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 receives a first signal and a second signal from response equipment; the first communication device demodulates or measures the first signal and the second signal according to the first information and the second information; the first information is used for indicating signal transmission related information, and the second information comprises information of a signal processing period or information of a signal processing window.

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] In the ultra-low power communication system, a low-cost and low-power device is a backscatter communication (BSC) device, which generally includes a passive device or a semi-passive device, which can use the radio frequency signals in other devices or the environment to modulate the signal to transmit its own information. Another low-cost and low-power device is an active device, which can generate a carrier signal by itself. In addition, the active device may be able to modulate the radio frequency signals in other devices or the environment like a passive device or a semi-passive device. 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] In the backscatter communication system, positioning can be achieved through the Phase Difference of Arrival (PDOA). Furthermore, if the Time Domain Phase Difference of Arrival (TD-PDOA) is considered, speed measurement can be achieved. When measuring speed through the TD-PDOA method, it is necessary to measure the phase of the same-frequency carrier in time-sharing to obtain the phase difference for speed measurement. This solution has problems such as phase rotation and phase discontinuity. To avoid these problems, it is possible to consider applying the traditional Doppler frequency deviation speed measurement method to the backscatter communication system in combination with the characteristics of the double-sideband signal generated when the backscatter communication equipment is modulated. However, there is currently no clear solution for how to effectively demodulate or measure signals when applying the traditional Doppler frequency deviation-based speed measurement method in the backscatter communication system. Summary of the invention

[0004] The embodiments of the present application provide a signal processing method, apparatus, communication device, and storage medium to effectively perform signal demodulation or measurement.

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

[0006] The first communication device receives the first signal and the second signal from the answering device;

[0007] The first communication device demodulates or measures the first signal and the second signal according to the first information and the second information;

[0008] The first signal is an upper sideband signal of a backscattered signal generated by modulation of a first carrier signal, and the second signal is a lower sideband signal of the backscattered signal;

[0009] Or, the first signal is a signal generated by modulating a second carrier signal generated by the answering device, the second signal is a signal generated by modulating a third carrier signal generated by the answering device, and the first signal and the second signal are sent simultaneously;

[0010] The first information is used to indicate information related to signal transmission, and the second information includes information about a signal processing cycle or information about a signal processing window.

[0011] In a second aspect, a signal processing method is provided, comprising:

[0012] The second communication device sends first information to the answering device, where the first information is used to indicate signal transmission related information;

[0013] The second communication device sends the first information or the second information to the first communication device, where the second information includes information about a signal processing cycle or information about a signal processing window.

[0014] In a third aspect, a signal processing method is provided, comprising:

[0015] The answering device receives the first information;

[0016] The answering device generates a first signal and a second signal according to the first information;

[0017] The answering device sends the first signal and the second signal to the first communication device simultaneously;

[0018] The first signal is an upper sideband signal of a backscattered signal generated by modulation of a first carrier signal, and the second signal is a lower sideband signal of the backscattered signal;

[0019] Or, the first signal is a signal generated by modulating a second carrier signal generated by the answering device, and the second signal is a signal generated by modulating a third carrier signal generated by the answering device;

[0020] The first information is used to indicate signal transmission related information.

[0021] In a fourth aspect, a signal processing device is provided, comprising:

[0022] A first receiving module, configured to receive a first signal and a second signal from a response device;

[0023] A processing module, configured to demodulate or measure the first signal and the second signal according to the first information and the second information;

[0024] The first signal is an upper sideband signal of a backscattered signal generated by modulation of a first carrier signal, and the second signal is a lower sideband signal of the backscattered signal;

[0025] Or, the first signal is a signal generated by modulating a second carrier signal generated by the answering device, the second signal is a signal generated by modulating a third carrier signal generated by the answering device, and the first signal and the second signal are sent simultaneously;

[0026] The first information is used to indicate information related to signal transmission, and the second information includes information about a signal processing cycle or information about a signal processing window.

[0027] In a fifth aspect, a signal processing device is provided, comprising:

[0028] A first sending module, configured to send first information to the answering device, wherein the first information is used to indicate signal transmission related information;

[0029] The second sending module is used to send the first information or the second information to the first communication device, where the second information includes information about a signal processing cycle or information about a signal processing window.

[0030] In a sixth aspect, a signal processing device is provided, including:

[0031] A third receiving module, used for receiving first information;

[0032] A generating module, configured to generate a first signal and a second signal according to the first information;

[0033] A third sending module, configured to send the first signal and the second signal to a first communication device simultaneously;

[0034] The first signal is an upper sideband signal of a backscattered signal generated by modulation of a first carrier signal, and the second signal is a lower sideband signal of the backscattered signal;

[0035] Or, the first signal is a signal generated by modulating a second carrier signal generated by the answering device, and the second signal is a signal generated by modulating a third carrier signal generated by the answering device;

[0036] The first information is used to indicate signal transmission related information.

[0037] In the seventh aspect, a communication device is provided, which includes a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and the program or instruction implements the steps of the method described in the first aspect when executed by the processor of the first communication device, or implements the steps of the method described in the second aspect when executed by the processor of the second communication device, or implements the steps of the method described in the third aspect when executed by the processor of the answering device.

[0038] 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.

[0039] 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 of a first communication device, the steps of the method described in the first aspect are implemented; when the program or instruction is executed by a processor of a second communication device, the steps of the method described in the second aspect are implemented; or when the program or instruction is executed by a processor of an answering device, the steps of the method described in the third aspect are implemented.

[0040] In the tenth aspect, a wireless communication system is provided, comprising: a first communication device or a second communication device, and a response 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 response device can be used to execute the steps of the method described in the third aspect.

[0041] In the eleventh 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.

[0042] In the twelfth 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 a processor of a first communication device to implement the steps of the method as described in the first aspect, or is executed by a processor of a second communication device to implement the steps of the method as described in the second aspect, or is executed by a processor of an answering device to implement the steps of the method as described in the third aspect.

[0043] In an embodiment of the present application, after the first communication device receives the first signal and the second signal from the answering device, the first communication device demodulates or measures the first signal and the second signal according to the first information and the second information, the first information is used to indicate information related to signal transmission, and the second information includes information about the signal processing cycle or information about the signal processing window. Based on the first information and the second information, effective demodulation or measurement of the first signal and the second signal can be achieved, which helps to improve measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A block diagram of a wireless communication system applicable to the embodiments of the present application;

[0045] Figure 2 It is a structural schematic diagram of a response device in the related art;

[0046] Figure 3 It is a structural schematic diagram of a reading and writing device in the related art;

[0047] Figure 4 A schematic diagram of a backscatter communication modulation principle in the related art;

[0048] Figure 5 A schematic diagram of the relationship between a reading and writing device and a response device in the related art;

[0049] Figure 6 A schematic diagram of a network architecture of a single-base backscatter communication system in the related art;

[0050] Figure 7 A schematic diagram of a network architecture of a dual-base backscatter communication system in the related art;

[0051] Figure 8 It is a schematic diagram of a radial velocity measurement method of a transponder device in the related art;

[0052] Fig. 9 This is a flowchart of a signal processing method in an embodiment of the present application;

[0053] Fig.10 This is a schematic diagram of signal modulation in an embodiment of the present application;

[0054] Fig.11 is a flowchart of another signal processing method in an embodiment of the present application;

[0055] Fig.12 is a flowchart of another signal processing method in an embodiment of the present application;

[0056] Fig.13 In the embodiments of this application Fig. 9 A schematic structural diagram of a corresponding signal processing device;

[0057] Fig.14 In the embodiments of this application Fig.11 A schematic structural diagram of a corresponding signal processing device;

[0058] Fig.15 In the embodiments of this application Fig.12 A schematic structural diagram of a corresponding signal processing device;

[0059] Fig.16 This is a schematic diagram of the structure of a communication device in an embodiment of the present application;

[0060] Fig.17 This is a schematic diagram of the hardware structure of a terminal in an embodiment of the present application;

[0061] Fig.18 This is a schematic diagram of the hardware structure of a network-side device in an embodiment of the present application. DETAILED DESCRIPTION

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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, a Transmission Reception Point (TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiments 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.

[0067] 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.

[0068] 1. Application scenarios of the embodiments of the present application

[0069] 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.

[0070] 2. Backscatter Communication and Extremely Low Power Communication

[0071] In a wireless radio frequency identification system, a transponder 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.

[0072] Types of answering machines include the following:

[0073] One is a passive transponder, such as a tag device belonging to a passive Internet of Things (IoT) device (Passive-IoT). This type of transponder does not have energy storage capacitors or 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.

[0074] The other is a semi-passive answering device, which has energy storage capacitors or batteries and relies on non-RF signals to store energy. Optionally, this type of answering 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 other devices.

[0075] Another type is an active transponder device, such as an active tag device. This type of transponder device has the ability to actively send, is equipped with a storage capacitor or a storage battery, relies on non-RF signals for power supply, and can send information to a base station or a reader / writer device without relying on the reflection of the incident signal. It has the ability to generate carrier waves and consumes the most power.

[0076] Backscatter communication is widely used in RFID systems. In a backscatter communication system, the transponder can be called a backscatter communication device, which generally includes a passive transponder or a semi-passive transponder, and can use the radio frequency signals in other devices or the environment to modulate the signal to transmit its own information. That is, the backscatter communication device is a device that modulates and reflects based on the downlink radio frequency signal. For an active transponder, it can generate a carrier signal by itself and modulate the information based on the carrier signal generated by itself, or it can modulate using the radio frequency signals in other devices or the environment like a passive transponder or a semi-passive transponder.

[0077] like Figure 2 The figure is a schematic diagram of the structure of an answering device, and its basic components and main functions include:

[0078] Antenna unit: used to receive incident RF signals and control commands, and also used to send modulated backscatter signals.

[0079] Energy harvester module or battery module: used for the answering device 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 supply module. In this case, the answering device is a semi-passive answering device. The energy harvester module or battery power supply module supplies power to all other modules in the device;

[0080] Micro-controller: used to control baseband signal processing, energy storage or data scheduling status, switch switching, system synchronization, etc.

[0081] Information Receiver module: used to demodulate control commands or data sent by read / write devices or other network nodes;

[0082] 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;

[0083] Memory or sensing module: used to store device ID information, location information, sensor data, etc.

[0084] In addition to the above basic building blocks, the answering 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 answering device.

[0085] Figure 3 The following is a schematic diagram of the structure of a 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:

[0086] Antenna unit: used to receive modulated backscatter signals (Modulation backscatter signals).

[0087] Backscatter signal detection module: used to detect the backscatter signal sent by the answering device, 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.

[0088] Demodulation & Decoder module: used to decode the detected signal to restore the original information stream (Original data).

[0089] Figure 4 The figure shows the modulation principle of backscatter communication. The transponder 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. The reflection coefficient of the signal can be represented as:

[0090]

[0091] Among them, Z 0 is the antenna characteristic impedance, Z 1 is the load impedance. Assume that the input RF 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. The controller can control the reflection coefficient according to the following relationship:

[0092] The symbol 0 corresponds to an impedance of 0;

[0093] Symbol 1 corresponds to impedance 1;

[0094] Symbol 2 corresponds to impedance 2;

[0095] …

[0096] The symbol n corresponds to impedance n.

[0097] 3. Information transmission between RFID reading and writing devices, such as gNB / reader and transponder devices, such as tags

[0098] like Figure 5 As shown, the read / write device can send signaling such as selection (Select), inventory (Inventory) and access (Access) to the answering device, and the status of the answering device side can include ready (Ready), arbitration (Arbitrate), reply (Reply), response (Acknowledged), open (Open), secure (Secured), stopped (killed), etc.

