WO2024037446A1 - Procédé et appareil de traitement de signal et dispositif de communication - Google Patents

Procédé et appareil de traitement de signal et dispositif de communication Download PDF

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Publication number
WO2024037446A1
WO2024037446A1 PCT/CN2023/112530 CN2023112530W WO2024037446A1 WO 2024037446 A1 WO2024037446 A1 WO 2024037446A1 CN 2023112530 W CN2023112530 W CN 2023112530W WO 2024037446 A1 WO2024037446 A1 WO 2024037446A1
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Prior art keywords
signal
main signal
modulation
modulation block
main
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PCT/CN2023/112530
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English (en)
Chinese (zh)
Inventor
姜大洁
吴建明
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维沃移动通信有限公司
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Publication of WO2024037446A1 publication Critical patent/WO2024037446A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/22—Scatter propagation systems, e.g. ionospheric, tropospheric or meteor scatter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits

Definitions

  • the present application belongs to the field of communication technology, and specifically relates to a signal processing method, device and communication equipment.
  • Backscatter communication means that backscatter communication equipment uses radio frequency signals from other devices or the environment to perform signal modulation to transmit its own information.
  • the symbiotic backscatter communication signal includes a primary signal and a secondary signal, where the primary signal is sent by the transmitting end device, the backscatter communication device receives the primary signal and generates a secondary signal through modulation, and finally backscatters the secondary signal. Since the demodulation process is relatively complex, only one of the primary signal and the secondary signal carries data in the related technology. This application considers and proposes a new scenario, that is, a scenario in which the primary signal carries data and the secondary signal also carries data.
  • the receiving device cannot demodulate the data in the secondary signal, and when demodulating the primary signal
  • the signal data uses the Maximum-Likelihood (ML) detection algorithm, linear detection algorithm and detection algorithm based on Successive Interference Cancellation (SIC) to demodulate the main signal.
  • ML Maximum-Likelihood
  • SIC Successive Interference Cancellation
  • Embodiments of the present application provide a signal processing method, device and communication equipment, which can solve the problem of how to simply demodulate symbiotic backscattered communication signals.
  • the first aspect provides a signal processing method, including:
  • the sending end device modulates the main signal in the symbiotic backscattering communication signal to obtain the first main signal;
  • the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, and N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers.
  • the second aspect provides a signal processing method, including:
  • the backscatter communication device receives a first main signal, the first main signal includes M modulation blocks, each of the modulation blocks
  • the modulation block includes K first reference signals, 1 ⁇ K ⁇ N, N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers;
  • the backscatter communication device modulates M secondary signals according to the first main signal to obtain modulated secondary signals.
  • a signal processing method including:
  • the receiving end device acquires the first main signal, and performs coherent demodulation and decoding processing on the first main signal according to the first reference signal in the first main signal to obtain the data in the first main signal, so
  • the first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, N is the number of resource units included in each modulation block, and K is a positive Integers, N ⁇ 2, and M and N are positive integers;
  • the receiving end device acquires the symbiotic backscatter modulation block, performs coherent demodulation processing on the symbiotic backscatter modulation block according to the first primary signal, and obtains data in the secondary signal, and M is a positive integer.
  • a signal processing device applied to sending end equipment, including:
  • the first modulation module is used for the sending end device to modulate the main signal in the symbiotic backscatter communication signal to obtain the first main signal;
  • the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, and N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers.
  • a signal processing device for use in backscatter communication equipment, including:
  • the first receiving module is used to receive the first main signal.
  • the first main signal includes M modulation blocks.
  • Each of the modulation blocks includes K first reference signals, 1 ⁇ K ⁇ N, and N is each The number of resource units included in the modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers;
  • the second modulation module is used to modulate M secondary signals according to the first main signal to obtain modulated secondary signals.
  • a signal processing device applied to receiving end equipment, including:
  • the first processing module is used to obtain the first main signal, and perform coherent demodulation and decoding processing on the first main signal according to the first reference signal in the first main signal to obtain the first main signal.
  • the first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, N is the number of resource units included in each modulation block.
  • K is a positive integer, N ⁇ 2, and M and N are positive integers;
  • the second processing module is used to obtain the co-occurring backscattering modulation block, perform coherent demodulation processing on the co-occurring backscattering modulation block according to the first main signal, and obtain data in the secondary signal, and M is a positive integer.
  • a terminal in a seventh aspect, includes a processor and a memory.
  • the memory stores programs or instructions that can be run on the processor.
  • the program or instructions are executed by the processor, the following implementations are implemented: The steps of the method described in the first aspect, the second aspect or the third aspect.
  • a terminal including a processor and a communication interface, wherein the processor is used to modulate the main signal in the symbiotic backscatter communication signal to obtain the first main signal;
  • the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, and N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers;
  • the communication interface is used to receive a first main signal
  • the first main signal includes M modulation blocks
  • each of the modulation blocks includes K first reference signals, 1 ⁇ K ⁇ N
  • N is each The number of resource units included in the modulation block
  • K is a positive integer
  • N ⁇ 2 and M and N are positive integers
  • the processor is used to modulate M secondary signals according to the first main signal to obtain the modulated secondary signals. Signal.
  • the processor is configured for the receiving end device to obtain the first main signal, and perform coherent demodulation and decoding processing on the first main signal according to the first reference signal in the first main signal to obtain the first main signal.
  • the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, and N is the number of resource units included in each modulation block.
  • Quantity K is a positive integer, N ⁇ 2, and M and N are positive integers; obtain the co-occurring backscattering modulation block, and perform coherent demodulation processing on the co-occurring backscattering modulation block according to the first main signal to obtain The data in the secondary signal, and M is a positive integer.
  • a network side device in a ninth aspect, includes a processor and a memory.
  • the memory stores programs or instructions that can be run on the processor.
  • the program or instructions are executed by the processor.
  • a network side device including a processor and a communication interface, wherein the processor is used to modulate the main signal in the symbiotic backscatter communication signal to obtain the first main signal;
  • the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, and N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers;
  • the communication interface is used to receive a first main signal
  • the first main signal includes M modulation blocks
  • each of the modulation blocks includes K first reference signals, 1 ⁇ K ⁇ N
  • N is each The number of resource units included in the modulation block
  • K is a positive integer
  • N ⁇ 2 and M and N are positive integers
  • the processor is used to modulate M secondary signals according to the first main signal to obtain the modulated secondary signals. Signal.
  • the processor is configured for the receiving end device to obtain the first main signal, and perform coherent demodulation and decoding processing on the first main signal according to the first reference signal in the first main signal to obtain the first main signal.
  • the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, and N is the number of resource units included in each modulation block.
  • Quantity K is a positive integer, N ⁇ 2, and M and N are positive integers; obtain the co-occurring backscattering modulation block, and perform coherent demodulation processing on the co-occurring backscattering modulation block according to the first main signal to obtain The data in the secondary signal, and M is a positive integer.
  • a signal processing system including: a transmitting end device, a backscattering communication device, and a receiving end device.
  • the transmitting end device can be used to perform the steps of the method described in the first aspect, wherein
  • the backscatter communication device may be used to perform the steps of the method as described in the second aspect, and the receiving end device may be used to perform the steps of the method as described in the third aspect.
  • a readable storage medium In a twelfth aspect, a readable storage medium is provided. Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method are implemented. The steps of the method as described in the second aspect, or the steps of implementing the method as described in the third aspect.
  • a chip in a thirteenth aspect, includes a processor and a communication interface.
  • the communication interface is coupled to the processor.
  • the processor is used to run programs or instructions to implement the method described in the first aspect. method, or implement the method as described in the second aspect, or implement the method as described in the third aspect.
  • a computer program/program product is provided, the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement as described in the first aspect method, or implement the method described in the second aspect, or implement the method described in the third aspect.
  • the sending end device inserts K first reference signals into each modulation block of the main signal to obtain the first main signal, so that the receiving end device can simply and effectively modify the first reference signal based on the first reference signal.
  • a primary signal is coherently demodulated and decoded, and then the secondary signal can be demodulated according to the demodulated data of the first primary signal, thereby achieving simple demodulation of the primary signal and the symbiotic backscattering communication signal.
  • the purpose of the secondary signal is
  • Figure 1 shows a structural diagram of a communication system applicable to the embodiment of the present application
  • FIG. 1 shows the sending and receiving scenarios of Passive IoT
  • Figure 3 shows a schematic diagram of the primary signal and secondary signal in Passive IoT-related symbiotic backscattering
  • Figure 4 shows a schematic diagram of Passive IoT symbiotic backscattering using beam forming
  • FIG. 5 shows one of the schematic flow diagrams of the signal processing method according to the embodiment of the present application.
