Signal processing method and device, communication equipment and storage medium

Abstract

The invention discloses a signal processing method and device, communication equipment and a storage medium, and belongs to the technical field of communication, and the signal processing method comprises the steps that first communication equipment obtains perception demand information and first information, the perception demand information is used for indicating perception information needed by a perception service initiator, and the first information is used for indicating the perception information needed by the perception service initiator; the first information is used for indicating transmission resource information and modulation information of the second communication equipment; the first communication device receives a second signal generated based on the first information and the first signal from the second communication device based on the perception demand information and the first information; wherein the modulation information comprises at least one of the following items: a modulation mode; a modulated spreading factor; modulating the rate; and backscattering the link frequency.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to a signal processing method, apparatus, communication equipment and storage medium. Background Art

[0002] Backscatter Communication (BSC) refers to the use of radio frequency signals from other devices or environments to modulate signals to transmit information. Backscatter communication equipment has the characteristics of low cost, low power consumption, and small size. It can be widely used in warehousing and logistics, industrial manufacturing, smart cities, smart homes and other scenarios, such as inventory and tracking of goods, finding personal belongings, locating vehicles in parking lots, locating shops in shopping malls, and locating booths in museums.

[0003] Installing the backscatter communication device on the sensing target or placing it next to the sensing target can assist the receiving device of the backscatter communication system to sense the sensing target. However, there is currently no clear solution on how to enhance the sensing performance of the sensing target when the backscatter communication device participates in the sensing. Summary of the invention

[0004] The embodiments of the present application provide a signal processing method, apparatus, communication equipment and storage medium, which can enhance the perception performance of a perception target.

[0005] In a first aspect, a signal processing method is provided, comprising:

[0006] The first communication device obtains perception requirement information and first information, where the perception requirement information is used to indicate the perception information required by the perception service initiator, and the first information is used to indicate the transmission resource information and modulation information of the second communication device;

[0007] The first communication device receives, based on the perception demand information and the first information, a second signal generated based on the first information and the first signal from the second communication device;

[0008] The modulation information includes at least one of the following:

[0009] Modulation method;

[0010] Spreading factor of the modulation;

[0011] Modulation rate;

[0012] Backscatter link frequency.

[0013] In a second aspect, a signal processing method is provided, comprising:

[0014] The second communication device receives first information and a first signal, where the first information is used to indicate transmission resource information and modulation information of the second communication device;

[0015] The second communication device generates a second signal based on the first information and the first signal;

[0016] The second communication device sends the second signal to the first communication device;

[0017] The modulation information includes at least one of the following:

[0018] Modulation method;

[0019] Spreading factor of the modulation;

[0020] Modulation rate;

[0021] Backscatter link frequency.

[0022] In a third aspect, a signal processing method is provided, comprising:

[0023] The third communication device obtains the perception requirement information, where the perception requirement information is used to indicate the perception information required by the initiator of the perception service;

[0024] The third communication device sends first information to the first communication device and the second communication device, where the first information is used to indicate transmission resource information and modulation information of the second communication device;

[0025] The third communication device sends a first signal to the second communication device;

[0026] The modulation information includes at least one of the following:

[0027] Modulation method;

[0028] Spreading factor of the modulation;

[0029] Modulation rate;

[0030] Backscatter link frequency.

[0031] In a fourth aspect, a signal processing device is provided, comprising:

[0032] A first obtaining module, configured to obtain perception requirement information and first information, wherein the perception requirement information is used to indicate the perception information required by the perception service initiator, and the first information is used to indicate the transmission resource information and modulation information of the second communication device;

[0033] A first receiving module, configured to receive, from the second communication device, a second signal generated based on the first information and the first signal, based on the perception demand information and the first information;

[0034] The modulation information includes at least one of the following:

[0035] Modulation method;

[0036] Spreading factor of the modulation;

[0037] Modulation rate;

[0038] Backscatter link frequency.

[0039] In a fifth aspect, a signal processing device is provided, comprising:

[0040] A third receiving module, configured to receive first information and a first signal, wherein the first information is used to indicate transmission resource information and modulation information of the second communication device;

[0041] A generating module, configured to generate a second signal based on the first information and the first signal;

[0042] A second sending module, configured to send the second signal to the first communication device;

[0043] The modulation information includes at least one of the following:

[0044] Modulation method;

[0045] Spreading factor of the modulation;

[0046] Modulation rate;

[0047] Backscatter link frequency.

[0048] In a sixth aspect, a signal processing device is provided, including:

[0049] A second obtaining module is used to obtain perception requirement information, where the perception requirement information is used to indicate the perception information required by the initiator of the perception service;

[0050] A third sending module, used to send first information to the first communication device and the second communication device, where the first information is used to indicate transmission resource information and modulation information of the second communication device;

[0051] A fourth sending module, configured to send a first signal to the second communication device;

[0052] The modulation information includes at least one of the following:

[0053] Modulation method;

[0054] Spreading factor of the modulation;

[0055] Modulation rate;

[0056] Backscatter link frequency.

[0057] In the seventh aspect, a communication device is provided, which terminal includes a processor and a memory, the memory storing a program or instruction that can be executed on the processor, and the program or instruction, when executed by the processor, implements the steps of the method described in the first aspect, or implements the steps of the method described in the second aspect, or implements the steps of the method described in the third aspect.

[0058] In an eighth aspect, a communication device is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instructions to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect, or to implement the steps of the method described in the third aspect.

[0059] In the ninth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented, or the steps of the method described in the third aspect are implemented.

[0060] In the tenth aspect, a wireless communication system is provided, comprising: a first communication device and a second communication device, wherein the first communication device can be used to execute the steps of the method described in the first aspect, and the second communication device can be used to execute the steps of the method described in the second aspect.

[0061] In the eleventh aspect, a wireless communication system is provided, comprising: a first communication device, a second communication device and a third communication device, wherein the first communication device can be used to execute the steps of the method described in the first aspect, the second communication device can be used to execute the steps of the method described in the second aspect, and the third communication device can be used to execute the steps of the method described in the third aspect.

[0062] In the twelfth aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instructions to implement 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.

[0063] In the thirteenth aspect, a computer program / program product is provided, wherein the computer program / program product is stored in a storage medium, and the program / program product is executed by at least one processor to implement 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.

[0064] In an embodiment of the present application, after the first communication device obtains the perception demand information and the first information, based on the perception demand information and the first information, it receives a second signal generated based on the first information and the first signal from the second communication device, the perception demand information is used to indicate the perception information required by the initiator of the perception service, the first information is used to indicate the transmission resource information and modulation information of the second communication device, the modulation information includes at least one of the modulation mode, the spreading factor of the modulation, the modulation rate and the backscatter link frequency, the second signal is generated based on the first information and the first signal, the first communication device receives the second signal based on the perception demand information and the first information, and the perception performance of the perception target can be enhanced through the second signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 A block diagram of a wireless communication system applicable to the embodiments of the present application;

[0066] Figure 2 It is a structural schematic diagram of a backscatter communication device in the related art;

[0067] Figure 3 It is a structural schematic diagram of a reading and writing device in the related art;

[0068] Figure 4 A schematic diagram of a backscatter communication modulation principle in the related art;

[0069] Figure 5 A schematic diagram of the relationship between a read / write device and a backscatter communication device in the related art;

[0070] Figure 6 It is a first topological structure diagram of a backscatter communication system in the related art;

[0071] Figure 7 A second topological structure diagram of a backscatter communication system in the related art;

[0072] Figure 8 A third topological structure diagram of a backscatter communication system in the related art;

[0073] Fig. 9 It is a fourth topological structure diagram of the backscatter communication system in the related art;

[0074] Fig.10 A fifth topological structure diagram of a backscatter communication system in the related art;

[0075] Fig.11 It is a schematic diagram of the first synaesthesia architecture in the related art;

[0076] Fig.12 is a schematic diagram of a second synaesthesia architecture in the related art;

[0077] Fig.13 is a schematic diagram of a third synaesthesia architecture in the related art;

[0078] Fig.14 is a schematic diagram of a fourth synaesthesia architecture in the related art;

[0079] Fig.15 This is a flow chart of an implementation of a signal processing method in an embodiment of the present application;

[0080] Fig.16 A schematic diagram of time domain resources configured in an embodiment of the present application;

[0081] Fig.17 This is a schematic diagram of the first transmission process in an embodiment of the present application;

[0082] Fig.18 This is a schematic diagram of the second transmission process in an embodiment of the present application;

[0083] Fig.19 This is a schematic diagram of the third transmission process in the embodiment of the present application;

[0084] Fig. 20 This is a schematic diagram of the fourth transmission process in an embodiment of the present application;

[0085] Fig.21 This is a schematic diagram of the fifth transmission process in the embodiment of the present application;

[0086] Fig. 22 is a flowchart of another signal processing method in an embodiment of the present application;

[0087] Fig.23 This is a flowchart of another signal processing method in an embodiment of the present application;

[0088] Fig.24 In the embodiments of this application Fig.15 A schematic structural diagram of a corresponding signal processing device;

[0089] Fig.25 In the embodiments of this application Fig. 22 A schematic structural diagram of a corresponding signal processing device;

[0090] Fig.26 In the embodiments of this application Fig.23 A schematic structural diagram of a corresponding signal processing device;

[0091] Fig. 27 This is a schematic diagram of the structure of a communication device in an embodiment of the present application;

[0092] Fig.28 This is a schematic diagram of the structure of a terminal in an embodiment of the present application;

[0093] Fig.29 This is a schematic diagram of the structure of a network side device in an embodiment of the present application. DETAILED DESCRIPTION

[0094] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0095] The terms "first", "second", etc. of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of one type, and the number of objects is not limited, for example, the first object can be one or more. In addition, "or" in the present application represents at least one of the connected objects. For example, "A or B" covers three schemes, namely, Scheme 1: including A but not including B; Scheme 2: including B but not including A; Scheme 3: including both A and B. The character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0096] The term "indication" in this application can be a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, operations to be performed, or request results in the sent indication; an indirect indication can be understood as the receiver determining the corresponding information according to the indication sent by the sender, or making a judgment and determining the operation to be performed or the request result according to the judgment result.

[0097] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the systems and radio technologies mentioned above as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following descriptions, but these technologies can also be applied to systems other than NR systems, such as the 6th generation (6 th Generation, 6G) communication system.

[0098] Figure 1A block diagram of a wireless communication system applicable to an embodiment of the present application is shown. The wireless communication system includes a terminal 11 and a network side device 12. Among them, the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (Ultra-mobile Personal Computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), an augmented reality (Augmented Reality, AR), a virtual reality (Virtual Reality, VR) device, a robot, a wearable device (Wearable Device), an aircraft (flight vehicle), a vehicle-mounted device (Vehicle User Equipment, VUE), a ship-mounted device, a pedestrian terminal (Pedestrian User Equipment, PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, televisions, washing machines or furniture, etc.), a game console, a personal computer (Personal Computer, PC), a teller machine or a self-service machine and other terminal side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be referred to as a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (Wireless Local Area Network, WLAN) access point (Access Point, AS) or a wireless fidelity (Wireless Fidelity, WiFi) node, etc.Among them, the base station may be referred to as a Node B (NB), an evolved Node B (eNB), a next generation Node B (gNB), a New Radio Node B (NR Node B), an access point, a Relay Base Station (RBS), a Serving Base Station (SBS), a Base Transceiver Station (BTS), a radio base station, a radio transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a Home Node B (HNB), a Home Evolved Node B (home evolved Node B), a Transmission Reception Point (TRP) or other appropriate terms in the relevant field. As long as the same technical effect is achieved, the base station is not limited to specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0099] To facilitate understanding, the application scenarios of the embodiments of the present application, as well as the related technologies and concepts involved, are first introduced.