[0099] In the inventory mode, the read / write device selects the answering device, sends a query command (Query), and the answering device responds (Relay), 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 answering device through the confirmation response command (ACK). The answering device sends the relevant data to the read / write device, such as the protocol control word (PC) / extended protocol control word (XPC), electronic product code (EPC), data packet cyclic redundancy check (CRC) (PacketCRC), etc. If the EPC is valid, the read / write device can send a repeated query command (QueryRep) 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 answering device is a single answering device response process.

[0100] 4. Different Backscatter Communication System Architectures

[0101] Figure 6The figure shows a schematic diagram of the network architecture of a monostation backscatter communication system (MBCS). The traditional RFID system is a typical MBCS architecture. MBCS includes a reading and writing device and a transponding device, wherein the transponding device is such as a tag device and the reading and writing device is such as a reader. The reading and writing device includes an RF source and a backscatter communication receiving end, wherein the RF source is used to generate an RF signal to power the transponding device, and the transponding device backscatters the modulated RF signal, and the backscatter communication receiving end in the reading and writing device receives the backscatter signal and then performs signal demodulation. Since the RF source and the backscatter communication receiving end are in the same device, such as the reading and writing device here, the corresponding system is called a monostation backscatter communication system. In addition, in MBCS, since the RF signal will undergo a double near-far effect due to the signal attenuation of the round-trip signal, resulting in a large signal energy attenuation, MBCS is generally used for short-distance backscatter communication, such as traditional RFID applications.

[0102] Different from MBCS, the RF source and the backscatter communication receiver in the bistation backscatter communication system (BBCS) are separate and not in the same device. Figure 7 As shown. Therefore, BBCS avoids the problem of large round-trip signal attenuation. In addition, the performance of BBCS can be further improved by properly placing the RF source. It is worth noting that the ambient backscatter communication system (ABCS) is a type of dual-base backscatter communication system. However, unlike the dedicated signal RF source in BBCS, the RF source in ABCS can be an available RF source in the environment, such as TV towers, cellular base stations, WiFi signals, Bluetooth signals, etc.

[0103] 5. Non-ideal factors of backscatter communication system

[0104] In the backscatter communication positioning application, different application scenarios have different positioning accuracy requirements. For example, in an industrial warehouse, the positioning area of ​​the asset is located and the material information is updated in real time, and the positioning error is at the level of ten meters; if the vehicle entry position is to be located, the entry time is counted, and the storage location status is updated, the positioning error is at the level of meters; if the object needs to be found indoors and the object is small in size, the positioning error is at the sub-meter level.

[0105] Limited by non-ideal factors such as sampling time offset (STO), sampling frequency offset (SFO) and carrier frequency offset (CFO) on both sides of the backscatter communication system, and non-ideal factors introduced by CFO on the transponder side, impedance switching / environmental changes / transmission lines of the transponder, the positioning accuracy of backscatter communication will be greatly affected. If the transponder is a passive transponder, it does not have the ability to accurately measure the positioning reference signal (PRS), so the impact of STO or SFO can be ignored on the transponder side.

[0106] STO: The clocks of the transmitter and receiver are not synchronized, resulting in inconsistent sampling clocks between the digital to analog converter (DAC) at the transmitter and the analog to digital converter (ADC) at the receiver. 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.

[0107] SFO: The clock asynchrony between the transmitter and receiver will also lead to sampling frequency offset, which is equivalent to adding noise to the phase offset caused by STO between subcarriers, resulting in ToF errors in multiple estimates of the same propagation path, and there is also the problem of inconsistent estimated values.

[0108] CFO: Limited by the hardware capabilities of the transponder, the poor stability of the crystal oscillator will introduce local oscillator frequency deviation, and when modulating data, it will introduce carrier frequency offset as the switch switches different load impedances. Secondly, when the transponder moves, it will generate Doppler frequency shift relative to the transceiver, which will also cause carrier frequency offset to the backscatter communication system.

[0109] Phase rotation of reflection coefficient: When the answering 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 answering device is superimposed on the distance between the answering device and the reading and writing device, and the offset is related to the size of the impedance.

[0110] Phase rotation due to environmental changes or carrier frequency changes: The input impedance of the answering 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 answering device will change, further affecting the matching degree and causing phase rotation on the answering device side. It is worth noting that this problem can be avoided by using a self-tuning network.

[0111] 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 backscattered signal does not enter the transponder side. If OOK, FSK or PSK modulation based on 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 readers and writers receive the backscattered signal sent by the transponder for estimation and processing.

[0112] 6. Backscatter Communication Perception Technology

[0113] The transponder, such as a tag, is installed on the sensing target or deployed in the vicinity of the sensing target. The reader / writer can detect the backscattered signal of the transponder, classify the signal, estimate the sensing parameters, and perform a series of operations to achieve the purpose of sensing or synaesthesia integration. Related research shows that the sensing or synaesthesia integration based on backscattering has the following advantages:

[0114] (1) By installing different transponder devices on different sensing targets or in the surrounding areas of the targets, the sensing or synaesthesia integrated receiver can distinguish different sensing targets based on the different signal characteristics of the backscattered signals of different transponder devices, and accurately associate the sensing targets with the sensing data in multi-target sensing. In addition, the transponder 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.

[0115] (2) By integrating a power amplifier on the answering device or using a multi-antenna beamforming design, the signal strength of the backscattered signal of the answering device can be improved, the perception signal-to-noise ratio or communication signal-to-noise ratio can be improved, and thus the reliability of perception or synaesthesia integration can be improved. For the perception of device decoupling that does not use backscattering 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 answering device;

[0116] (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.

[0117] (4) Taking advantage of the low cost, low power consumption, small size and easy deployment of transponder devices, multiple transponder devices can be deployed in the environment, such as near the sensing target, and the backscattered signals of multiple transponder devices at different locations can be jointly sensed and processed to increase the sensing range, that is, to 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.

[0118] 7. Backscatter communication positioning technology

[0119] The answering device 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 booths in museums. Table 1 takes the answering device as a tag device as an example, and shows the business types, indicator requirements, etc. involved in several typical positioning scenarios based on backscatter communication from different dimensions. The positioning types based on backscatter communication 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.

[0120]

[0121] Table 1

[0122] 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), arrival phase difference, etc.

[0123] 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 the RSS / RSSI 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 signal propagation time of multiple anchor devices, but the positioning accuracy is also affected by the clock synchronization error between different network devices.

[0124] 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, etc. Table 2 takes the transponder as a tag device as an example to summarize several typical backscatter communication-based positioning methods. Since the mobility of the tag device, the hardware capabilities of the transceiver device, the wireless channel environment and other irrational factors 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 errors 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, that is, the read-write 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.

[0125]

[0126] Table 2

[0127] Limited by the hardware capabilities of the transponder, as well as objective environmental factors such as signal attenuation and strong signal interference in the two-way channel, positioning based on backscatter communication generally has problems such as low positioning accuracy and poor stability. In addition, the mobility of the transponder is also a key factor affecting positioning accuracy and stability.

[0128] In addition to the low signal-to-noise ratio (SNR) and the measurement errors introduced by the mobility of the transponder, the positioning technology based on backscattering also has the following technical difficulties:

[0129] (1) Non-ideal factors. The non-ideal factors of the backscatter communication system mentioned above affect the positioning performance of the transponder. For example, positioning based on TOA or TDOA needs to eliminate the influence of CFO on the transponder side and STO and CFO on the transceiver side. However, positioning based on PDOA can ignore the influence of CFO on the transponder side, and needs to focus on the problems such as the deterioration of phase measurement accuracy caused by STO and CFO on the transceiver side.

[0130] (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 small, which affects the positioning accuracy based on ranging methods such as TOA, TDOA, and RTT;

[0131] (3) Few antennas. Limited by hardware cost, power consumption and volume, the transponder will not integrate too many antennas, which affects the positioning accuracy of angle measurement methods such as AOA and DOA. Most related technologies use multiple antennas on the base station side to assist in measuring the incident angle of the backscattered signal, but the robustness of this solution is poor.

[0132] 8. Answering device speed measurement method

[0133] The transponder device, such as a tag device, is installed on the sensing target or deployed in the vicinity of the sensing target. The read-write device can perform a series of operations such as detection, signal classification, and perception parameter estimation on the backscattered signal of the transponder device. When taking inventory and tracking goods, the sensing target is often in motion, and the speed of the sensing target needs to be measured by the receiver. Traditional speed measurement methods include speed measurement methods based on Doppler frequency shift and speed measurement methods based on TD-PDOA. Among them, the speed measurement method based on TD-PDOA is the time-domain arrival phase difference speed measurement method, which measures the phase difference between two moments based on the LOS path at two different moments, thereby measuring the radial velocity of the transponder device.

[0134] like Figure 8As shown, it is assumed that the answering device moves at a constant speed within a certain period of time, has a LOS path, and the channel does not change during this period of time. It is also assumed that the non-ideal factors in the above-mentioned related technologies do not exist or have been eliminated, the carrier signal frequency is fixed, and the phase difference of the backscattered signal is measured at two different times. Since:

[0135] Δt=t 1 -t 2 ;

[0136] Further transformation, the radial velocity projection of the transponder device relative to the read-write device can be calculated by the following formula:

[0137]

[0138] Where f represents the carrier frequency, V r It represents the radial velocity projection of the answering device relative to the read-write device. The negative sign indicates that the answering device is moving away from the read-write device, and the positive sign indicates that the answering device is approaching the read-write device. It is determined by the change of the phase.

[0139] The above formula can be further derived from the PDOA ranging formula. What is measured is the instantaneous radial velocity of the transponder. If the transponder accelerates or decelerates, the instantaneous radial velocity will change with time.

[0140] When measuring speed using the TD-PDOA method, the following problems exist:

[0141] When the answering device sends an uplink backscatter signal based on the downlink carrier signal, a phase rotation of the reflection coefficient is inevitably introduced due to impedance switching;

[0142] When the read / write device measures the phase at two different times, there will be a phase discontinuity problem between the two measurement times on the read / write device side;

[0143] The existence of SFO and CFO on the transponder side and the reader side will increase the error of phase measurement;

[0144] A possible solution to avoid phase rotation of the reflection coefficient is for the transponder to perform total reflection. However, when the transponder performs total reflection, co-channel interference will be caused, and since the energy of the backscattered signal reaching the read-write device is low, the demodulation performance will be affected.

[0145] The application scenarios, related technologies and concepts of the embodiments of the present application are introduced above. The signal processing method provided by the embodiments of the present application is described in detail below through some embodiments and their application scenarios in conjunction with the accompanying drawings.

[0146] See also Fig. 9FIG. 1 is a flowchart of a signal processing method according to an embodiment of the present invention, wherein the method comprises the following steps:

[0147] S910: The first communication device receives a first signal and a second signal from the answering device.

[0148] The first signal is an upper sideband signal of a backscatter signal generated based on modulation of the first carrier signal, and the second signal is a lower sideband signal of the backscatter signal;

[0149] Or, the first signal is a signal generated by modulating a second carrier signal generated by the answering device, and the second signal is a signal generated by modulating a third carrier signal generated by the answering device. The first signal and the second signal are sent simultaneously.

[0150] S920: The first communication device demodulates or measures the first signal and the second signal according to the first information and the second information.

[0151] The first information is used to indicate information related to signal transmission, and the second information includes information about a signal processing cycle or information about a signal processing window.

