage medium. Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, the various processes of the signal processing method embodiments are implemented, or the various processes of the delay reference point indication method embodiments are implemented, and the same technical effects can be achieved. To avoid repetition, it will not be elaborated here.

[0487] Among them, the processor is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disks, or optical discs. In some examples, the readable storage medium can be a non-transitory readable storage medium.

[0488] Another embodiment of the present application provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is configured to run programs or instructions to implement the various processes of the signal processing method embodiment described above, or to implement the various processes of the delay reference point indication method embodiment described above, and can achieve the same technical effects. To avoid repetition, details are not described herein again.

[0489] It should be understood that the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, system chip, chip system, or system-on-chip.

[0490] Another embodiment of the present application provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement the various processes of the signal processing method embodiment described above, or to implement the various processes of the delay reference point indication method embodiment described above, and can achieve the same technical effects. To avoid repetition, details are not described herein again.

[0491] The embodiments of the present application further provide a communication system, including: a first device, a second device, and a third device. The first device can be used to execute the steps of the signal processing method applied to the first device as described above. The second device can be used to execute the steps of the signal processing method applied to the second device as described above. The third device can be used to execute the steps of the delay reference point indication method as described above.

[0492] It should be noted that in this document, the terms "including", "comprising", or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device including a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. Without further limitation, an element defined by the phrase "including a..." does not exclude the existence of additional identical elements in the process, method, article, or device including that element. In addition, it should be pointed out that the methods and devices in the embodiments of the present application are not limited to performing functions in the order shown or discussed. They may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0493] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-described example methods can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, they can also be implemented by hardware. This computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes several instructions for causing a terminal or a network-side device to execute the methods described in various embodiments of the present application.

[0494] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms of embodiments without departing from the purpose of the present application and the scope protected by the claims. These embodiments are all within the protection scope of the present application.

Claims

1. A signal processing method, characterized in that, Including: The first device obtains a first reference point for time delay spectrum alignment processing. The first device performs time delay alignment processing on the first time delay spectrum based on the first reference point. Wherein, the first time delay spectrum is determined by the first device based on the received first signal, and the first signal is a signal sent by the second device.

2. The method according to claim 1, wherein The obtaining of the first reference point includes: Receiving configuration information of the first reference point sent by the third device, and determining the first reference point according to the configuration information; Or, Determining the first reference point according to a first rule.

3. The method according to claim 1 or 2, characterized in that, The first reference point satisfies the first rule; the first rule includes at least one of the following: If there is a time domain overlap between the first time range of the second signal sent by the first device and the second time range of the first signal, then the first reference point is a time point in the time range of the time domain overlap; If there is no time domain overlap between the first time range of the second signal sent by the first device and the second time range of the first signal, then the first reference point is a time point in the first time range with the smallest time interval from the second time range.

4. The method according to claim 3, wherein In the case where there is a time domain overlap between the first time range and the second time range, the first rule further includes at least one of the following: If there is at least one same time point between the time points occupied by the second signal and the time points occupied by the first signal, then the first reference point belongs to the at least one same time point; If there is no same time point between the time points occupied by the second signal and the time points occupied by the first signal, then the first reference point is: in the time range of the time domain overlap, the time point belonging to the second signal in the time pair with the smallest time interval, and the time pair is formed by each time point included in the second signal and each time point included in the first signal; The first reference point is the first target time point in the time range of the time domain overlap, and the first target time point is a pre-configured or pre-defined time point.

5. The method according to claim 3, characterized in that, In the case where there is no time domain overlap between the first time range and the second time range, the first rule further includes at least one of the following: If the transmission time of the second signal is before the transmission time of the first signal, then the first reference point is the last time point in the first time range; If the transmission time of the second signal is after the transmission time of the first signal, then the first reference point is the first time point in the first time range.

6. The method according to any one of claims 1 to 5, characterized in that, The performing of time delay alignment processing on the first time delay spectrum based on the first reference point includes: In the first time delay spectrum, aligning the time delay spectra of all time points of the first signal with the time delay spectrum of the time point corresponding to the first reference point.

7. The method according to any one of claims 1 to 6, characterized in that, The method further includes: Receiving signal configuration information sent by the third device, where the signal configuration information includes at least one of: configuration information of the second signal and configuration information of the first signal; Sending the second signal to the second device according to the configuration information of the second signal; and / or, receiving the first signal sent by the second device according to the configuration information of the first signal.

8. The method according to claim 2, wherein The configuration information of the first reference point includes at least one of the following: The offset of the first reference point relative to the start time of the first signal; The offset of the first reference point relative to the second target time point; The index of the time point of the first reference point in the first signal.

9. The method according to claim 2, characterized in that, The method further includes: Receiving the first rule sent by the third device; and / or Determining the first rule according to the protocol agreement.