[0100] 1. Application scenarios of embodiments of the present application

[0101] The technical solution provided in the embodiments of the present application can be applied to backscatter communication scenarios. For example, it can be applied to scenarios such as item inventory, logistics inventory, fire warning, positioning, speed measurement, etc. For example, it can be applied to a dedicated reader for wireless radio frequency identification (RFID) technology, WiFi transmission scenarios, cellular network transmission scenarios, or next-generation mobile communication scenarios.

[0102] 2. Extremely low power communication

[0103] Backscatter communication is a typical application of ultra-low power communication. Backscatter communication refers to the backscatter communication device using the radio frequency signal from other devices or the environment to modulate the signal to transmit its own information.

[0104] Types of backscatter communication equipment can include the following:

[0105] One is a passive device, such as the backscatter communication device in the traditional RFID, which belongs to the passive Internet of Things (IoT) device, generally a tag device. This type of backscatter communication device does not have energy storage capacitors or energy storage batteries, and relies on radio frequency (RF) signals for energy supply. The received RF signal is the power signal of the rectifier. It does not have the ability to generate carrier waves and has the lowest power consumption.

[0106] The other is a semi-passive device. This type of backscatter communication device has energy storage capacitors or batteries and relies on non-RF signals to store energy. Optionally, this type of backscatter communication device is equipped with a power amplifier (PA) or a low noise amplifier (LNA) or other active devices. Its downlink reception or uplink reflection has a certain amplification capability, but does not have the ability to generate carrier waves, and its power consumption is second only to that of the passive device.

[0107] Another type is active devices, such as active tags. This type of backscatter communication device has the ability to actively send, is equipped with energy storage capacitors or energy storage batteries, relies on non-RF signals for power supply, can send information to the reader / writer device without relying on the reflection of the incident signal, has carrier generation capability, and has the highest power consumption.

[0108] In a backscatter communication system, a backscatter communication device, such as a tag device, can receive control signals or carrier signals from a read / write device, such as a reader, and modulate the data to be transmitted onto the carrier signal and send it out according to the instructions. Backscatter communication devices generally include passive devices or semi-passive devices, which can use radio frequency signals from other devices or environments to modulate signals to transmit their own information. That is, passive devices or semi-passive devices are devices that modulate and reflect based on downlink radio frequency signals. For active devices, they can either generate carrier signals by themselves and modulate information based on the carrier signals they generate, or they can modulate using radio frequency signals from other devices or environments like passive devices or semi-passive devices.

[0109] Figure 2 This is a schematic diagram of the structure of the backscatter communication equipment. Its basic components and main functions include:

[0110] Antenna unit: used to receive incident RF signals, control signaling, and to send modulated backscatter signals;

[0111] Energy harvester module or battery module: used for backscatter communication equipment to harvest radio frequency energy or other energy, including but not limited to solar energy, kinetic energy, mechanical energy, thermal energy, etc. In addition to the energy harvester module, it may also include a battery power module. In this case, the backscatter communication equipment is a semi-passive device. The energy harvester module or battery power module supplies power to all other modules in the device;

[0112] Micro-controller: used to control baseband signal processing, energy storage or data scheduling status, switch switching, system synchronization, etc.

[0113] Information Receiver module: used to demodulate control signals or data sent by read / write devices or other network nodes;

[0114] Channel Coding & Modulation Block: used to perform channel coding and signal modulation under the control of the microcontroller, and to achieve modulation by selecting different load impedances through a selection switch under the control of the microcontroller;

[0115] Memory or sensing module: used to store device ID information, location information or sensor data, etc.

[0116] In addition to the above-mentioned basic building blocks, the backscatter communication device may also integrate a tunnel diode amplifier module, a low noise amplifier module, etc., to improve the receiving sensitivity and transmitting power of the backscatter communication device.

[0117] Figure 3 The following is a schematic diagram of the structure of the read / write device. In a traditional RFID system, the read / write device can be a reader or a reader. Its basic components and main functions include:

[0118] Antenna unit: used to receive modulated backscatter signals (Modulation backscatter signals);

[0119] Backscatter signal detection module: used to detect the backscatter signal sent by the backscatter communication equipment, such as Amplitude Shift Keying (ASK) detection, Phase Shift Keying (PSK) detection, Frequency Shift Keying (FSK) detection or Quadrature Amplitude Modulation (QAM) detection. The detection process may include envelope averaging, threshold calculator, comparison, etc.

[0120] Demodulation & Decoder module: used to decode the detected signal to restore the original information stream, that is, the original data.

[0121] Figure 4 The figure shows a schematic diagram of the modulation principle of backscatter communication. The backscatter communication device controls the reflection coefficient Γ of the circuit by adjusting its internal impedance, thereby changing the amplitude, frequency, phase, etc. of the incident signal to achieve signal modulation.

[0122] The reflection coefficient of the signal can be expressed as:

[0123]

[0124] Among them, Z 0 represents the antenna characteristic impedance, Z 1 Represents the load impedance. Assume that the input incident signal is S in (t), then the modulated backscattered signal output is The reflection coefficient (Γ T =Γ 0 , Γ T =Γ 1 , Γ T =Γ 2 ,……,Γ T =Γ n ), the corresponding amplitude modulation, frequency modulation or phase modulation can be realized by using the channel coding and modulation module.

[0125] The controller can control the reflection coefficient according to the following relationship:

[0126] The symbol 0 corresponds to an impedance of 0;

[0127] Symbol 1 corresponds to impedance 1;

[0128] Symbol 2 corresponds to impedance 2;

[0129] …

[0130] The symbol n corresponds to impedance n.

[0131] 3. Information transmission between RFID reading and writing devices, such as gNB / reader and backscatter communication devices, such as tag devices

[0132] like Figure 5 As shown, the read / write device can send instructions of the types of selection (Select), inventory (Inventory) and access (Access) to the backscatter communication device, and the status of the backscatter communication device side can include ready (Ready), arbitration (Arbitrate), response (Reply), acknowledgement (Acknowledged), open (Open), protection (Secured), destruction (Killed), etc.

[0133] In the inventory mode, the read / write device selects the backscatter communication device, sends a query (Query) command, and the backscatter communication device responds (Reply), that is, generates a 16-bit random number to the read / write device, and then the read / write device sends the random number sequence to the backscatter communication device through the confirmation response (ACK) command. The backscatter communication device sends the relevant data to the read / write device, such as the protocol control word (PC), the extended protocol control word (XPC), the electronic product code (EPC), the packet cyclic redundancy check (Packet Cyclic Redundancy Check, Packet CRC), etc. If the EPC is valid, the read / write device can send a repeated query (QueryRep) command or other commands. If the EPC is invalid, the read / write device can send a negative acknowledgment (NAK). From the read / write device sending the query command to the read / write device receiving the relevant data sent by the backscatter communication device is a single backscatter communication device response process.

[0134] 4. Backscatter Communication Perception

[0135] The backscatter communication equipment is installed on the perception target or deployed in the vicinity of the perception target. The receiving device (receiver) of the backscatter communication system can perform a series of operations such as detection, signal classification, and perception parameter estimation on the backscatter signal of the backscatter communication equipment to achieve the purpose of perception or synaesthesia integration.

[0136] Backscatter-based sensing or synaesthesia integration has the following advantages:

[0137] (1) By installing different backscatter communication devices on different sensing targets or in the surrounding areas of the targets, the sensing or synaesthesia integrated receiver can distinguish different sensing targets according to the different backscatter signal characteristics of different backscatter communication devices, and realize the accurate association between sensing targets and sensing data in multi-target sensing. In addition, the backscatter communication device can also obtain sensing target information, such as target type information, motion state information, internal sensor information, etc., and realize information exchange through backscatter communication, thereby realizing low-cost and low-power synaesthesia integration.

[0138] (2) By integrating a power amplifier on the backscatter communication device or using a multi-antenna beamforming design, the signal strength of the backscatter signal of the backscatter communication device can be improved, and the perception signal-to-noise ratio or communication signal-to-noise ratio can be improved, thereby improving the reliability of perception or synaesthesia integration. For the perception of device decoupling that does not use backscatter technology, the reflection characteristics of the perceived target are related to the size, material, shape, orientation, etc. of the perceived target, and its reflection characteristics are not controllable. However, perception based on backscattering can solve this problem by flexibly controlling the antenna array gain of the backscatter communication device;

[0139] (3) For the perception of tiny signals in interference environments, such as human breathing, object vibration, and liquid drip rate monitoring, backscatter-based perception has obvious advantages over non-backscatter-based perception. By rationally designing the signal processing flow, tiny signal amplification and effective suppression or elimination of environmental interference can be achieved, thereby improving the sensitivity and anti-interference ability of the perception system;

[0140] (4) Taking advantage of the low cost, low power consumption, small size and easy deployment of backscatter communication equipment, multiple backscatter communication devices are deployed in the environment (for example, near the sensing target) to perform joint sensing and processing on the backscatter signals of multiple backscatter communication devices at different locations. This can increase the sensing range, that is, increase the sensing physical distance and physical angle range, and increase the sensing network density. In addition, the sensing signal-to-noise ratio can be improved, the sensing resolution can be improved, and the sensing error can be reduced.

[0141] Some common sensing services are shown in Table 1:

[0142]

[0143] Table 1

[0144] 5. Non-ideal factors of backscatter communication system

[0145] In a backscatter communication system, a device that sends control signaling or carrier signals to a backscatter communication device is a sending device, or a sending end, and a device that receives backscatter signals from a backscatter communication device is a receiving device, or a receiving end, of the backscatter communication system.

[0146] The non-ideal factors of the backscatter communication system are as follows:

[0147] Sampling Time Offset (STO): The clocks of the transmitter and receiver are not synchronized, which results in the sampling clocks of the digital to analog converter (DAC) at the transmitter and the analog to digital converter (ADC) at the receiver being inconsistent. The existence of STO adds a time offset to the time of flight (ToF) of each propagation path, that is, the original phase offset between subcarriers is increased by the phase offset caused by ToF, and the phase offset caused by STO is also increased;

[0148] Sampling Frequency Offset (SFO): It is also caused by the clock asynchrony between the transmitter and the receiver. It is equivalent to adding noise to the phase offset caused by STO between subcarriers, which may cause ToF errors in multiple estimates of the same propagation path, and there is also the problem of inconsistent estimated values.

[0149] Carrier Frequency Offset (CFO): Limited by the hardware capabilities of the backscatter communication equipment, the poor stability of the crystal oscillator will introduce local oscillator frequency deviation, and when modulating data, the carrier frequency offset will be introduced as the switch switches different load impedances. Secondly, when the backscatter communication equipment moves, it will generate a Doppler frequency shift relative to the transceiver, and this Doppler frequency shift will also cause a carrier frequency offset to the backscatter communication system;

[0150] Phase rotation of reflection coefficient: When the backscatter communication device switches impedance modulation data, the phase of the reflection coefficient will change due to the change in impedance, which will be superimposed on the carrier signal to cause phase rotation. In addition, when switching different impedances, a distance offset will be introduced, that is, a distance offset introduced by the impedance switching of the backscatter communication device is superimposed on the distance between the backscatter communication device and the read-write device, and the offset is related to the size of the impedance;

[0151] Phase rotation due to environmental changes or carrier frequency changes: The input impedance of the backscatter communication device has a nonlinear relationship with the temperature, humidity, and carrier frequency of the environment. When the environment or carrier frequency changes, the input impedance of the backscatter communication device will change, further affecting the matching degree and causing phase rotation on the backscatter communication device side. It is worth noting that this problem can be avoided by a self-tuning network;

[0152] Phase rotation introduced by the transmission line: If On-Off-Keying (OOK) modulation is performed by matching / mismatching, this problem does not exist because the backscatter signal does not enter the backscatter communication device side. If OOK, FSK or PSK modulation based on a reflection amplifier is used, the phase rotation introduced by the transmission line cannot be ignored because the signal needs to be processed through the transmission line. This problem can be avoided by having multiple read-write devices receive the backscatter signal sent by the backscatter communication device for estimation and processing.