[0152] By applying the method provided in the embodiment of the present application, after the first communication device receives the first signal and the second signal from the answering device, the first signal and the second signal are demodulated and measured according to the first information and the second information, the first information is used to indicate information related to signal transmission, and the second information includes information about the signal processing cycle or information about the signal processing window. According to the first information and the second information, effective demodulation or measurement of the first signal and the second signal can be achieved, which helps to improve the measurement accuracy.

[0153] In the embodiment of the present application, the first communication device may be a base station, a reader, a relay, a terminal, etc., and the answering device may be a tag device, a terminal, etc.

[0154] In a single-base architecture, the first communication device is both a transmitting device and a receiving device. There are the following situations:

[0155] 1) The first communication device is a base station, a reader or a relay, and the answering device is a tag device;

[0156] 2) The first communication device is a terminal, and the answering device is a tag device;

[0157] 3) The first communication device is a base station or a relay, and the answering device is a terminal.

[0158] In a dual-base architecture, the first communication device is a receiving device and the second communication device is a transmitting device. The following situations may occur:

[0159] The first communication device is a terminal, the second communication device is a base station or a reader or a relay, and the answering device is a tag device.

[0160] The answering device in the embodiment of the present application may include a passive answering device, a semi-passive answering device and an active answering device, and is mainly aimed at answering devices with frequency shifting capability or capable of generating two carrier signals of different frequencies at the same time.

[0161] The answering device may receive the first information, generate a first signal and a second signal according to the first information, and send the first signal and the second signal to the first communication device.

[0162] The first communication device or the second communication device can send a first carrier signal to the answering device, and the answering device receives the first carrier signal sent by the first communication device or the second communication device, and generates a backscatter signal based on the modulation of the first carrier signal. The upper sideband signal of the backscatter signal is the first signal, and the lower sideband signal of the backscatter signal is the second signal.

[0163] Alternatively, the answering device may generate the second carrier signal and the third carrier signal by itself, modulate the second carrier signal to generate the first signal, and modulate the third carrier signal to generate the second signal. The second carrier signal and the third carrier signal may be the same signal or different signals. In the case where the second carrier signal and the third carrier signal are the same signal, the answering device may modulate the second carrier signal or the third carrier signal to generate the first signal and the second signal. The answering device may send the first signal and the second signal simultaneously.

[0164] After receiving the first signal and the second signal from the answering device, the first communication device may demodulate or measure the first signal and the second signal according to the first information and the second information.

[0165] In some embodiments of the present application, the first information may include at least one of the following:

[0166] Information on signal transmission resources;

[0167] Information on signal modulation methods;

[0168] Information on the signal modulation rate;

[0169] Information about the signal modulation frequency.

[0170] Optionally, the information of the signal transmission resource may include at least one of the following:

[0171] Information about time domain resources of a signal, such as information about time domain resources of the first signal or the second signal, or information about continuous time domain resources of the first signal or the second signal;

[0172] Information that different signals have different time domain resources, such as information that the first signal and the second signal have different time domain resources;

[0173] Information about frequency domain resources of a signal, such as information about frequency domain resources of a first signal or a second signal;

[0174] Different signals have information about the same frequency domain resources, such as the first signal and the second signal have information about the same frequency domain resources.

[0175] Optionally, the information of the signal modulation mode may include at least one of the following:

[0176] The amplitude modulation information of the signal;

[0177] Frequency modulation information of the signal;

[0178] Phase modulation information of the signal;

[0179] The mixed modulation information of the signal.

[0180] Optionally, the information of the signal modulation frequency may include at least one of the following:

[0181] Information about the Backscatter Link Frequency (BLF) of the signal;

[0182] Different signals have information on the same backscatter link frequency;

[0183] The impedance of the signal switches at a certain frequency.

[0184] Under a single-base architecture, the first communication device can determine the first information by itself, such as determining the first information based on capability information of the answering device. After determining the first information, the first information can be sent to the answering device so that the answering device can modulate and generate the first signal and the second signal based on the first information.

[0185] In a dual-base architecture, the second communication device can determine the first information, such as determining the first information based on the capability information of the answering device, and then send the first information to the first communication device and the answering device respectively, so that the answering device can modulate and generate the first signal and the second signal based on the first information, and the first communication device can obtain transmission-related information of the first signal and the second signal based on the first information.

[0186] In some embodiments of the present application, when the first signal is a signal modulated by a second carrier signal generated by the answering device and the second signal is a signal modulated by a third carrier signal generated by the answering device, the first information may further include information for instructing the answering device to simultaneously send at least two uplink signals.

[0187] That is, when the answering device has the capability of generating a carrier signal, the first information may include:

[0188] Information for instructing the answering device to send at least two uplink signals simultaneously;

[0189] Information about transmission resources of at least two uplink signals, such as information about different carrier frequencies of at least two uplink signals;

[0190] Information on modulation modes of at least two uplink signals;

[0191] Information about the modulation rates of at least two uplink signals.

[0192] After receiving the first information, the answering device can generate at least two carrier signals, such as the second carrier signal and the third carrier signal, according to the first information, and modulate the data bits to be sent according to the modulation mode, such as generating the first signal based on the modulation of the second carrier signal and generating the second signal based on the modulation of the third carrier signal, and simultaneously send the first signal and the second signal to the first communication device. The first information also includes information for instructing the answering device to send at least two uplink signals simultaneously, which facilitates the answering device to generate the first signal and the second signal according to the first information, and helps the first communication device to obtain the transmission-related information of the first signal and the second signal according to the first information.

[0193] In some embodiments of the present application, the second information may include at least one of the following:

[0194] Information about the signal processing cycle;

[0195] Information about the signal processing window.

[0196] The signal processing period is related to the distance between the answering device and other answering devices or the empirical movement rate of the answering device, and may include a demodulation period or a measurement period of the first signal and the second signal; or the signal processing window is related to the empirical movement rate of the answering device or the backscatter link frequency, and may include a demodulation window or a measurement window of the first signal and the second signal. Signal processing may include signal demodulation or signal measurement or signal detection.

[0197] The second information is used to instruct the first communication device to demodulate or measure the first signal and the second signal sent by the answering device through the configured signal processing window within a fixed signal processing period. The signal processing period can be a time domain resource indicated or preconfigured by the network side device, and the time domain resource can be periodic or non-periodic. The signal processing window is a window that appears at a certain interval in the time domain and has a fixed duration. The value depends on the movement rate of the answering device and the frequency shift size indicated by the network side device.

[0198] The backscatter link frequency and the movement rate of the answering device will affect the length of the processing cycle of the upper sideband signal and the lower sideband signal processed by the receiving device. In order to ensure the resolution of the upper and lower sideband signals on the receiving device side and correctly process the upper and lower sideband signals, it is necessary to configure the signal processing window of the upper and lower sideband signals. The information of the signal processing window may be included in the second information, or determined by pre-configuration information.

[0199] It should be noted that, unlike the mobility management measurement process of NR, the receiving device does not measure RSRP and RSSI of the received signal at the pre-configured frequency. The embodiment of the present application is for the measurement of the backscattered signal after modulation based on the carrier signal, not the reference signal; and the reference signals of the radio resource management (Radio Resource Management, RRM) measurement object in NR include the reference signal based on the synchronization signal block (Synchronization Signal Block, SSB) and the reference signal based on the channel state information (Channel State Information, CSI). It is worth noting that when defining the signal processing window, you can refer to the concept of SSB Measurement Timing Configuration (SMTC) introduced in the NR measurement configuration, which appears at a certain interval in the time domain, and the continuous processing time is a fixed signal processing window.

[0200] The first communication device can obtain signal processing related information of the first signal and the second signal according to the second information, and then can effectively demodulate or measure the first signal and the second signal according to the first information and the second information, and further obtain the measurement value difference of the first signal and the second signal.

[0201] In some embodiments of the present application, the method may further include the following steps:

[0202] The first communication device receives the first information or the second information from the second communication device.

[0203] Optionally, the second communication device may send the first information to the answering device and send the first information or the second information to the first communication device. The second information may also be sent to the first communication device by other application servers, such as a Location Management Function (LMF) after configuration.

[0204] In some embodiments of the present application, the method may further include the following steps:

[0205] The first communications device determines the second information based on the preconfiguration information.

[0206] The first communication device obtains preconfiguration information in advance, and determines the second information based on the preconfiguration information. The preconfiguration information may be predefined, or configured by the second communication device, or configured by other application servers, such as LMF.

[0207] In an embodiment of the present application, under a single-base architecture, the first communication device can determine the first information or the second information by itself, such as determining the first information according to the capability information of the answering device and determining the second information based on pre-configuration information.

[0208] In a dual-base architecture, the first communication device is a receiving device, and the second communication device is a transmitting device. There are the following situations:

[0209] 1) The second communication device determines the first information and sends the first information to the first communication device and the answering device respectively. The first communication device receives the first information from the second communication device and determines the second information based on the preconfigured information, and the answering device receives the first information from the second communication device;

[0210] 2) The second communication device determines the first information and the second information, sends the first information to the first communication device and the answering device, and sends the second information to the first communication device. The first communication device receives the first information and the second information from the second communication device, and the answering device receives the first information from the second communication device;

[0211] 3) The second communication device determines the first information and the second information, sends the first information to the answering device, and sends the second information to the first communication device. The first communication device receives the second information from the second communication device, and determines the first information based on the way the second communication device determines the first information.

[0212] The first communication device determines the second information based on preconfiguration information, the preconfiguration information includes at least one configuration information, each configuration information includes signal processing related information and answering device experience motion rate information or backscatter link frequency information having a corresponding relationship. The answering device experience motion rate information is such as the answering device experience motion rate or the experience motion rate level, and the backscatter link frequency information is such as the backscatter link frequency or the backscatter link frequency level.

[0213] The first communication device may first determine the first empirical motion rate information or the first backscatter link frequency information of the answering device, and then search the pre-configuration information for signal processing related information that has a corresponding relationship with the first motion rate information or the first backscatter link frequency information, such as signal processing cycle information or signal processing window information.

[0214] As shown in Table 3, it is a form of expression of pre-configuration information, which includes multiple configuration information, each of which includes an experience motion rate level, a backscatter link frequency level, a signal processing window, and a signal processing period with a corresponding relationship:

[0215] Movement speed level Backscatter link frequency level Signal Processing Window Signal processing cycle Movement speed level 1 BLF Level 1 Processing window 1 Processing cycle 1 Movement speed level 2 BLF Level 2 Processing Window 2 Processing cycle 2 …… …… …… …… Movement speed level N1 BLF Level N2 Processing window N3 Processing cycle N4

[0216] Table 3

[0217] Among them, N1 represents the total number of experienced motion rate levels of the answering device, N2 represents the total number of BLF levels, N3 represents the total number of signal processing windows, and N4 represents the total number of signal processing cycles.

[0218] For example, the first communication device determines that the first empirical motion rate level of the answering device is motion rate level 2, and the first backscatter link frequency level is BLF level 2. The signal processing period and signal processing window corresponding to the motion rate level 2 and BLF level 2 are found in the pre-configuration information, which are processing period 2 and processing window 2 respectively.

[0219] The preconfiguration information can be updated and maintained according to actual conditions. The first communication device can accurately determine the second information based on the preconfiguration information.

[0220] In some embodiments of the present application, the method may further include the following steps:

[0221] The first communication device obtains third information;

[0222] The first communication device determines the second information based on the preconfiguration information, which may include the following steps:

[0223] The first communication device determines the second information based on the preconfiguration information, the first information and the third information;

[0224] The third information may include at least one of the following:

[0225] Information about business scenarios;

[0226] The experienced motion rate information of the responding device.

