CN117353801A

CN117353801A - Signal processing method and communication device

Info

Publication number: CN117353801A
Application number: CN202210753777.XA
Authority: CN
Inventors: 黄伟
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2024-01-05
Also published as: WO2024001978A1

Abstract

The application discloses a signal processing method and communication equipment, which belong to the technical field of communication, and the signal processing method in the embodiment of the application comprises the following steps: the first communication device determines a first spread spectrum sequence according to the first indication information; the first communication equipment spreads the original signal according to the first spreading sequence to generate a first signal; the first communication device sends the first signal to a second communication device, and the first communication device is a device for providing a radio frequency carrier wave source for the second communication device.

Description

Signal processing method and communication device

Technical Field

The application belongs to the technical field of communication, and particularly relates to a signal processing method and communication equipment.

Background

In a backscatter communication (Backscatter Communication, BSC) system, a radio frequency source may be generally included, a backscatter communication transmitting device and a backscatter communication receiving device, the radio frequency source may provide a radio frequency carrier source for the backscatter communication transmitting device, the backscatter communication transmitting device may signal modulate and backscatter the radio frequency signal and transmit the resulting backscatter signal to the backscatter communication receiving device, and the backscatter communication receiving device may demodulate the received backscatter signal to enable communication with the backscatter communication transmitting device.

However, in an actual application scenario, when the backscatter communication receiving device receives a signal, the received signal includes not only the backscatter signal sent by the backscatter communication sending device, but also a self-interference signal or a direct link interference signal of the same frequency. Thus, in order to obtain a useful backscatter signal, it is necessary to cancel the self-interference signal or direct link interference signal received by the backscatter communication receiving device. However, there is currently a lack of an effective solution to achieve such an objective.

Disclosure of Invention

The embodiment of the application provides a signal processing method and communication equipment, which can solve the problem that self-interference signals or direct link interference signals received by back scattering communication receiving equipment cannot be effectively eliminated at present.

In a first aspect, a signal processing method is provided, the method comprising:

the first communication device determines a first spread spectrum sequence according to the first indication information;

the first communication equipment spreads the original signal according to the first spreading sequence to generate a first signal;

the first communication device sends the first signal to a second communication device, and the first communication device is a device for providing a radio frequency carrier wave source for the second communication device.

In a second aspect, there is provided a signal processing apparatus comprising:

a determining module, configured to determine a first spreading sequence according to the first indication information;

the signal processing module is used for spreading the original signal according to the first spreading sequence to generate a first signal;

and the sending module is used for sending the first signal to a second communication device, and the device is a device for providing a radio frequency carrier wave source for the second communication device.

In a third aspect, a signal processing method is provided, the method comprising:

the second communication equipment receives a first signal, and the first signal is generated after the first communication equipment spreads the original signal according to a first spreading sequence;

the second communication device determines a second spread spectrum sequence according to third indication information;

the second communication device spreads the back-scattering modulation signal according to the second spreading sequence to generate a second signal, wherein the back-scattering modulation signal is generated by modulating and back-scattering the first signal;

the second communication device transmits the second signal to a third communication device.

In a fourth aspect, there is provided a signal processing apparatus comprising:

The receiving module is used for receiving a first signal, and the first signal is generated after the first communication equipment spreads the original signal according to a first spreading sequence;

a determining module, configured to determine a second spreading sequence according to the third indication information;

the signal processing module is used for spreading the back-scattering modulation signal according to the second spreading sequence to generate a second signal, and the back-scattering modulation signal is generated by modulating and back-scattering the first signal;

and the sending module is used for sending the second signal to third communication equipment.

In a fifth aspect, there is provided a signal processing method, the method comprising:

the third communication equipment receives a first signal and a second signal, wherein the first signal is generated after the first communication equipment spreads the original signal according to a first spreading sequence, the second signal is generated after the second communication equipment spreads a back-scattering modulation signal according to a second spreading sequence, and the back-scattering modulation signal is generated after the second communication equipment modulates and back-scatters the first signal;

the third communication device determines a third spread spectrum sequence according to fifth indication information;

The third communication device despreads the first signal and the second signal according to the third spreading sequence.

In a sixth aspect, there is provided a signal processing apparatus comprising:

the receiving module is used for receiving a first signal and a second signal, the first signal is generated after the first communication equipment spreads the original signal according to a first spreading sequence, the second signal is generated after the second communication equipment spreads a back-scattering modulation signal according to a second spreading sequence, and the back-scattering modulation signal is generated after the second communication equipment modulates and back-scatters the first signal;

a determining module, configured to determine a third spreading sequence according to the fifth indication information;

and the signal processing module is used for despreading the first signal and the second signal according to the third spreading sequence.

In a seventh aspect, there is provided a signal processing method, the method comprising:

the fourth communication device configures or indicates at least one of the first spreading sequence, the second spreading sequence, and the third spreading sequence to the first communication device, the second communication device, and the third communication device;

the first spreading sequence is used for spreading an original signal by the first communication device to generate a first signal, the second spreading sequence is used for spreading a back-scattering modulation signal by the second communication device to generate a second signal, the back-scattering modulation signal is generated after modulating and back-scattering the first signal, and the third spreading sequence is used for despreading the first signal and the second signal by the third communication device.

An eighth aspect provides a signal processing apparatus, the apparatus comprising:

a configuration module configured to configure or indicate at least one of a first spreading sequence, a second spreading sequence, and a third spreading sequence to the first communication device, the second communication device, and the third communication device;

In a ninth aspect, there is provided a communication device comprising a processor and a memory storing a program or instructions executable on the processor, the program or instructions implementing the steps of the method according to the first aspect, or implementing the steps of the method according to the third aspect, or implementing the steps of the method according to the fifth aspect, or implementing the steps of the method according to the seventh aspect.

In a tenth aspect, a communication device is provided, including a processor and a communication interface, where the processor is configured to determine a first spreading sequence according to first indication information; spreading the original signal according to the first spreading sequence to generate a first signal; the communication interface is used for sending the first signal to a second communication device, and the communication device is a device for providing a radio frequency carrier wave source for the second communication device; or alternatively, the first and second heat exchangers may be,

the communication interface is used for receiving a first signal, and the first signal is generated after the first communication equipment spreads the original signal according to a first spreading sequence; the processor is used for determining a second spread spectrum sequence according to the third indication information; spreading a back-scattering modulation signal according to the second spreading sequence to generate a second signal, wherein the back-scattering modulation signal is generated by modulating and back-scattering the first signal; the communication interface is used for sending the second signal to third communication equipment; or alternatively, the first and second heat exchangers may be,

the communication interface is used for receiving a first signal and a second signal, the first signal is generated after the first communication equipment spreads the original signal according to a first spreading sequence, the second signal is generated after the second communication equipment spreads a back-scattering modulation signal according to a second spreading sequence, and the back-scattering modulation signal is generated after the second communication equipment modulates and back-scatters the first signal; the processor is used for determining a third spread spectrum sequence according to fifth indication information; despreading the first signal and the second signal according to the third spreading sequence; or alternatively, the first and second heat exchangers may be,

The communication interface is configured to configure or indicate at least one of a first spreading sequence, a second spreading sequence, and a third spreading sequence to the first communication device, the second communication device, and the third communication device; the first spreading sequence is used for spreading an original signal by the first communication device to generate a first signal, the second spreading sequence is used for spreading a back-scattering modulation signal by the second communication device to generate a second signal, the back-scattering modulation signal is generated after modulating and back-scattering the first signal, and the third spreading sequence is used for despreading the first signal and the second signal by the third communication device.

In an eleventh aspect, there is provided a signal processing system comprising: at least two of a first communication device, a second communication device, a third communication device and a fourth communication device, the first communication device being operable to perform the steps of the signal processing method according to the first aspect, the second communication device being operable to perform the steps of the signal processing method according to the third aspect, the third communication device being operable to perform the steps of the signal processing method according to the fifth aspect, and the fourth communication device being operable to perform the steps of the signal processing method according to the seventh aspect.

In a twelfth aspect, there is provided a readable storage medium having stored thereon a program or instructions which when executed by a processor, performs the steps of the method as described in the first aspect, or performs the steps of the method as described in the third aspect, or performs the steps of the method as described in the fifth aspect, or performs the steps of the method as described in the seventh aspect.

In a thirteenth aspect, there is provided a chip comprising a processor and a communication interface, the communication interface and the processor being coupled, the processor being adapted to run a program or instructions, to implement the method according to the first aspect, or to implement the method according to the third aspect, or to implement the method according to the fifth aspect, or to implement the method according to the seventh aspect.

In a fourteenth aspect, there is provided a computer program/program product stored in a storage medium, the computer program/program product being executable by at least one processor to perform the steps of the signal processing method as described in the first aspect, or to perform the steps of the signal processing method as described in the third aspect, or to perform the steps of the signal processing method as described in the fifth aspect, or to perform the steps of the signal processing method as described in the seventh aspect.