[0153] 6. Backscatter communication positioning

[0154] Backscatter communication equipment has the characteristics of low cost, low power consumption and small size. It can be widely used in scenarios such as warehousing and logistics, industrial manufacturing, smart cities, and smart homes, such as inventory and tracking of goods, finding personal belongings, locating vehicles in parking lots, locating shops in shopping malls, and locating platforms in museums. Table 2 takes backscatter communication equipment as a tag device as an example to show the business categories, indicator requirements, etc. involved in several typical positioning scenarios based on backscatter communication from different dimensions. The positioning types based on backscattering can be divided into tag self-positioning and tag-assisted positioning. Among them, tag self-positioning generally requires the tag device to be bound to the object, and the positioning of the object is achieved by positioning the tag device; tag-assisted positioning is generally based on the tag device to assist the positioning of other network devices. When positioning the tag device, the positioning device used for calculation, coordination, and control can be a base station or access point (Access Point, AP), or a terminal and other devices.

[0155]

[0156] Table 2

[0157] The measurement parameters required to support backscatter communication positioning include received signal strength (RSS), received signal strength indication (RSSI), direction of arrival (DOA), phase information, time of arrival (TOA) or round-trip time (RTT), time difference of arrival (TDOA), phase difference of arrival (PDOA), etc.

[0158] Considering that the transmission power of the device is known, the RSS / RSSI parameters can be used to estimate the absolute distance between the reader and the tag device, but this method has the disadvantages of being susceptible to environmental interference and low accuracy. The performance of the DOA-based estimation method is better than that of the RSS / RSSI-based estimation method, but this method requires the reader to be equipped with multiple receiving antennas, and the measured phase is susceptible to the non-line of sight (NLOS) path, environmental noise, etc. The TOA or RTT-based estimation method needs to use the propagation time of the signal in the air interface to calculate the distance between the anchor device and the tag device. This method requires the transmission signal to be timestamped to assist in the measurement, and requires strict clock synchronization between the anchor device and the tag device. The TDOA-based estimation method is to perform positioning by measuring the difference in the propagation time of the signal of multiple anchor devices, but the positioning accuracy is also affected by the clock synchronization error between different reader devices.

[0159] In summary, the current backscatter communication positioning methods are divided into distance-based methods and distance-independent methods. Among them, distance-based methods include distance measurement, angle measurement, etc.; distance-independent methods include fingerprint recognition and non-fingerprint recognition methods, etc. Table 3 takes the backscatter communication device as a tag device as an example to summarize several typical backscatter communication-based positioning methods. Since non-rational factors such as the mobility of the tag device, the hardware capabilities of the transceiver device, and the wireless channel environment will affect the positioning accuracy of the tag device, when positioning the tag device by angle measurement, distance measurement or non-fingerprint recognition methods, it is necessary to consider the influence of non-ideal factors such as multipath environment, thermal noise and synchronization error between different devices. For the tag device, it is necessary to eliminate the frequency deviation caused by the poor stability of the crystal oscillator; for the receiving device, it is necessary to eliminate the sampling timing error and sampling frequency error introduced by the hardware, as well as the phase shift introduced by thermal noise; in addition, it is also necessary to consider the influence of the receiving phase superposition multipath effect due to the presence of Line of Sight (LOS) path and NLOS path in the environment.

[0160]

[0161] Table 3

[0162] Limited by the hardware capabilities of backscatter communication equipment, as well as objective environmental factors such as signal attenuation and strong signal interference in two-way channels, positioning based on backscatter communication generally has problems such as low positioning accuracy and poor stability. In addition, the mobility of backscatter communication equipment is also a key factor affecting positioning accuracy and stability.

[0163] In addition to the low signal-to-noise ratio (SNR) and the measurement errors introduced by the mobility of backscatter communication devices, the positioning technology based on backscatter communication also has the following technical difficulties:

[0164] (1) Non-ideal factors: As mentioned above, the non-ideal factors of the backscatter communication system seriously affect the positioning performance of the backscatter communication equipment. For example, positioning based on TOA or TDOA needs to eliminate the influence of CFO on the backscatter communication equipment side and STO and CFO on the transceiver side; while positioning based on PDOA can ignore the influence of CFO on the backscatter communication equipment side, and focus on the problems such as the deterioration of phase measurement accuracy caused by STO and CFO on the transceiver side;

[0165] (2) Narrow channel bandwidth: Limited by the switching rate of the load impedance switch in the modulation circuit, the bandwidth of the backscattered signal is usually very small, which affects the positioning accuracy based on ranging methods such as TOA, TDOA, and RTT;

[0166] (3) Few antennas: Due to the limitations of hardware cost, power consumption and volume, backscatter communication equipment does not integrate too many antennas, which affects the positioning accuracy of angle measurement methods such as AOA and DOA. Most existing technologies use multiple antennas on the base station side to assist in measuring the incident angle of the backscatter signal, but the robustness of this solution is poor.

[0167] 7. Network architecture based on backscatter communication

[0168] The network topology of the backscatter communication system is as follows: Figures 6 to 10 shown.

[0169] Figure 6 The topology shown is also called a monostatic backscatter communication system (MBCS) architecture, that is, a single-base architecture. The traditional RFID system is a typical MBCS. MBCS includes backscatter communication equipment and read-write equipment. The backscatter communication equipment is such as a tag device, and the read-write equipment is such as a base station. In this architecture, the backscatter communication equipment communicates directly with the network-side equipment, such as a base station, which serves as a read-write device. The network-side equipment may have a functional module of a frequency division duplex (FDD) full-duplex architecture. Figure 6 In the topology shown, the device that sends control signaling to the backscatter communication device is the same device as the device that receives the backscatter signal, while the device that sends the RF carrier signal can be the same device as the aforementioned device or a different device.

[0170] exist Figure 7 In the topology shown, an intermediate node is deployed between the network side device, such as a base station and the backscatter communication device. The backscatter communication device communicates with the intermediate node in a two-way manner. The intermediate node communicates with the network side device through the air interface Uu port to transmit information between the network side device and the backscatter communication device. The backscatter communication device receives the control signaling and carrier signal sent by the intermediate node. The control signaling is indicated by the network side device through the intermediate node. The intermediate node can be a terminal, a repeater, an Integrated Access Backhaul node (IAB) node, etc. The intermediate node can also act as a relay to forward IoT data to the network side device.

[0171] exist Figure 8 In the topology shown, the backscatter communication device sends IoT data / uplink signaling to the network side device, such as the base station, and receives data / signaling from the assisting node; Fig. 9In the topology shown, the backscatter communication device receives data / signaling from the network side device, such as the base station, and sends IoT data / uplink signaling to the auxiliary node. Figure 8 , Fig. 9 In the topology shown, the auxiliary node communicates with the network side device through the Uu port. The auxiliary node can be an IAB, a terminal, a repeater, etc. Figure 8 , Fig. 9 The topology shown can be called a bistation backscatter communication system (BBCS) architecture, that is, a dual-base architecture. Different from the MBCS system, the RF radio source, the transmitting device of the backscatter communication system and the receiving device of the backscatter communication system in the BBCS are all separated.

[0172] exist Fig.10 In the topology shown, the terminal acts as a read-write device and performs bidirectional communication with the backscatter communication device. This architecture also belongs to the MBCS architecture, but the difference is that the read-write device here is the terminal, not the network-side device.

[0173] 8. Synaesthesia Architecture Based on Backscatter Communication

[0174] Based on several network structures of the backscatter communication system, different perception architectures are given in the case of decoupling / coupling of the backscatter communication device and the perception target. Among them, the first device is the perception service initiator with perception needs, and nodes A and B can be base stations, terminals, dedicated readers and writers, etc., which are not specifically distinguished here. In addition, the RF source device and the control signaling sending device can also be intermediate nodes / auxiliary nodes such as repeaters and IABs.

[0175] Fig.11 The synaesthesia architecture shown is a dual-base architecture with A transmitting and B receiving. This architecture considers the coupling of the backscatter communication device with the sensing target, and the backscatter communication device receives the control signaling and carrier signal sent by node A, and sends an uplink preamble and backscatter signal to node B.

[0176] Fig.12 The synaesthesia architecture shown is a single-base architecture with A transmitting and A receiving. This architecture considers the coupling of the backscatter communication device with the sensing target, and the backscatter communication device receives the control signaling and carrier signal sent by node A, and sends an uplink preamble code and backscatter signal to node A.

[0177] Fig.13The synaesthesia architecture shown is a dual-base architecture with A transmitting and B receiving. This architecture considers the decoupling of the backscatter communication device from the sensing target. The backscatter communication device receives the control signaling and carrier signal CW1 sent by node A, and receives the carrier signal CW2 reflected by the sensing target. Node B receives the uplink preamble and backscatter signal sent by the backscatter communication device, and receives the signal reflected by the sensing target.

[0178] In this synaesthesia architecture, the downlink reception of the backscatter communication device includes two parts: CW1 sent by the transmitter and CW2 reflected by the sensing target (assuming that there is no NLOS path in the wireless communication environment). The backscatter communication device assists the receiving end in sensing the sensing target based on the two received signals CW1 and CW2. Among them, CW2 can be forwarded based on CW1, or it can be actively generated by the sensing target.

[0179] Assume that the spatial coordinates of nodes A and B are known, and the perceived target moves in a certain direction. The frequency of CW2 has a Doppler frequency deviation compared to CW1. When the backscatter communication device reflects based on CW2, the backscatter signal received by node B (corresponding to the auxiliary perception link) can enhance the perception performance of the perceived target, thereby reducing the perception power consumption and saving perception resources. Specifically, node A-perceived target-node B corresponds to Doppler frequency deviation A; node A-perceived target-backscatter communication device-node B corresponds to Doppler frequency deviation B. Assuming that the velocity vector of the perceived target can be decomposed into radial velocity and tangential velocity, the velocity vector of the perceived target can be obtained by jointly solving the information of Doppler frequency deviation A and Doppler frequency deviation B, combined with the spatial coordinates of the backscatter communication device.

[0180] Limited by the low-complexity hardware capabilities of the backscatter communication device, when the backscatter communication device forwards or modulates CW2, non-ideal factors such as frequency error on the backscatter communication device side will be generated. In addition, there is a delay difference between the auxiliary sensing path (sensing target->backscatter communication device->Node B) and the direct sensing path (sensing target->Node B). The delay difference consists of two parts: 1) The propagation delay of the two paths to reach Node B is different; 2) The delay caused by the modulation on the backscatter communication device side. Furthermore, the delay difference will cause the phase shift of the sensing signal.

[0181] Assume that the symbol of CW2 is s(n), and its symbol period is Ts, and the symbol transmitted by the backscatter communication device is c(n), and its symbol period is Tc. Wherein, Tc=L×Ts, and L is the spreading factor of the auxiliary sensing link. When L is larger, the auxiliary sensing link changes the waveform characteristics of the sensing direct path less, and the multipath gain of the sensing direct path is more obvious, but the amount of data that the backscatter communication device can carry per unit time is smaller.

[0182] Fig.14The synaesthesia architecture shown is a single-base architecture with A transmitting and A receiving. This architecture considers the decoupling of the backscatter communication device from the sensing target. The backscatter communication device receives the control signaling, CW1 sent by node A, and CW2 reflected by the sensing target, and sends the uplink preamble and backscatter signal to node A. At the same time, the sensing target will also receive the uplink backscatter signal of the backscatter communication device and reflect the backscatter signal to node A.