[0227] In an embodiment of the present application, the first communication device may obtain the third information. Optionally, the second communication device may send the third information to the first communication device, and the first communication device may receive the third information from the second communication device, or the first communication device may determine the third information based on preconfigured scenario-related information. The third information may include information about the business scenario or information about the experienced motion rate of the answering device.

[0228] The first communication device can determine the empirical motion rate of the answering device based on the third information, and the empirical motion rate can correspond to a motion rate level. The first communication device can determine the backscatter link frequency of the answering device based on the first information, and the backscatter link frequency can correspond to a backscatter link frequency level. Optionally, if the third information includes information about a business scenario, the first communication device can determine the empirical motion rate of the answering device based on the business scenario. After the first communication device determines the empirical motion rate or backscatter link frequency of the answering device, it can determine the second information by searching for relevant information with a corresponding relationship in the preconfigured information.

[0229] The first communication device can accurately determine the second information based on the preconfiguration information, the first information and the third information.

[0230] In some embodiments of the present application, after the first communication device demodulates or measures the first signal and the second signal according to the first information and the second information, the method may further include the following steps:

[0231] The first communications device determines a difference in a measurement quantity between the first signal and the second signal.

[0232] The measured quantity difference may include a frequency difference, an amplitude difference, or a phase difference.

[0233] In some embodiments of the present application, after the first communication device determines the difference between the measurement quantities of the first signal and the second signal, the method may further include one of the following:

[0234] The first communication device reports a measurement value difference between the first signal and the second signal to the second communication device;

[0235] The first communication device determines the speed measurement result of the answering device based on the difference between the measurement amount of the first signal and the second signal;

[0236] The first communication device sends the measurement quantity difference between the first signal and the second signal determined by itself to other first communication devices.

[0237] In an embodiment of the present application, after receiving the first signal and the second signal of the answering device, demodulating or measuring the first signal and the second signal according to the first information and the second information, and determining the difference in the measured quantity of the first signal and the second signal, the first communication device may report the difference in the measured quantity of the first signal and the second signal to the second communication device, so that the second communication device determines the speed measurement result of the answering device based on the difference in the measured quantity of the first signal and the second signal. Optionally, the second communication device may determine the speed measurement result of the answering device based on the difference in the measured quantity of the first signal and the second signal received from the first communication device. Optionally, the second communication device may receive the difference in the measured quantity of the first signal and the second signal reported by the first communication device or other first communication devices, and determine the speed measurement result of the answering device based on the difference in the measured quantity of the first signal and the second signal. That is, the second communication device may receive the difference in the measured quantity of the first signal and the second signal from multiple first communication devices, and determine the speed measurement result of the answering device based on the difference in the measured quantity of the received first signal and the second signal, so as to ensure the accuracy of the speed measurement result.

[0238] Alternatively, after receiving the first signal and the second signal of the answering device and demodulating or measuring the first signal and the second signal according to the first information and the second information, and determining the difference between the measured quantities of the first signal and the second signal, the first communication device may determine the speed measurement result of the answering device based on the difference between the measured quantities of the first signal and the second signal. Optionally, the first communication device may determine the speed measurement result of the answering device based on the difference between the measured quantities of the first signal and the second signal determined by itself. Optionally, the first communication device may determine the speed measurement result of the answering device based on the difference between the measured quantities of the first signal and the second signal determined by itself and the difference between the measured quantities of the first signal and the second signal received from other first communication devices, that is, the speed measurement result of the answering device is determined jointly by multiple first communication devices to ensure the accuracy of the speed measurement result. Optionally, after the first communication device determines the speed measurement result of the answering device, the first communication device may report the speed measurement result of the answering device to the second communication device. Optionally, the second communication device may receive the speed measurement result of the answering device reported by the first communication device or other first communication devices. Optionally, the second communication device may determine a final speed measurement result of the answering device according to the speed measurement results of the answering device reported by a plurality of first communication devices, so as to ensure the accuracy of the speed measurement result.

[0239] Alternatively, after receiving the first signal and the second signal of the answering device and demodulating or measuring the first signal and the second signal according to the first information and the second information, and determining the difference between the measured quantities of the first signal and the second signal, the first communication device can send the difference between the measured quantities of the first signal and the second signal determined by itself to other first communication devices, so that the other first communication devices can determine the speed measurement result of the answering device based on the difference between the measured quantities of the received first signal and the second signal and the difference between the measured quantities of the first signal and the second signal determined by themselves, that is, the speed measurement result of the answering device is determined jointly by multiple first communication devices to ensure the accuracy of the speed measurement result. Optionally, after determining the speed measurement result of the answering device, the other first communication devices can report the speed measurement result to the second communication device.

[0240] In some embodiments of the present application, the first communication device may report the difference in measured values ​​of the first signal and the second signal to the second communication device based on the fourth information, wherein the fourth information at least includes the reported transmission resource information. The fourth information may be predefined or configured by the second communication device. Optionally, before the second communication device receives the difference in measured values ​​of the first signal and the second signal reported by the first communication device or other first communication devices, the second communication device may send the fourth information to the first communication device or other first communication devices, and the first communication device or other first communication devices may report the difference in measured values ​​of the first signal and the second signal based on the fourth information, which may improve the efficiency of information reporting.

[0241] In some embodiments of the present application, the first communication device may report the speed measurement result of the answering device to the second communication device based on the fifth information, wherein the fifth information at least includes the reported transmission resource information. The fifth information may be predefined or configured by the second communication device. Optionally, before the second communication device receives the speed measurement result of the answering device reported by the first communication device or other first communication devices, the second communication device may send the fifth information to the first communication device or other first communication devices, and the first communication device or other first communication devices report the speed measurement result based on the fifth information, which can improve the result reporting efficiency.

[0242] In some embodiments of the present application, before the first communication device receives the first signal and the second signal from the answering device, the method may further include the following steps:

[0243] The first communication device obtains capability information of the answering device;

[0244] The capability information includes at least one of the following:

[0245] Carrier generation capability information;

[0246] Frequency deviation capability information;

[0247] Oscillator capability information;

[0248] Amplify capability information;

[0249] Modulation mode support information.

[0250] In an embodiment of the present application, before the first communication device receives the first signal and the second signal from the answering device, the capability information of the answering device may be obtained first. Optionally, before the answering device receives the first information, the capability information of the answering device may be sent to the first communication device or the second communication device. Optionally, the first communication device may receive the capability information of the answering device from the answering device. Optionally, the first communication device may receive the capability information of the answering device from other devices, such as the second communication device, that is, the answering device sends the capability information to other devices, and then sends it to the first communication device through the other devices. Optionally, before the second communication device sends the first information to the answering device, the second communication device may obtain the capability information of the answering device. Optionally, the second communication device may receive the capability information of the answering device from the answering device. Optionally, the second communication device may receive the capability information of the answering device from other devices, such as the first communication device.

[0251] The capability information of the answering device may include at least one of the following:

[0252] 1) Carrier generation capability information, through which it can be determined whether the answering device has the carrier generation capability. The answering device with the carrier generation capability can be called an active answering device, and the device without the carrier generation capability can be called a passive answering device or a semi-passive answering device;

[0253] 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;

[0254] 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;

[0255] 4) Amplification capability information, such as whether a reflection amplifier or a downlink low-noise amplifier is configured;

[0256] 5) Modulation mode support information, such as whether it supports amplitude modulation, frequency modulation, phase modulation, high-order modulation and other modulation modes.

[0257] In addition to the above information, the capability information of the answering device may also include other information, such as storage capacity, number and value of load impedances, constellation point resolution, error vector magnitude (EVM), and the like.

[0258] The first communication device may determine the first information according to the capability information of the answering device, so that the determined first information can better match the capability of the answering device.

[0259] In some embodiments of the present application, the answering device may report the capability information of the answering device to the first communication device or the second communication device in at least one of the following situations:

[0260] Sending a random access request;

[0261] Send uplink control information;

[0262] Receive query signaling;

[0263] Receiving a paging signaling;

[0264] Receive confirmation response signaling.

[0265] That is, the answering device can report the capability information when sending a random access request, such as in the uplink Msg1 initiated on the Physical Random Access Channel (PRACH), or in the first RN16 sent after receiving the query signaling. Among them, Msg1 can also correspond to the situation of MsgA in the two-step RACH;

[0266] Or the answering device may report capability information when sending uplink control information;

[0267] Or the answering device may report capability information after receiving the query signaling;

[0268] Or the answering device may report the capability information after receiving the paging signaling, for example, the answering device periodically monitors the paging message to establish a service connection, and reports based on the paging message obtained by decoding the Physical Downlink Shared Channel (PDSCH) and the configured uplink transmission resources;

[0269] Or the answering device may report the capability information after receiving the confirmation response signaling, such as reporting the capability information after receiving the confirmation signaling (ACK) from the first communication device or the second communication device or after the first communication device or the second communication device responds to the answering device ID.

[0270] The embodiment of the present application can demodulate or measure the first signal and the second signal according to the first information and the second information to determine the difference in the measured quantity, and can further determine the speed measurement result based on the difference in the measured quantity. In addition, while realizing the speed measurement, it can also carry the bit data to be sent by the answering device for communication.

[0271] The embodiment of the present application applies the speed measurement method based on Doppler frequency deviation to the backscatter communication system, which can avoid a series of problems existing in speed measurement by the TD-PDOA method. For ease of understanding, the speed measurement principle based on Doppler frequency deviation is described below.

[0272] like Fig.10 As shown, the answering device modulates based on the incident downlink carrier signal, Z A is the antenna impedance, Z 1 , Z 2 Represents different load impedances, assuming that the frequency of the downlink carrier signal is f c , the backscatter link frequency is f BLF , the frequency offset introduced by the answering device is f offset1 , the frequency shifting signal f H It can be expressed as f c +f BLF +f offset1 , f L It can be expressed as f c -f BLF +f offset1 On the first communication device side, the signal received by the first communication device is the upper sideband signal and the lower sideband signal sent by the moving answering device, and the corresponding signal frequencies are f d1 and f d2 , the frequency offset of the first communication device is f offset2 , the signal frequency difference Δf between the upper sideband signal and the lower sideband signal on the first communication device side is expressed as:

[0273]

[0274] Where, the speed of light c = 3*10 8 m / s.

[0275] The above derivation is based on a single-base architecture, so the number 2 is multiplied on the basis of the traditional Doppler expression. It can be seen from the expression that Δf is related to the movement speed v of the transponder and the backscatter link frequency f. BLF For example, if the answering device moves at a constant speed of 0.75 m / s, f BLFIf the f is 5MHz and 30MHz respectively, then in a single-base architecture, the measurement window of the backscatter signal should be no less than 20s and 3s respectively, and in a dual-base architecture, the measurement window of the backscatter signal should be no less than 40s and 6s respectively. For another example, if the answering device moves at a higher speed, such as 4m / s, then f BLF If the frequency is 20MHz, then in a single-base architecture, the measurement window of the backscatter signal should be no less than 0.9s, and in a dual-base architecture, the measurement window of the backscatter signal should be no less than 1.8s. It can be seen that the frequency shift size and movement rate of the answering device determine the size of the backscatter signal measurement window of the first communication device.

[0276] The embodiments of the present application can eliminate the frequency shift of the answering device side and the transceiver device, and to a certain extent can avoid the measurement error caused by the frequency deviation on the speed measurement accuracy.