  • Figure 6 shows a schematic diagram of the modulation of the main signal and the secondary signal in the time domain based on a single carrier in this application;
  • Figure 7 shows a schematic diagram of the modulation of the main signal and the secondary signal in the frequency domain based on OFDM waveforms in this application;
  • Figure 8 shows a schematic diagram of the design of the first reference signal in the main signal in this application.
  • Figure 9 shows a schematic diagram of the modulation of the primary signal (including the first reference signal) and the secondary signal in the time domain based on a single carrier in this application;
  • Figure 10 shows the modulation diagram of the main signal (including the first reference signal) in the frequency domain based on the OFDM waveform in this application;
  • Figure 11 shows the second schematic flow chart of the signal processing method according to the embodiment of the present application.
  • Figure 12 shows a schematic design diagram of the second reference signal in the secondary signal according to the embodiment of the present application.
  • Figure 13 shows the third schematic flow chart of the signal processing method according to the embodiment of the present application.
  • Figure 14 shows a schematic design diagram for the first reference signal and the second reference signal in the embodiment of the present application
  • Figure 15 shows a schematic diagram of layered demodulation of the receiving end device in the embodiment of the present application.
  • Figure 16 shows one of the module schematic diagrams of the signal processing device according to the embodiment of the present application.
  • Figure 17 shows the second module schematic diagram of the signal processing device according to the embodiment of the present application.
  • Figure 18 shows the third module schematic diagram of the signal processing device according to the embodiment of the present application.
  • Figure 19 shows a structural block diagram of the communication device according to the embodiment of the present application.
  • Figure 20 shows a structural block diagram of a terminal according to an embodiment of the present application.
  • Figure 21 shows a structural block diagram of the network side device according to the embodiment of the present application.
  • first, second, etc. in the description and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and that "first" and “second” are distinguished objects It is usually one type, and the number of objects is not limited.
  • the first object can be one or multiple.
  • “and/or” in the description and claims indicates at least one of the connected objects, and the character “/" generally indicates that the related objects are in an "or” relationship.
  • LTE Long Term Evolution
  • LTE-Advanced, LTE-A Long Term Evolution
  • LTE-A Long Term Evolution
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single-carrier Frequency Division Multiple Access
  • NR New Radio
  • FIG. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable.
  • the wireless communication system includes a terminal 11 and a network side device 12.
  • the terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a palmtop computer, a netbook, or a super mobile personal computer.
  • Tablet Personal Computer Tablet Personal Computer
  • laptop computer laptop computer
  • PDA Personal Digital Assistant
  • PDA Personal Digital Assistant
  • UMPC ultra-mobile personal computer
  • UMPC mobile Internet device
  • MID mobile Internet Device
  • AR augmented reality
  • VR virtual reality
  • robots wearable devices
  • WUE Vehicle User Equipment
  • PUE Pedestrian User Equipment
  • smart home home equipment with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.
  • game consoles personal computers (personal computer, PC), teller machine or 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) bracelets, smart anklets, etc.), smart wristbands, smart clothing, etc.
  • the network side device 12 may include an access network device or a core network device, where the access network device may also be called a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or a wireless access network unit.
  • Access network equipment may include a base station, a Wireless Local Area Network (WLAN) access point or a Wireless Local Area Network (WiFi) node, etc.
  • the base station may be called a Node B or an Evolved Node B (Evolved Node B).
  • eNB access point
  • BTS Base Transceiver Station
  • BSS Basic Service Set
  • ESS Extended Service Set
  • home B node home evolved B node
  • TRP Transmitting Receiving Point
  • the base station is not limited to specific technical terms, and needs to be explained
  • 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.
  • Backscatter communication means that backscatter communication devices (such as tags) use radio frequency signals from other devices or the environment to perform signal modulation to transmit their own information.
  • Backscatter communication equipment controls the reflection coefficient ⁇ 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 characterized as:
  • Z 0 is the antenna characteristic impedance
  • Z 1 is the load impedance.
  • RFID Radio Frequency Identification
  • IoT Internet of Things
  • the forward link budget is defined as the amount of power received by the backscatter transmitter
  • the backscatter link budget is the amount of power received by the backscatter receiver
  • Backscatter communication systems can be divided into three main types: Monostatic Backscatter Communication System (MBCS), Bistatic Backscatter Communication System (BBCS) and ambient backscatter Communication system (Ambient Backscatter Communication System, ABCS).
  • MBCS Monostatic Backscatter Communication System
  • BBCS Bistatic Backscatter Communication System
  • ABCS ambient backscatter Communication system
  • bistatic backscatter communication is generally considered in Passive IoT signal transmission scenarios. If you consider the typical nodes (NR Node B, gNB) and user equipment (User Equipment, UE) in traditional cellular networks, and introduce passive IoT devices (i.e., Tags) into the cellular network, you can mainly consider the following two scenarios , that is, UE-assisted passive IoT scenario.
  • NR Node B NR Node B
  • UE User Equipment
  • Scenario-1 gNB sends the primary signal (Primary Signal), x[n]. While receiving the primary signal, the UE also receives Reflect signal to Tag.
  • the Tag reflection signal is modulated by the main signal received by the Tag and the secondary signal (Secondary Signal) B[m] sent by itself.
  • Scenario-2 is that the UE sends the main signal, x[n], and the gNB receives the main signal and the Tag reflection signal at the same time.
  • the Tag reflection signal is modulated by the main signal received by the Tag and the secondary signal B[m] sent by itself.
  • the transmitting end Tx can be a gNB or a UE
  • the receiving end Rx can be a corresponding UE or gNB.
  • Tx is unified as gNB
  • Rx is unified as UE for explanation.
  • h 2 is the channel response from gNB to UE
  • h 3 is the channel response from gNB reflected to UE through Tag
  • w[n] is Additive White Gaussian Noise (AWGN) noise
  • n 0,1, ..., NM-1
  • m 0,1,...,M-1
  • M is the number of symbols of the secondary signal
  • N is the number of primary signals for each modulated secondary signal, as shown in Figure 3.
  • AWGN Additive White Gaussian Noise
  • the main signal x[n] can be transmitted through any waveform such as CDMA, TDMA, Orthogonal Frequency Division Multiplexing (OFDM), etc.
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • OFDM Orthogonal Frequency Division Multiplexing
  • the UE receiving end needs to detect the primary signal x[n] and the secondary signal B[m].
  • the UE receiving end generally uses coherent reception algorithms, which can be divided into the following types, namely, Maximum-Likelihood (ML) detection algorithm, Linear Detector (Linear Detector) and Successive Interference Cancellation (SIC)-based detection algorithm.
  • ML Maximum-Likelihood
  • Linear Detector Linear Detector
  • SIC Successive Interference Cancellation
  • gNB can use the beamforming method to realize Passive IoT signal transmission, as shown in Figure 4.
  • y[n] can is approximated as y[n] ⁇ h 3 B[m]x[n]+w[n];
  • the signal processing method in the embodiment of the present application can be applied to the above-mentioned Scenario-1 and Scenario-2.
  • Scenario-1 will be used as an example for description below, and the specific description of Scenario-2 will not be repeated.
  • this application mainly describes centralized symbiotic backscatter communication, but the technology in this application can be extended to other scenarios, such as separated symbiotic backscatter communication.
  • this embodiment of the present application provides a signal processing method, including:
  • Step 501 The sending end device modulates the main signal in the symbiotic backscattering communication signal to obtain the first main signal. Number;
  • the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, and N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers.
  • each first reference signal corresponds to a resource unit in the modulation block.
  • Each of the above modulation blocks corresponds to a secondary signal, and M secondary signals can be modulated through the above M modulation blocks.
  • the above-mentioned sending end device may be a base station or a terminal.
  • the first reference signal is used to recover the phase flip caused by the secondary signal.
  • the first reference signal is also used to predict the amplitude and phase information of the channel.
  • the sending end device inserts K first reference signals into each modulation block of the main signal to obtain the first main signal, so that the receiving end device can simply and effectively modify the first reference signal based on the first reference signal.
  • the main signal is coherently demodulated and decoded, and then the secondary signal can be demodulated according to the data of the demodulated first main signal, thereby achieving simple demodulation of the primary signal and the secondary signal in the symbiotic backscatter communication signal.
  • the purpose of the signal is coherently demodulated and decoded, and then the secondary signal can be demodulated according to the data of the demodulated first main signal, thereby achieving simple demodulation of the primary signal and the secondary signal in the symbiotic backscatter communication signal.
  • the method also includes:
  • the sending end device sends the first main signal.
  • the symbiotic backscatter communication signal includes a primary signal and a secondary signal.