In this embodiment of the present application, when the first communication device sends a signal to the second communication device, the first communication device may perform spreading on the original signal based on the indicated first spreading sequence to obtain a first signal, and send the first signal to the second communication device, when the second communication device sends a backscatter signal to the third communication device, the second communication device may generate a second signal according to the backscatter signal and the indicated second spreading sequence, and send the second signal to the third communication device, and after receiving the first signal and the second signal, the third communication device may perform despreading on the first signal and the second signal according to the indicated third spreading sequence. Because the first signal and the second signal are both signals processed by the spreading sequence, when the third communication device despreads the first signal and the second signal based on the spreading sequence, the third communication device can eliminate the interference signal and recover the useful backscatter signal based on the characteristics of the spreading sequence, so as to effectively eliminate the interference signal, ensure the communication performance of backscatter communication, and improve the transmission efficiency, transmission distance and reliability of backscatter communication.

Drawings

Fig. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a backscatter communication system according to an embodiment of the present application;

FIG. 3 is a schematic flow chart of a signal processing method according to an embodiment of the present application;

FIG. 4 is a schematic flow chart of a signal processing method according to an embodiment of the present application;

FIG. 5 is a schematic flow chart of a signal processing method according to an embodiment of the present application;

FIG. 6 is a schematic flow chart of a signal processing method according to an embodiment of the present application;

FIG. 7 is a schematic flow chart of a signal processing method according to an embodiment of the present application;

FIG. 8 is a schematic flow chart of a signal processing method according to an embodiment of the present application;

fig. 9 is a schematic diagram of a signal processing method according to an embodiment of the present application;

fig. 10 is a schematic diagram of a signal processing method according to an embodiment of the present application;

fig. 11 is a schematic diagram of a signal processing apparatus according to an embodiment of the present application;

fig. 12 is a schematic structural view of a signal processing apparatus according to an embodiment of the present application;

fig. 13 is a schematic structural view of a signal processing apparatus according to an embodiment of the present application;

fig. 14 is a schematic structural view of a signal processing apparatus according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of a communication device according to an embodiment of the present application;

Fig. 16 is a schematic structural view of a communication device according to an embodiment of the present application;

fig. 17 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

Currently, in a backscatter communication system, when receiving a backscatter signal transmitted by a backscatter communication transmitting device, a backscatter communication receiving device may also receive an interference signal at the same time. Specifically, in the single-base backscatter communication (Monostatic Backscatter Communication System, MBCSs) architecture, the radio frequency source and the backscatter communication receiving device are the same device, and the radio frequency source (backscatter communication receiving device) transmits a radio frequency carrier signal to provide energy and a target carrier for the backscatter communication transmitting device on the one hand, and receives a useful backscatter signal for backscatter transmission by the backscatter communication transmitting device on the other hand, so that the radio frequency carrier signal transmitted by the radio frequency source (backscatter communication receiving device) and the received backscatter signal are on the same antenna, and the signal strength of the radio frequency carrier signal is far greater than that of the received useful backscatter signal, resulting in carrier leakage at the front end of the radio frequency source (backscatter communication receiving device) and generating a self-interference signal. Among these, the causes of the self-interference signal may include three factors: (1) The limited isolation between the receiving and transmitting causes the carrier wave of the transmitting end to leak to the receiving front end; (2) The mismatch of the antennas causes the carrier signal to reflect to the receiving front end; (3) The reflection of the carrier signal by the environment re-enters the receiving antenna.

In a dual-base backscatter communication (Bistatic Backscatter Communication Systems, BBCSs) architecture, the radio frequency source and the backscatter communication receiving devices are two devices that are physically separated, and thus, there is no self-interference signal in a single-base backscatter communication architecture, but there is direct link interference between the radio frequency source to the backscatter communication receiving devices, and, because the direct link interference may be a modulated signal, and the backscatter communication receiving devices are generally unaware of the modulation characteristics of the direct link signal, the challenges of canceling the direct link interference are greater.

In order to eliminate the self-interference signal received by the backscatter communication receiving device, in the related art, the transmit-receive channel may be isolated in the radio frequency source (backscatter communication receiving device), for example, a dual antenna structure in which the transmit and receive antennas are separated, or a multiport circulator, or a coupler may be used. For the leaked carrier wave, a carrier wave cancellation technology or a self-interference cancellation technology can be further adopted to perform carrier wave leakage cancellation, for example, a receiving two-way cancellation method, a negative feedback loop method, a dead zone amplifier cancellation method and the like can be adopted, so that the sensitivity of the receiver is improved.

In order to eliminate the direct link interference signal received by the backscatter communication receiving device, in the related art, the direct link interference signal may be treated as noise and demodulated using hard decisions, or may be designed based on the time domain structure and frequency domain structure characteristics of the radio frequency carrier signal and combined with the backscatter baseband signal, so that the backscatter communication receiving device can effectively eliminate strong direct link interference.

However, for the current self-interference signal cancellation scheme, since it mostly depends on the isolation of the transmit-receive channel or the design of the carrier cancellation circuit, the degree of interference cancellation depends on the performance of the hardware and the complexity of the hardware. Aiming at the current direct link interference signal elimination scheme, as the demodulation performance is limited by the difference value of the repeated structure and the channel delay, the influence of the received signal-to-noise ratio, the noise rise, the judgment threshold value and other factors, especially the judgment threshold value is related to the effective repeated structure length and the received signal-to-noise ratio, the optimal judgment threshold value can be changed along with the transformation of the channel, so that the scheme has high demodulation complexity and is easily influenced by the transmission environment.

Therefore, an effective technical scheme for effectively eliminating the self-interference signal or the direct link interference signal received by the back-scattering communication receiving equipment is still lacking at present.

In order to solve the above technical problems, the embodiments of the present application provide a signal processing method and a communication device, where when a first communication device sends a signal to a second communication device, the first communication device may spread an original signal based on an indicated first spreading sequence to obtain a first signal, and send the first signal to the second communication device, and when the second communication device sends a backscatter signal to a third communication device, the second communication device may generate a second signal according to the backscatter signal and an indicated second spreading sequence, and send the second signal to the third communication device, and after receiving the first signal and the second signal, the third communication device may despread the first signal and the second signal according to an indicated third spreading sequence. Because the first signal and the second signal are both signals processed by the spreading sequence, when the third communication device despreads the first signal and the second signal based on the spreading sequence, the third communication device can eliminate the interference signal and recover the useful backscatter signal based on the characteristics of the spreading sequence, so as to effectively eliminate the interference signal, ensure the communication performance of backscatter communication, and improve the transmission efficiency, transmission distance and reliability of backscatter communication.

Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of the protection of the present application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or otherwise described herein, and that the terms "first" and "second" are generally intended to be used in a generic sense and not to limit the number of objects, for example, the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.

It is noted that the techniques described in embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but may also be used in other wireless communication systems, such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single carrier frequency division multiple access (Single-carrier Frequency Division Multiple Access, SC-FDMA), and other systems. The terms "system" and "network" in embodiments of the present application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a New air interface (NR) system for purposes of example and uses NR terminology in much of the description that follows, but these techniques are also applicable to applications other than NR system applications, such as generation 6 (6) ^th Generation, 6G) communication system, wiFi system, RFID system.

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 device 12. The terminal 11 may be a mobile phone, a tablet (Tablet Personal Computer), a Laptop (Laptop Computer) or a terminal-side Device called a notebook, a personal digital assistant (Personal Digital Assistant, PDA), a palm top, a netbook, an ultra-mobile personal Computer (ultra-mobile personal Computer, UMPC), a mobile internet appliance (Mobile Internet Device, MID), an augmented reality (augmented reality, AR)/Virtual Reality (VR) Device, a robot, a Wearable Device (weather Device), a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), a smart home (home Device with a wireless communication function, such as a refrigerator, a television, a washing machine, or a furniture), a game machine, a personal Computer (personal Computer, PC), a teller machine, or a self-service machine, and the Wearable Device includes: intelligent wrist-watch, intelligent bracelet, intelligent earphone, intelligent glasses, intelligent ornament (intelligent bracelet, intelligent ring, intelligent necklace, intelligent anklet, intelligent foot chain etc.), intelligent wrist strap, intelligent clothing etc.. Note that, the specific type of the terminal 11 is not limited in the embodiment of the present application. The network-side device 12 may comprise an access network device or a core network device, wherein the access network device 12 may also be referred to as a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or a radio access network element. Access network device 12 may include a base station, a WLAN access point, a WiFi node, or the like, which may be referred to as a node B, an evolved node B (eNB), an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a home node B, a home evolved node B, a transmission and reception point (Transmitting Receiving Point, TRP), or some other suitable terminology in the art, and the base station is not limited to a particular technical vocabulary so long as the same technical effect is achieved, and it should be noted that in the embodiments of the present application, only a base station in an NR system is described as an example, and the specific type of the base station is not limited.