10. A signal processing method, characterized in that, Includes: The second device obtains a second reference point, which is used for time delay spectrum alignment processing; The second device performs time delay alignment processing on the second time delay spectrum based on the second reference point; Wherein, the second time delay spectrum is determined by the second device based on the received second signal, and the second signal is the signal sent by the first device.

11. The method according to claim 10, wherein The obtaining of the second reference point includes: Receiving the configuration information of the second reference point sent by the third device, and determining the second reference point according to the configuration information; Or, Determining the second reference point according to the second rule.

12. The method according to claim 10 or 11, characterized in that, The second reference point satisfies the second rule; the second rule includes at least one of the following: If there is a time domain overlap between the second time range of the first signal sent by the second device and the first time range of the second signal, then the second reference point is a time point in the time range of the time domain overlap; If there is no time domain overlap between the second time range of the first signal sent by the second device and the first time range of the second signal, then the second reference point is a time point in the second time range with the smallest time interval from the first time range.

13. The method according to claim 12, wherein In the case where there is a time domain overlap between the second time range and the first time range, the second rule further includes at least one of the following: If there is at least one same time point between the time points occupied by the first signal and the time points occupied by the second signal, then the second reference point belongs to the at least one same time point; If there is no same time point between the time points occupied by the first signal and the time points occupied by the second signal, then the second reference point is: in the time range of the time domain overlap, the time point belonging to the first signal in the time pair with the smallest time interval, and the time pair is composed of each time point included in the second signal and each time point included in the first signal; The second reference point is the third target time point in the time range of the time domain overlap, and the third target time point is a pre-configured or pre-defined time point.

14. The method according to claim 12, wherein In the case where there is no time domain overlap between the second time range and the first time range, the second rule further includes at least one of the following: If the transmission time of the first signal is before the transmission time of the second signal, then the second reference point is the last time point in the second time range; If the transmission time of the first signal is after the transmission time of the second signal, then the second reference point is the first time point in the second time range.

15. The method according to any one of claims 10 to 14, characterized in that, The performing of the time delay alignment processing on the second time delay spectrum based on the second reference point includes: In the second time delay spectrum, aligning the time delay spectra of all time points of the second signal with the time delay spectrum of the time point corresponding to the second reference point.

16. The method according to any one of claims 10 to 15, characterized in that, The method further includes: Receiving signal configuration information sent by a third device, where the signal configuration information includes at least one of configuration information of a second signal and configuration information of a first signal; Sending a first signal to the first device according to the configuration information of the first signal; and / or receiving a second signal sent by the first device according to the configuration information of the second signal.

17. The method according to claim 11, wherein The configuration information of the second reference point includes at least one of the following: The offset of the second reference point relative to the start time of the second signal; The offset of the second reference point relative to a fourth target time point; The index of the time point of the second reference point in the second signal.

18. The method according to claim 11, wherein The method further includes: Receiving the second rule sent by a third device; and / or Determining the second rule according to protocol agreements.

19. A method for indicating a time delay reference point, characterized in that, It includes: The third device determines a first reference point based on a first rule and / or determines a second reference point based on a second rule; The third device sends the configuration information of the first reference point to the first device and / or sends the configuration information of the second reference point to the second device; Wherein, the first reference point is used for the first device to perform time delay alignment processing on a first time delay spectrum, the first time delay spectrum is determined by the first device based on the received first signal, and the first signal is a signal sent by the second device; The second reference point is used for the second device to perform time delay alignment processing on a second time delay spectrum, the second time delay spectrum is determined by the second device based on the received second signal, and the second signal is a signal sent by the first device.

20. The method according to claim 19, wherein The first rule includes at least one of the following: If there is a time domain overlap between the first time range of the second signal sent by the first device and the second time range of the first signal, then the first reference point is a time point in the time range of the time domain overlap; If there is no time domain overlap between the first time range of the second signal sent by the first device and the second time range of the first signal, then the first reference point is a time point with the smallest time interval from the second time range within the first time range.

21. The method according to claim 19, wherein The second rule includes at least one of the following: If there is a time domain overlap between the second time range of the first signal sent by the second device and the first time range of the second signal, then the second reference point is a time point in the time range of the time domain overlap; If there is no time domain overlap between the second time range of the first signal sent by the second device and the first time range of the second signal, then the second reference point is a time point with the smallest time interval from the first time range within the second time range.

22. The method according to claim 19, wherein The method further includes: Sending signal configuration information to the first device and / or the second device, where the signal configuration information includes at least one of configuration information of a second signal and configuration information of a first signal.

23. The method according to claim 22, wherein Before sending the signal configuration information to the first device and / or the second device, the method further includes: Obtaining the capability information of the first device and / or the second device; Determining the signal configuration information according to the capability information; Wherein, the capability information includes at least one of the following: Capability information related to sensing; Communication-related capability information; Crystal oscillator and clock-related information.