  • the primary signal x[n] carries modulation symbols based on Quadrature Amplitude Modulation (QAM) through a single carrier or multi-carrier transmission waveform.
  • the secondary signal B[m] carries modulation symbols based on Binary Phase Shift Keying (BPSK) through a single carrier or multi-carrier transmission waveform.
  • QAM Quadrature Amplitude Modulation
  • BPSK Binary Phase Shift Keying
  • the secondary signal can also carry QAM-based modulation symbols, but considering the complexity limit allowed by Tag (or Backscatter Device) in Passive IoT applications, BPSK modulation is mainly used in this application. method to proceed. However, this application can target all modulation methods, such as binary amplitude keying (OOK), QAM, differential amplitude keying (Differential Amplitude Shift Keying, DASK), differential phase shift keying (Differential Phase Shift) Keying (DPSK), Differential Amplitude and Phase-Shift Keying (DAPSK), etc.
  • OOK binary amplitude keying
  • QAM differential amplitude keying
  • DASK differential amplitude keying
  • DPSK differential Phase shift keying
  • DAPSK Differential Amplitude and Phase-Shift Keying
  • the above-mentioned modulation block may be a modulation block corresponding to the time domain signal of the main signal, or may be a modulation block corresponding to the frequency domain signal of the main signal.
  • Figure 6 shows a schematic diagram of the modulation of the primary signal and secondary signal in the time domain based on a single carrier.
  • the main signal x[n] is composed of a modulation block of length N.
  • Each modulation block is composed of a minimum communication transmission time domain resource unit (can also be described as a resource element), such as a single carrier Pulse. That is, each modulation block includes N resource units.
  • the main signal x[n] is sent from the transmitting end device (here, the base station is taken as an example), is received by the Tag, and modulated by BPSK to generate a secondary signal waveform, and finally backscattered.
  • the size of the modulation block N can be notified to the UE by the gNB through L1 signaling or Media Access Control Element (MAC Control Element, MAC CE) signaling, or it can be carried out through Radio Resource Control (Radio Resource Control, RRC) configuration.
  • MAC Control Element Media Access Control Element, MAC CE
  • RRC Radio Resource Control
  • the secondary signal B[m] is modulated on the received signal h 1 x(t) sent from gNB and received by Tag, where , h 1 is the channel response (Channel Response) from gNB to Tag.
  • h 1 is the channel response (Channel Response) from gNB to Tag.
  • the received signal h 1 x(t) is used as a communication propagation carrier to transmit the secondary signal B[m]. Therefore, the single-carrier backscattered signal of the secondary signal can be expressed as:
  • p T (t) is the pulse waveform of the backscattered signal
  • the signal waveform of x (t) can be a single carrier signal waveform or a multi-carrier signal waveform (such as OFDM waveform).
  • Tag can use a multi-carrier waveform (eg, OFDM waveform) to perform BPSK modulation and backscatter on the secondary signal B[m].
  • a multi-carrier waveform eg, OFDM waveform
  • the advantage of using the OFDM waveform to perform BPSK modulation and backscattering on the secondary signal B[m] is that it can effectively combat the multipath fading effect, thereby improving the UE's reception performance of the backscattered signal.
  • Figure 7 shows the modulation diagram of the main signal and the secondary signal in the frequency domain based on the OFDM carrier.
  • the received main signal is a time domain signal with an OFDM waveform.
  • Tag receives the OFDM time domain signal h 1 x(t) and converts the time domain signal into a frequency domain signal.
  • the converted received frequency domain signal is expressed as:
  • the frequency domain main signal X[q] is divided by modulation blocks of length N.
  • Each modulation block is composed of minimum communication transmission frequency domain resource elements, such as OFDM subcarriers (OFDM Carrier).
  • Tag performs BPSK modulation on the main frequency domain signal X[q] and generates a secondary signal frequency domain signal waveform, which can be expressed as:
  • P T [q] is the waveform of the backscattered signal in the frequency domain.
  • Tag converts the frequency domain signal X B [q] into a time domain signal x B [t] through the IDFT operation, which is expressed as:
  • the OFDM time domain signal x B (t) is backscattered by the Tag to the UE.
  • the demodulation of the main signal by the UE can be solved by the coherent reception algorithm described in the background art, such as ML detection algorithm, linear detection algorithm and SIC-based detection algorithm, its complexity is difficult to be satisfied in the system of related technologies. . Therefore, a more appropriate method is to effectively and simply solve the data demodulation problem of symbiotic backscatter communication through a certain degree of reference signal standardization design.
  • the sending end device modulates the main signal in the symbiotic backscatter communication signal to obtain the first main signal, including:
  • K first reference signals are inserted into each modulation block corresponding to the time domain signal to obtain the first main signal.
  • the sending end device modulates the main signal in the symbiotic backscattering communication signal to obtain the first main signal, including:
  • K first reference signals are inserted into each modulation block corresponding to the frequency domain signal to obtain the first main signal.
  • the K reference signals in each modulation block correspond to one reference sequence, or the K reference signals in the first main signal K*M reference signals correspond to a reference sequence.
  • each modulation block includes two reference signals
  • the reference sequences corresponding to the two reference signals are 1, -1 or -1, 1, etc.
  • each modulation block includes 2 reference signals, and M is 3, then the reference sequences corresponding to K*M reference signals may be 1, -1, 1, -1, 1, -1.
  • the K first reference signals are located in the first N resource units of the modulation block, and each of the first reference signals corresponds to one resource unit.
  • the K first reference signals are placed at the front of each modulation block, so that the receiving end device can first obtain the first reference signal in each modulation block, and then use the first reference signal to analyze the subsequent ones in the modulation block.
  • the data is demodulated.
  • the K first reference signals can also be placed at any position of each straightening block, such as the last position, or one or more positions in the middle, etc. The selection of positions can be realized according to specific needs. This application will No specific limitation is made.
  • the positions of the K first reference signals may be continuous or discontinuous.
  • the method in the embodiment of this application also includes:
  • At least one of N and K is determined according to L1 signaling, media access control unit MAC CE signaling or radio resource control RRC configuration information.
  • the reference signal related to the primary signal is used to recover the phase flip caused by the secondary signal and predict the amplitude and phase information of the channel at the same time. Since the secondary signal is carried on the received primary signal and modulated by a time domain or frequency domain modulation block of length N, each modulation block needs to be allocated at least one resource element (e.g., a pulse of a single carrier) as a reference signal, that is, 1 ⁇ K ⁇ N, where K is the number of reference signal resource elements allocated to each modulation block.
  • a resource element e.g., a pulse of a single carrier
  • each time domain modulation block of length N needs to be allocated at least one resource element as a reference signal, that is, 1 ⁇ K ⁇ N.
  • each frequency domain modulation block of length N needs to be allocated at least one resource element (such as OFDM subcarrier) as a reference signal, that is, 1 ⁇ K ⁇ N.
  • the size of the modulation block N and the number of resource elements K of the reference signal in each modulation block can be notified through L1 signaling or MAC CE signaling, or configured through RRC.
  • the reference signal in each modulation block The reference sequence can be configured, and the reference sequence configuration can be performed through RRC.
  • the BPSK phase inversion factor of each modulation block unit must be considered in channel estimation. Therefore, the UE needs to perform channel estimation in units of modulation blocks, and channel cooperative estimation cannot be performed between modulation blocks.
  • the execution of channel estimation can be simply based on the channel estimation of LS, and the overall channel includes gNB-Tag-UE channel and BPSK modulation phase inversion. Since the modulation block channel collaborative estimation cannot be performed, compared with the minimum mean square error (MMSE) channel collaborative estimation, the signal-to-noise ratio (Signal to Noise Ratio) of the least squares (Least Square, LS) channel estimation, SNR) degradation is about 4dB.
  • MMSE minimum mean square error
  • the secondary signal is modulated by the received primary signal.
  • the primary signal after inserting the reference signal is sent from the gNB, received by the Tag, BPSK modulated and generates the secondary signal waveform, and finally backscattered. Therefore, the waveform used in symbiotic backscatter communication is a single-carrier signal waveform.
  • the carrier signal waveform of the main signal can be a single carrier time domain signal or a multi-carrier time domain signal.
  • Figure 9 shows the modulation process of the main signal (including the first reference signal) and the secondary signal in the time domain based on the single carrier signal waveform. That is, the solution shown in Figure 9 corresponds to the first optional implementation method mentioned above.
  • gNB sends the primary signal x[n], which is received by Tag, and performs BPSK modulation on the secondary signal data symbols and generates the secondary signal single carrier signal waveform, and finally backscatters.
  • Tag does not need to be processed by Discrete Fourier Transform (DFT) and Inverse Discrete Fourier Transform (IDFT). Modulation performs time domain processing directly on the received main signal, so the complexity of Tag is relatively low.