[0183] The above introduces the relevant technologies and concepts involved in the embodiments of the present application, from which it can be obtained that when the backscatter communication device is decoupled from the perception target (the backscatter communication device is very close to the perception target), or when the backscatter communication device is coupled with the perception target, the backscatter communication device serves as an intermediate device to assist the perception target in enhancing the perception performance, and its backscatter signal can assist in the perception of the perception target. When the backscatter communication device modulates the signal reflected by the perception target, it is inevitably introduced due to the limitations of the hardware capabilities of the backscatter communication device and the special modulation method. In addition, due to the delay difference between the perception direct path and the auxiliary perception path, the auxiliary perception path has a phase offset relative to the perception direct path. Therefore, it is necessary to eliminate or compensate for the frequency error and phase offset introduced by the modulation of the backscatter communication device.

[0184] In addition, the spreading factor modulated by the backscatter communication device will affect the perception performance of the auxiliary perception link. For example, when the spreading factor is small, the modulation rate of the backscatter communication device is improved, but the gain of its auxiliary perception is small, mainly because the waveform characteristics of the direct path of perception of the auxiliary perception link change quickly, which affects the perception performance of the receiving end, such as the perception resolution.

[0185] Therefore, in order to improve the receiving end's perception capability of the perception target when the backscatter communication equipment participates in the perception, the corresponding transmission process and indication information need to be defined.

[0186] The signal processing method provided in the embodiment of the present application is described in detail below through some embodiments and their application scenarios in combination with the accompanying drawings.

[0187] See also Fig.15 FIG. 1 is a flowchart of a signal processing method according to an embodiment of the present invention, wherein the method comprises the following steps:

[0188] S1510: The first communication device obtains perception demand information and first information.

[0189] The sensing requirement information is used to indicate the sensing information required by the sensing service initiator, and the first information is used to indicate the transmission resource information and modulation information of the second communication device;

[0190] The modulation information includes at least one of the following:

[0191] Modulation method;

[0192] Spreading factor of the modulation;

[0193] Modulation rate;

[0194] Backscatter Link Frequency (BLF);

[0195] S1520: The first communication device receives, based on the perception requirement information and the first information, from the second communication device a second signal generated based on the first information and the first signal.

[0196] By applying the method provided in the embodiment of the present application, after the first communication device obtains the perception demand information and the first information, based on the perception demand information and the first information, the second signal generated based on the first information and the first signal is received from the second communication device, wherein the perception demand information is used to indicate the perception information required by the initiator of the perception service, the first information is used to indicate the transmission resource information and modulation information of the second communication device, the modulation information includes at least one of the modulation mode, the spreading factor of the modulation, the modulation rate and the backscatter link frequency, the second signal is generated based on the first information and the first signal, the first communication device receives the second signal based on the perception demand information and the first information, and the perception performance of the perception target can be enhanced through the second signal.

[0197] The technical solution provided in the embodiment of the present application can be applied in a dual-base architecture or a single-base architecture. The first communication device is a receiving device of a backscatter communication system, which can be a base station, a reader, a relay, a terminal, etc. The second communication device is a backscatter communication device, which can be a tag device, a terminal, etc. The second communication device can include a passive device, a semi-passive device, and an active device. The second communication device can be decoupled or coupled with the sensing target.

[0198] In a dual-base architecture, the first communication device includes a backscatter communication receiving end, and the third communication device is a transmitting device of the backscatter communication system, including an RF radio frequency source, and the following conditions exist:

[0199] The first communication device is a terminal, the third communication device is a base station or a reader or a relay, and the second communication device is a backscatter communication device.

[0200] In a single-base architecture, the first communication device is both a transmitting device and a receiving device of the backscatter communication system, including a backscatter communication receiving end and an RF radio source. There are the following situations:

[0201] 1) The first communication device is a base station, a reader or a relay, and the second communication device is a tag device;

[0202] 2) The first communication device is a terminal, and the second communication device is a tag device;

[0203] 3) The first communication device is a base station or a relay, and the second communication device is a terminal.

[0204] After the first communication device obtains the perception demand information and the first information, it can receive a second signal from the second communication device based on the perception demand information and the first information, where the second signal is a backscattered signal generated by the second communication device based on the first information and the first signal. The perception demand information and the first information can be carried by the same information or by different information, and the perception demand information can also be included in the first information.

[0205] The sensing requirement information is used to indicate the sensing information required by the sensing service initiator, which may include environmental information within the sensing range or characteristic information of the sensing target within the sensing range. Figures 11 to 14 The first device may include a third-party device, an application server, a core network device, etc.

[0206] The environmental information within the sensing range may include, but is not limited to, spatial maps, humidity, temperature, brightness, atmospheric pressure, air quality, weather conditions, topography, building / vegetation distribution, headcount, crowd density, vehicle density, etc. within the sensing range;

[0207] The characteristic information of the perceived target within the perception range refers to the information that can reflect the attributes or status of the perceived target, which may include but is not limited to the spatial coordinates of the perceived target, the speed of the perceived target, the acceleration of the perceived target, the material of the perceived target, the shape of the perceived target, the category of the perceived target, the radar cross-section (RCS) of the perceived target, the status of the perceived target, such as the monitored health status, etc.

[0208] The first information is used to indicate the transmission resource information and modulation information of the second communication device. The transmission resource information includes time domain resource information, frequency domain resource information, code domain resource information, polarization domain resource information, etc. The modulation information includes at least one of the modulation mode, the spreading factor of the modulation, the modulation rate, and the backscatter link frequency.

[0209] The first information indicates the transmission resource information of the second communication device, the purpose of which is to eliminate non-ideal factors introduced by the backscatter communication device side, such as frequency offset error or phase offset. The first information indicates the modulated spreading factor or modulation rate or backscatter link frequency of the second communication device to improve the perceived SNR or signal to interference plus noise ratio (Signal to Interference plus Noise Ratio, SINR).

[0210] For example, Fig.16 As shown, the first information instructs the second communication device to modulate and reflect from time unit 2, and time unit 0 and time unit 1 are used to eliminate the phase rotation introduced by the second communication device due to modulation. The backscatter communication device can be in an absorption state in time unit 0 and time unit 1, and optionally, the absorbed signal energy can be used for energy storage of the backscatter communication device. CMD represents a control command.

[0211] In a single-base architecture, the first signal may be a carrier signal sent by a first communication device to a second communication device. In a dual-base architecture, the first signal may be a carrier signal sent by a third communication device to a second communication device. The first signal may include a single-frequency signal or a broadband signal, such as an orthogonal frequency division multiplexing (OFDM) signal, a chirp signal, etc. The first signal may also include other new waveform signals.

[0212] When the first information indicates that the modulated spreading factor is N (N≥1), it means that the modulation symbol period of the backscatter communication device is equal to N symbol periods of the modulated first signal, or N chirp symbol periods of the chirp signal. The benefits of configuring the spreading factor are:

[0213] The time unit of a backscatter communication device is equal to N time units of the modulated first signal, which produces a spread spectrum effect of the backscatter signal, accumulates more energy in one backscatter time unit, and effectively improves the perceived SNR;

[0214] Since the backscattering time unit is N times the first signal period, the perceived measurement error of the backscattering path of the backscattering communication device introduced due to fast channel fading can be reduced.

[0215] In some embodiments of the present application, the modulation mode may include a total reflection modulation mode or a modulation mode corresponding to impedance switching (on-off). In the case where the modulation mode only includes the total reflection modulation mode, the modulation information may only include the modulation mode, excluding the modulated spreading factor, modulation rate, backscatter link frequency, etc. The second communication device may fully reflect the first signal based on the first information, that is, no absorption processing is performed on the first signal.

[0216] The modulation mode corresponding to the impedance switching may include at least one of amplitude modulation, phase modulation, frequency modulation, and pulse modulation. The backscatter communication device may modulate the first signal to generate a second signal according to the first information at the time domain position and frequency domain position indicated by the first information using the indicated modulation mode and modulation rate.

[0217] In some embodiments of the present application, the first communication device obtains the perception requirement information and the first information, which may include one of the following:

[0218] The first communication device receives the perception demand information from the third communication device or the fourth communication device, and receives the first information from the third communication device or the third-party device;

[0219] The first communication device determines first information and receives perception demand information from the fourth communication device.

[0220] In the embodiment of the present application, the fourth communication device may be a sensing service initiator, such as Figures 11 to 14 The first device in.

[0221] In a single-base architecture, the fourth communication device may send the sensing demand information to the first communication device, and the first communication device may receive the sensing demand information from the fourth communication device. In addition, the first communication device may determine the first information, or receive the first information from a third-party device, and then send the first information to the second communication device, and the second communication device may receive the first information from the first communication device.

[0222] In a dual-base architecture, the fourth communication device may send perception demand information to the first communication device and the third communication device respectively, and the first communication device and the third communication device receive the perception demand information from the fourth communication device. Alternatively, the fourth communication device may send perception demand information to the first communication device, the first communication device receives the perception demand information from the fourth communication device, forwards the perception demand information to the third communication device, and the third communication device receives the perception demand information from the first communication device. Alternatively, the fourth communication device may send perception demand information to the third communication device, the third communication device receives the perception demand information from the fourth communication device, forwards the perception demand information to the first communication device, and the first communication device receives the perception demand information from the third communication device. In addition, the first communication device and the second communication device may receive the first information from the third communication device or a third-party device.

[0223] The first communication device obtains the perception requirement information and the first information to receive the second signal based on the perception requirement information and the first information.

[0224] In some embodiments of the present application, the first communication device receives from the second communication device a second signal generated based on the first information and the first signal, which may include the following steps:

[0225] The first communication device measures a second signal generated based on the first information and the first signal and sent to the second communication device to obtain a perception measurement value.

[0226] In the embodiment of the present application, the first communication device may receive the second signal by demodulating or measuring. After obtaining the perception requirement information and the first information, the first communication device may measure the second signal sent by the second communication device to obtain the perception measurement value.

[0227] In some embodiments of the present application, after the first communication device obtains the perception measurement amount, the method may further include the following steps:

[0228] The first communication device reports the perception measurement amount.

[0229] In an embodiment of the present application, the first communication device measures the second signal generated based on the first information and the first signal received from the second communication device, and after obtaining the perception measurement amount, the perception measurement amount can be further reported. Optionally, the first communication device can report the perception measurement amount to the third communication device or the fourth communication device or the third-party device, and the third communication device or the fourth communication device or the third-party device performs further operations according to the perception measurement amount.

[0230] Optionally, the perception measurement amount may include demodulation information of the second signal or a measurement amount of a perception target associated with the second communication device.

[0231] The demodulation information of the second signal may include at least one of the following:

[0232] The received signal strength indication of the second signal, the received power of the second signal, the phase of the second signal, the timestamp information of the second signal (the time information inserted when the second communication device or each second communication device in the second communication device array transmits a signal), the backscatter path channel matrix of the second communication device, the backscatter path channel state information of the second communication device, the multipath parameters in the backscatter path multipath channel of the second communication device (such as the number of multipaths, the power of each path, the delay, the angle, etc.), the Doppler frequency and the Doppler spread of the second signal, the departure angle of the second signal (that is, the departure angle of the transmitted signal of the second communication device or the second communication device array), the arrival angle of the second signal (that is, the angle at which the first communication device receives the reflected signal of the second communication device or the second communication device array) angle), phase difference between second communication devices (for example, phase difference between different second communication devices in the second communication device array), delay difference between second communication devices (for example, delay difference between different second communication devices in the second communication device array), phase difference between antennas of second communication devices (i.e. phase difference between different antennas of the same second communication device), delay difference between antennas of second communication devices (i.e. delay difference between different antennas of the same second communication device), unique identification information of the second communication device (the unique identification information is used to distinguish each second communication device, or to distinguish each second communication device within the perception range, such as the ID of the second communication device or the unique waveform sequence reflected by the second communication device), spatial coordinates of the second communication device, and rate of the second communication device.

[0233] The measurement quantity of the perception target associated with the second communication device may include at least one of the following:

[0234] The spatial coordinates of the perceived target, the speed of the perceived target, the acceleration of the perceived target, the material of the perceived target, the shape of the perceived target, the category of the perceived target, the radar cross-sectional area of ​​the perceived target, the state of the perceived target, such as the monitored health status, etc.