Fig. 2 shows a block diagram of a backscatter communication system to which embodiments of the present application are applicable. The backscatter communication system includes a radio frequency source 21, a backscatter communication transmitter 22, and a backscatter communication receiver 23, where the radio frequency source 21 can provide a radio frequency carrier wave source for the backscatter communication transmitter 22, and the backscatter communication transmitter 22 can reverse-modulate a radio frequency signal sent by the radio frequency source 21 and send the radio frequency signal to the backscatter communication receiver 23, and the backscatter communication receiver 23 demodulates the received signal. The rf source 21 may be a dedicated rf source, or a terminal or a network side device shown in fig. 1, etc., the backscatter communication receiving device 23 may be a reader/writer, or a terminal or a network side device shown in fig. 1, etc., and the backscatter communication transmitting device 22 may be a passive device or a semi-passive device, or an active device, such as a sensor, tag, etc., that does not generate an rf signal (an rf signal using an rf source). It should be noted that, the application scenario of the embodiment of the present application may be a scenario of monostatic backscatter communication, or may be a scenario of bistatic backscatter communication. In the case of single-base backscatter communication, the radio frequency source 21 and the backscatter communication receiving device 23 shown in fig. 2 are the same device, and in the case of double-base backscatter communication, the radio frequency source 21 and the backscatter communication receiving device 23 shown in fig. 2 are different devices.

The signal processing method and the communication device provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

As shown in fig. 3, the present embodiment provides a signal processing method 300, which may be performed by a first communication device, which may be the radio frequency source 21 shown in fig. 2, or the backscatter communication receiving device 23 (in the case of monostatic backscatter communication), in other words, by software or hardware installed in the radio frequency source or the backscatter communication receiving device, and which includes the following steps.

S302: the first communication device determines a first spreading sequence based on the first indication information.

The first communication device is a device providing a radio frequency carrier wave source. In particular, in a single-base backscatter communication architecture, the first communication device may be a radio frequency source and a backscatter communication receiving device (the radio frequency source and the backscatter communication receiving device being the same device), and in a dual-base backscatter communication architecture, the first communication device may be a radio frequency source.

In the embodiment of the present application, before the first communication device sends the original signal, the first spreading sequence may be determined according to the first indication information. The first spreading sequence may be used by the first communication device to spread an original signal, which may be a radio frequency carrier signal or the like.

The first indication information may be used to indicate a sequence type and a sequence length of the first spreading sequence. The sequence type of the first spreading sequence may be any one of an m-sequence, a Gold sequence, a Walsh sequence, a Pseudo-noise (PN) sequence, a Bent sequence, a Kasami sequence, a sequence zero correlation zone (zero correlation zone, ZCZ) sequence, a polyphase orthogonal sequence, a perfect complementary code, and a chaotic sequence, or alternatively, the sequence type of the first spreading sequence may be other sequences, which is not limited herein.

Alternatively, as an embodiment, the first indication information may be configured or indicated by a fourth communication device, where the fourth communication device may specifically be a first communication device, a second communication device, a third communication device, or a third party network device. That is, the first communication device may configure or indicate the first spreading sequence it uses by itself or by other communication devices to the first communication device. The second communication device may be a backscatter communication transmitting device, the third communication device may be a backscatter communication receiving device, and the third party network device may be other devices than a radio frequency source, a backscatter communication transmitting device, and a backscatter communication receiving device, for example, may be a base station, a relay device, a reader/writer device, or other terminal devices, etc.

Optionally, as an embodiment, before the first communication device determines the first spreading sequence according to the first indication information, in a case where the first indication information is configured or indicated by the fourth communication device and the fourth communication device is not the first communication device, the method further includes:

and receiving first indication information.

That is, in the case where the first indication information is configured or indicated by another communication device other than the first communication device, the first communication device also needs to receive the first indication information before determining the first spreading sequence from the first indication information. The first indication information may be configured or indicated by other communication devices through at least one of radio resource control (Radio Resource Control, RRC) signaling, medium access control (Medium Access Control Control Element, MAC CE), downlink control information (Downlink Control Information, DCI), side link control information (Sidelink Control Information, SCI), and preamble sequences.

S304: the first communication device spreads the original signal according to the first spreading sequence to generate a first signal.

After determining the first spreading sequence, the first communication device may perform spreading processing on the original signal using the first spreading sequence to obtain a first signal.

S306: the first communication device transmits a first signal to the second communication device, the first communication device being a device that provides a radio frequency carrier source to the second communication device.

The second communication device may be a backscatter communication transmitting device, the first communication device providing a radio frequency carrier wave source for the second communication device. The first communication device may transmit the first signal to the second communication device after spreading the original signal using the first spreading sequence to obtain the first signal.

Alternatively, as an embodiment, the first communication device may further indicate the first spreading sequence used by the first communication device to the second communication device, or to the second communication device and the third communication device, which is a backscatter communication receiving device. Specifically, the method comprises the following steps:

the first communication device sends second indication information to the second communication device and the third communication device under the condition that the first communication device and the third communication device are different devices;

the first communication device sends second indication information to the second communication device under the condition that the first communication device and the third communication device are the same device;

the second indication information is used for indicating the sequence type and the sequence length of the first spread spectrum sequence.

Specifically, in the single-base backscatter communication architecture, the first communication device and the third communication device are the same device, i.e., the radio frequency source and the backscatter communication receiving device are the same different device, in which case the first communication device may transmit only the second indication information to the second communication device when transmitting the second indication information. In the bistatic backscatter communication architecture, the first communication device is a different device than the third communication device, i.e., the radio frequency source and the backscatter communication receiving device are different devices, in which case the first communication device may transmit the second indication information to the second communication device and the third communication device when transmitting the second indication information.

Alternatively, as an embodiment, when the first communication device sends the second indication information to the second communication device, or to the second communication device and the third communication device, the second indication information may be sent by at least one of RRC signaling, MAC CE, DCI, SCI, and preamble sequence.

It should be noted that, the scenario in which the first communication device sends the second indication information to the second communication device, or sends the second indication information to the second communication device and the third communication device may be a scenario in which the fourth communication device does not configure or indicate the spreading sequences to the second communication device and the third communication device, in which case, the first communication device needs to send the second indication information to the second communication device, or sends the second indication information to the second communication device and the third communication device, so that the second communication device may determine the second spreading sequence based on the second indication information, and the third communication device may determine the third spreading sequence based on the second indication information, which may be specifically referred to as corresponding matters in the embodiments shown in fig. 4 and fig. 5, which are not described in detail herein. If the fourth communication device configures or indicates the spreading sequence to the second communication device and the third communication device in a unified manner, the first communication device may not need to send the second indication information to the second communication device or to the second communication device and the third communication device, so as to avoid transmission resource waste.

In the embodiment of the application, when the first communication device sends a signal to the second communication device, the first communication device may spread the original signal based on the indicated spreading sequence to obtain the first signal, and send the first signal to the second communication device. In this way, by using the spreading sequence to process the signal, when the third communication device despreads the received signal, the interference signal in the signal can be eliminated based on the characteristics of the spreading sequence and the useful backscatter signal can be recovered, so that the effective elimination of the interference signal is realized, the communication performance of the backscatter communication is ensured, and the transmission efficiency, transmission distance and reliability of the backscatter communication are improved.

As shown in fig. 4, the present embodiment provides a signal processing method 400 that can be performed by a second communication device, which may be the backscatter communication transmitting device 22 shown in fig. 2, in other words, the signal processing method may be performed by software or hardware installed in the backscatter communication transmitting device 22, the signal processing method including the following steps.

S402: the second communication device receives a first signal, which is generated by the first communication device after spreading the original signal according to the first spreading sequence.

The first communication device may transmit the first signal to the second communication device after generating the first signal from the first spreading sequence, and the second communication device may receive the first signal. The specific implementation manner of the first communication device generating the first signal according to the first spreading sequence may be referred to the embodiment shown in fig. 3, and will not be repeated here.

S404: the second communication device determines a second spreading sequence according to the third indication information.

The second communication device may determine the second spreading sequence based on the third indication information after receiving the first signal. The second spreading sequence may be used by the second communication device to generate a second signal based on a backscatter modulation signal generated by the second communication device by modulating and backscatter the first signal, the second signal being used by the second communication device to transmit to the third communication device.

Alternatively, as an embodiment, the third indication information may be indicated by the first communication device, where the third indication information is indicated by the first communication device, the third indication information may be used to indicate a sequence type and a sequence length of the first spreading sequence. Here, the third indication information may be the second indication information in the embodiment shown in fig. 3.

Optionally, as an embodiment, the third indication information may also be configured or indicated by a fourth communication device, where the fourth communication device may be the first communication device, the second communication device, the third communication device, or the third party network device. That is, the third indication information may be configured or indicated by the second communication device itself, or may be configured or indicated by another communication device. In case the third indication information is configured or indicated by the fourth communication device, the third indication information may be used to indicate a sequence type and a sequence length of the second spreading sequence. The second spreading sequence may be any one of an m-sequence, a Gold sequence, a Walsh sequence, a PN sequence, a Bent sequence, a Kasami sequence, a sequence zero correlation zone sequence ZCZ, a polyphase orthogonal sequence, a perfect complementary code, and a chaotic sequence, and may be any other type as long as the type of the second spreading sequence is different from the type of the first spreading sequence.