  • DFT Discrete Fourier Transform
  • IDFT Inverse Discrete Fourier Transform
  • the symbiotic backscattered multi-carrier signal y(t) received by the UE receiving end is expressed as:
  • the single-carrier backscatter signal of the sub-signal is defined in Formula 1, h 2 is the channel response from gNB to UE, h 3 is the channel response from Tag to UE, and w[n] is the AWGN noise.
  • the symbiotic backscattered multi-carrier signal y(t) received by the UE receiving end is approximated as:
  • Figure 10 shows the main signal (including the first reference signal) and the secondary signal in the frequency domain based on the multi-carrier signal waveform. modulation process.
  • gNB sends the main signal x[n], which is received by Tag.
  • Tag first performs a DFT operation on the received signal h 1 x(t), so that the time domain signal is converted into a frequency domain signal X[q]. Then the secondary signal data symbols are subjected to BPSK modulation in the frequency domain and the secondary signal multi-carrier signal waveform is generated, and the IDFT operation is performed, and finally backscattered.
  • Tag modulates the multi-carrier signal waveform of secondary signal data symbols mainly to combat the multipath fading effect.
  • Tags For symbiotic backscattered multi-carrier signals (such as OFDM signals), Tags need to be processed by DFT and IDFT, so the complexity of Tags is relatively high.
  • the processing time delay of DFT and IDFT is at least one OFDM symbol length, this symbiotic backscattering method can be regarded as a non-instantaneous symbiotic backscattering system.
  • x B (t) is the single-carrier backscatter signal of the secondary signal defined in Equation 4
  • w[n] is the AWGN noise
  • T Proc is the total processing time of the DFT and IDFT of the received signal at the Tag receiving end.
  • the symbiotic backscattered multi-carrier signal y(t) received by the UE receiving end is approximated as: y(t) ⁇ h 3 x B (t)+w(t);
  • Tag can control the backscattering time when backscattering the secondary signal, such as Tag
  • the secondary signal is backscattered after ⁇ NM time after receiving the main signal, that is, during ⁇ OFDM symbols, Tag performs DFT operation on the received main signal, modulation of the secondary signal, IDFT operation, and finally backscattering.
  • the OFDM symbol length NM and the number of OFDM symbols ⁇ can be configured in advance, and the UE receiving end can know in advance the total modulation time of the secondary signal by the Tag, ⁇ NM. Therefore, the UE receiving end can effectively eliminate the x[n- ⁇ NM] term before detecting x[n] and B[m].
  • the demodulation symbols of the main signal by the UE can be expressed as:
  • n 2,3,...,N.
  • the UE is able to demodulate the main signal data symbols
  • the channel decoder (Channel Decoder) is used to decode the bit information of the main signal and obtain the main signal data bit information.
  • co-occurring backscattered single-carrier signals or co-occurring backscattered multi-carrier signals
  • gNB uses beamforming antennas to send main signals, or gNB-Tag, gNB-UE, Tag-UE link channels It is a multipath channel.
  • the UE can demodulate the main signal data symbols through the same demodulation method as above. Specifically, for the co-occurring backscattered single-carrier signal, the UE demodulates the main signal data symbols in the time domain, and for the co-occurring backscattered multi-carrier signal, the UE demodulates the main signal data symbols in the frequency domain. No detailed explanation will be given here.
  • a first reference signal in units of secondary signal modulation blocks is inserted into the time domain signal or frequency domain signal of the main signal, so that the receiving end device can simply and effectively modify the first reference signal based on the first reference signal.
  • the main signal is coherently demodulated and decoded, and then the secondary signal can be demodulated according to the data of the demodulated first main signal, thereby achieving simple demodulation of the primary signal and the secondary signal in the symbiotic backscatter communication signal.
  • the purpose of the signal is inserted into the time domain signal or frequency domain signal of the main signal, so that the receiving end device can simply and effectively modify the first reference signal based on the first reference signal.
  • the main signal is coherently demodulated and decoded, and then the secondary signal can be demodulated according to the data of the demodulated first main signal, thereby achieving simple demodulation of the primary signal and the secondary signal in the symbiotic backscatter communication signal. The purpose of the signal.
  • the sending end device sends the first main signal, including:
  • each group of transmission configuration information including carrier configuration information and antenna configuration information corresponding to the carrier configuration information;
  • the first main signal is sent according to the first set of transmission configuration information.
  • the first set of transmission configuration information includes: first single carrier configuration information or first multi-carrier configuration information of the sending end device, second single carrier configuration information of the backscattering communication device, and all the information of the sending end device. configure information to the antenna;
  • the first set of transmission configuration information includes: first single-carrier configuration information or first multi-carrier configuration information of the transmitting end device, second multi-carrier configuration information of the backscattering communication device, and beamforming of the transmitting end device. Antenna configuration information.
  • the sending device selects the first set of transmission configuration information based on the carrier configuration information used by the sending device and the carrier configuration information used by the backscatter communication device from at least one set of configuration information. That is, the omnidirectional antenna configuration information of the transmitting end device corresponding to the carrier configuration information used by the transmitting end device and the carrier configuration information used by the backscattering communication device is selected from the above at least one set of configuration information.
  • the method in the embodiment of this application also includes:
  • the at least one set of transmission configuration information is updated according to the measurement quantity reporting information or the channel change information.
  • the transmission configuration information is associated with at least one of the following:
  • the at least one set of transmission configuration information may be configured by the base station according to the above content.
  • gNB can have an omnidirectional antenna or a beamforming antenna to transmit the main signal x[n].
  • gNB can carry the main signal modulation symbol x[n] through a single carrier or multiple carriers, and Tag can also carry the secondary signal modulation symbol B[m] through a single carrier or multiple carriers.
  • QoS Quality-of-Service
  • MBR Maximum transmission rate
  • RRC configuration includes: configuration of QoS parameters, configuration of transmitting antenna, and configuration of gNB (or UE) and Tag carrier bearer. Among them, the configuration of the transmitting antenna and the carrier bearer configuration are determined according to QoS requirements.
  • the relationship between the carrier bearer configuration of gNB (or UE) and the carrier bearer configuration of Tag is shown in Table 1. As can be seen from Table 1, there are not many restrictions on the combination of carrier bearer configurations, but from an implementation perspective, the consistency of the carrier bearer configuration relationships is different.
  • the tag's carrier bearer configuration can depend on the single carrier bearer (i.e., carrier bearer option one) or on multi-carrier bearer (i.e., carrier bearer option two).
  • the tag's carrier bearer configuration can rely on either a single carrier bearer (ie, carrier bearer option three) or multiple carrier bearers (ie, carrier bearer option four).
  • ⁇ means that the carrier bearer configuration relationship between gNB (or UE) and Tag is the most consistent.
  • ⁇ means that the carrier bearer configuration relationship between gNB (or UE) and Tag can be adopted, but it is not the optimal pairing.
  • Each carrier carrying option has certain characteristics. When the tag's allowed capability is relatively low, the tag can only choose carrier bearer option one or carrier bearer option three, depending on the carrier bearer configured by the gNB (or UE) for the main signal. However, when the tag's allowed capability is relatively high, the tag can choose carrier bearer option 2 or carrier bearer option 4.
  • the gNB or UE as the receiving end needs to be equipped with a highly complex equalizer to demodulate the co-occurring backscatter signals of the multipath channel. This situation generally applies to QoS services with relatively low requirements.
  • the gNB or UE as the receiving end only needs to be equipped with a single-order equalizer (Single Tap Equalization) to counteract the characteristics of multipath channels through frequency domain processing methods to demodulate multiple The co-occurring backscatter signal of the path channel to provide overall co-occurring backscatter communication performance. This situation is generally for QoS services with relatively high requirements.
  • gNB antenna configuration The relationship between gNB antenna configuration and carrier bearer options is shown in Table 2.
  • Table 2 there are certain restrictions on transmitting antenna configurations for different carrier bearer options. For example, when selecting carrier bearer option one and carrier bearer option three, the transmitting antenna configuration can select omnidirectional antenna transmission. However, when selecting carrier bearer option two and carrier bearer option four, the transmitting antenna configuration is best to choose beamforming antenna transmission. This is because, in the case of omnidirectional antenna transmission, the gNB (or UE) receiving end must cancel the signal on the gNB-UE based on the previously demodulated main signal before demodulating the symbiotic backscattered communication signal. This requires relatively high reception complexity for the gNB (or UE) receiving end.
  • the gNB (or UE) transmitter is best to configure beamforming to transmit the main signal in order to reduce the demodulation complexity of the receiver and thereby improve symbiotic backscatter Overall performance of communications. This situation is generally for QoS services with relatively high requirements.