[0235] In some embodiments of the present application, before the first communication device measures the second signal generated based on the first information and the first signal and sent by the second communication device, the method may further include the following steps:

[0236] The first communication device eliminates non-ideal factors based on the first information and the second signal sent by the second communication device.

[0237] In the embodiment of the present application, the first information may be used to indicate at least one of the following:

[0238] Totally reflecting the first signal in a first time unit;

[0239] Performing modulation corresponding to impedance switching on the first signal in a second time unit;

[0240] The first signal is fully absorbed or kept silent during the third time unit.

[0241] The second communication device can receive the first information and the first signal, and generate the second signal according to the first information and the first signal. According to the instruction of the first information, the second communication device can fully reflect the first signal in the first time unit, and the second signal received by the first communication device from the second communication device according to the first information includes a 1-bit backscatter signal, corresponding to the full reflection state. According to the instruction of the first information, the second communication device can modulate the first signal corresponding to the impedance switching in the second time unit, and the second signal received by the first communication device from the second communication device according to the first information includes a 1-bit backscatter signal, corresponding to the modulation state. According to the instruction of the first information, the second communication device can fully absorb the first signal in the third time unit, or remain silent, and the second signal received by the first communication device from the second communication device according to the first information may include a 0-bit backscatter signal, corresponding to the full absorption state, or the first communication device determines that the second communication device remains silent in the third time unit according to the first information.

[0242] It should be noted that the first time unit, the second time unit, and the third time unit are only used to distinguish different time units, and there is no time sequence restriction. The first time unit, the second time unit, and the third time unit may include one or more time units respectively. The time unit may be a random access opportunity (RACH Occasion, RO).

[0243] The first communication device can eliminate non-ideal factors based on the first information and the second signal, such as eliminating non-ideal factors at the transceiver end or non-ideal factors at the second communication device side. After eliminating the non-ideal factors, the first communication device demodulates or measures the second signal. This helps to improve the demodulation accuracy or measurement accuracy of the second signal.

[0244] In some embodiments of the present application, after the first communication device eliminates non-ideal factors and before the first communication device measures the second signal generated based on the first information and the first signal and sent by the second communication device, the method may further include the following steps:

[0245] The first communication device performs interference cancellation based on the first information, the second signal and the third signal, where the third signal includes a direct link signal or a self-interference signal.

[0246] In the embodiment of the present application, in a dual-base architecture, the third signal includes a direct link signal, which is a direct path signal sent by the third communication device to the first communication device. In a single-base architecture, the third signal includes a self-interference signal, which is a signal leaked from the transmitting end of the first communication device to the receiving end.

[0247] After eliminating non-ideal factors, the first communication device can perform direct link interference elimination or self-interference elimination based on the first information, the second signal and the third signal, and then measure the second signal after performing interference elimination, which helps to further improve the measurement accuracy of the second signal.

[0248] Taking a dual-base architecture as an example, before measuring the second signal, the first communication device estimates and eliminates non-ideal factors between the third communication device and the first communication device, and between the second communication device and the first communication device.

[0249] For non-ideal factor elimination, the first communication device can eliminate non-ideal factors on the transceiver and the second communication device side according to the first information and the second signal, including FO and TO of the transceiver, and phase offset and frequency offset errors introduced by the modulation of the second communication device. Wherein, the second signal is a multipath signal, and the first communication device can select a reference path (for example, a perceived direct path from the perceived target to the first communication device) to estimate and compensate for the phase offset and frequency offset errors of the reflection path of the second communication device.

[0250] In addition, when the direct link interference from the third communication device to the first communication device is strong, after eliminating non-ideal factors, it is also possible to consider eliminating the interference of the direct link.

[0251] For backscatter path identification, the backscatter path contains different multipath components. For example, the third communication device-second communication device-first communication device, the third communication device-sensing target-second communication device-first communication device have different delays, and the first communication device can distinguish different paths in the backscatter path based on the phase of the reference path and the backscatter path.

[0252] In some embodiments of the present application, before the first communication device receives, from the second communication device, a second signal generated based on the first information and the first signal, the method may further include one of the following:

[0253] The first communication device sends first information or a first signal to the second communication device;

[0254] The first communication device instructs the third party device to send first information or a first signal to the second communication device.

[0255] In the embodiment of the present application, under the single base station architecture, the first communication device may first determine the first information and send the first information or the first signal to the second communication device, or the first communication device may instruct the third party device to send the first information or the first signal to the second communication device. That is, the second communication device receiving the first information and the first signal may include: the second communication device receiving the first information or the first signal from the first communication device, or the second communication device receiving the first information or the first signal from the third party device.

[0256] Under this architecture, the first communication device maintains a synchronization state with the third-party device. The third-party device can send the first information or the first signal to the second communication device according to the instruction of the first communication device, and can also send the first information or the first signal to the second communication device according to predefined content.

[0257] In the dual-base architecture, the third communication device can determine the first information, send the first information to the first communication device and the second communication device, send the first signal to the second communication device, or instruct the third-party device to send the first information to the first communication device and the second communication device, or instruct the third-party device to send the first signal to the second communication device. That is, the second communication device can receive the first information or the first signal from the third communication device or the third-party device.

[0258] Under this architecture, the third communication device maintains a synchronized state with the third-party device. The third-party device can send the first information to the first communication device and the second communication device, or send the first signal to the second communication device according to the instructions of the third communication device. It can also send the first information to the first communication device and the second communication device, or send the first signal to the second communication device according to predefined content.

[0259] The second communication device receives the first information and the first signal, so that the second communication device processes the first signal accordingly according to the instruction of the first information, that is, generates a second signal based on the first information and the first signal, and sends the second signal to the second communication device.

[0260] In some embodiments of the present application, before the first communication device sends the first information or the first signal to the second communication device, or before the first communication device instructs the third party device to send the first information or the first signal to the second communication device, the method may further include the following steps:

[0261] The first communication device receives capability information of the second communication device;

[0262] Alternatively, before the third communication device sends the first information to the first communication device and the second communication device, the method may further include the following steps:

[0263] The third communication device receives the capability information of the second communication device;

[0264] The capability information includes at least one of the following:

[0265] Carrier generation capability information;

[0266] Frequency deviation capability information;

[0267] Oscillator capability information;

[0268] Amplify capability information;

[0269] Energy storage capacity information;

[0270] Modulation capability information.

[0271] In the embodiment of the present application, before the second communication device receives the first information and the first signal, the capability information of the second communication device may be sent.

[0272] In other words, before the first communication device sends the first information or the first signal to the second communication device, or before the first communication device instructs the third-party device to send the first information or the first signal to the second communication device, the first communication device first receives the capability information of the second communication device, and determines the first information according to the capability information of the second communication device. Optionally, the first communication device can receive the capability information of the second communication device from the second communication device, that is, the second communication device sends the capability information to the first communication device. Optionally, the first communication device can receive the capability information of the second communication device from other devices, that is, the second communication device sends the capability information to other devices, and then sends it to the first communication device through other devices. Other devices are devices other than the first communication device and the second communication device.

[0273] Alternatively, before the third communication device sends the first information to the first communication device and the second communication device, the third communication device first receives the capability information of the second communication device, and determines the first information according to the capability information of the second communication device. Optionally, the third communication device can receive the capability information of the second communication device from the second communication device, that is, the second communication device sends the capability information to the third communication device. Optionally, the third communication device can receive the capability information of the second communication device from the first communication device or other devices, that is, the second communication device sends the capability information to the first communication device or other devices, and then sends it to the third communication device through the first communication device or other devices. Other devices are devices other than the first communication device, the second communication device, and the third communication device.

[0274] Other devices in different embodiments may be the same or different.

[0275] The capability information of the second communication device may include at least one of the following:

[0276] 1) Carrier generation capability information, through which it can be determined whether the second communication device has carrier generation capability. A device with carrier generation capability is an active device, and a device without carrier generation capability is a passive device or a semi-passive device;

[0277] 2) Frequency deviation capability information, such as first level duration, first level switching period, frequency modulation capability of the varactor diode, and other hardware capabilities related to frequency modulation capability;

[0278] 3) Oscillator capability information, such as crystal frequency, clock frequency, oscillator stability, etc., where the crystal frequency is a reference clock source of 100 MHz, the clock frequency is a frequency shift capability of 20 MHz, and the oscillator stability is a frequency error of 100 ppm at a frequency deviation of 20 MHz;

[0279] 4) Amplification capability information, such as whether it has amplification capability, whether it is equipped with a reflection amplifier or a downlink low-noise amplifier, and if it has amplification capability, the amplification factor and adjustable amplification capability;

[0280] 5) Energy storage capacity information, such as whether it has energy storage capacity;

[0281] 6) Modulation capability information, such as whether it supports modulation modes such as amplitude modulation, frequency modulation, phase modulation, and high-order modulation.

[0282] In addition to the above information, other information may also be included, such as storage capacity, number and value of load impedances, constellation point resolution, error vector magnitude (Error Vector Magnitude, EVM) and other information.

[0283] The first communication device may determine the first information based on the capability information of the second communication device, so that the determined first information can better match the capability of the second communication device. For example, since the frequency offset error and modulation delay of the second communication device are random, the first communication device may determine the maximum frequency offset error or the longest delay of the second communication device when configuring the transmission resources.

[0284] In some embodiments of the present application, there are multiple second communication devices, and the first information is used to indicate the transmission resource information and modulation information of each second communication device respectively.

[0285] In an embodiment of the present application, multiple second communication devices can assist in perception in parallel, the first information can indicate the transmission resource information and modulation information of each second communication device respectively, and the transmission resources of different second communication devices indicated by the first information can be orthogonal or non-orthogonal to achieve multiple access of multiple second communication devices. The first communication device can receive the second signals of multiple second communication devices, eliminate non-ideal factors at the transceiver end or eliminate non-ideal factors on the second communication device side, identify the backscatter path, and perform perception measurement.

[0286] Using multiple second communication devices to assist in perception can improve perception performance.

[0287] It should be noted that the third-party devices in different embodiments of the present application may be the same or different.

[0288] The invention scheme of the embodiment of the present application mainly provides possible indication information and transmission process when the backscatter communication equipment participates in perception, eliminates non-ideal factors, and improves the perception performance of the perception target.

[0289] For ease of understanding, the technical solution provided in the embodiments of the present application is described below through specific examples.

[0290] In the following example, the second communication device, i.e., the backscatter communication device, is taken as a tag device tag as an example. It is assumed that the tag is located near the sensing target, that is, the strength of the reflected signal of the sensing target received by the tag is sufficient to assist the sensing target in enhancing perception. The transmission process provided in each example can be based on NR transmission or RFID transmission. Node A and Node B are both communication devices, which can be communication devices such as gNB / UE, or other communication devices different from gNB / UE. The first device is the initiator of the sensing service, such as the fourth communication device.

[0291] Example 1: Tag modulation data in dual-base architecture

[0292] This example considers the process in which the tag modulates the carrier signal sent by node A and transmits it backscattered to node B in a dual-base architecture, such as Fig.17 In this example, node A is the third communication device, and node B is the first communication device.

[0293] 1) Node A sends first information and a first signal, where the first information is used to configure transmission resource information and modulation information for tag backscattering;

[0294] Among them, transmission resource information: time domain or frequency domain resources used for tag backscatter signals to eliminate non-ideal factors introduced by tag side modulation, such as frequency offset error / phase shift;

[0295] The modulation information includes, but is not limited to: a modulation mode (amplitude modulation, phase modulation or frequency modulation), a spreading factor or a modulation rate of the modulation or a backscatter link frequency, where the spreading factor or the modulation rate or the backscatter link frequency is used to improve the perceived SNR or SINR;

[0296] 2) Before 1), node A or node B receives the perception demand information sent by the first device, or node B receives the perception demand information forwarded by node A; or node B receives the perception demand information, and the perception demand information is included in the first information; the first device includes a third-party device, an application server, a core network, etc.;

[0297] 3) The tag modulates the bit data to be transmitted based on the first information and the first signal to generate a backscatter signal, i.e., the second signal. For example, the tag modulates the first signal at the time domain position and frequency domain position indicated by the first information with the indicated modulation mode and modulation rate to generate a backscatter signal; the first signal is the carrier signal sent by node A;

[0298] 4) Node B receives the second signal, estimates and compensates for non-ideal factors at the transceiver end or non-ideal factors at the tag side based on the first information, and then measures the second signal based on the perception demand information.