[0277] Reconsider the mathematical derivation of the speed measurement principle under the dual-base architecture. The frequency offset introduced by the answering device is f offset1 The frequency offset introduced by the transmitting device to the carrier signal is f offset2 The frequency offset introduced by the receiving device to the backscattered signal is f offset3 The answering device responds based on the incident downlink carrier signal (frequency f c ) is modulated, and the response is based on the incident carrier frequency received by the device: f c +f offset2 Assume the backscatter link frequency is f BLF , f H and f L Can be expressed as: f c +f BLF +f offset1 +f offset3 , f c -f BLF +f offset1 +f offset3 The signals received by the receiving device are the upper sideband signal and the lower sideband signal sent by the motion response device, and the corresponding signal frequencies are f d1 and f d2 , subtracting the two signal frequencies yields:

[0278]

[0279]

[0280] Therefore, it can be seen that the embodiment of the present application can eliminate the frequency shift of the answering device side and the transceiver device, and to a certain extent can avoid the measurement error caused by frequency deviation on the speed measurement accuracy.

[0281] For ease of understanding, the technical solution provided by the embodiment of the present application is further described below through specific examples. In the following examples, it is assumed that the answering device moves at a uniform speed and has a LOS path during the measurement time. In addition, it is necessary to ensure that the upper sideband signal and the lower sideband signal of the backscattered signal are within the same frequency band to ensure that the frequency deviation generated by the RF demodulation circuit of the same first communication device is consistent.

[0282] Example 1: The second communication device indicates the measurement window of the first communication device

[0283] Taking the dual-base architecture as an example, the core idea of ​​this example is that the second communication device, such as a base station, indicates the first information to the answering device and sends a first carrier signal according to the capability information of the answering device. The first carrier signal can also be called a speed measurement reference signal, and indicates the first information and the second information to the first communication device, such as a terminal. The first communication device receives the first signal and the second signal backscattered by the answering device, and measures the frequency difference between the first signal and the second signal within the measurement window.

[0284] A possible transfer process is as follows:

[0285] The answering device reports its capability information to a second communication device, such as a base station;

[0286] The second communication device sends first information to the answering device and the first communication device, such as a terminal, and sends a first carrier signal to the answering device;

[0287] The second communication device sends second information to the first communication device, where the second information includes a measurement period and a measurement window of the backscatter signal;

[0288] The answering device demodulates the first information, modulates the data bits to be sent based on the first information, and sends a backscattered signal, i.e., a first signal and a second signal, to the first communication device; the first signal and the second signal are an upper sideband signal and a lower sideband signal, respectively, and transmission resources of the upper sideband signal and the lower sideband signal can be obtained through the first information;

[0289] The first communication device receives the first information and the second information, as well as the first signal and the second signal, demodulates or measures the first signal and the second signal in a specified measurement period and measurement window, obtains a frequency difference, and implements speed measurement.

[0290] Optionally, the first communication device reports the frequency difference between the first signal and the second signal according to the fourth information, or reports the speed measurement result according to the fifth information. The fourth information or the fifth information includes reported transmission resource information, which may be indicated by the second communication device or preconfigured.

[0291] Specifically, the second information of this example is configured by indication, which requires prior information. For example, it is necessary to determine the range of motion speed according to its possible business scenarios, and comprehensively indicate the measurement period and measurement window of the backscatter signal to the first communication device according to the BLF to be indicated.

[0292] Assume that during the inventory of goods in a factory, the speed of goods with transponders attached needs to be measured to improve the efficiency of inventory. Under the dual-base architecture, the known prior information includes: the transponder moves at a constant speed of up to 3m / s, and the BLF is up to 10MHz. The measurement window of the backscatter signal should be no less than 5s to avoid measurement errors caused by insufficient measurement accuracy. The measurement period depends on the distance between the goods or the range that can be counted.

[0293] Taking a single-base architecture as an example, a first communication device, such as a base station, indicates first information to the answering device and sends a first carrier signal (or a speed measurement reference signal) according to the capability information of the answering device. The first communication device receives the first signal and the second signal backscattered by the answering device, and measures the frequency difference between the first signal and the second signal within a measurement window, where the measurement window is obtained according to the capability information of the answering device and the first information.

[0294] It can be seen that, in a single-base architecture, since the transmitting and receiving devices are the same device, there is no need for the transmitting device to indicate the first information to the receiving device, which simplifies the transmission process.

[0295] Example 2: Preconfiguring a measurement window for a first communication device

[0296] Taking the dual-base architecture as an example, the core idea of ​​this example is that the second information is preconfigured. The second communication device, such as a base station, can indicate the first information to the answering device and send a first carrier signal (or a speed measurement reference signal) based on the capability information of the answering device, and indicate the first information to the first communication device, such as a terminal. The first communication device receives the first signal and the second signal backscattered by the answering device, and selects the corresponding measurement window in the preconfigured information according to the first information to demodulate or measure the first signal and the second signal to obtain the frequency difference. The preconfigured information can be predefined and maintained and updated, or it can be sent to the first communication device together with the first information after being configured by the second communication device or other application server.

[0297] Table 3 shows a possible form of the pre-configuration information. Of course, the pre-configuration information is not unique, but is only an example.

[0298] A possible transfer process is as follows:

[0299] The tag device reports its capability information to the second communication device, such as a base station;

[0300] The second communication device sends first information to the tag device and the first communication device, such as a terminal, and sends a first carrier signal to the tag device;

[0301] Optionally, the second communication device sends a preconfigured table corresponding to the second information to the first communication device, and the preconfigured table may be sent separately or together with the first information;

[0302] The answering device demodulates the first information, modulates the data bits to be sent based on the first information, and sends a backscattered signal, i.e., a first signal and a second signal, to the first communication device; the first signal and the second signal are an upper sideband signal and a lower sideband signal, respectively, and the transmission resources of the upper sideband signal and the lower sideband signal can be obtained through the first information;

[0303] The first communication device receives the first information, the first signal and the second signal, selects a corresponding measurement window and a measurement period in a preconfigured table according to the BLF size and the empirical motion rate size, demodulates or measures the first signal and the second signal, obtains a frequency difference, and implements speed measurement;

[0304] Optionally, the first communication device reports the frequency difference between the first signal and the second signal according to the fourth information, or reports the speed measurement result according to the fifth information. The fourth information or the fifth information includes reported transmission resource information, which may be indicated by the second communication device or preconfigured.

[0305] Taking the single-base architecture as an example, the first communication device, such as a base station, indicates the first information to the answering device and sends the first carrier signal (or speed measurement reference signal) according to the capability information of the tag device. The first communication device receives the first signal and the second signal backscattered by the answering device, and selects a measurement window in the pre-configured information according to the first information to demodulate or measure the first signal and the second signal to obtain the frequency difference. Similarly, the single-base architecture does not require the transmitting device to send the first information to the receiving device, which simplifies the transmission process.

[0306] Example 3: Multiple receiving devices receive backscattered signals

[0307] This example aims to solve the problem that a single receiving device can only measure the radial velocity of the answering device, and considers the joint measurement of multiple receiving devices to obtain the real speed of the answering device. The difference between this example and Example 1 and Example 2 is that the first signal and the second signal reflected by the answering device are received by multiple receiving devices, and the measurement windows of the multiple receiving devices are configured by the transmitting device or in a predefined form. After the multiple receiving devices complete the measurement, the receiving devices can jointly estimate the real speed of the answering device, or report the difference in the measured value, which can be estimated by the transmitting device.

[0308] A possible transfer process is as follows:

[0309] The answering device reports its capability information to a second communication device, such as a base station;

[0310] The second communication device sends first information to the answering device and N first communication devices, such as terminals, and sends a first carrier signal to the answering device;

[0311] The second communication device sends second information to N first communication devices, where the second information includes at least information about the measurement period and the measurement window of the backscatter signal, and the measurement windows indicated to each first communication device may be consistent or inconsistent;

[0312] The answering device demodulates the first information, modulates the data bits to be sent based on the first information, and sends backscattered signals, namely, the first signal and the second signal, to the plurality of first communication devices;

[0313] Each first communication device simultaneously receives the first information and the second information, as well as the first signal and the second signal, demodulates or measures the first signal and the second signal in a specified measurement period and measurement window, obtains a frequency difference, and implements speed measurement;

[0314] Speed ​​test results acquisition:

[0315] Optionally, each first communication device reports a frequency difference between the first signal and the second signal according to the fourth information, or reports a speed measurement result according to the fifth information. The fourth information or the fifth information includes reported transmission resource information, which may be indicated by the second communication device or may be preconfigured;

[0316] Optionally, multiple first communication devices collaborate to obtain a speed measurement result of the answering device, and report the speed measurement result.

[0317] Example 4: Speed ​​measurement method using a carrier signal generated by an answering device

[0318] One possible approach is that the answering device has the ability to generate carrier waves and does not perform backscatter modulation based on the downlink carrier signal. Taking a dual-base architecture + a single receiving device as an example, a possible transmission process is given. It is foreseeable that this scenario is applicable to single-base architecture and multiple receiving devices.

[0319] The answering device reports its capability information to a second communication device, such as a base station;

[0320] The second communication device sends first information to the answering device and the first communication device, such as the terminal, where the first information includes:

[0321] Information used to instruct the answering device to send two uplink signals simultaneously;

[0322] Information about the different carrier frequencies of the two uplink signals;

[0323] Information about transmission resources of two uplink signals;

[0324] Information on the modulation modes of the two uplink signals;

[0325] Information on the modulation rates of the two uplink signals;

[0326] The second communication device sends second information to the first communication device, where the second information at least includes information about a measurement period and a measurement window of an uplink signal of the response device;

[0327] The answering device demodulates the first information, generates a second carrier signal and a third carrier signal based on the first information, modulates the data bits to be sent according to the modulation mode, and sends an uplink signal, namely, the first signal and the second signal, to the first communication device;

[0328] The first communication device receives the first information and the second information, as well as the first signal and the second signal, demodulates or measures the first signal and the second signal in a specified measurement period and measurement window, obtains a frequency difference, and implements speed measurement;

[0329] Optionally, the first communication device reports the frequency difference between the first signal and the second signal according to the fourth information, or reports the speed measurement result according to the fifth information. The fourth information or the fifth information includes reported transmission resource information, which may be indicated by the second communication device or preconfigured.

[0330] Corresponding to the above method embodiment, the present application embodiment also provides a signal processing method, such as Fig.11 As shown, the method may include the following steps:

[0331] S1110: The second communication device sends first information to the answering device, where the first information is used to indicate signal transmission related information;

[0332] S1120: The second communication device sends first information or second information to the first communication device, where the second information includes information about a signal processing cycle or information about a signal processing window.

[0333] By applying the method provided in the embodiment of the present application, the second communication device sends first information to the answering device, where the first information is used to indicate information related to signal transmission, and sends first information or second information to the first communication device, where the second information includes information about the signal processing cycle or information about the signal processing window. The first communication device can demodulate or measure the first signal and the second signal sent by the answering device based on the first information and the second information, thereby achieving effective processing of the first signal and the second signal, and helping to improve measurement accuracy.

[0334] In some embodiments of the present application, the first information includes at least one of the following:

[0335] Information on signal transmission resources;

[0336] Information on signal modulation methods;

[0337] Information on the signal modulation rate;

[0338] Information about the signal modulation frequency.

[0339] In some embodiments of the present application, the information of the signal transmission resource includes at least one of the following:

[0340] Information about the time domain resources of the signal;

[0341] Different signals have information of different time domain resources;

[0342] Information on the frequency domain resources of the signal;

[0343] Different signals have information about the same frequency domain resources;

[0344] Or, the information of the signal modulation method includes at least one of the following:

[0345] The amplitude modulation information of the signal;

[0346] Frequency modulation information of the signal;

[0347] Phase modulation information of the signal;

[0348] Mixed modulation information of the signal;

[0349] Or, the information of the signal modulation frequency includes at least one of the following:

[0350] Information on the backscatter link frequency of the signal;

[0351] Different signals have information on the same backscatter link frequency;

[0352] The impedance of the signal switches at a certain frequency.