  • ⁇ means that the transmission combination selected by gNB (or UE) is the most suitable. 0 means that the transmission combination selected by gNB (or UE) is more suitable. ⁇ means that the transmission combination selected by gNB (or UE) can be adopted, but it is not very effective (for example, from the perspective of demodulation complexity at the receiving end, special design methods need to be used).
  • gNB-Tag-UE changes and cannot meet the QoS requirements of symbiotic backscatter communication
  • the transmission combination also needs to be changed.
  • gNB The paired Tag and UE will be selected by positioning the Tag and UE.
  • the ideal pairing is to keep the distance between Tag and UE as short as possible, because this can increase the overall channel gain between gNB-Tag-UE.
  • Symbiotic backscatter communication adaptive technology can be considered as a technology that switches transmission combinations according to changes in link channels.
  • the gNB may configure more than two transmission combinations according to service QoS requirements and Tag and/or UE capabilities. Based on the service QoS requirements, gNB selects a suitable transmission combination among the configured transmission combinations. During the service transmission process, gNB can dynamically schedule transmission combinations through L1 signaling or Medium Access Control (MAC) signaling based on the UE's measurement report (Measurement Report) information, and can also be reconfigured through RRC Staticly reconfigure the transmission combination to minimize the complexity of Tag and/or UE while meeting service QoS requirements.
  • MAC Medium Access Control
  • the transmission waveforms of the primary signal and the secondary signal can be effectively and adaptively adjusted according to the service QoS requirements and the mobility of the UE.
  • the sending end device inserts K first reference signals into each modulation block of the main signal to obtain the first main signal, so that the receiving end device can simply and effectively process the signal based on the first reference signal.
  • the first primary signal is subjected to coherent demodulation and decoding processing, and then the secondary signal can be demodulated according to the data of the demodulated first primary signal, thereby achieving simple demodulation of the primary signal in the symbiotic backscatter communication signal.
  • signal and secondary signal and can effectively adaptively adjust the transmission waveforms of the primary signal and secondary signal.
  • this embodiment of the present application also provides a signal processing method, including:
  • Step 1101 The backscatter communication device receives the first main signal.
  • the first main signal includes M modulation blocks.
  • Each of the modulation blocks includes K first reference signals, 1 ⁇ K ⁇ N, and N is each The number of resource units included in each of the modulation blocks, K is a positive integer, N ⁇ 2, and M and N are positive integers;
  • Step 1102 The backscatter communication device modulates M secondary signals according to the first primary signal to obtain modulated secondary signals.
  • the above-mentioned backscatter communication device may be specifically a Tag.
  • the method further includes: the backscatter communication device sending the modulated secondary signal.
  • the backscatter communication device backscatters the modulated secondary signal.
  • the secondary signal is modulated by the first main signal including the first reference signal, and the modulated secondary signal is obtained and backscattered, so that the receiving end device can simply and effectively process the signal according to the first reference signal.
  • the first primary signal is subjected to coherent demodulation and decoding processing, and then the secondary signal can be demodulated according to the data of the demodulated first primary signal, thereby achieving simple demodulation of the primary signal in the symbiotic backscatter communication signal. Purpose of signals and sub-signals.
  • the M secondary signals include a second reference signal, or include signals with the same length and phase. The opposite of the two second reference signals.
  • the number of resource units corresponding to the second reference signal is the same as the number of resource units corresponding to the P modulation blocks, 1 ⁇ P ⁇ M/2.
  • the modulation block in the first main signal is a modulation block corresponding to the time domain signal of the main signal
  • the backscatter communication device modulates M secondary signals according to the first main signal to obtain modulated secondary signals, including:
  • the M secondary signals are modulated to obtain modulated secondary signals.
  • the modulation block in the first main signal is a modulation block corresponding to the frequency domain signal of the main signal
  • the backscatter communication device modulates M secondary signals according to the first main signal to obtain modulated secondary signals, including:
  • the primary signal is subjected to an inverse discrete Fourier transform (IDFT) process to obtain a modulated secondary signal.
  • IDFT inverse discrete Fourier transform
  • the one second reference signal corresponds to one reference sequence, or the two second reference signals correspond to one reference sequence.
  • the above-mentioned one second reference signal or two second reference signals are located in the first P*N resource elements of the M secondary signals.
  • the demodulated secondary signal also needs to be equipped with a corresponding reference signal (the above-mentioned second reference signal).
  • a corresponding reference signal the above-mentioned second reference signal.
  • Tag modulates each secondary signal data symbol on each modulation block, and then Tag backscatters the secondary signal with a length of M transmission blocks (modulation blocks) to the UE.
  • M transmission blocks modulation blocks
  • two second reference signals need to be equipped.
  • the length of each second reference signal is the same as the length corresponding to the P modulation blocks, where P is Integer, 1 ⁇ P ⁇ M/2.
  • the modulated signal may be a BPSK signal
  • the modulated signal may be a BPSK signal
  • Tag modulates the backscattered data symbol B[m], as shown in Figure 12.
  • each second reference signal may additionally have a reference sequence, and the reference sequence configuration may be performed through RRC.
  • the channel link phase for the Tag-UE must be guaranteed to be opposite.
  • the estimated main signal and the copied main signal symbol is different.
  • the former has a higher bit error rate, while the latter usually has a very low bit error rate due to the channel coding and decoding gain.
  • the weighted average co-occurring backscatter modulation block signal can be approximated as:
  • the UE can simply obtain the following signal:
  • the UE can simply obtain the following signal:
  • the UE can obtain the channel responses h 2 and h 3 .
  • the channel coding gain can be improved by reducing the code rate (ie, Code Rate) of the main signal data symbols.
  • the demodulation performance of secondary signal data symbols can be improved by selecting a larger modulation block N value to increase the processing gain (Processing Gain).
  • the secondary signal data modulation method described in this application only needs to be performed through BPSK. In order to ensure coherent detection, secondary signal data transmission needs to be completed by sending a reference signal. Optionally, if the secondary signal data modulation uses DASK, DPSK, or DAPSK differential modulation methods, the secondary system can complete signal demodulation without adding a second reference signal.
  • the secondary signal is modulated by the first main signal including the first reference signal, and the modulated secondary signal is obtained and backscattered, so that the receiving end device can simply and effectively process the signal according to the first reference signal.
  • the first primary signal is subjected to coherent demodulation and decoding processing, and then the secondary signal can be demodulated according to the data of the demodulated first primary signal, thereby achieving simple demodulation of the primary signal in the symbiotic backscatter communication signal. Purpose of signals and sub-signals.
  • this embodiment of the present application also provides a signal processing method, including:
  • Step 1301 The receiving end device acquires the first main signal, and performs coherent demodulation and decoding on the first main signal according to the first reference signal in the first main signal to obtain the first main signal.
  • the first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers.
  • the receiving end device may be a terminal or a base station.
  • the sending end device is a base station
  • the receiving end device is a terminal.
  • the sending end device is a terminal
  • the receiving end device is base station.
  • Step 1302 The receiving end device obtains the symbiotic backscattering modulation block, performs coherent demodulation processing on the symbiotic backscattering modulation block according to the first primary signal, and obtains data in the secondary signal, and M is a positive integer. .
  • the co-occurring backscatter modulation block includes a modulated secondary signal and a noise signal.
  • the first main signal can be acquired first and then the symbiotic backscattering modulation block can be acquired, or the symbiotic backscattering modulation block can be acquired first and then the first main signal can be acquired, or the first main signal can be acquired at the same time.
  • Main signal and co-occurring backscatter modulation blocks when processing the signal, the first main signal is first demodulated, and then the symbiotic backscattering modulation block is demodulated according to the demodulated first main signal.
  • the receiving end device can simply and effectively perform coherent demodulation and decoding of the first main signal based on the first reference signal in the first main signal, and can further perform coherent demodulation and decoding of the demodulated first main signal based on the first reference signal in the first main signal.
  • the data demodulates the secondary signal, thereby achieving the purpose of simply demodulating the primary signal and secondary signal in the symbiotic backscatter communication signal.
  • perform coherent demodulation and decoding on the first main signal according to the first reference signal in the first main signal to obtain data in the main signal including:
  • the channel decoder performs bit decoding processing on the first main signal estimated value to obtain the data in the first main signal (ie, the main signal data bit information ).
  • the modulated secondary signal is obtained by modulating M secondary signals with the first main signal, and the M secondary signals include a second reference signal, or include a second reference signal with the same length and opposite phase. two second reference signals;
  • Perform coherent demodulation processing on the modulated secondary signal according to the first main signal to obtain data in the secondary signal including:
  • the processed co-occurring back-scattering modulation block is coherently demodulated according to the second reference signal in the processed co-occurring back-scattering modulation block to obtain data in the secondary signal.