Optionally, as an embodiment, in a case where the third indication information is indicated by the first communication device, or configured or indicated by the fourth communication device, and the fourth communication device is not the second communication device, the second communication device determines the second spreading sequence according to the third indication information, the method further includes:

And receiving third indication information.

The third indication information may be configured or indicated by at least one of RRC signaling, MAC CE, DCI, SCI, and preamble sequence.

Alternatively, as an embodiment, in the case where the third indication information is indicated by the first communication device and the third indication information is used to indicate the sequence type and the sequence length of the first spreading sequence, the second communication device may determine the first spreading sequence according to the third indication information and then use another spreading sequence different from the sequence type of the first spreading sequence as the second spreading sequence when determining the second spreading sequence according to the third indication information. Wherein the sequence length of the second spreading sequence may be the same as or different from the sequence length of the first spreading sequence.

Alternatively, as an embodiment, in a case where the third indication information is indicated by the fourth communication device and the third indication information is used to indicate the sequence type and the sequence length of the second spreading sequence, the second communication device may determine the second spreading sequence according to the sequence type and the sequence length indicated by the third indication information when determining the second spreading sequence according to the third indication information.

S406: the second communication device spreads the backscatter modulation signal according to the second spreading sequence to generate a second signal, the backscatter modulation signal being generated by modulating and backscatter the first signal.

The second communication device, upon receiving the first signal, may backscatter modulate the first signal based on the baseband signal to generate a backscatter signal. After the generation of the backscatter signal, the backscatter signal may be spread based on the second spreading sequence determined in S304 and a second signal may be generated.

S408: the second communication device transmits a second signal to the third communication device.

The third communication device may be a backscatter communication receiving device. After the second communication device generates the second signal, the second signal may be sent to the third communication device for despreading by the third communication device, which may be referred to specifically as the embodiment shown in fig. 5, and will not be described in detail herein.

Optionally, as an embodiment, in a case where the second spreading sequence is determined by the second communication device according to the first spreading sequence indicated by the first communication device, the second communication device may further include:

and sending fourth indication information to the third communication equipment.

The fourth indication information is used for indicating the sequence type and the sequence length of the second spreading sequence or the sequence type and the sequence length of a third spreading sequence, wherein the third spreading sequence is the Kronecker product of the first spreading sequence and the second spreading sequence.

Alternatively, as an embodiment, when the second communication device sends the fourth indication information to the third communication device, the fourth indication information may be sent to the third communication device by at least one of RRC signaling, MAC CE, DCI, SCI, and preamble sequence.

In this embodiment of the present application, the first communication device may spread the original signal based on the indicated spreading sequence to obtain a first signal, and send the first signal to the second communication device, where the second device modulates and backscatter the first signal to generate a backscatter signal, and generates, based on the indicated second spreading sequence and the backscatter signal, a second signal to send to the third communication device. In this way, by using the spreading sequence to process the signal, when the third communication device despreads the received signal, the interference signal in the signal can be eliminated based on the characteristics of the spreading sequence and the useful backscatter signal can be recovered, so that the effective elimination of the interference signal is realized, the communication performance of the backscatter communication is ensured, and the transmission efficiency, transmission distance and reliability of the backscatter communication are improved.

As shown in fig. 5, the embodiment of the present application provides a signal processing method 500, which may be performed by a third communication device, which may be the backscatter communication receiving device 23 shown in fig. 2, or the radio frequency source 21 (in the context of a single-base backscatter communication architecture), in other words, by software or hardware installed in the backscatter communication receiving device or the radio frequency source, and includes the following steps.

S502: the third communication device receives a first signal and a second signal, the first signal is generated after the first communication device spreads the original signal according to a first spreading sequence, the second signal is generated after the second communication device spreads a back-scattering modulation signal according to a second spreading sequence, and the back-scattering modulation signal is generated after the second communication device modulates and back-scatters the first signal.

The first communication device may transmit the first signal to the second communication device after spreading the original signal according to the first spreading sequence and generating the first signal. After receiving the first signal, the second communication device may modulate and backscatter the first signal to generate a backscatter signal, then spread the backscatter signal according to a second spreading sequence to generate a second signal, and send the second signal to the third communication device. The specific implementation manner of the first communication device to generate the first signal may refer to the embodiment shown in fig. 3, and the specific implementation manner of the second communication device to generate the second signal may refer to the embodiment shown in fig. 4, which is not repeated herein.

The third communication device may receive, when receiving a signal, not only the second signal transmitted by the second communication device, but also the first signal transmitted by the first communication device. Wherein the second signal is a useful signal for the third communication device and the first signal is an interfering signal to be cancelled, which may be a self-interfering signal (for a single-base backscatter communication architecture) or a direct link interfering signal (for a dual-base backscatter communication architecture).

S504: the third communication device determines a third spreading sequence based on the fifth indication information.

The third communication device may determine a third spreading sequence according to the fifth indication information after receiving the first signal and the second signal. The third spreading sequence may be used by the third communication device to despread the first signal and the second signal, thereby canceling the interfering signals therein and recovering the useful backscattered signal.

Alternatively, as an embodiment, the fifth indication information may be configured or indicated by the fourth communication device. The fourth communication device is a first communication device, a second communication device, a third communication device or a third party network device. In the case where the fifth indication information is configured or indicated by the fourth communication device, the fifth indication information may be used to indicate a sequence type and a sequence length of the third spreading sequence.

Alternatively, as an embodiment, the fifth indication information may also be indicated by the second communication device. In the case where the fifth instruction information is instructed by the second communication device, the fifth instruction information may be used to indicate the sequence type and sequence length of the second spread spectrum sequence or the sequence type and sequence length of the third spread spectrum sequence. The fifth indication information here may be fourth indication information in the embodiment shown in fig. 3. The second spreading sequence is different from the first spreading sequence in sequence type, the third spreading sequence is Kronecker product of the first spreading sequence and the second spreading sequence, the first spreading sequence or the second spreading sequence can be any one of m sequence, gold sequence, walsh sequence, PN sequence, bent sequence, kasami sequence, sequence zero correlation zone sequence ZCZ, multiphase orthogonal sequence, complete complementary code, chaotic sequence, and can be of other sequence types, so long as the difference between the sequence type of the first spreading sequence and the sequence type of the second spreading sequence is ensured.

Optionally, as an embodiment, in a case where the fifth indication information is indicated by the second communication device, or is configured or indicated by the fourth communication device and the fourth communication device is not the third communication device, the third communication device further includes, before determining the third spreading sequence according to the fifth indication information:

Fifth indication information is received.

The fifth indication information is configured or indicated by the second communication device or the fourth communication device through at least one mode of RRC signaling, MAC CE, DCI, SCI and preamble sequence.

The third communication device may optionally, as an embodiment, when determining the third spreading sequence according to the fifth indication information, in a case where the fifth indication information is indicated by the second communication device and the fifth indication information is used to indicate a sequence type and a sequence length of the second spreading sequence, include:

determining a second spreading sequence according to the fifth indication information;

determining a first spread spectrum sequence according to sixth indication information, wherein the sixth indication information is used for indicating the sequence type and the sequence length of the first spread spectrum sequence;

and multiplying the first spreading sequence and the second spreading sequence by Kronecker to obtain a third spreading sequence.

That is, in the case where the fifth instruction information is used to indicate the sequence type and the sequence length of the second spread spectrum sequence, the third communication apparatus needs to determine the third spread spectrum sequence together based on the fifth instruction information and the sixth instruction information.

The sixth indication information may be indicated by the first communication device, or configured or indicated by a fourth communication device, which is the first communication device, the second communication device, the third communication device, or the third party network device. Where the sixth indication information is indicated by the first communication device, the sixth indication information may be the second indication information in the embodiment shown in fig. 3. Optionally, in the case where the sixth indication information is indicated by the first communication device, or is configured or indicated by the fourth communication device, and the fourth communication device is not the third communication device, the third communication device may further receive the sixth indication information before determining the first spreading sequence according to the sixth indication information, where the sixth indication information may be configured or indicated by the first communication device or the fourth communication device through at least one of RRC signaling, MAC CE, DCI, SCI, and preamble sequence.

When the third communication device determines the third spreading sequence according to the fifth indication information and the sixth indication information, specifically, the second spreading sequence may be determined according to the sequence type and the sequence length indicated by the fifth indication information, the first spreading sequence may be determined according to the sequence type and the sequence length indicated by the sixth indication information, and then the Kronecker multiplication is performed on the first spreading sequence and the second spreading sequence, where the spreading sequence obtained by the multiplication is the third spreading sequence.