[0353] In some embodiments of the present application, the first information further includes:

[0354] Information used to instruct the answering device to send at least two uplink signals simultaneously.

[0355] In some embodiments of the present application, the signal processing period is related to the distance between the answering device and other answering devices or the experienced movement rate of the answering device;

[0356] Alternatively, the signal processing window is related to the experienced motion rate of the transponding device or the backscatter link frequency.

[0357] In some embodiments of the present application, the method further comprises:

[0358] The second communication device transmits a first carrier signal to the answering device.

[0359] In some embodiments of the present application, the method further comprises:

[0360] The second communication device sends third information to the first communication device;

[0361] The third information includes at least one of the following:

[0362] Information about business scenarios;

[0363] The experienced motion rate information of the responding device.

[0364] In some embodiments of the present application, the method further comprises:

[0365] The second communication device receives a measurement value difference between the first signal and the second signal reported by the first communication device or other first communication device;

[0366] The second communication device determines the speed measurement result of the answering device based on the difference in the measured quantity between the first signal and the second signal.

[0367] In some embodiments of the present application, before the second communication device receives the measurement value difference between the first signal and the second signal reported by the first communication device or other first communication devices, the method further includes:

[0368] The second communication device sends fourth information to the first communication device or other first communication devices, where the fourth information at least includes information about the reported transmission resources.

[0369] In some embodiments of the present application, the method further comprises:

[0370] The second communication device receives the speed measurement result of the answering device reported by the first communication device or other first communication devices.

[0371] In some embodiments of the present application, before the second communication device receives the speed measurement result of the answering device reported by the first communication device or other first communication devices, the method further includes:

[0372] The second communication device sends fifth information to the first communication device or other first communication devices, where the fifth information at least includes information about the reported transmission resources.

[0373] In some embodiments of the present application, before the second communication device sends the first information to the answering device, the method further includes:

[0374] The second communication device obtains capability information of the answering device;

[0375] The capability information includes at least one of the following:

[0376] Carrier generation capability information;

[0377] Frequency deviation capability information;

[0378] Oscillator capability information;

[0379] Amplify capability information;

[0380] Modulation mode support information.

[0381] The signal processing method provided in the embodiment of the present application can achieve Fig. 9 The various processes implemented by the illustrated method embodiment achieve the same technical effect and will not be described again here to avoid repetition.

[0382] Corresponding to the above method embodiment, the present application embodiment also provides a signal processing method, such as Fig.12 As shown, the method may include the following steps:

[0383] S1210: The answering device receives the first information;

[0384] S1220: The answering device generates a first signal and a second signal according to the first information;

[0385] S1230: The answering device sends the first signal and the second signal to the first communication device simultaneously;

[0386] Wherein, the first signal is an upper sideband signal of a backscattered signal generated based on modulation of the first carrier signal, and the second signal is a lower sideband signal of the backscattered signal;

[0387] Or, the first signal is a signal generated by modulating a second carrier signal generated by the answering device, and the second signal is a signal generated by modulating a third carrier signal generated by the answering device;

[0388] The first information is used to indicate signal transmission related information.

[0389] By applying the method provided in the embodiment of the present application, the answering device receives the first information, generates the first signal and the second signal according to the first information, and sends them to the first communication device. The first signal and the second signal are generated according to the first information, so that the first communication device can effectively process the first signal and the second signal according to the first information and the second information, which helps to improve the measurement accuracy.

[0390] In some embodiments of the present application, the first information includes at least one of the following:

[0391] Information on signal transmission resources;

[0392] Information on signal modulation methods;

[0393] Information about the signal modulation rate;

[0394] Information about the signal modulation frequency.

[0395] In some embodiments of the present application, the information of the signal transmission resource includes at least one of the following:

[0396] Information about the time domain resources of the signal;

[0397] Different signals have information of different time domain resources;

[0398] Information on the frequency domain resources of the signal;

[0399] Different signals have information about the same frequency domain resources;

[0400] Or, the information of the signal modulation method includes at least one of the following:

[0401] The amplitude modulation information of the signal;

[0402] Frequency modulation information of the signal;

[0403] Phase modulation information of the signal;

[0404] Mixed modulation information of the signal;

[0405] Or, the information of the signal modulation frequency includes at least one of the following:

[0406] Information on the backscatter link frequency of the signal;

[0407] Different signals have information on the same backscatter link frequency;

[0408] The impedance of the signal switches at a certain frequency.

[0409] In some embodiments of the present application, when the first signal is a signal generated by modulating a second carrier signal generated by the answering device, and the second signal is a signal generated by modulating a third carrier signal generated by the answering device, the first information further includes:

[0410] Information used to instruct the answering device to send at least two uplink signals simultaneously.

[0411] In some embodiments of the present application, before the answering device receives the first information, the method further includes:

[0412] The answering device sends the capability information of the answering device to the first communication device or the second communication device;

[0413] The capability information includes at least one of the following:

[0414] Carrier generation capability information;

[0415] Frequency deviation capability information;

[0416] Oscillator capability information;

[0417] Amplify capability information;

[0418] Modulation mode support information.

[0419] In some embodiments of the present application, the answering device reports the capability information of the answering device to the first communication device or the second communication device, including:

[0420] The answering device reports the capability information of the answering device to the first communication device or the second communication device in at least one of the following situations:

[0421] Sending a random access request;

[0422] Send uplink control information;

[0423] Receive query signaling;

[0424] Receiving a paging signaling;

[0425] Receive confirmation response signaling.

[0426] The signal processing method provided in the embodiment of the present application can achieve Fig. 9 , Fig.11 The various processes implemented by the illustrated method embodiment achieve the same technical effect and will not be described again here to avoid repetition.

[0427] 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.

[0428] like Fig.13 As shown, the signal processing device 1300 may include the following modules:

[0429] A first receiving module 1310, configured to receive a first signal and a second signal from a response device;

[0430] A processing module 1320, configured to demodulate or measure the first signal and the second signal according to the first information and the second information;

[0431] Wherein, the first signal is an upper sideband signal of a backscattered signal generated based on modulation of the first carrier signal, and the second signal is a lower sideband signal of the backscattered signal;

[0432] Or, the first signal is a signal generated by modulating a second carrier signal generated by the answering device, and the second signal is a signal generated by modulating a third carrier signal generated by the answering device, and the first signal and the second signal are sent simultaneously;

[0433] The first information is used to indicate information related to signal transmission, and the second information includes information about a signal processing cycle or information about a signal processing window.

[0434] By using the apparatus provided in the embodiment of the present application, after receiving the first signal and the second signal from the answering device, the first signal and the second signal are demodulated or measured according to the first information and the second information, the first information is used to indicate information related to signal transmission, the second information includes information about the signal processing cycle or information about the signal processing window, the first signal and the second signal are sent simultaneously, and according to the first information and the second information, the first signal and the second signal can be effectively processed, which helps to improve the measurement accuracy.

[0435] In some embodiments of the present application, the first information includes at least one of the following:

[0436] Information on signal transmission resources;

[0437] Information on signal modulation methods;

[0438] Information about the signal modulation rate;

[0439] Information about the signal modulation frequency.

[0440] In some embodiments of the present application, the information of the signal transmission resource includes at least one of the following:

[0441] Information about the time domain resources of the signal;

[0442] Different signals have information of different time domain resources;

[0443] Information on the frequency domain resources of the signal;

[0444] Different signals have information about the same frequency domain resources;

[0445] Or, the information of the signal modulation method includes at least one of the following:

[0446] The amplitude modulation information of the signal;

[0447] Frequency modulation information of the signal;

[0448] Phase modulation information of the signal;

[0449] Mixed modulation information of the signal;

[0450] Or, the information of the signal modulation frequency includes at least one of the following:

[0451] Information on the backscatter link frequency of the signal;

[0452] Different signals have information on the same backscatter link frequency;

[0453] The impedance of the signal switches at a certain frequency.

[0454] In some embodiments of the present application, when the first signal is a signal generated by modulating a second carrier signal generated by the answering device, and the second signal is a signal generated by modulating a third carrier signal generated by the answering device, the first information further includes:

[0455] Information used to instruct the answering device to send at least two uplink signals simultaneously.

[0456] In some embodiments of the present application, the signal processing period is related to the distance between the answering device and other answering devices or the experienced movement rate of the answering device;

[0457] Alternatively, the signal processing window is related to the experienced motion rate of the transponding device or the backscatter link frequency.

[0458] In some embodiments of the present application, the first receiving module 1310 is further configured to:

[0459] The first information or the second information is received from the second communication device.

[0460] In some embodiments of the present application, the processing module 1320 is further configured to:

[0461] The second information is determined based on the preconfigured information.

[0462] In some embodiments of the present application, the pre-configuration information includes at least one piece of configuration information, and each piece of configuration information includes corresponding signal processing related information and answering device experienced motion rate information or backscatter link frequency information.

[0463] In some embodiments of the present application, the signal processing device 1300 further includes a first obtaining module, which is used to:

[0464] Obtaining third party information;

[0465] The processing module 1320 is used to:

[0466] determining second information based on the preconfigured information, the first information, and the third information;

[0467] The third information includes at least one of the following:

[0468] Information about business scenarios;

[0469] The experienced motion rate information of the responding device.

[0470] In some embodiments of the present application, the signal processing device 1300 further includes a first determining module, configured to:

[0471] After demodulating or measuring the first signal and the second signal according to the first information and the second information, a difference in the measured quantity between the first signal and the second signal is determined.

[0472] In some embodiments of the present application, the signal processing device 1300 further includes an execution module, configured to execute one of the following after determining the difference between the measurement quantities of the first signal and the second signal:

[0473] Reporting a measurement difference between the first signal and the second signal to the second communication device;

[0474] Determining a speed measurement result of the transponder based on a difference between the measured quantities of the first signal and the second signal;

[0475] The measured value difference between the first signal and the second signal determined by itself is sent to other first communication devices.

[0476] In some embodiments of the present application, the execution module is used to:

[0477] Based on the fourth information, reporting a measurement difference between the first signal and the second signal to the second communication device;

[0478] The fourth information at least includes reported transmission resource information.

[0479] In some embodiments of the present application, the execution module is used to perform one of the following:

[0480] Determine a speed measurement result of the transponder based on a measured value difference between the first signal and the second signal determined by itself;

[0481] The speed measurement result of the answering device is determined based on the measured quantity difference between the first signal and the second signal determined by itself and the measured quantity difference between the first signal and the second signal received from other first communication devices.

[0482] In some embodiments of the present application, the execution module is further used to:

[0483] After determining the speed measurement result of the answering device, the speed measurement result of the answering device is reported to the second communication device.

[0484] In some embodiments of the present application, the execution module is used to:

[0485] Based on the fifth information, reporting the speed measurement result of the answering device to the second communication device;

[0486] The fifth information at least includes reported transmission resource information.

[0487] In some embodiments of the present application, the signal processing device 1300 further includes a second obtaining module, which is used to:

[0488] Before receiving the first signal and the second signal from the answering device, obtaining capability information of the answering device;

[0489] The capability information includes at least one of the following:

[0490] Carrier generation capability information; frequency deviation capability information; oscillator capability information; amplification capability information; modulation mode support information.

[0491] The signal processing device 1300 provided in the embodiment of the present application can realize Fig. 9 The various processes implemented by the illustrated method embodiment achieve the same technical effect and will not be described again here to avoid repetition.