24. The method according to claim 23, wherein The crystal oscillator and clock-related information includes at least one of the following: The type of crystal oscillator; The frequency error of the crystal oscillator; The variation characteristic of the frequency error of the crystal oscillator over time; The error of the sampling clock; The variation characteristic of the sampling clock over time.

25. The method according to claim 19, characterized in that, The method further includes: Determining the first rule and / or the second rule; Sending the first rule to the first device, and / or, sending the second rule to the second device.

26. A signal processing device, characterized in that, Including: A first acquisition module, configured to acquire a first reference point for time delay spectrum alignment processing; A first processing module, configured to perform time delay alignment processing on a first time delay spectrum based on the first reference point; Wherein, the first time delay spectrum is determined by a first device based on a received first signal, and the first signal is a signal sent by a second device.

27. The device according to claim 26, characterized in that, The first acquisition module is specifically configured to: Receive configuration information of a first reference point sent by a third device, and determine the first reference point according to the configuration information; Or, Determine the first reference point according to the first rule.

28. The device according to claim 26 or 27, characterized in that, The first processing module is specifically configured to: In the first time delay spectrum, align the time delay spectra of all time points of the first signal with the time delay spectrum of the time point corresponding to the first reference point.

29. The device according to any one of claims 26 to 28, characterized in that, The apparatus further includes: A first receiving module, configured to receive signal configuration information sent by a third device, where the signal configuration information includes at least one of: configuration information of a second signal and configuration information of a first signal; A first transceiver module, configured to send a second signal to the second device according to the configuration information of the second signal; and / or, receive the first signal sent by the second device according to the configuration information of the first signal.

30. A signal processing device, characterized in that, Including: A second acquisition module, configured to acquire a second reference point for time delay spectrum alignment processing; A second processing module, configured to perform time delay alignment processing on a second time delay spectrum based on the second reference point; Wherein, the second time delay spectrum is determined by a second device based on a received second signal, and the second signal is a signal sent by a first device.

31. The device according to claim 30, characterized in that, The second acquisition module is specifically configured to: Receive configuration information of a second reference point sent by a third device, and determine the second reference point according to the configuration information; Or, Determine the second reference point according to the second rule.

32. The device according to claim 30 or 31, characterized in that, The second processing module is specifically configured to: In the second time delay spectrum, align the time delay spectra of all time points of the second signal with the time delay spectrum of the time point corresponding to the second reference point.

33. The device according to any one of claims 31 to 32, characterized in that, The apparatus further includes: A third receiving module, configured to receive signal configuration information sent by a third device, where the signal configuration information includes at least one of: configuration information of a second signal and configuration information of a first signal; A second transceiver module, configured to send a first signal to the first device according to the configuration information of the first signal; and / or, receive the second signal sent by the first device according to the configuration information of the second signal.

34. A time delay reference point indicating device, characterized in that, Including: A first determination module, configured to determine a first reference point based on a first rule and / or determine a second reference point based on a second rule; A first sending module, configured to send the configuration information of the first reference point to a first device, and / or send the configuration information of the second reference point to a second device; Wherein, the first reference point is used for the first device to perform time delay alignment processing on a first time delay spectrum, the first time delay spectrum is determined by the first device based on a received first signal, and the first signal is a signal sent by the second device; The second reference point is used for the second device to perform time delay alignment processing on a second time delay spectrum, the second time delay spectrum is determined by the second device based on a received second signal, and the second signal is a signal sent by the first device.

35. The device according to claim 34, characterized in that, The apparatus further comprises: A second sending module, configured to send signal configuration information to the first device and / or the second device, the signal configuration information including at least one of the configuration information of the second signal and the configuration information of the first signal.

36. The device according to claim 34, wherein The apparatus further comprises: A third obtaining module, configured to obtain the capability information of the first device and / or the second device; A fourth determining module, configured to determine the signal configuration information according to the capability information; Wherein, the capability information includes at least one of the following: Capability information related to sensing; Capability information related to communication; Oscillator and clock related information.

37. A communication device, characterized in that, Comprising a processor and a memory, the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, it implements the steps of the signal processing method according to any one of claims 1 to 9, or implements the steps of the signal processing method according to any one of claims 10 to 18, or implements the steps of the time delay reference point indication method according to any one of claims 19 to 25.

38. A readable storage medium, characterized in that, The program or instruction is stored on the readable storage medium, and when the program or instruction is executed by the processor, it implements the signal processing method according to any one of claims 1-9, or implements the steps of the signal processing method according to any one of claims 10 to 18, or implements the steps of the time delay reference point indication method according to any one of claims 19 to 25.

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