Optionally, as an embodiment, in a case where the fifth indication information is indicated by the second communication device and the fifth indication information is used to indicate a sequence type and a sequence length of the third spreading sequence, or in a case where the fifth indication information is configured or indicated by the fourth communication device and the fifth indication information is used to indicate a sequence type and a sequence length of the third spreading sequence, the third communication device may include, when determining the third spreading sequence according to the fifth indication information:

and determining a third spreading sequence according to the fifth indication information. I.e. determining the third spreading sequence based on the sequence type and the sequence length indicated by the fifth indication information.

S506: the third communication device despreads the first signal and the second signal according to the third spreading sequence.

After determining the third spreading sequence based on the content in S504, the third communication device may despread the first signal and the second signal according to the third spreading sequence, and a specific implementation of despreading may be referred to in the related art, which is not described in detail herein.

In this embodiment of the present application, the first signal is obtained by spreading the original signal based on the first spreading sequence, the second signal is obtained by spreading the back-scattered signal based on the second spreading sequence, and the back-scattered signal is generated by modulating and back-scattering the first signal, that is, the second signal is a signal generated based on Kronecker product of the first spreading sequence and the second spreading sequence, and the equivalent is a signal generated based on the third spreading sequence. In this case, when the third communication apparatus despreads the first signal and the second signal according to the third spreading sequence, since the third spreading sequence and the first spreading sequence are orthogonal and are not orthogonal to the third spreading sequence itself, the first signal can be canceled by using the characteristic that the third spreading sequence and the first spreading sequence in the first signal are orthogonal or cross-correlated, thereby achieving the purpose of canceling the interference signal, and the backscattering signal in the second signal can be recovered by using the characteristic that the third spreading sequence and the third spreading sequence in the second signal are not orthogonal or auto-correlated, thereby obtaining a useful backscattering signal.

As shown in fig. 6, the embodiment of the present application provides a signal processing method 600, which may be performed by a fourth communication device, which may be the radio frequency source 21, or the backscatter communication receiving device 23, or the backscatter communication transmitting device 22, or the third party network device shown in fig. 2, and which may be the terminal or the network side device in the embodiment shown in fig. 1, in other words, the signal processing method may be performed by software or hardware installed in the radio frequency source, or the backscatter communication receiving device, or the backscatter communication transmitting device, or the third party network device, and the signal processing method includes the following steps.

S602: the fourth communication device configures or indicates at least one of the first spreading sequence, the second spreading sequence, and the third spreading sequence to the first communication device, the second communication device, and the third communication device.

The fourth communication device may be a first communication device, a second communication device, a third communication device, or a third party network device. The first communication device may be a radio frequency source, the second communication device may be a backscatter communication transmitting device, the third communication device may be a backscatter communication receiving device, and the third party network device may be other devices than the radio frequency source, the backscatter communication transmitting device, and the backscatter communication receiving device, such as a base station, a relay device, a reader-writer device, or other terminal device, etc. In this embodiment of the present application, the fourth communication device may uniformly configure or indicate at least one of the first spreading sequence, the second spreading sequence, and the third spreading sequence to the first communication device, the second communication device, and the third communication device in a static or semi-static manner.

Alternatively, as an embodiment, the fourth communication device may configure or indicate the first spreading sequence to the first communication device, the second spreading sequence to the second communication device, and the third spreading sequence to the third communication device. The first spreading sequence is used for spreading an original signal by the first communication device to generate a first signal, the second spreading sequence is used for spreading a back-scattering modulation signal by the second communication device to generate a second signal, the back-scattering modulation signal is generated after the second communication device modulates and back-scatters the first signal, and the third spreading sequence is used for despreading the first signal and the second signal by the third communication device. Wherein, the detailed description about the first spreading sequence, the second spreading sequence and the third spreading sequence may refer to the corresponding content in the embodiments of fig. 2 to 4, the specific implementation of the first communication device for generating the first signal based on the first spreading sequence indicated by the fourth communication device may refer to the embodiment shown in fig. 3, the specific implementation of the second communication device for generating the second signal based on the second spreading sequence indicated by the fourth communication device may refer to the embodiment shown in fig. 4, and the specific implementation of the third communication device for despreading based on the third spreading sequence indicated by the fourth communication device may refer to the embodiment shown in fig. 5, which will not be described in detail herein.

It should be noted that, in other implementations, the spreading sequences configured by the fourth communication device to the first communication device may be other combinations. For example, the fourth communication device may configure or indicate a first spreading sequence to the first communication device, a second spreading sequence to the second communication device, and both the first spreading sequence and the second spreading sequence to the third communication device. And are not illustrated here.

Alternatively, as an embodiment, the fourth communication device may configure or indicate at least one of the first spreading sequence, the second spreading sequence, and the third spreading sequence to the first communication device, the second communication device, and the third communication device through at least one of RRC signaling, MAC CE, DCI, SCI, or a preamble sequence.

Alternatively, as an embodiment, the fourth communications device may specifically configure or indicate the sequence type and the sequence length of the first spreading sequence when configuring or indicating the first spreading sequence, may specifically configure or indicate the sequence type and the sequence length of the second spreading sequence when configuring or indicating the second spreading sequence, and may specifically configure or indicate the sequence type and the sequence length of the third spreading sequence when configuring or indicating the third spreading sequence. Wherein the sequence type of the first spreading sequence is different from the sequence type of the second spreading sequence, and the third spreading sequence is the Kronecker product of the first spreading sequence and the second spreading sequence. The sequence type of the first spreading sequence or the sequence type of the second spreading sequence may be any one of an m-sequence, a Gold sequence, a Walsh sequence, a PN sequence, a Bent sequence, a Kasami sequence, a sequence zero correlation zone sequence ZCZ, a polyphase orthogonal sequence, a perfect complementary code, and a chaotic sequence, and in addition, may be other sequence types, so long as the sequence type of the first spreading sequence and the sequence type of the second spreading sequence are ensured to be different.

In this embodiment of the present application, the fourth communication device may uniformly configure or indicate spreading sequences used by each of the first communication device, the second communication device, and the third communication device, where the first communication device may perform spreading on an original signal based on the indicated first spreading sequence to obtain a first signal and send the first signal to the second communication device when sending a signal to the second communication device, the second communication device may generate a second signal according to the backscatter signal and the indicated second spreading sequence when sending a backscatter signal to the third communication device, and send the second signal to the third communication device, and the third communication device may perform despreading on the first signal and the second signal according to the indicated third spreading sequence after receiving the first signal and the second signal. Because the first signal and the second signal are both signals processed by the spreading sequence, when the third communication device despreads the first signal and the second signal based on the spreading sequence, the third communication device can eliminate the interference signal and recover the useful backscatter signal based on the characteristics of the spreading sequence, so as to effectively eliminate the interference signal, ensure the communication performance of backscatter communication, and improve the transmission efficiency, transmission distance and reliability of backscatter communication.

In the technical solution provided in the embodiment of the present application, spreading sequences used by the first communication device, the second communication device, and the third communication device may be configured or indicated in a static or semi-static manner, or may also be indicated in a dynamic manner. For ease of understanding, reference may be made to fig. 7 and 8.

Fig. 7 is a schematic flow chart of a signal processing method according to an embodiment of the present application. In the embodiment shown in fig. 7, the spreading sequences used by the first communication device, the second communication device, and the third communication device may be configured or indicated in a static or semi-static manner, and may specifically include the following steps.

S701: the fourth communication device configures a first spreading sequence to the first communication device, configures a second spreading sequence to the second communication device, and configures a third spreading sequence to the third communication device.

The fourth communication device may be a first communication device, a second communication device, a third communication device, or a third party network device. The fourth communication device may configure the sequence type and the sequence length of the first spreading sequence to the first communication device through the first indication information, configure the sequence type and the sequence length of the second spreading sequence to the second communication device through the third indication information, and configure the sequence type and the sequence length of the third spreading sequence to the third communication device through the fifth indication information. The first spreading sequence and the second spreading sequence are different in sequence type, the third spreading sequence is Kronecker product of the first spreading sequence and the second spreading sequence, and the sequence type of the first spreading sequence or the second spreading sequence can be any one of m sequence, gold sequence, walsh sequence, PN sequence, bent sequence, kasami sequence, sequence zero correlation zone sequence ZCZ, multiphase orthogonal sequence, complete complementary code and chaotic sequence.

S702: the first communication device determines a first spreading sequence based on the first indication information.

S703: the first communication device spreads the original signal according to the first spreading sequence to generate a first signal.

S704: the first communication device transmits a first signal to the second communication device.

S705: the second communication device determines a second spreading sequence according to the third indication information.

S706: the second communication device generates a second signal based on the second spreading sequence and the backscatter modulation signal.

The backscatter modulation signal is generated by modulating and backscatter the first signal by the second communication device.

S707: the second communication device transmits a second signal to the third communication device.

S708: the third communication device receives the first signal and the second signal.

S709: the third communication device determines a third spreading sequence based on the fifth indication information.