[0299] Optionally, the node B reports the perception measurement amount to the node A. The perception measurement amount may include but is not limited to:

[0300] Demodulation information of the second signal, such as tag ID, tag spatial coordinates, tag rate, tag perception parameters, etc.;

[0301] The measurement quantity of the perception target that is decoupled from the tag, for example, the spatial coordinates and velocity of the perception target.

[0302] Example 2: Tag full reflection in dual-base architecture

[0303] This example considers the process in which the tag fully reflects the carrier signal and transmits it backscattered to Node B in a dual-base architecture. Fig.18 As shown, Fig.17 The processes shown are similar. In this example, node A is the third communication device, and node B is the first communication device.

[0304] 1) Node A sends first information to tag and node B. The first information includes the following contents:

[0305] Transmission resource information: Time domain or frequency domain resources used for tag backscatter signals to eliminate non-ideal factors introduced by tag-side modulation, such as frequency offset error / phase shift;

[0306] Modulation information: used to indicate the modulation mode of the tag. It is worth noting that the modulation information of the first information in this example only indicates that the tag performs full reflection, and does not include information such as modulation rate / backscatter link frequency / spreading factor. Among them, full reflection means that the tag does not perform modulation corresponding to impedance switching within the time unit of backscattering, and the tag remains in a mismatched state;

[0307] 2) Node B estimates and compensates for the non-ideal factors of the transceiver based on the first information, and measures the backscattered signal based on the total reflection of the tag based on the perceived service demand, that is, the second signal. Due to the total reflection of the tag, the backscattered signal does not contain the frequency offset error and modulation delay error introduced by the modulation on the tag side. Therefore, Node B needs to consider the following perception signal processing flow: elimination of non-ideal factors of Node A and Node B, identification of the backscattered path, and perception measurement.

[0308] Example 3: Tag modulation data in a single-base architecture

[0309] This example considers the relevant process of modulating the tag according to the first signal and backscattering it to the node B under the single base station architecture, such as Fig.19 In this example, node A is a first communication device.

[0310] 1) Node A sends first information and a first signal, where the first information is used to indicate transmission resource information and modulation information of tag backscattering.

[0311] The transmission resources of the tag side backscatter transmission indicated by the first information are used to eliminate non-ideal factors introduced by the tag side modulation, such as frequency offset error / phase offset; the modulation information indicated by the first information includes but is not limited to: modulation mode (amplitude modulation, phase modulation or frequency modulation), modulation spreading factor or modulation rate or backscatter link frequency, wherein the spreading factor or modulation rate or backscatter link frequency is used to improve the perceived SNR or SINR;

[0312] 2) Before 1), node A receives the sensing demand information sent by the first device. The first device includes third-party devices, application servers, core networks, etc. The sensing service information includes but is not limited to: the spatial map, temperature, and humidity of node A within the sensing range; the spatial coordinates of the sensing target within the sensing range, the speed of the sensing target, the state of the sensing target (such as health monitoring), etc.

[0313] 3) The tag generates a backscatter signal, i.e., a second signal, based on the first information and the first signal. For example, the tag modulates the first signal at the time domain position and frequency domain position indicated by the first information with the indicated modulation mode and modulation rate to generate a backscatter signal; the first signal is the carrier signal sent by node A;

[0314] 4) Node A receives the second signal, estimates and compensates for non-ideal factors on the tag side based on the first information, and then measures the second signal based on the perception requirement information to obtain a perception measurement value.

[0315] Perceptual measurements include at least one of the following:

[0316] Demodulation information of the second signal, such as tag ID, tag spatial coordinates, tag rate, tag perception parameters, etc.;

[0317] The measurement quantity of the perception target that is decoupled from the tag, for example, the spatial coordinates and velocity of the perception target.

[0318] The above process considers the scenario where A sends and A receives. Therefore, the sensing requirement information only needs to be indicated to node A, and the sensing measurement is completed by node A. Before sensing measurement, only the non-ideal factors on the tag side need to be eliminated, and the non-ideal factors on the transmitting and receiving sides in Examples 1 and 2 do not need to be considered. When the self-interference is strong, self-interference elimination needs to be considered to improve the sensing measurement performance.

[0319] Example 4: Tag full reflection in a single-base architecture

[0320] This example considers the relevant process of the tag performing full reflection and backscattering transmission to node A in a single-base architecture, such as Fig. 20 In this example, node A is a first communication device.

[0321] 1) Node A sends the first information to the tag. The modulation information of the first information indicates that the tag performs full reflection within the reflection time unit, and does not include information such as modulation rate / backscatter link frequency / spreading factor. Full reflection means that the tag does not perform modulation corresponding to impedance switching within the backscatter time unit, and the tag remains in a mismatched state;

[0322] 2) Node A receives the backscattered signal based on total reflection of the tag, i.e., the second signal, and measures the second signal. Due to the total reflection of the tag, the backscattered signal does not contain the frequency deviation error and modulation delay error introduced by the modulation on the tag side. Due to the total reflection of the tag, the non-ideal factors of the transceiver and the tag side are not considered, but the self-interference problem is relatively serious under the single-base architecture. Node A can consider eliminating self-interference before sensing and measuring.

[0323] Example 5: Multi-tag assisted perception

[0324] This example considers the scenario where tags are decoupled from perception targets, and the transmission process of multiple tags assisting perception in parallel, such as Fig.21 As shown. Assume that N tags have been activated by the network before parallel auxiliary sensing, and the spatial coordinates of the N tags are known. In this example, node A is the third communication device, node B is the first communication device, and taking the dual-base architecture of A sending and B receiving as an example, the possible transmission process is as follows:

[0325] 1) Node A sends first information and a first signal, where the first information is used to indicate transmission resource information and modulation information of tag backscattering.

[0326] Transmission resource information may include resource information in the time domain, frequency domain, code domain, polarization domain, and other dimensions. It has two main purposes: (1) compensating for non-ideal factors introduced by tag-side modulation, such as frequency offset error or phase shift; (2) access of N tags: access by time division multiplexing (TDM), frequency division multiplexing (FDM), code division multiplexing (CDM), or different polarization modes.

[0327] To avoid aliasing of reflected signals of N tags in Node B, before configuring the transmission resources of the first information, optionally, the transmission resources of the N tags are determined in combination with the spatial coordinates of the N tags or information such as RSRP / SNR / SINR / RSSI / RSRQ of the backscattered signals measured by Node A / Node B;

[0328] The modulation information includes, but is not limited to: a modulation mode (amplitude modulation, phase modulation or frequency modulation), a spreading factor or a modulation rate of the modulation or a backscatter link frequency, wherein the spreading factor or the modulation rate or the backscatter link frequency is used to improve the perceived SNR or SINR;

[0329] 2) Before 1), node A or node B receives the perception demand information sent by the first device, or node B receives the perception demand information forwarded by node A. The first device includes third-party devices, application servers, core network devices, etc.; the perception demand information includes but is not limited to: the spatial map, temperature, and humidity of node A or node B within the perception range; the spatial coordinates of the perception target within the perception range, the speed of the perception target, the state of the perception target (such as health monitoring), etc.;

[0330] 3) Node B receives the sensing requirement information, where the sensing requirement information may be included in the first information;

[0331] 4) N ​​tags access the network based on the first information; and based on the first information and the first signal, generate a backscatter signal, i.e., a second signal. For example, N tags modulate the first signal at the time domain position and frequency domain position indicated by the first information with the indicated modulation mode and modulation rate to generate a backscatter signal. The first signal is the carrier signal sent by node A;

[0332] 5) Node B estimates and compensates for non-ideal factors at the transceiver end or non-ideal factors at the tag side based on the first information, and then measures the second signal based on the sensing demand information.

[0333] Optionally, the node B reports the perception measurement amount to the node A.

[0334] The difference from Example 1 is that the first information contains orthogonal resources of N tags to achieve multiple access of N tags. Secondly, Node B receives the backscattered signals of N tags, eliminates non-ideal factors at the transceiver end and the tag side, identifies the backscattered path, and performs perception measurement.

[0335] In addition, the corresponding single-base architecture, tag full reflection and other related processes in the case of multi-tag assisted perception are similar to this and will not be repeated here.

[0336] The embodiments of the present application provide indication information and related transmission processes when a backscatter communication device participates in perception, thereby eliminating non-ideal factors at the transceiver end or non-ideal factors on the backscatter communication device side, so that the perception performance can be enhanced by utilizing the backscatter link of the backscatter communication device.

[0337] It should be noted that, in the embodiment of the present application, the second communication device performing total reflection according to the first signal may include the second communication device performing total reflection according to the first signal and an environmental reflection signal, such as a reflection signal of a perceived target.

[0338] Corresponding to the above method embodiment, the present application embodiment also provides a signal processing method, such as Fig. 22 As shown, the method comprises the following steps:

[0339] S2210: The second communication device receives first information and a first signal, where the first information is used to indicate transmission resource information and modulation information of the second communication device;

[0340] S2220: The second communication device generates a second signal based on the first information and the first signal;

[0341] S2230: The second communication device sends a second signal to the first communication device;

[0342] The modulation information includes at least one of the following:

[0343] Modulation method;

[0344] Spreading factor of the modulation;

[0345] Modulation rate;

[0346] Backscatter link frequency.

[0347] By applying the method provided in the embodiment of the present application, after the second communication device receives the first information and the first signal, it generates a second signal based on the first information and the first signal, and sends the second signal to the first communication device, the first information is used to indicate the transmission resource information and modulation information of the second communication device, the modulation information includes at least one of the modulation mode, the modulation spreading factor, the modulation rate and the backscatter link frequency, the second signal is generated based on the first information and the first signal, the first communication device receives the second signal based on the perception requirement information and the first information, and the perception performance of the perception target can be enhanced through the second signal.

[0348] In some embodiments of the present application, the modulation method includes a total reflection modulation method or a modulation method corresponding to impedance switching.

[0349] In some embodiments of the present application, the second communication device receives the first information and the first signal, including:

[0350] The second communication device receives the first information or the first signal from the first communication device or the third communication device or the third party device.

[0351] In some embodiments of the present application, before the second communication device receives the first information and the first signal, the method further includes:

[0352] The second communication device sends capability information of the second communication device;

[0353] The capability information includes at least one of the following:

[0354] Carrier generation capability information;

[0355] Frequency deviation capability information;

[0356] Oscillator capability information;

[0357] Amplify capability information;

[0358] Energy storage capacity information;

[0359] Modulation capability information.

[0360] The signal processing method provided in the embodiment of the present application can achieve Figures 15 to 21 The various processes implemented by the illustrated method embodiment achieve the same technical effect and will not be described again here to avoid repetition.

[0361] Corresponding to the above method embodiment, the present application embodiment also provides a signal processing method, such as Fig.23 As shown, the method comprises the following steps:

[0362] S2310: The third communication device obtains perception requirement information, where the perception requirement information is used to indicate the perception information required by the initiator of the perception service;

[0363] S2320: The third communication device sends first information to the first communication device and the second communication device, where the first information is used to indicate transmission resource information and modulation information of the second communication device;

[0364] S2330: The third communication device sends a first signal to the second communication device;

[0365] The modulation information includes at least one of the following:

[0366] Modulation method; spreading factor of modulation; modulation rate; backscatter link frequency.