[0492] like Fig.14 As shown, the signal processing device 1400 may include the following modules:

[0493] A first sending module 1410 is configured to send first information to a response device, where the first information is used to indicate signal transmission related information;

[0494] The second sending module 1420 is configured to send first information or second information to the first communication device, where the second information includes information about a signal processing cycle or information about a signal processing window.

[0495] Using the device provided in the embodiment of the present application, first information is sent to the answering device, where the first information is used to indicate information related to signal transmission, and first information or second information is sent to the first communication device, where the second information includes information about the signal processing cycle or information about the signal processing window. The first communication device can demodulate or measure the first signal and the second signal sent by the answering device based on the first information and the second information, thereby achieving effective processing of the first signal and the second signal, which helps to improve measurement accuracy.

[0496] In some embodiments of the present application, the first information includes at least one of the following:

[0497] Information on signal transmission resources; information on signal modulation method; information on signal modulation rate; information on signal modulation frequency.

[0498] In some embodiments of the present application, the information of the signal transmission resource includes at least one of the following:

[0499] Information about the time domain resources of the signal; information about different signals having different time domain resources; information about the frequency domain resources of the signal; information about different signals having the same frequency domain resources;

[0500] Or, the information of the signal modulation method includes at least one of the following:

[0501] Signal amplitude modulation information; signal frequency modulation information; signal phase modulation information; signal mixed modulation information;

[0502] Or, the information of the signal modulation frequency includes at least one of the following:

[0503] Information about the backscatter link frequency of the signal; information about different signals having the same backscatter link frequency; information about the impedance switching frequency of the signal.

[0504] In some embodiments of the present application, the first information further includes:

[0505] Information used to instruct the answering device to send at least two uplink signals simultaneously.

[0506] In some embodiments of the present application, the signal processing period is related to the distance between the answering device and other answering devices or the experienced movement rate of the answering device;

[0507] Alternatively, the signal processing window is related to the experienced motion rate of the transponding device or the backscatter link frequency.

[0508] In some embodiments of the present application, the first sending module 1410 is further configured to:

[0509] A first carrier signal is sent to the answering device.

[0510] In some embodiments of the present application, the second sending module 1420 is further used to:

[0511] sending third information to the first communication device;

[0512] The third information includes at least one of the following:

[0513] Information about business scenarios;

[0514] The experienced motion rate information of the responding device.

[0515] In some embodiments of the present application, the signal processing device 1400 further includes:

[0516] A second receiving module, configured to receive a measurement value difference between a first signal and a second signal reported by a first communication device or another first communication device;

[0517] The second determination module is used to determine the speed measurement result of the answering device based on the difference between the measurement quantities of the first signal and the second signal.

[0518] In some embodiments of the present application, the second sending module 1420 is further used to:

[0519] Before receiving the measurement value difference between the first signal and the second signal reported by the first communication device or other first communication device, fourth information is sent to the first communication device or other first communication device, where the fourth information at least includes information of the reported transmission resource.

[0520] In some embodiments of the present application, the signal processing device 1400 further includes a third receiving module, which is used to:

[0521] Receive the speed measurement result of the answering device reported by the first communication device or other first communication devices.

[0522] In some embodiments of the present application, the second sending module 1420 is further configured to:

[0523] Before receiving the speed measurement result of the answering device reported by the first communication device or other first communication devices, fifth information is sent to the first communication device or other first communication devices, and the fifth information at least includes information of the reported transmission resources.

[0524] In some embodiments of the present application, the signal processing device 1400 further includes a third obtaining module, which is used to:

[0525] Before sending the first information to the answering device, obtaining capability information of the answering device;

[0526] The capability information includes at least one of the following:

[0527] Carrier generation capability information; frequency deviation capability information; oscillator capability information; amplification capability information; modulation mode support information.

[0528] The signal processing device 1400 provided in the embodiment of the present application can realize Fig.11 The various processes implemented by the illustrated method embodiment achieve the same technical effect and will not be described again here to avoid repetition.

[0529] like Fig.15 As shown, the signal processing device 1500 may include the following modules:

[0530] The third receiving module 1510 is used to receive first information;

[0531] A generating module 1520, configured to generate a first signal and a second signal according to the first information;

[0532] The third sending module 1530 is used to send the first signal and the second signal to the first communication device at the same time;

[0533] Wherein, the first signal is an upper sideband signal of a backscattered signal generated based on modulation of the first carrier signal, and the second signal is a lower sideband signal of the backscattered signal;

[0534] Or, the first signal is a signal generated by modulating a second carrier signal generated by the answering device, and the second signal is a signal generated by modulating a third carrier signal generated by the answering device;

[0535] The first information is used to indicate signal transmission related information.

[0536] The device provided in the embodiment of the present application is used to receive first information, generate a first signal and a second signal based on the first information, and send them to a first communication device. The first signal and the second signal are generated based on the first information, so that the first communication device can effectively process the first signal and the second signal based on the first information and the second information, which helps to improve measurement accuracy.

[0537] In some embodiments of the present application, the first information includes at least one of the following:

[0538] Information on signal transmission resources; information on signal modulation method; information on signal modulation rate; information on signal modulation frequency.

[0539] In some embodiments of the present application, the information of the signal transmission resource includes at least one of the following:

[0540] Information about the time domain resources of the signal; information about different signals having different time domain resources; information about the frequency domain resources of the signal; information about different signals having the same frequency domain resources;

[0541] Or, the information of the signal modulation method includes at least one of the following:

[0542] Signal amplitude modulation information; signal frequency modulation information; signal phase modulation information; signal mixed modulation information;

[0543] Or, the information of the signal modulation frequency includes at least one of the following:

[0544] Information about the backscatter link frequency of the signal; information about different signals having the same backscatter link frequency; information about the impedance switching frequency of the signal.

[0545] In some embodiments of the present application, when the first signal is a signal generated by modulating a second carrier signal generated by the answering device, and the second signal is a signal generated by modulating a third carrier signal generated by the answering device, the first information further includes:

[0546] Information used to instruct the answering device to send at least two uplink signals simultaneously.

[0547] In some embodiments of the present application, the third sending module 1530 is further configured to:

[0548] Before receiving the first information, sending capability information of the answering device to the first communication device or the second communication device;

[0549] The capability information includes at least one of the following:

[0550] Carrier generation capability information; frequency deviation capability information; oscillator capability information; amplification capability information; modulation mode support information.

[0551] In some embodiments of the present application, the third sending module 1530 is configured to send the capability information of the response device to the first communication device or the second communication device in at least one of the following situations:

[0552] Send a random access request; send uplink control information; receive query signaling; receive paging signaling; receive confirmation response signaling.

[0553] The signal processing device 1500 provided in the embodiment of the present application can realize Fig.12 The various processes implemented by the illustrated method embodiment achieve the same technical effect and will not be described again here to avoid repetition.

[0554] like Fig.16 As shown, the embodiment of the present application further provides a communication device 1600, including a processor 1601 and a memory 1602, the memory 1602 stores a program or instruction that can be run on the processor 1601, for example, when the communication device 1600 is a first communication device, the program or instruction is executed by the processor 1601 to implement the above Fig. 9 When the communication device 1600 is a second communication device, the program or instruction is executed by the processor 1601 to implement the above Fig.11 When the communication device 1600 is a response device, the program or instruction is executed by the processor 1601 to implement the above Fig.12 The steps of the method embodiment shown in the figure can achieve the same technical effect. To avoid repetition, they will not be described here.

[0555] The embodiment of the present application also provides a terminal, including a processor and a communication interface, the communication interface and the processor are coupled, and the processor is used to run a program or instruction to implement the following Fig. 9 The steps in the method embodiment shown. This terminal embodiment corresponds to the first communication device side method embodiment described above, and each implementation process and implementation method of the above method embodiment can be applied to this terminal embodiment and can achieve the same technical effect. Specifically, Fig.17 A schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0556] The terminal 1700 includes but is not limited to: a radio frequency unit 1701, a network module 1702, an audio output unit 1703, an input unit 1704, a sensor 1705, a display unit 1706, a user input unit 1707, an interface unit 1708, a memory 1709 and at least some of the components of the processor 1710.

[0557] Those skilled in the art will appreciate that the terminal 1700 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 1710 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Fig.17 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.

[0558] It should be understood that in the embodiment of the present application, the input unit 1704 may include a graphics processing unit (GPU) 17041 and a microphone 17042, and the graphics processor 17041 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 1706 may include a display panel 17061, and the display panel 17061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1707 includes a touch panel 17071 and at least one of other input devices 17072. The touch panel 17071 is also called a touch screen. The touch panel 17071 may include two parts: a touch detection device and a touch controller. Other input devices 17072 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.

[0559] In the embodiment of the present application, after receiving downlink data from the network side device, the RF unit 1701 can transmit the data to the processor 1710 for processing; in addition, the RF unit 1701 can send uplink data to the network side device. Generally, the RF unit 1701 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0560] The memory 1709 can be used to store software programs or instructions and various data. The memory 1709 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 1709 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 1709 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0561] The processor 1710 may include one or more processing units; optionally, the processor 1710 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 1710.

[0562] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to Fig. 9 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.

[0563] The embodiment of the present application also provides a network side device, including a processor and a communication interface, the communication interface and the processor are coupled, and the processor is used to run a program or instruction to implement the following Fig.11The steps of the method embodiment shown. This network side device embodiment corresponds to the second communication device side method embodiment described above, and each implementation process and implementation mode of the above method embodiment can be applied to this network side device embodiment and can achieve the same technical effect.

[0564] Specifically, the embodiment of the present application also provides a network side device. Fig.18 As shown, the network side device 1800 includes: an antenna 1801, a radio frequency device 1802, a baseband device 1803, a processor 1804 and a memory 1805. The antenna 1801 is connected to the radio frequency device 1802. In the uplink direction, the radio frequency device 1802 receives information through the antenna 1801 and sends the received information to the baseband device 1803 for processing. In the downlink direction, the baseband device 1803 processes the information to be sent and sends it to the radio frequency device 1802. The radio frequency device 1802 processes the received information and sends it out through the antenna 1801.

[0565] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 1803, which includes a baseband processor.

[0566] The baseband device 1803 may include, for example, at least one baseband board on which a plurality of chips are arranged. Fig.18 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 1805 through a bus interface to call the program in the memory 1805 to execute the network side device operations shown in the above method embodiment.

[0567] The network side device may further include a network interface 1806, which is, for example, a Common Public Radio Interface (CPRI).

[0568] Specifically, the network side device 1800 of the embodiment of the present invention further includes: instructions or programs stored in the memory 1805 and executable on the processor 1804, and the processor 1804 calls the instructions or programs in the memory 1805 to execute Figure X The methods executed by each module shown in XX achieve the same technical effect. To avoid repetition, they will not be repeated here.

[0569] 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 Fig. 9 , Fig.11 or Fig.12 The various processes of the method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0570] The processor is the processor in the terminal 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, etc. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0571] The present application embodiment further provides a chip, the chip includes a processor and a communication interface, the communication interface and the processor are coupled, the processor is used to run a program or instruction, and implement the above Fig. 9 , Fig.11 or Fig.12 The various processes of the method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0572] 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.

[0573] The present application embodiment further provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the above Fig. 9 , Fig.11 or Fig.12 The various processes of the method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0574] The embodiment of the present application also provides a wireless communication system, including: a first communication device or a second communication device, and a response device, wherein the first communication device can be used to perform the following steps: Fig. 9 In the steps of the method embodiment shown, the second communication device can be used to perform the following steps: Fig.11 The steps of the method embodiment shown in the figure can be used to perform the following steps: Fig.12 Steps of the method embodiment are shown.