S710: the third communication device despreads the first signal and the second signal according to the third spreading sequence.

The specific implementation of S701 to S710 described above may refer to the specific implementation of the corresponding steps in the embodiments shown in fig. 3 to 6, and will not be described in detail here.

Fig. 8 is a schematic flow chart of a signal processing method according to an embodiment of the present application. In the embodiment shown in fig. 8, the spreading sequences used by the first communication device, the second communication device, and the third communication device may be indicated in a dynamic manner, and specifically may include the following steps.

S801: the first communication device determines a first spreading sequence based on the first indication information.

The first indication information may be indicated by a fourth communication device, which may be the first communication device, the second communication device, the third communication device, or the third party network device.

S802: the first communication device spreads the original signal according to the first spreading sequence to generate a first signal.

S803: the first communication device transmits a first signal to the second communication device.

S804: the first communication device transmits second indication information to the second communication device and the third communication device, wherein the second indication information is used for indicating the sequence type and the sequence length of the first spread spectrum sequence.

In the case where the first communication device and the third communication device are the same device (single-base backscatter communication architecture), the first communication device may not need to transmit the second instruction information to the third communication device, and only the first communication device and the third communication device are not the same device.

S805: the second communication device determines a second spreading sequence based on the second indication information.

S806: the second communication device generates a second signal based on the second spreading sequence and the backscatter modulation signal.

S807: the second communication device transmits a second signal to the third communication device.

S808: the second communication device sends fourth indication information to the third communication device.

S809: the third communication device receives the first signal and the second signal.

S810: the third communication device determines a third target sequence according to the fourth indication information or determines a third spreading sequence according to the second indication information and the fourth indication information.

S811: the third communication device despreads the first signal and the second signal according to the third spreading sequence.

The specific implementation of S801 to S811 described above may be referred to the specific implementation of the corresponding steps in the embodiments shown in fig. 3 to 6, and will not be described in detail here.

In order to facilitate understanding of the technical solutions provided in the embodiments of the present application, a single-base backscatter communication architecture and a double-base backscatter communication architecture will be described below as examples, respectively.

Fig. 9 is a schematic diagram of a signal processing method according to an embodiment of the present application. The backscatter communication system shown in fig. 9 is a single-base backscatter communication architecture, and fig. 9 illustrates an example in which a fourth communication device configures or indicates a spread spectrum sequence to a first communication device, a second communication device, and a third communication device in a lump.

In fig. 9, the first communication device may use the first spreading sequence c configured or indicated by the fourth communication device when transmitting signals to the second communication device ₁ (k) Spreading the original signal generates a first signal, which can be expressed as:

/>

c ₁ (k) Is a spreading sequence of length M.

The first communication device may send the first signal to the second communication device after generating the first signal.

After the second communication device receives the first signal, the received first signal may be expressed as:

h ₁ representing a channel between the second communication device and the first communication device, n ₁ (k) Is a noise signal.

The second communication device performs backscatter modulation on the received signal with the baseband signal b (n) to generate a backscatter signal, and then based on a second spreading sequence c configured or indicated by the fourth communication device ₂ (l) Spreading the backscattered signal generates a second signal, which may be expressed as:

Wherein the second spreading sequence c ₂ (l) Length of N, c ₃ (p) is a composite spreading sequence of length MxN, i.e. a third spreading sequence, c, generated by multiplying the first spreading sequence and the second spreading sequence by Kronecker ₃ (p) can be expressed as:

the second communication device may send the second signal to the third communication device after generating the second signal.

The third communication device (i.e., the first communication device) may receive the first signal and the second signal when receiving the signals, and the received signals may be expressed as:

wherein, the first item in the signals comprises self-interference signals caused by carrier leakage and multipath interference signals caused by environmental multipath, and the second item is a signal item which is received by third communication equipment, is attenuated by a double-path link and modulates a back-scattered signal, and h ₃ Indicating the channel between the transmission and reception of the third communication device, h ₂ Representing the channel between the second communication device and the third communication device.

After receiving the first signal and the second signal, the third communication device may configure or instruct the third spreading sequence c according to the fourth communication device ₄ (p) despreading the first signal may be expressed in detail as:

/>

due to c ₄ (p) equals c ₃ (p) based on the autocorrelation and cross-correlation properties of the complex sequence, the first term in the above equation is zero, the second term only leaves h ₂ (n)b(n)h ₁ And (n) x (n), wherein the third term is a noise term, so that an interference signal is eliminated, and the baseband signal b (n) can be recovered by performing signal demodulation on the signal d (n) after interference elimination.

Fig. 10 is a schematic diagram of a signal processing method according to an embodiment of the present application. The backscatter communication system shown in fig. 10 is a bistatic backscatter communication architecture, and fig. 10 illustrates an example of a spread spectrum sequence dynamically indicating each of the first communication device, the second communication device, and the third communication device.

In fig. 10, the first communication device may autonomously select the first spreading sequence c according to the first indication information when transmitting a signal to the second communication device ₁ (k) Spreading the original signal generates a first signal, which can be expressed as:

c ₁ (k) Is a spreading sequence of length M.

After the first communication device generates the first signal, the first signal may be sent to the second communication device, and at the same time, second indication information is sent to the second communication device and the third communication device, where the second indication information is used to indicate a sequence type and a sequence length of the first spreading sequence.

The second communication device modulates and back-scatters the received signal with the baseband signal b (n) to generate a back-scattered signal, and then determines the second spreading sequence c according to the second indication information ₂ (l) And according to the second spread spectrum c ₂ (l) Spreading the backscattered signal generates a second signal, which may be expressed as:

the specific implementation manner of the second communication device in determining the second spreading sequence according to the second indication information may be referred to the embodiment shown in fig. 3, which is not described in detail herein. Second spreading sequence c ₂ (l) Length of N, c ₃ (p) is a composite spreading sequence of length MxN, i.e. a third spreading sequence, c, generated by multiplying the first spreading sequence and the second spreading sequence by Kronecker ₃ (p) can be expressed as:

after the second communication device generates the second signal, the second signal may be sent to the third communication device, and at the same time, fourth indication information may also be sent to the third communication device, where the fourth indication information is used to indicate a sequence type and a sequence length of the second spreading sequence, or a sequence type and a sequence length of a third spreading sequence, and the third spreading sequence is a Kronecker product of the first spreading sequence and the second spreading sequence.

The third communication device may receive the first signal and the second signal when receiving the signals, and the received signals may be expressed as:

wherein the first term in the signals is cross-link interference or direct link interference, the second term is a signal term of a backscatter signal of a cascade channel received by a third communication device, and h ₃ Indicating the channel between the third communication device and the first communication device, h ₂ Representing the channel between the second communication device and the third communication device.

After the third communication device receives the first signal and the second signal, the third spreading sequence may be determined according to the second indication information and the fourth indication information, or the third spreading sequence may be determined according to the fourth indication information, which is referred to as corresponding content in the embodiment shown in fig. 4, and will not be repeated here for a specific implementation. After determining the third spreading sequence, the first signal and the second signal may be despread according to the third spreading sequence, which may be specifically expressed as:

due to c ₄ (p) equals c ₃ (p) autocorrelation and cross-correlation based on complex sequencesCharacteristic, the first term in the above formula is zero, and the second term only leaves h ₂ (n)b(n)h ₁ And (n) x (n), wherein the third term is a noise term, so that an interference signal is eliminated, and the baseband signal b (n) can be recovered by performing signal demodulation on the signal d (n) after interference elimination.

In the signal processing method provided in the embodiment of the present application, the execution body may be a signal processing apparatus. In the embodiment of the present application, a signal processing device is described by taking a signal processing method performed by the signal processing device as an example.

Fig. 11 is a schematic structural diagram of a signal processing apparatus according to an embodiment of the present application, which may correspond to the first communication device in other embodiments. As shown in fig. 11, the apparatus 1100 includes the following modules.

A determining module 1101, configured to determine a first spreading sequence according to the first indication information;

a signal processing module 1102, configured to spread an original signal according to the first spreading sequence to generate a first signal;

a transmitting module 1103, configured to transmit the first signal to a second communication device, where the apparatus is a device that provides a radio frequency carrier wave source for the second communication device.

Optionally, as an embodiment, the first indication information is used to indicate a sequence type and a sequence length of the first spreading sequence.

Optionally, as an embodiment, the sequence type of the first spreading sequence includes any one of the following:

m sequence; gold sequences; a Walsh sequence; PN sequences; a bet sequence; a Kasami sequence; sequence zero correlation zone sequence ZCZ; a polyphase orthogonal sequence; a complete complementary code; a chaotic sequence.

Optionally, as an embodiment, the first indication information is configured or indicated by a fourth communication device, where the fourth communication device is a first communication device, the second communication device, a third communication device, or a third party network device.