[0367] By applying the method provided in the embodiment of the present application, after the third communication device obtains the perception demand information, it sends the first information to the first communication device and the second communication device, and sends the first signal to the second communication device, the first information is used to indicate the transmission resource information and modulation information of the second communication device, the modulation information includes at least one of the modulation mode, the modulation spreading factor, the modulation rate and the backscatter link frequency, the second communication device generates a second signal based on the first information and the first signal, and sends it to the first communication device, the first communication device receives the second signal based on the perception demand information and the first information, and the perception performance of the perception target can be enhanced through the second signal.

[0368] In some embodiments of the present application, the modulation method includes a total reflection modulation method or a modulation method corresponding to impedance switching.

[0369] In some embodiments of the present application, the third communication device obtains the perception requirement information, including:

[0370] The third communication device receives the sensing requirement information from the first communication device or the fourth communication device.

[0371] In some embodiments of the present application, the perception requirement information includes environmental information within the perception range or feature information of a perception target within the perception range.

[0372] In some embodiments of the present application, the method further comprises:

[0373] The third communications device receives the perception measurement from the first communications device.

[0374] In some embodiments of the present application, the perception measurement amount includes demodulation information of the second signal or a measurement amount of a perception target associated with the second communication device.

[0375] In some embodiments of the present application, before the third communication device sends the first information to the first communication device and the second communication device, the method further includes:

[0376] The third communication device receives the capability information of the second communication device;

[0377] The capability information includes at least one of the following:

[0378] Carrier generation capability information; frequency deviation capability information; oscillator capability information; amplification capability information; energy storage capability information; modulation capability information.

[0379] In some embodiments of the present application, there are multiple second communication devices, and the first information is used to indicate the transmission resource information and modulation information of each second communication device respectively.

[0380] The signal processing method provided in the embodiment of the present application can achieve Figures 15 to 22 The various processes implemented by the illustrated method embodiment achieve the same technical effect and will not be described again here to avoid repetition.

[0381] The signal processing method provided in the embodiment of the present application can be executed by a signal processing device. In the embodiment of the present application, the signal processing device provided in the embodiment of the present application is described by taking the signal processing device executing the signal processing method as an example.

[0382] like Fig.24 As shown, the signal processing device 2400 may include the following modules:

[0383] A first obtaining module 2410 is used to obtain perception requirement information and first information, where the perception requirement information is used to indicate the perception information required by the perception service initiator, and the first information is used to indicate the transmission resource information and modulation information of the second communication device;

[0384] The first receiving module 2420 is configured to receive, from the second communication device, a second signal generated based on the first information and the first signal, based on the sensing demand information and the first information;

[0385] The modulation information includes at least one of the following:

[0386] Modulation method; spreading factor of modulation; modulation rate; backscatter link frequency.

[0387] By applying the device provided in the embodiment of the present application, after obtaining perception demand information and first information, a second signal generated based on the first information and the first signal is received from the second communication device based on the perception demand information and the first information, wherein the perception demand information is used to indicate the perception information required by the initiator of the perception service, and the first information is used to indicate the transmission resource information and modulation information of the second communication device, and the modulation information includes at least one of a modulation mode, a modulation spreading factor, a modulation rate, and a backscatter link frequency. The second signal is generated based on the first information and the first signal, and the second signal is received based on the perception demand information and the first information. The perception performance of the perception target can be enhanced through the second signal.

[0388] In some embodiments of the present application, the modulation method includes a total reflection modulation method or a modulation method corresponding to impedance switching.

[0389] In some embodiments of the present application, the first obtaining module 2410 is configured to perform one of the following:

[0390] receiving the sensing demand information from the third communication device or the fourth communication device, and receiving the first information from the third communication device or the third-party device;

[0391] The first information is determined, and the perception demand information is received from the fourth communication device.

[0392] In some embodiments of the present application, the perception requirement information includes environmental information within the perception range or feature information of a perception target within the perception range.

[0393] In some embodiments of the present application, the first receiving module 2420 is used to:

[0394] A second signal generated based on the first information and the first signal and sent by the second communication device is measured to obtain a perception measurement value.

[0395] In some embodiments of the present application, the signal processing device 2400 further includes a reporting module, which is used to:

[0396] After obtaining the perception measurement amount, the perception measurement amount is reported.

[0397] In some embodiments of the present application, the perception measurement amount includes demodulation information of the second signal or a measurement amount of a perception target associated with the second communication device.

[0398] In some embodiments of the present application, the signal processing device 2400 further includes a elimination module, which is used to:

[0399] Before receiving a second signal generated based on the first information and the first signal from the second communication device, non-ideal factors are eliminated based on the first information and the second signal sent by the second communication device.

[0400] In some embodiments of the present application, the elimination module is further used to:

[0401] After eliminating non-ideal factors and before receiving a second signal generated based on the first information and the first signal from a second communication device, interference cancellation is performed based on the first information, the second signal and a third signal, where the third signal includes a direct link signal or a self-interference signal.

[0402] In some embodiments of the present application, the signal processing apparatus further includes a first sending module, configured to perform one of the following before receiving a second signal generated based on the first information and the first signal from the second communication device:

[0403] Sending first information or a first signal to a second communication device;

[0404] The third party device is instructed to send first information or a first signal to the second communication device.

[0405] In some embodiments of the present application, the signal processing device 2400 further includes a second receiving module, which is used to:

[0406] Before sending the first information or the first signal to the second communication device, or before instructing the third-party device to send the first information or the first signal to the second communication device, receiving the capability information of the second communication device;

[0407] The capability information includes at least one of the following:

[0408] Carrier generation capability information; frequency deviation capability information; oscillator capability information; amplification capability information; energy storage capability information; modulation capability information.

[0409] In some embodiments of the present application, there are multiple second communication devices, and the first information is used to indicate the transmission resource information and modulation information of each second communication device respectively.

[0410] The signal processing device 2400 provided in the embodiment of the present application can realize Figures 15 to 21 The various processes implemented by the illustrated method embodiment achieve the same technical effect and will not be described again here to avoid repetition.

[0411] like Fig.25 As shown, the signal processing device 2500 may include the following modules:

[0412] The third receiving module 2510 is used to receive first information and a first signal, where the first information is used to indicate transmission resource information and modulation information of a second communication device;

[0413] A generating module 2520, configured to generate a second signal based on the first information and the first signal;

[0414] The second sending module 2530 is used to send a second signal to the first communication device;

[0415] The modulation information includes at least one of the following:

[0416] Modulation method; spreading factor of modulation; modulation rate; backscatter link frequency.

[0417] By using the device provided in the embodiment of the present application, after receiving the first information and the first signal, a second signal is generated based on the first information and the first signal, and the second signal is sent to the first communication device, the first information is used to indicate the transmission resource information and modulation information of the second communication device, the modulation information includes at least one of the modulation mode, the modulation spreading factor, the modulation rate and the backscatter link frequency, the second signal is generated based on the first information and the first signal, the first communication device receives the second signal based on the perception requirement information and the first information, and the perception performance of the perception target can be enhanced through the second signal.

[0418] In some embodiments of the present application, the modulation method includes a total reflection modulation method or a modulation method corresponding to impedance switching.

[0419] In some embodiments of the present application, the third receiving module 2510 is used to:

[0420] A first information or a first signal is received from a first communication device or a third communication device or a third party device.

[0421] In some embodiments of the present application, the second sending module 2530 is further used to:

[0422] Before receiving the first information and the first signal, sending capability information of the second communication device;

[0423] The capability information includes at least one of the following:

[0424] Carrier generation capability information; frequency deviation capability information; oscillator capability information; amplification capability information; energy storage capability information; modulation capability information.

[0425] The signal processing device 2500 provided in the embodiment of the present application can realize Figures 16 to 22 The various processes implemented by the illustrated method embodiment achieve the same technical effect and will not be described again here to avoid repetition.

[0426] like Fig.26 As shown, the signal processing device 2600 may include the following modules:

[0427] The second obtaining module 2610 is used to obtain the perception requirement information, where the perception requirement information is used to indicate the perception information required by the initiator of the perception service;

[0428] The third sending module 2620 is used to send first information to the first communication device and the second communication device, where the first information is used to indicate transmission resource information and modulation information of the second communication device;

[0429] The fourth sending module 2630 is configured to send a first signal to a second communication device;

[0430] The modulation information includes at least one of the following:

[0431] Modulation method; spreading factor of modulation; modulation rate; backscatter link frequency.

[0432] By applying the device provided in the embodiment of the present application, after obtaining the perception demand information, the first information is sent to the first communication device and the second communication device, and the first signal is sent to the second communication device, the first information is used to indicate the transmission resource information and modulation information of the second communication device, the modulation information includes at least one of the modulation mode, the modulation spreading factor, the modulation rate and the backscatter link frequency, the second communication device generates a second signal based on the first information and the first signal, and sends it to the first communication device, the first communication device receives the second signal based on the perception demand information and the first information, and the perception performance of the perception target can be enhanced through the second signal.

[0433] In some embodiments of the present application, the modulation method includes a total reflection modulation method or a modulation method corresponding to impedance switching.

[0434] In some embodiments of the present application, the second obtaining module 2610 is used to:

[0435] The sensing requirement information is received from the first communication device or the fourth communication device.

[0436] In some embodiments of the present application, the perception requirement information includes environmental information within the perception range or feature information of a perception target within the perception range.

[0437] In some embodiments of the present application, the signal processing device 2600 further includes a fourth receiving module, configured to:

[0438] A perception measurement is received from a first communications device.

[0439] In some embodiments of the present application, the perception measurement amount includes demodulation information of the second signal or a measurement amount of a perception target associated with the second communication device.

[0440] In some embodiments of the present application, the signal processing device 2600 further includes a fifth receiving module, which is used to:

[0441] Before sending the first information to the first communication device and the second communication device, receiving capability information of the second communication device;

[0442] The capability information includes at least one of the following:

[0443] Carrier generation capability information; frequency deviation capability information; oscillator capability information; amplification capability information; energy storage capability information; modulation capability information.

[0444] In some embodiments of the present application, there are multiple second communication devices, and the first information is used to indicate the transmission resource information and modulation information of each second communication device respectively.

[0445] The signal processing device 2600 provided in the embodiment of the present application can realize Figures 16 to 21 , Fig.23 The various processes implemented by the illustrated method embodiment achieve the same technical effect and will not be described again here to avoid repetition.

[0446] like Fig. 27 As shown, the embodiment of the present application further provides a communication device 2700, including a processor 2701 and a memory 2702, the memory 2702 stores a program or instruction that can be run on the processor 2701, for example, when the communication device 2700 is a first communication device, the program or instruction is executed by the processor 2701 to implement the above Figures 15 to 21 When the communication device 2700 is a second communication device, the program or instruction is executed by the processor 2701 to implement the above Figures 16 to 22 When the communication device 2700 is a third communication device, the program or instruction is executed by the processor 2701 to implement the above Figures 16 to 21 , Fig.23 To avoid repetition, the steps of the method embodiment are not described here.

[0447] The embodiment of the present application also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the following Figures 15 to 22 The steps in the method embodiment shown. This terminal embodiment corresponds to the above-mentioned first communication device or second communication device side method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to this terminal embodiment and can achieve the same technical effect. Specifically, Fig.28 A schematic diagram of the structure of a terminal for implementing an embodiment of the present application.

[0448] The terminal 2800 includes but is not limited to: a radio frequency unit 2801, a network module 2802, an audio output unit 2803, an input unit 2804, a sensor 2805, a display unit 2806, a user input unit 2807, an interface unit 2808, a memory 2809 and at least some of the components of the processor 2810.