  • the receiving end device performs coherent demodulation processing on the modulated secondary signal according to the first main signal to obtain the data in the secondary signal, which has been carried out in the embodiment of the backscatter communication device. Detailed description will not be repeated here.
  • hierarchical demodulation at the UE receiving end is completed by setting reference signals in the primary signal and the secondary signal respectively.
  • the Type-I reference signal first reference signal
  • the Type-II reference signal second reference signal
  • the UE In the hierarchical demodulation process of the digital symbols of the primary signal and the secondary signal, the UE first uses the demodulation method described in the transmitting end device embodiment to demodulate the digital symbols x[n] related to the primary signal, and then uses the backscatter communication equipment to implement The demodulation method described in the example demodulates the digital symbol B[m] associated with the secondary signal.
  • T Proc is the processing time of DFT and IDFT of the received signal by the Tag receiving end.
  • T Proc ⁇ 0 no detailed explanation will be given here. Because the UE receiving end only needs to perform cancellation processing on the gNB-UE signal based on the previously demodulated main signal, and then use the same layered demodulation method in the embodiment to demodulate the symbiotic backscatter communication signal.
  • Figure 15 shows the layered demodulation process at the UE receiving end.
  • the UE receiving end includes a primary signal receiver, a channel decoder, a group signal symbol replicator, a delayer, and a secondary signal receiver.
  • T in the delayer is the overall processing time of the main signal receiver, channel decoder and main signal symbol replicator. Additionally, whether a DFT block is inserted in an embodiment depends on whether a single carrier or multiple carriers are used.
  • the main signal receiver uses the Type-I reference signal to phase invert the received signal. Finally, the main signal receiver needs to perform a DFT operation to obtain the main signal modulation symbols in the frequency domain.
  • the main signal receiver demodulates the main signal x[n] according to the reference signal inserted in the main signal to obtain the main signal estimate. Then the information bits are decoded through the channel decoder and the main signal data is obtained
  • the secondary signal receiver passes through the primary signal data based on the symbiotic backscattered digital signal y[nT] delayed by T.
  • main signal for symbol duplication Obtain the weighted average co-occurrence backscatter modulation block signal.
  • the co-occurring backscatter modulation block signal can be approximated as
  • the secondary signal B[m] is demodulated according to the Type-II reference signal inserted in the secondary signal to obtain the secondary signal estimate.
  • the estimated main signal and the copied main signal symbol is different.
  • the former has a higher bit error rate, while the latter usually has a very low bit error rate due to channel decoding gain.
  • the receiving end device can simply and effectively respond to the first reference signal in the first main signal.
  • the first main signal is coherently demodulated and decoded, and then the secondary signal can be demodulated according to the data of the demodulated first main signal, thereby achieving simple demodulation of the main signal in the symbiotic backscatter communication signal. and sub-signal purposes.
  • the execution subject may be a signal processing device.
  • a signal processing device executing a signal processing method is used as an example to illustrate the signal processing device provided by the embodiment of the present application.
  • this embodiment of the present application provides a signal processing device 1600, which is applied to the sending end device and includes:
  • the first modulation module 1601 is used by the sending end device to modulate the main signal in the symbiotic backscattering communication signal to obtain the first main signal;
  • the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, and N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers.
  • the device also includes:
  • the first sending module is used to send the first main signal.
  • the first modulation module includes:
  • the first acquisition sub-module is used to acquire the time domain signal corresponding to the main signal
  • a first dividing submodule used to divide the time domain signal into one or more modulation blocks
  • the second acquisition submodule is used to insert K first reference signals into each modulation block corresponding to the time domain signal to obtain the first main signal.
  • the first modulation module includes:
  • the third acquisition sub-module is used to acquire the frequency domain signal corresponding to the main signal
  • a second dividing submodule used to divide the frequency domain signal into one or more modulation blocks
  • the fourth acquisition sub-module is used to insert K first reference signals into each modulation block corresponding to the frequency domain signal to obtain the first main signal.
  • K reference signals in each modulation block correspond to a reference sequence
  • K*M reference signals in the first main signal correspond to a reference sequence
  • the first sending module includes:
  • a first selection submodule configured to select a first group of transmission configuration information from at least one group of transmission configuration information, where each group of transmission configuration information includes carrier configuration information and antenna configuration information corresponding to the carrier configuration information;
  • the first sending sub-module is configured to send the first main signal according to the first set of transmission configuration information.
  • the first set of transmission configuration information includes: first single carrier configuration information or first multi-carrier configuration information of the sending end device, second single carrier configuration information of the backscattering communication device, and all the information of the sending end device. configure information to the antenna;
  • the first set of transmission configuration information includes: first single-carrier configuration information or first multi-carrier configuration information of the transmitting end device, second multi-carrier configuration information of the backscattering communication device, and beamforming of the transmitting end device. Antenna configuration information.
  • the transmission configuration information is associated with at least one of the following:
  • the device of the embodiment of the present application also includes:
  • An update module configured to update the at least one set of transmission configuration information according to measurement quantity reporting information or channel change information.
  • the device of the embodiment of the present application also includes:
  • the first determination module is used to determine at least one of N and K based on L1 signaling, media access control unit MAC CE signaling or radio resource control RRC configuration information.
  • the K first reference signals are located in the first N resource units of the modulation block, and each of the first reference signals corresponds to one resource unit.
  • the sending end device inserts K first reference signals into each modulation block of the main signal to obtain the first main signal, so that the receiving end device can simply and effectively modify the first reference signal based on the first reference signal.
  • a primary signal is coherently demodulated and decoded, and then the secondary signal can be demodulated according to the demodulated data of the first primary signal, thereby achieving simple demodulation of the primary signal and the symbiotic backscattering communication signal.
  • the purpose of the secondary signal is
  • this embodiment of the present application also provides a signal processing device 1700, which is applied to backscatter communication equipment, including:
  • the first receiving module 1701 is used to receive the first main signal.
  • the first main signal includes M modulation blocks.
  • Each of the modulation blocks includes K first reference signals, 1 ⁇ K ⁇ N, and N is each The number of resource units included in each of the modulation blocks, K is a positive integer, N ⁇ 2, and M and N are positive integers;
  • the second modulation module 1702 is used to modulate M secondary signals according to the first main signal to obtain modulated secondary signals.
  • the device of the embodiment of the present application also includes:
  • the second sending module is used to send the modulated secondary signal.
  • the M secondary signals include one second reference signal, or two second reference signals with the same length and opposite phases.
  • the number of resource units corresponding to the second reference signal is the same as the number of resource units corresponding to the P modulation blocks, 1 ⁇ P ⁇ M/2.
  • the modulation block in the first main signal is a modulation block corresponding to the time domain signal of the main signal
  • the second modulation module is used to modulate M secondary signals according to the modulation block corresponding to the time domain signal of the main signal to obtain modulated secondary signals.
  • the modulation block in the first main signal is a modulation block corresponding to the frequency domain signal of the main signal
  • the second modulation module includes:
  • the fourth processing submodule is used to perform discrete Fourier transform DFT processing on the modulation block corresponding to the frequency domain signal of the main signal to obtain the target modulation block;
  • the fifth processing submodule is used to modulate the M secondary signals according to the target modulation block to obtain the first signal
  • the sixth processing sub-module is used to perform inverse discrete Fourier transform IDFT processing on the primary signal to obtain a modulated secondary signal.
  • the one second reference signal corresponds to one reference sequence, or the two second reference signals correspond to one reference sequence.
  • the secondary signal is modulated by the first main signal including the first reference signal, and the modulated secondary signal is obtained and backscattered, so that the receiving end device can simply and effectively process the signal according to the first reference signal.
  • the first primary signal is subjected to coherent demodulation and decoding processing, and then the secondary signal can be demodulated according to the data of the demodulated first primary signal, thereby achieving simple demodulation of the primary signal in the symbiotic backscatter communication signal. Purpose of signals and sub-signals.
  • this embodiment of the present application also provides a signal processing device 1800, which is applied to the receiving end device and includes:
  • the first processing module 1801 is used to obtain the first main signal, and perform coherent demodulation and decoding on the first main signal according to the first reference signal in the first main signal to obtain the first main signal.
  • the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, and N is the number of resource units included in each modulation block. Quantity, K is a positive integer, N ⁇ 2, and M and N are positive integers;
  • the second processing module 1802 is used to obtain the symbiotic backscattering modulation block, perform coherent demodulation processing on the symbiotic backscattering modulation block according to the first main signal, and obtain the data in the secondary signal, and M is a positive integer. .