Optionally, as an embodiment, in a case where the first indication information is configured or indicated by the fourth communication device and the fourth communication device is not the first communication device, the apparatus further includes a receiving module 1104, where the receiving module 1104 is configured to:

receiving the first indication information;

wherein the first indication information is configured or indicated by the fourth communication device through at least one mode of radio resource control RRC signaling, medium access control unit MAC CE, downlink control information DCI, side link control information SCI, and preamble sequence.

Optionally, as an embodiment, the sending module 1103 is further configured to:

transmitting second indication information to the second communication device and the third communication device when the first communication device and the third communication device are different devices;

transmitting the second indication information to the second communication device in the case that the first communication device and the third communication device are the same device;

Optionally, as an embodiment, the sending module 1103 is configured to:

the second indication information is transmitted through at least one of RRC signaling, MAC CE, DCI, SCI, and preamble sequence.

The apparatus 1100 according to the embodiment of the present application may refer to the flow of the method 300 corresponding to the embodiment of the present application, and each unit/module in the apparatus 1100 and the other operations and/or functions described above are respectively for implementing the corresponding flow in the method 300, and may achieve the same or equivalent technical effects, which are not described herein for brevity.

Fig. 12 is a schematic structural diagram of a signal processing apparatus according to an embodiment of the present application, which may correspond to the second communication device in other embodiments. As shown in fig. 12, the apparatus 1200 includes the following modules.

A receiving module 1201, configured to receive a first signal, where the first signal is generated by a first communication device after spreading an original signal according to a first spreading sequence;

a determining module 1202, configured to determine a second spreading sequence according to the third indication information;

a signal processing module 1203, configured to spread the backscatter modulation signal according to the second spreading sequence to generate a second signal, where the backscatter modulation signal is generated by modulating and backscattering the first signal;

A sending module 1204, configured to send the second signal to a third communication device.

Optionally, as an embodiment, the third indication information is indicated by the first communication device, and the third indication information is used to indicate a sequence type and a sequence length of the first spreading sequence; or alternatively, the first and second heat exchangers may be,

the third indication information is configured or indicated by a fourth communication device, where the fourth communication device is the first communication device, the second communication device, the third communication device or a third party network device, and the third indication information is used to indicate a sequence type and a sequence length of the second spreading sequence.

Optionally, as an embodiment, in a case where the third indication information is indicated by the first communication device, or in a case where the third indication information is configured or indicated by the fourth communication device and the fourth communication device is not the second communication device, the receiving module 1201 is further configured to:

receiving the third indication information;

wherein the third indication information is configured or indicated by at least one of RRC signaling, MAC CE, DCI, SCI, and preamble sequence.

Optionally, as an embodiment, the sequence type of the second spreading sequence is different from the sequence type of the first spreading sequence, and the sequence type of the second spreading sequence includes any one of the following:

Optionally, as an embodiment, the sending module 1204 is further configured to:

transmitting fourth indication information to the third communication equipment;

the fourth indication information is used for indicating the sequence type and the sequence length of the second spreading sequence or the sequence type and the sequence length of a third spreading sequence, wherein the third spreading sequence is a Kronecker product of the first spreading sequence and the second spreading sequence.

Optionally, as an embodiment, the sending module 1204 is configured to:

and sending the fourth indication information to the third communication equipment through at least one mode of RRC signaling, MAC CE, DCI, SCI and a preamble sequence.

The apparatus 1200 according to the embodiment of the present application may refer to the flow of the method 400 corresponding to the embodiment of the present application, and each unit/module in the apparatus 1200 and the other operations and/or functions described above are respectively for implementing the corresponding flow in the method 400, and may achieve the same or equivalent technical effects, which are not described herein for brevity.

Fig. 13 is a schematic structural diagram of a signal processing apparatus according to an embodiment of the present application, which may correspond to the third communication device in other embodiments. As shown in fig. 13, the apparatus 1300 includes the following modules.

A receiving module 1301, configured to receive a first signal and a second signal, where the first signal is generated by a first communication device after spreading an original signal according to a first spreading sequence, the second signal is generated by a second communication device after spreading a backscatter modulation signal according to a second spreading sequence, and the backscatter modulation signal is generated by the second communication device after modulating and backscattering the first signal;

a determining module 1302, configured to determine a third spreading sequence according to the fifth indication information;

and the signal processing module 1303 is configured to despread the first signal and the second signal according to the third spreading sequence.

Optionally, as an embodiment, the sequence type of the first spreading sequence and the sequence type of the second spreading sequence are different, and the third spreading sequence is a Kronecker (Kronecker) product of the first spreading sequence and the second spreading sequence;

Wherein the sequence type of the first spreading sequence or the sequence type of the second spreading sequence comprises any one of the following:

Optionally, as an embodiment, the fifth indication information is used to indicate a sequence type and a sequence length of the second spreading sequence, or a sequence type and a sequence length of the third spreading sequence.

Optionally, as an embodiment, in a case that the fifth indication information is used to indicate a sequence type and a sequence length of the second spreading sequence, the determining module 1302 is configured to:

determining the second spreading sequence according to the fifth indication information;

determining the first spread spectrum sequence according to sixth indication information, wherein the sixth indication information is used for indicating the sequence type and the sequence length of the first spread spectrum sequence;

and multiplying the first spreading sequence and the second spreading sequence by Kronecker to obtain the third spreading sequence.

Optionally, as an embodiment, the sixth indication information is indicated by the first communication device; or alternatively, the first and second heat exchangers may be,

The sixth indication information is configured or indicated by a fourth communication device, where the fourth communication device is the first communication device, the second communication device, the third communication device or a third party network device.

Optionally, as an embodiment, in a case where the sixth indication information is indicated by the first communication device and the first communication device is not the same device as the third communication device, or in a case where the sixth indication information is configured or indicated by the fourth communication device and the fourth communication device is not the third communication device, the receiving module 1301 is further configured to:

receiving the sixth indication information;

the sixth indication information is configured or indicated by at least one of RRC signaling, MAC CE, DCI, SCI, and a preamble sequence.

Optionally, as an embodiment, the fifth indication information is indicated by the second communication device, or,

the fifth indication information is configured or indicated by a fourth communication device, where the fourth communication device is the first communication device, the second communication device, the third communication device or a third party network device.

Optionally, as an embodiment, in a case where the fifth indication information is indicated by the second communication device or in a case where the fifth indication information is indicated by the fourth communication device configuration, and the fourth communication device is not the third communication device, the receiving module 1301 is further configured to:

receiving the fifth indication information;

wherein the fifth indication information is configured or indicated by at least one of RRC signaling, MAC CE, DCI, SCI, and preamble sequence.

The apparatus 1300 according to the embodiment of the present application may refer to the flow of the method 500 corresponding to the embodiment of the present application, and each unit/module in the apparatus 1300 and the other operations and/or functions described above are respectively for implementing the corresponding flow in the method 500, and may achieve the same or equivalent technical effects, which are not described herein for brevity.

Fig. 14 is a schematic structural diagram of a signal processing apparatus according to an embodiment of the present application, which may correspond to the fourth communication device in other embodiments. As shown in fig. 14, the apparatus 1400 includes the following modules.

A configuration module 1401 configured to configure or indicate at least one of the first spreading sequence, the second spreading sequence, and the third spreading sequence to the first communication device, the second communication device, and the third communication device;

Optionally, as an embodiment, the apparatus is the first communication device, the second communication device, the third communication device, or a third party network device.

Optionally, as an embodiment, the configuration module 1401 is configured to:

at least one of the first spreading sequence, the second spreading sequence and the third spreading sequence is configured or indicated by at least one of RRC signaling, MAC CE, DCI, SCI or preamble sequence.

Optionally, as an embodiment, the configuration module 1401 is configured to:

the sequence type and sequence length of the first spreading sequence, the sequence type and sequence length of the second spreading sequence, and the sequence type and sequence length of the third spreading sequence are configured or indicated.

Optionally, as an embodiment, the sequence type of the first spreading sequence and the sequence type of the second spreading sequence are different, and the third spreading sequence is Kronecker product of the first spreading sequence and the second spreading sequence;

The apparatus 1400 according to the embodiment of the present application may refer to the flow of the method 600 corresponding to the embodiment of the present application, and each unit/module in the apparatus 1400 and the other operations and/or functions described above are respectively for implementing the corresponding flow in the method 600, and may achieve the same or equivalent technical effects, which are not described herein for brevity.

The signal processing device in the embodiment of the present application may be an electronic device, for example, an electronic device with an operating system, or may be a component in an electronic device, for example, an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices than a terminal. By way of example, terminals may include, but are not limited to, the types of terminals 11 listed above, other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., and embodiments of the application are not specifically limited.

The signal processing device provided in the embodiment of the present application can implement each process implemented by the embodiments of the methods of fig. 3 to 6, and achieve the same technical effects, so that repetition is avoided, and no further description is provided herein.