[0575] 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.

[0576] 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.

[0577] 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, characterized in that: include: The first communication device receives the first signal and the second signal from the answering device; The first communication device demodulates or measures the first signal and the second signal according to the first information and the second information; The first signal is an upper sideband signal of a backscattered signal generated by modulation of a first carrier signal, and the second signal is a lower sideband signal of the backscattered signal; Or, the first signal is a signal generated by modulating a second carrier signal generated by the answering device, the second signal is a signal generated by modulating a third carrier signal generated by the answering device, and the first signal and the second signal are sent simultaneously; The first information is used to indicate information related to signal transmission, and the second information includes information about a signal processing cycle or information about a signal processing window.

2. The method according to claim 1, characterized in that The first information includes at least one of the following: Information on signal transmission resources; Information on signal modulation methods; Information about the signal modulation rate; Information about the signal modulation frequency.

3. The method according to claim 2, characterized in that The information of the signal transmission resource includes at least one of the following: Information about the time domain resources of the signal; Different signals have information of different time domain resources; Information on the frequency domain resources of the signal; Different signals have information about the same frequency domain resources; Or, the information of the signal modulation method includes at least one of the following: The amplitude modulation information of the signal; Frequency modulation information of the signal; Phase modulation information of the signal; Mixed modulation information of the signal; Or, the information of the signal modulation frequency includes at least one of the following: Information on the backscatter link frequency of the signal; Different signals have information on the same backscatter link frequency; The impedance of the signal switches at a certain frequency.

4. The method according to claim 2 or 3, characterized in that: In the case where the first signal is a signal generated by modulation based on a second carrier signal generated by the answering device, and the second signal is a signal generated by modulation based on a third carrier signal generated by the answering device, the first information further includes: Information used to instruct the answering device to send at least two uplink signals simultaneously.

5. The method according to any one of claims 1 to 4, characterized in that The signal processing period is related to the distance between the answering device and other answering devices or the experienced movement rate of the answering device; Alternatively, the signal processing window is related to an experienced motion rate or backscatter link frequency of the transponding device.

6. The method according to any one of claims 1 to 5, characterized in that The method further comprises: The first communication device receives the first information or the second information from a second communication device.

7. The method according to any one of claims 1 to 5, characterized in that The method further comprises: The first communications device determines the second information based on preconfiguration information.

8. The method according to claim 7, characterized in that The pre-configuration information includes at least one piece of configuration information, and each piece of configuration information includes corresponding signal processing related information and answering device experienced motion rate information or backscatter link frequency information.

9. The method according to claim 7 or 8, characterized in that: The method further comprises: The first communication device obtains third information; The first communication device determines the second information based on preconfiguration information, including: The first communication device determines the second information based on preconfiguration information, the first information and the third information; The third information includes at least one of the following: Information about business scenarios; The response device's experienced motion rate information.

10. The method according to any one of claims 1 to 9, characterized in that After the first communication device demodulates or measures the first signal and the second signal according to the first information and the second information, the method further includes: The first communications device determines a difference in a measurement quantity of the first signal and the second signal.

11. The method according to claim 10, characterized in that After the first communications device determines a measurement difference between the first signal and the second signal, the method further includes one of the following: The first communication device reports a measurement difference between the first signal and the second signal to the second communication device; The first communication device determines a speed measurement result of the answering device based on a difference between a measurement amount of the first signal and a measurement amount of the second signal; The first communication device sends the measurement quantity difference between the first signal and the second signal determined by itself to other first communication devices.

12. The method according to claim 11, characterized in that The first communication device reports a measurement difference between the first signal and the second signal to the second communication device, including: The first communication device reports, based on the fourth information, a measurement difference between the first signal and the second signal to the second communication device; The fourth information at least includes reported transmission resource information.

13. The method according to claim 11, characterized in that The first communication device determines, based on a difference between a measurement amount of the first signal and a measurement amount of the second signal, a speed measurement result of the answering device, including one of the following: The first communication device determines the speed measurement result of the answering device based on the difference between the measured quantities of the first signal and the second signal determined by the first communication device; The first communication device determines the speed measurement result of the answering device based on the measurement quantity difference between the first signal and the second signal determined by itself and the measurement quantity difference between the first signal and the second signal received from other first communication devices.

14. The method according to claim 11 or 13, characterized in that After the first communication device determines the speed measurement result of the answering device, the method further includes: The first communication device reports the speed measurement result of the answering device to the second communication device.

15. The method according to claim 14, characterized in that The first communication device reports the speed measurement result of the answering device to the second communication device, including: The first communication device reports the speed measurement result of the answering device to the second communication device based on the fifth information; The fifth information at least includes reported transmission resource information.

16. The method according to any one of claims 1 to 15, characterized in that Before the first communication device receives the first signal and the second signal from the answering device, the method further comprises: The first communication device obtains capability information of the answering 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; Modulation mode support information.

17. A signal processing method, characterized in that: include: The second communication device sends first information to the answering device, where the first information is used to indicate signal transmission related information; The second communication device sends the first information or the second information to the first communication device, where the second information includes information about a signal processing cycle or information about a signal processing window.

18. The method according to claim 17, characterized in that The first information includes at least one of the following: Information on signal transmission resources; Information on signal modulation methods; Information on the signal modulation rate; Information about the signal modulation frequency.

19. The method according to claim 18, characterized in that The information of the signal transmission resource includes at least one of the following: Information about the time domain resources of the signal; Different signals have information of different time domain resources; Information on the frequency domain resources of the signal; Different signals have information about the same frequency domain resources; Or, the information of the signal modulation method includes at least one of the following: The amplitude modulation information of the signal; Frequency modulation information of the signal; Phase modulation information of the signal; Mixed modulation information of the signal; Or, the information of the signal modulation frequency includes at least one of the following: Information on the backscatter link frequency of the signal; Different signals have information on the same backscatter link frequency; The impedance of the signal switches at a certain frequency.

20. The method according to claim 18 or 19, characterized in that The first information also includes: Information used to instruct the answering device to send at least two uplink signals simultaneously.

21. The method according to any one of claims 17 to 20, characterized in that The signal processing period is related to the distance between the answering device and other answering devices or the experienced movement rate of the answering device; Alternatively, the signal processing window is related to an experienced motion rate or backscatter link frequency of the transponding device.

22. The method according to any one of claims 17 to 21, characterized in that The method further comprises: The second communication device transmits a first carrier signal to the answering device.

23. The method according to any one of claims 17 to 22, characterized in that The method further comprises: The second communication device sends third information to the first communication device; The third information includes at least one of the following: Information about business scenarios; The response device's experienced motion rate information.

24. The method according to any one of claims 17 to 23, characterized in that The method further comprises: The second communication device receives a measurement value difference between a first signal and a second signal reported by the first communication device or another first communication device; The second communication device determines a speed measurement result of the answering device based on a difference in measurement quantities between the first signal and the second signal.

25. The method according to claim 24, characterized in that Before the second communication device receives the measurement quantity difference between the first signal and the second signal reported by the first communication device or other first communication devices, the method further includes: The second communication device sends fourth information to the first communication device or other first communication devices, where the fourth information at least includes information about reported transmission resources.

26. The method according to any one of claims 17 to 23, characterized in that The method further comprises: The second communication device receives the speed measurement result of the answering device reported by the first communication device or other first communication devices.

27. The method according to claim 26, characterized in that Before the second communication device receives the speed measurement result of the answering device reported by the first communication device or other first communication devices, the method further includes: The second communication device sends fifth information to the first communication device or other first communication devices, where the fifth information at least includes information about reported transmission resources.

28. The method according to any one of claims 17 to 27, characterized in that Before the second communication device sends the first information to the answering device, the method further includes: The second communication device obtains capability information of the answering 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; Modulation mode support information.

29. A signal processing method, characterized in that: include: The answering device receives the first information; The answering device generates a first signal and a second signal according to the first information; The answering device sends the first signal and the second signal to the first communication device simultaneously; The first signal is an upper sideband signal of a backscattered signal generated by modulation of a first carrier signal, and the second signal is a lower sideband signal of the backscattered signal; Or, the first signal is a signal generated by modulating a second carrier signal generated by the answering device, and the second signal is a signal generated by modulating a third carrier signal generated by the answering device; The first information is used to indicate signal transmission related information.

30. The method according to claim 29, characterized in that The first information includes at least one of the following: Information on signal transmission resources; Information on signal modulation methods; Information on the signal modulation rate; Information about the signal modulation frequency.

31. The method according to claim 30, characterized in that The information of the signal transmission resource includes at least one of the following: Information about the time domain resources of the signal; Different signals have information of different time domain resources; Information on the frequency domain resources of the signal; Different signals have information about the same frequency domain resources; Or, the information of the signal modulation method includes at least one of the following: The amplitude modulation information of the signal; Frequency modulation information of the signal; Phase modulation information of the signal; Mixed modulation information of the signal; Or, the information of the signal modulation frequency includes at least one of the following: Information on the backscatter link frequency of the signal; Different signals have information on the same backscatter link frequency; The impedance of the signal switches at a certain frequency.

32. The method according to claim 30 or 31, characterized in that In the case where the first signal is a signal generated by modulation based on a second carrier signal generated by the answering device, and the second signal is a signal generated by modulation based on a third carrier signal generated by the answering device, the first information further includes: Information used to instruct the answering device to send at least two uplink signals simultaneously.

33. The method according to any one of claims 29 to 32, characterized in that Before the answering device receives the first information, the method further comprises: The answering device sends the capability information of the answering device to the first communication device or 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; Modulation mode support information.

34. The method according to claim 33, characterized in that The response device reports the capability information of the response device to the first communication device or the second communication device, including: The answering device reports the capability information of the answering device to the first communication device or the second communication device in at least one of the following situations: Sending a random access request; Send uplink control information; Receive query signaling; Receiving a paging signaling; Receive confirmation response signaling.

35. A signal processing device, characterized in that: include: A first receiving module, configured to receive a first signal and a second signal from a response device; A processing module, configured to demodulate or measure the first signal and the second signal according to the first information and the second information; The first signal is an upper sideband signal of a backscattered signal generated by modulation of a first carrier signal, and the second signal is a lower sideband signal of the backscattered signal; Or, the first signal is a signal generated by modulating a second carrier signal generated by the answering device, the second signal is a signal generated by modulating a third carrier signal generated by the answering device, and the first signal and the second signal are sent simultaneously; The first information is used to indicate information related to signal transmission, and the second information includes information about a signal processing cycle or information about a signal processing window.

36. A signal processing device, characterized in that: include: A first sending module, configured to send first information to the answering device, wherein the first information is used to indicate signal transmission related information; The second sending module is used to send the first information or the second information to the first communication device, where the second information includes information about a signal processing cycle or information about a signal processing window.

37. A signal processing device, characterized in that: include: A third receiving module, used for receiving first information; A generating module, configured to generate a first signal and a second signal according to the first information; A third sending module, configured to send the first signal and the second signal to a first communication device simultaneously; The first signal is an upper sideband signal of a backscattered signal generated by modulation of a first carrier signal, and the second signal is a lower sideband signal of the backscattered signal; Or, the first signal is a signal generated by modulating a second carrier signal generated by the answering device, and the second signal is a signal generated by modulating a third carrier signal generated by the answering device; The first information is used to indicate signal transmission related information.

38. A communication device, characterized in that: It comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the signal processing method as described in any one of claims 1 to 34 are implemented.

39. A readable storage medium, characterized in that: The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, the steps of the signal processing method as described in any one of claims 1 to 34 are implemented.

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