[0449] Those skilled in the art will appreciate that the terminal 2800 may also include a power source (such as a battery) for supplying power to each component, and the power source may be logically connected to the processor 2810 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Fig.28 The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0450] It should be understood that in the embodiment of the present application, the input unit 2804 may include a graphics processing unit (GPU) 28041 and a microphone 28042, and the graphics processor 28041 processes the image data of the static picture or video obtained by the image capture device (such as a camera) in the video capture mode or the image capture mode. The display unit 2806 may include a display panel 28061, and the display panel 28061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 2807 includes a touch panel 28071 and at least one of other input devices 28072. The touch panel 28071 is also called a touch screen. The touch panel 28071 may include two parts: a touch detection device and a touch controller. Other input devices 28072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0451] In the embodiment of the present application, after receiving downlink data from the network side device, the radio frequency unit 2801 can transmit the data to the processor 2810 for processing; in addition, the radio frequency unit 2801 can send uplink data to the network side device. Generally, the radio frequency unit 2801 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0452] The memory 2809 can be used to store software programs or instructions and various data. The memory 2809 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 2809 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 2809 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0453] The processor 2810 may include one or more processing units; optionally, the processor 2810 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 2810.

[0454] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to Figures 15 to 22 The relevant descriptions of the method embodiments shown in the figure achieve the same or corresponding technical effects, and will not be repeated here to avoid repetition.

[0455] The embodiment of the present application also provides a network side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the following Figures 15 to 21 , Fig.23 The steps of the method embodiment shown. The network side device embodiment corresponds to the first communication device or the third communication device side method embodiment described above, and each implementation process and implementation method of the above method embodiment can be applied to the network side device embodiment and can achieve the same technical effect.

[0456] Specifically, the embodiment of the present application also provides a network side device. Fig.29 As shown, the network side device 2900 includes: an antenna 2901, a radio frequency device 2902, a baseband device 2903, a processor 2904 and a memory 2905. The antenna 2901 is connected to the radio frequency device 2902. In the uplink direction, the radio frequency device 2902 receives information through the antenna 2901 and sends the received information to the baseband device 2903 for processing. In the downlink direction, the baseband device 2903 processes the information to be sent and sends it to the radio frequency device 2902. The radio frequency device 2902 processes the received information and sends it out through the antenna 2901.

[0457] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 2903, which includes a baseband processor.

[0458] The baseband device 2903 may include, for example, at least one baseband board on which a plurality of chips are arranged. Fig.29 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 2905 through a bus interface to call the program in the memory 2905 to execute the network side device operations shown in the above method embodiment.

[0459] The network side device may further include a network interface 2906, which is, for example, a Common Public Radio Interface (CPRI).

[0460] Specifically, the network side device 2900 of the embodiment of the present invention further includes: instructions or programs stored in the memory 2905 and executable on the processor 2904, and the processor 2904 calls the instructions or programs in the memory 2905 to execute Fig.24 or Fig.26 The methods executed by the modules shown achieve the same technical effects, and therefore will not be described here in detail to avoid repetition.

[0461] The embodiment of the present application also provides a readable storage medium on which a program or instruction is stored. When the program or instruction is executed by a processor, the above Figures 15 to 23 The various processes of the method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0462] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0463] The present application also provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the above Figures 15 to 23 The various processes of the method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0464] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0465] The present application embodiment further provides a computer program / program product, wherein the computer program / program product is stored in a storage medium, and the computer program / program product is executed by at least one processor to implement the above Figures 15 to 23 The various processes of the method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0466] The embodiment of the present application also provides a wireless communication system, including: a first communication device and a second communication device, the first communication device can be used to perform the above Fig.15 The steps of the method embodiment shown in the figure, the second communication device can be used to perform the above Fig. 22 Steps of the method embodiment are shown.

[0467] The embodiment of the present application also provides a wireless communication system, including: a first communication device, a second communication device and a third communication device, wherein the first communication device can be used to perform the above Fig.15 The steps of the method embodiment shown in the figure, the second communication device can be used to perform the above Fig. 22 The steps of the method embodiment shown in the figure, the third communication device can be used to perform the above Fig.23 Steps of the method embodiment are shown.

[0468] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0469] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, disk, CD, etc.), including several instructions to enable a terminal or a network-side device to execute the methods described in each embodiment of the present application.

[0470] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of the present application and the scope of protection of the claims, and these implementation methods are all within the protection of the present application.

Claims

1. A signal processing method, It is characterized in that include: The first communication device obtains perception requirement information and first information, where the perception requirement information is used to indicate the perception information required by the perception service initiator, and the first information is used to indicate the transmission resource information and modulation information of the second communication device; The first communication device receives, based on the perception demand information and the first information, a second signal generated based on the first information and the first signal from the second communication device; The modulation information includes at least one of the following: Modulation method; Spreading factor of the modulation; Modulation rate; Backscatter link frequency.

2. The method according to claim 1, It is characterized in that The modulation mode includes a total reflection modulation mode or a modulation mode corresponding to impedance switching.

3. The method according to claim 1 or 2, It is characterized in that The first communication device obtains the perception requirement information and the first information, including one of the following: The first communication device receives the perceived demand information from a third communication device or a fourth communication device, and receives the first information from the third communication device or a third-party device; The first communication device determines the first information and receives the perceived need information from a fourth communication device.

4. The method according to any one of claims 1 to 3, It is characterized in that The perception requirement information includes environmental information within the perception range or feature information of a perception target within the perception range.

5. The method according to any one of claims 1 to 4, It is characterized in that The first communication device receives, from the second communication device, a second signal generated based on the first information and the first signal, including: The first communication device measures a second signal generated based on the first information and the first signal and sent by the second communication device to obtain a perception measurement value.

6. The method according to claim 5, It is characterized in that After the first communication device obtains the perception measurement amount, the method further includes: The first communication device reports the perception measurement value.

7. The method according to claim 5 or 6, It is characterized in that The perception measurement amount includes demodulation information of the second signal or a measurement amount of a perception target associated with the second communication device.

8. The method according to any one of claims 5 to 7, It is characterized in that Before the first communication device measures a second signal sent by the second communication device and generated based on the first information and the first signal, the method further includes: The first communication device eliminates non-ideal factors based on the first information and the second signal sent by the second communication device.

9. The method according to claim 8, It is characterized in that After the first communication device eliminates non-ideal factors and before the first communication device measures a second signal generated based on the first information and the first signal and sent by the second communication device, the method further includes: The first communication device performs interference cancellation based on the first information, the second signal and a third signal, where the third signal includes a direct link signal or a self-interference signal.

10. The method according to any one of claims 1 to 9, It is characterized in that Before the first communication device receives a second signal generated based on the first information and the first signal from the second communication device, the method further includes one of the following: The first communication device sends the first information or the first signal to the second communication device; The first communication device instructs a third-party device to send the first information or the first signal to the second communication device.

11. The method according to claim 10, It is characterized in that Before the first communication device sends the first information or the first signal to the second communication device, or before the first communication device instructs a third-party device to send the first information or the first signal to the second communication device, the method further includes: The first communication device receives capability information of the second communication device; The capability information includes at least one of the following: Carrier generation capability information; Frequency deviation capability information; Oscillator capability information; Amplify capability information; Energy storage capacity information; Modulation capability information.

12. The method according to any one of claims 1 to 11, It is characterized in that There are multiple second communication devices, and the first information is used to indicate the transmission resource information and modulation information of each second communication device respectively.

13. A signal processing method, It is characterized in that include: The second communication device receives first information and a first signal, where the first information is used to indicate transmission resource information and modulation information of the second communication device; The second communication device generates a second signal based on the first information and the first signal; The second communication device sends the second signal to the first communication device; The modulation information includes at least one of the following: Modulation method; Spreading factor of the modulation; Modulation rate; Backscatter link frequency.

14. The method according to claim 13, It is characterized in that The modulation mode includes a total reflection modulation mode or a modulation mode corresponding to impedance switching.

15. The method according to claim 13 or 14, It is characterized in that The second communication device receives the first information and the first signal, including: The second communication device receives the first information or the first signal from the first communication device or a third communication device or a third-party device.

16. The method according to any one of claims 13 to 15, It is characterized in that Before the second communication device receives the first information and the first signal, the method further includes: The second communication device sends capability information of the second communication device; The capability information includes at least one of the following: Carrier generation capability information; Frequency deviation capability information; Oscillator capability information; Amplify capability information; Energy storage capacity information; Modulation capability information.

17. A signal processing method, It is characterized in that include: The third communication device obtains the perception requirement information, where the perception requirement information is used to indicate the perception information required by the initiator of the perception service; The third communication device sends first information to the first communication device and the second communication device, where the first information is used to indicate transmission resource information and modulation information of the second communication device; The third communication device sends a first signal to the second communication device; The modulation information includes at least one of the following: Modulation method; Spreading factor of the modulation; Modulation rate; Backscatter link frequency.

18. The method according to claim 17, It is characterized in that The modulation mode includes a total reflection modulation mode or a modulation mode corresponding to impedance switching.

19. The method according to claim 17 or 18, It is characterized in that The third communication device obtains the perception requirement information, including: The third communication device receives the perceived demand information from the first communication device or the fourth communication device.

20. The method according to any one of claims 17 to 19, It is characterized in that The perception requirement information includes environmental information within the perception range or feature information of a perception target within the perception range.

21. The method according to any one of claims 17 to 20, It is characterized in that The method further comprises: The third communications device receives a perception measurement from the first communications device.

22. The method according to claim 21, It is characterized in that The perception measurement amount includes demodulation information of the second signal or a measurement amount of a perception target associated with the second communication device.

23. The method according to any one of claims 17 to 22, It is characterized in that Before the third communication device sends the first information to the first communication device and the second communication device, the method further includes: The third communication device receives capability information of the second communication device; The capability information includes at least one of the following: Carrier generation capability information; Frequency deviation capability information; Oscillator capability information; Amplify capability information; Energy storage capacity information; Modulation capability information.

24. The method according to any one of claims 17 to 23, It is characterized in that There are multiple second communication devices, and the first information is used to indicate the transmission resource information and modulation information of each second communication device respectively.

25. A signal processing device, It is characterized in that include: A first obtaining module, configured to obtain perception requirement information and first information, wherein the perception requirement information is used to indicate the perception information required by the perception service initiator, and the first information is used to indicate the transmission resource information and modulation information of the second communication device; A first receiving module, configured to receive, from the second communication device, a second signal generated based on the first information and the first signal, based on the perception demand information and the first information; The modulation information includes at least one of the following: Modulation method; The spreading factor of the modulation; Modulation rate; Backscatter link frequency.

26. A signal processing device, It is characterized in that include: A third receiving module, configured to receive first information and a first signal, wherein the first information is used to indicate transmission resource information and modulation information of the second communication device; A generating module, configured to generate a second signal based on the first information and the first signal; A second sending module, configured to send the second signal to the first communication device; The modulation information includes at least one of the following: Modulation method; The spreading factor of the modulation; Modulation rate; Backscatter link frequency.

27. A signal processing device, It is characterized in that include: A second obtaining module is used to obtain perception requirement information, where the perception requirement information is used to indicate the perception information required by the initiator of the perception service; A third sending module, used to send first information to the first communication device and the second communication device, where the first information is used to indicate transmission resource information and modulation information of the second communication device; A fourth sending module, configured to send a first signal to the second communication device; The modulation information includes at least one of the following: Modulation method; Spreading factor of the modulation; Modulation rate; Backscatter link frequency.

28. A communication device, It is characterized in that It includes a processor and a memory, the memory storing a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, it implements the steps of the signal processing method as described in any one of claims 1 to 12, or implements the steps of the signal processing method as described in any one of claims 13 to 16, or implements the steps of the signal processing method as described in any one of claims 17 to 24.

29. A readable storage medium, It is characterized in that The readable storage medium stores programs or instructions, and when the programs or instructions are executed by the processor, they implement the steps of the signal processing method as described in any one of claims 1 to 12, or implement the steps of the signal processing method as described in any one of claims 13 to 16, or implement the steps of the signal processing method as described in any one of claims 17 to 24.

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