  • the first processing module includes:
  • a first demodulation submodule configured to coherently demodulate the first main signal according to the first reference signal in the first main signal to obtain a first main signal estimate
  • the first decoding submodule is configured to perform bit decoding processing on the first main signal estimated value through a channel decoder to obtain data in the first main signal.
  • the modulated secondary signal is obtained by modulating M secondary signals with the first main signal, and the M secondary signals include a second reference signal, or include a second reference signal with the same length and opposite phase. two second reference signals;
  • the second processing module includes:
  • the first processing sub-module is used to perform copy processing on the first main signal to obtain the copied main signal;
  • the second processing submodule is used to perform weighted average processing on the symbiotic backscattering modulation block through the copied main signal to obtain the processed symbiotic backscattering modulation block;
  • the third processing sub-module is used to perform coherent demodulation processing on the processed co-occurring back-scattering modulation block according to the second reference signal in the processed co-occurring back-scattering modulation block to obtain the data in the secondary signal.
  • the receiving end device can simply and effectively respond to the first reference signal in the first main signal.
  • the first main signal is coherently demodulated and decoded, and then the secondary signal can be demodulated according to the data of the demodulated first main signal, thereby achieving simple demodulation of the main signal in the symbiotic backscatter communication signal. and sub-signal purposes.
  • the signal processing device in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or may be a component in the electronic device, such as an integrated circuit or chip.
  • the electronic device may be a terminal or other devices other than the terminal.
  • terminals may include but are not limited to the types of terminals 11 listed above, and other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., which are not specifically limited in the embodiment of this application.
  • NAS Network Attached Storage
  • the signal processing device provided by the embodiments of the present application can implement each process implemented by the method embodiments in Figures 5 to 15 and achieve the same technical effect. To avoid duplication, details will not be described here.
  • this embodiment of the present application also provides a communication device 1900, which includes a processor 1901 and a memory 1902.
  • the memory 1902 stores programs or instructions that can be run on the processor 1901, such as , when the communication device 1900 is a terminal, when the program or instruction is executed by the processor m01, each step of the signal processing method embodiment executed by the above-mentioned sending end device, backscattering communication device or receiving end device is implemented, and the same can be achieved.
  • technical effects When the communication device 1900 is a network-side device, when the program or instruction is executed by the processor 1901, each step of the signal processing method embodiment executed by the sending end device, the backscattering communication device or the receiving end device is implemented, and the same can be achieved. The technical effects will not be repeated here to avoid repetition.
  • An embodiment of the present application also provides a terminal, including a processor and a communication interface.
  • the processor is configured to modulate the main signal in the symbiotic backscattering communication signal to obtain a first main signal; wherein the first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers;
  • the communication interface is used to receive a first main signal
  • the first main signal includes M modulation blocks
  • each of the modulation blocks includes K first reference signals, 1 ⁇ K ⁇ N
  • N is each The number of resource units included in the modulation block
  • K is a positive integer
  • N ⁇ 2 and M and N are positive integers.
  • the processor is used to modulate M secondary signals according to the first main signal to obtain the modulated secondary signals.
  • the processor is configured to acquire the first main signal, and perform coherent demodulation and decoding processing on the first main signal according to the first reference signal in the first main signal to obtain the data in the first main signal.
  • the first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers;
  • FIG. 20 is a schematic diagram of the hardware structure of a terminal that implements an embodiment of the present application.
  • the terminal 2000 includes but is not limited to: radio frequency unit 2001, network module 2002, audio output unit 2003, input unit 2004, sensor 2005, display unit 2006, user input unit 2007, interface unit 2008, memory At least some components in the memory 2009 and the processor 2010 and so on.
  • the terminal 2000 may also include a power supply (such as a battery) that supplies power to various components.
  • the power supply may be logically connected to the processor 2010 through a power management system, thereby managing charging, discharging, and power consumption through the power management system. Management and other functions.
  • the terminal structure shown in Figure 20 does not constitute a limitation on the terminal.
  • the terminal may include more or fewer components than shown in the figure, or some components may be combined or arranged differently, which will not be described again here.
  • the input unit 2004 may include a graphics processing unit (Graphics Processing Unit, GPU) 20041 and a microphone 20042.
  • the graphics processor 20041 is responsible for the operation of the image capture device (GPU) in the video capture mode or the image capture mode. Process the image data of still pictures or videos obtained by cameras (such as cameras).
  • the display unit 2006 may include a display panel 20061, which may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like.
  • the user input unit 2007 includes at least one of a touch panel 20071 and other input devices 20072. Touch panel 20071, also known as touch screen.
  • the touch panel 20071 may include two parts: a touch detection device and a touch controller.
  • Other input devices 20072 may include but are not limited to physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be described again here.
  • the radio frequency unit 2001 after receiving downlink data from the network side device, can transmit it to the processor 2010 for processing; in addition, the radio frequency unit 2001 can send uplink data to the network side device.
  • the radio frequency unit 2001 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.
  • Memory 2009 may be used to store software programs or instructions as well as various data.
  • the memory 2009 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 instructions required for at least one function (such as a sound playback function, Image playback function, etc.) etc.
  • memory 2009 may include volatile memory or nonvolatile memory, or memory 2009 may include both volatile and nonvolatile memory.
  • non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically removable memory.
  • Volatile memory can be random access memory (Random Access Memory, RAM), static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synch link DRAM) , SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DRRAM).
  • RAM Random Access Memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • synchronous dynamic random access memory Synchronous DRAM, SDRAM
  • Double data rate synchronous dynamic random access memory Double Data Rate SDRAM, DDRSDRAM
  • Enhanced SDRAM, ESDRAM synchronous link dynamic random access memory
  • Synch link DRAM synchronous link dynamic random access memory
  • SLDRAM direct memory bus random access memory
  • the processor 2010 may include one or more processing units; optionally, the processor 2010 integrates an application processor and a modem processor, where the application processor mainly handles operations related to the operating system, user interface, application programs, etc., Modem processors mainly process wireless communication signals, such as baseband processors. It can be understood that the above modem processor may not be integrated into the processor 2010.
  • the sending end device modulates the main signal in the symbiotic backscattering communication signal to obtain the first main signal
  • the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, and N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers.
  • the radio frequency unit 2001 is also used to send the first main signal.
  • the processor 2010 is configured to obtain the time domain signal corresponding to the main signal
  • K first reference signals are inserted into each modulation block corresponding to the time domain signal to obtain the first main signal.
  • the processor 2010 is configured to obtain the frequency domain signal corresponding to the main signal
  • K first reference signals are inserted into each modulation block corresponding to the frequency domain signal to obtain the first main signal.
  • K reference signals in each modulation block correspond to a reference sequence
  • K*M reference signals in the first main signal correspond to a reference sequence
  • the radio frequency unit 2001 is also configured to select a first group of transmission configuration information from at least one group of transmission configuration information, each group of transmission configuration information including carrier configuration information and antenna configuration information corresponding to the carrier configuration information;
  • the first main signal is sent according to the first set of transmission configuration information.
  • the first set of transmission configuration information includes: first single carrier configuration information or first multi-carrier configuration information of the sending end device, second single carrier configuration information of the backscattering communication device, and all the information of the sending end device. configure information to the antenna;
  • the first set of transmission configuration information includes: first single-carrier configuration information or first multi-carrier configuration information of the transmitting end device, second multi-carrier configuration information of the backscattering communication device, and beamforming of the transmitting end device. Antenna configuration information.
  • the transmission configuration information is associated with at least one of the following:
  • the processor 2010 is configured to update the at least one set of transmission configuration information according to measurement quantity reporting information or channel change information.
  • the processor 2010 is configured to determine at least one of N and K according to L1 signaling, media access control unit MAC CE signaling or radio resource control RRC configuration information.
  • the K first reference signals are located in the first N resource units of the modulation block, and each of the first reference signals corresponds to one resource unit.
  • the radio frequency unit 2001 is configured to receive a first main signal, where the first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, And M and N are positive integers;
  • the processor 2010 is configured to modulate M secondary signals according to the first main signal to obtain modulated secondary signals.
  • the radio frequency unit 2001 is configured to send the modulated secondary signal.
  • the M secondary signals include one second reference signal, or two second reference signals with the same length and opposite phases.
  • the number of resource units corresponding to the second reference signal is the same as the number of resource units corresponding to the P modulation blocks, 1 ⁇ P ⁇ M/2.
  • the modulation block in the first main signal is a modulation block corresponding to the time domain signal of the main signal
  • the processor 2010 is configured to modulate the M secondary signals according to the modulation block corresponding to the time domain signal of the primary signal to obtain a modulated secondary signal.
  • the modulation block in the first main signal is a modulation block corresponding to the frequency domain signal of the main signal
  • the processor 2010 is configured to perform discrete Fourier transform DFT processing on the modulation block corresponding to the frequency domain signal of the main signal to obtain a target modulation block; modulate the M secondary signals according to the target modulation block, Obtain the primary signal; perform inverse discrete Fourier transform (IDFT) processing on the primary signal to obtain the modulated secondary signal.
  • DFT discrete Fourier transform
  • the one second reference signal corresponds to one reference sequence, or the two second reference signals correspond to one reference sequence.
  • the processor 2010 is configured to acquire a first main signal, and perform coherent demodulation and decoding on the first main signal according to a first reference signal in the first main signal, to obtain Data in the first main signal, the first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, N is each modulation block The number of resource units included in the block, K is a positive integer, N ⁇ 2, and M and N are positive integers; obtain the symbiotic backscattering modulation block, and perform the symbiotic backscattering modulation block according to the first main signal.
  • Coherent demodulation processing is used to obtain the data in the secondary signal, and M is a positive integer.
  • the processor 2010 is further configured to coherently demodulate the first main signal according to the first reference signal in the first main signal to obtain a first main signal estimate; use a channel decoder to The first main signal estimated value is subjected to bit decoding processing to obtain the data in the first main signal.
  • the modulated secondary signal is obtained by modulating M secondary signals with the first main signal, and the M secondary signals include a second reference signal, or include a second reference signal with the same length and opposite phase. two second reference signals;
  • the processor 2010 is also configured to perform copy processing on the first main signal to obtain a copied main signal; perform weighted average processing on the symbiotic backscatter modulation block through the copied main signal to obtain a processed symbiotic backscatter modulation block. a backscattering modulation block; performing coherent demodulation processing on the processed co-occurring back-scattering modulation block according to the second reference signal in the processed co-occurring back-scattering modulation block to obtain data in the secondary signal.
  • the sending end device inserts K first reference signals into each modulation block of the main signal to obtain the first main signal, so that the receiving end device can simply and effectively modify the first reference signal based on the first reference signal.
  • main signal phase Dry demodulation and decoding processing can then demodulate the secondary signal based on the data of the demodulated first primary signal, thereby achieving the purpose of simply demodulating the primary signal and secondary signal in the symbiotic backscattering communication signal.
  • Embodiments of the present application also provide a network side device, including a processor and a communication interface.
  • the processor is used to modulate the main signal in the symbiotic backscattering communication signal to obtain a first main signal; wherein, the first main signal Includes M modulation blocks, each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2 , and M and N are positive integers;
  • the communication interface is used to receive a first main signal
  • the first main signal includes M modulation blocks
  • each of the modulation blocks includes K first reference signals, 1 ⁇ K ⁇ N
  • N is each The number of resource units included in the modulation block
  • K is a positive integer
  • N ⁇ 2 and M and N are positive integers.
  • the processor is used to modulate M secondary signals according to the first main signal to obtain the modulated secondary signals.
  • the processor is configured to acquire the first main signal, and perform coherent demodulation and decoding processing on the first main signal according to the first reference signal in the first main signal to obtain the data in the first main signal.
  • the first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers;
  • This network-side device embodiment corresponds to the above-mentioned method embodiment.
  • Each implementation process and implementation manner of the above-mentioned method embodiment can be applied to this network-side device embodiment, and can achieve the same technical effect.
  • the embodiment of the present application also provides a network side device.
  • the network side device 2100 includes: an antenna 211, a radio frequency device 212, a baseband device 213, a processor 214 and a memory 215.
  • the antenna 211 is connected to the radio frequency device 212 .
  • the radio frequency device 212 receives information through the antenna 211 and sends the received information to the baseband device 213 for processing.
  • the baseband device 213 processes the information to be sent and sends it to the radio frequency device 212.
  • the radio frequency device 212 processes the received information and then sends it out through the antenna 211.
  • the method performed by the transmitting end device or the receiving end device in the above embodiments can be implemented in the baseband device 213, which includes a baseband processor.
  • the baseband device 213 may include, for example, at least one baseband board on which multiple chips are disposed, as shown in FIG. 21 .
  • One of the chips is, for example, a baseband processor, which is connected to the memory 215 through a bus interface to call the memory 215 .
  • the program executes the operations of the sending device or the receiving device shown in the above method embodiment.
  • the network side device may also include a network interface 216, which is, for example, a common public radio interface (CPRI).
  • a network interface 216 which is, for example, a common public radio interface (CPRI).
  • CPRI common public radio interface
  • the network side device 2100 in the embodiment of the present application also includes: instructions or programs stored in the memory 215 and executable on the processor 214.
  • the processor 214 calls the instructions or programs in the memory 215 to execute the instructions shown in Figures 16, 17 or 18 shows the implementation method of each module and achieves the same technical effect. To avoid repetition, it will not be repeated here.
  • Embodiments of the present application also provide a readable storage medium.
  • Programs or instructions are stored on the readable storage medium.
  • the program or instructions are executed by a processor, each process of the above signal processing method embodiment is implemented and the same can be achieved. skills To avoid repetition, we will not go into details here.
  • the processor is the processor in the terminal described in the above embodiment.
  • the readable storage medium may be non-volatile or non-transient.
  • Readable storage media may include computer-readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disks or optical disks.
  • An embodiment of the present application further provides a chip.
  • the chip includes a processor and a communication interface.
  • the communication interface is coupled to the processor.
  • the processor is used to run programs or instructions to implement the above signal processing method embodiments. Each process can achieve the same technical effect. To avoid duplication, it will not be described again here.
  • chips mentioned in the embodiments of this application may also be called system-on-chip, system-on-a-chip, system-on-chip or system-on-chip, etc.
  • Embodiments of the present application further provide a computer program/program product.
  • the computer program/program product is stored in a storage medium.
  • the computer program/program product is executed by at least one processor to implement the above signal processing method embodiment.
  • Each process can achieve the same technical effect. To avoid repetition, we will not go into details here.
  • Embodiments of the present application also provide a signal processing system, including: a transmitting end device, a backscattering communication device, and a receiving end device.
  • the transmitting end device can be used to perform the signal processing method performed by the transmitting end device as described above.
  • the backscatter communication device may be used to perform the steps of the signal processing method performed by the backscatter communication device as described above
  • the receiving end device may be used to perform the signal processing method performed by the receiving end device as described above. step,.
  • the methods of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better. implementation.
  • the technical solution of the present application can be embodied in the form of a computer software product that is essentially or contributes to related technologies.
  • the computer software product is stored in a storage medium (such as ROM/RAM, disk, CD), including several instructions to cause a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in various embodiments of this application.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente demande se rapporte au domaine technique des communications et divulgue un procédé et un appareil de traitement de signal, ainsi qu'un dispositif de communication. Le procédé de traitement de signal des modes de réalisation de la présente demande consiste en ce que : un dispositif d'extrémité de transmission module un signal principal en un signal de communication de rétrodiffusion symbiotique pour obtenir un premier signal principal, le premier signal principal comprenant M blocs de modulateur, chaque bloc de modulateur comprenant K premiers signaux de référence, K étant supérieur ou égal à 1 et étant inférieur ou égal à N, N étant le nombre d'unités de ressource comprises dans chaque bloc de modulateur, K étant un nombre entier positif, N étant supérieur ou égal à 2 et M et N étant des nombres entiers positifs.
PCT/CN2023/112530 2022-08-17 2023-08-11 Procédé et appareil de traitement de signal et dispositif de communication WO2024037446A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021119987A1 (fr) * 2019-12-17 2021-06-24 华为技术有限公司 Procédé de communication par rétrodiffusion, dispositif d'excitation, réflecteur et récepteur
WO2021169586A1 (fr) * 2020-02-27 2021-09-02 华为技术有限公司 Procédé et appareil de communication
CN113495266A (zh) * 2020-04-02 2021-10-12 索尼公司 电子设备、用于定位的方法和非暂态计算机可读存储介质
WO2021253307A1 (fr) * 2020-06-18 2021-12-23 Qualcomm Incorporated Indication d'informations de commande de liaison descendante pour détection passive

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021119987A1 (fr) * 2019-12-17 2021-06-24 华为技术有限公司 Procédé de communication par rétrodiffusion, dispositif d'excitation, réflecteur et récepteur
WO2021169586A1 (fr) * 2020-02-27 2021-09-02 华为技术有限公司 Procédé et appareil de communication
CN113495266A (zh) * 2020-04-02 2021-10-12 索尼公司 电子设备、用于定位的方法和非暂态计算机可读存储介质
WO2021253307A1 (fr) * 2020-06-18 2021-12-23 Qualcomm Incorporated Indication d'informations de commande de liaison descendante pour détection passive

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