Optionally, as shown in fig. 15, the embodiment of the present application further provides a communication device 1500, including a processor 1501 and a memory 1502, where the memory 1502 stores a program or instructions that can be executed on the processor 1501, for example, when the communication device 1500 is a terminal, the program or instructions implement the steps of the signal processing method embodiment described above when executed by the processor 1501, and achieve the same technical effects. When the communication device 1500 is a network-side device, the program or the instructions, when executed by the processor 1501, implement the steps of the signal processing method embodiment described above, and achieve the same technical effects, and in order to avoid repetition, will not be described herein.

The embodiment of the application also provides communication equipment, which comprises a processor and a communication interface, wherein the processor is used for determining a first spread spectrum sequence according to first indication information; spreading the original signal according to the first spreading sequence to generate a first signal; the communication interface is used for sending the first signal to a second communication device, and the communication device is a device for providing a radio frequency carrier wave source for the second communication device; or, the communication interface is configured to receive a first signal, where the first signal is generated after the first communication device spreads an original signal according to a first spreading sequence; the processor is used for determining a second spread spectrum sequence according to the third indication information; spreading a back-scattering modulation signal according to the second spreading sequence to generate a second signal, wherein the back-scattering modulation signal is generated by modulating and back-scattering the first signal; the communication interface is used for sending the second signal to third communication equipment; or the communication interface is used for receiving a first signal and a second signal, the first signal is generated after the first communication equipment spreads the original signal according to a first spreading sequence, the second signal is generated after the second communication equipment spreads a back scattering modulation signal according to a second spreading sequence, and the back scattering modulation signal is generated after the second communication equipment modulates and back scatters the first signal; the processor is used for determining a third spread spectrum sequence according to fifth indication information; despreading the first signal and the second signal according to the third spreading sequence; or, the communication interface is configured to configure or indicate at least one of the first spreading sequence, the second spreading sequence, and the third spreading sequence to the first communication device, the second communication device, and the third communication device; the first spreading sequence is used for spreading an original signal by the first communication device to generate a first signal, the second spreading sequence is used for spreading a back-scattering modulation signal by the second communication device to generate a second signal, the back-scattering modulation signal is generated after modulating and back-scattering the first signal, and the third spreading sequence is used for despreading the first signal and the second signal by the third communication device. The communication device embodiment corresponds to the first communication device side method embodiment, or corresponds to the second communication device side method embodiment, or corresponds to the third communication device side method embodiment, or corresponds to the fourth communication device side method embodiment, and each implementation process and implementation manner of the method embodiment are applicable to the communication device embodiment, and the same technical effect can be achieved. Specifically, fig. 16 is a schematic diagram of a hardware structure of a communication device implementing an embodiment of the present application.

The communication device 1600 includes, but is not limited to: at least some of the components of the antenna unit 1601, the network module 1602, the audio output unit 1603, the input unit 1604, the sensor 1605, the display unit 1606, the user input unit 1607, the interface unit 1608, the memory 1609, the processor 1610, and the like.

Those skilled in the art will appreciate that the communication device 1600 may also include a power source (e.g., a battery) for powering the various components, which may be logically connected to the processor 1610 by a power management system that performs the functions of managing charge, discharge, and power consumption. The communication device structure shown in fig. 16 does not constitute a limitation of the communication device, and the communication device may include more or less components than shown, or may combine certain components, or may be arranged in different components, which are not described in detail herein.

It should be appreciated that in embodiments of the present application, the input unit 1604 may include a graphics processing unit (Graphics Processing Unit, GPU) 16041 and a microphone 16042, with the graphics processor 16041 processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The display unit 1606 may include a display panel 16061, and the display panel 16061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 1607 includes at least one of a touch panel 16071 and other input devices 16072. The touch panel 16071, also referred to as a touch screen. The touch panel 16071 may include two parts, a touch detection device and a touch controller. Other input devices 16072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and so forth, which are not described in detail herein.

In this embodiment, after receiving downlink data from the network side device, the antenna unit 1601 may transmit the downlink data to the processor 1610 for processing; in addition, the antenna unit 1601 may transmit uplink data to the network-side device. Generally, antenna unit 1601 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

Memory 1609 may be used to store software programs or instructions and various data. The memory 1609 may mainly include a first memory area storing programs or instructions and a second memory area storing data, wherein the first memory area may store an operating system, application programs or instructions (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. Further, memory 1609 may include volatile memory or nonvolatile memory, or memory 1609 may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM), static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (ddr SDRAM), enhanced SDRAM (Enhanced SDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DRRAM). Memory 1609 in embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

Processor 1610 may include one or more processing units; optionally, processor 1610 integrates an application processor that primarily handles operations related to operating systems, user interfaces, applications, etc., and a modem processor that primarily handles wireless communication signals, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 1610.

Wherein the processor 1610 is configured to determine a first spreading sequence according to the first indication information; spreading the original signal according to the first spreading sequence to generate a first signal; the antenna unit 1601 is configured to send the first signal to a second communication device, where the second communication device is provided with a radio frequency carrier wave source; or alternatively, the first and second heat exchangers may be,

the antenna unit 1601 is configured to receive a first signal, where the first signal is generated by a first communication device after spreading an original signal according to a first spreading sequence; the processor 1610 is configured to determine a second spreading sequence according to the third indication information; spreading a back-scattering modulation signal according to the second spreading sequence to generate a second signal, wherein the back-scattering modulation signal is generated by modulating and back-scattering the first signal; the antenna unit 1601 is configured to send the second signal to a third communication device; or alternatively, the first and second heat exchangers may be,

The antenna unit 1601 is configured to receive a first signal and a second signal, where the first signal is generated by a first communication device after spreading an original signal according to a first spreading sequence, the second signal is generated by a second communication device after spreading a backscatter modulation signal according to a second spreading sequence, and the backscatter modulation signal is generated by the second communication device after modulating and backscattering the first signal; the processor 1610 is configured to determine a third spreading sequence according to the fifth indication information; despreading the first signal and the second signal according to the third spreading sequence; or alternatively, the first and second heat exchangers may be,

the antenna unit 1601 is configured to configure or indicate at least one of the first spreading sequence, the second spreading sequence, and the third spreading sequence to the first communication device, the second communication device, and the third communication device; the first spreading sequence is used for spreading an original signal by the first communication device to generate a first signal, the second spreading sequence is used for spreading a back-scattering modulation signal by the second communication device to generate a second signal, the back-scattering modulation signal is generated after modulating and back-scattering the first signal, and the third spreading sequence is used for despreading the first signal and the second signal by the third communication device.

The embodiment of the application also provides communication equipment, which comprises a processor and a communication interface, wherein the processor is used for determining a first spread spectrum sequence according to first indication information; spreading the original signal according to the first spreading sequence to generate a first signal; the communication interface is used for sending the first signal to a second communication device, and the communication device is a device for providing a radio frequency carrier wave source for the second communication device; or, the communication interface is configured to receive a first signal, where the first signal is generated after the first communication device spreads an original signal according to a first spreading sequence; the processor is used for determining a second spread spectrum sequence according to the third indication information; spreading a back-scattering modulation signal according to the second spreading sequence to generate a second signal, wherein the back-scattering modulation signal is generated by modulating and back-scattering the first signal; the communication interface is used for sending the second signal to third communication equipment; or the communication interface is used for receiving a first signal and a second signal, the first signal is generated after the first communication equipment spreads the original signal according to a first spreading sequence, the second signal is generated after the second communication equipment spreads a back scattering modulation signal according to a second spreading sequence, and the back scattering modulation signal is generated after the second communication equipment modulates and back scatters the first signal; the processor is used for determining a third spread spectrum sequence according to fifth indication information; despreading the first signal and the second signal according to the third spreading sequence; or, the communication interface is configured to configure or indicate at least one of the first spreading sequence, the second spreading sequence, and the third spreading sequence to the first communication device, the second communication device, and the third communication device; the first spreading sequence is used for spreading an original signal by the first communication device to generate a first signal, the second spreading sequence is used for spreading a back-scattering modulation signal by the second communication device to generate a second signal, the back-scattering modulation signal is generated after modulating and back-scattering the first signal, and the third spreading sequence is used for despreading the first signal and the second signal by the third communication device. The communication device embodiment corresponds to the first communication device side method embodiment, or corresponds to the second communication device side method embodiment, or corresponds to the third communication device side method embodiment, or corresponds to the fourth communication device side method embodiment, and each implementation process and implementation manner of the method embodiment are applicable to the communication device embodiment, and the same technical effect can be achieved.

Specifically, the embodiment of the application also provides communication equipment. As shown in fig. 17, the communication apparatus 1700 includes: an antenna 171, a radio frequency device 172, a baseband device 173, a processor 174, and a memory 175. The antenna 171 is connected to a radio frequency device 172. In the uplink direction, the radio frequency device 172 receives information via the antenna 171, and transmits the received information to the baseband device 173 for processing. In the downlink direction, the baseband device 173 processes information to be transmitted, and transmits the processed information to the radio frequency device 172, and the radio frequency device 172 processes the received information and transmits the processed information through the antenna 171.

The methods performed by the first communication device, the second communication device, the third communication device, and the fourth communication device in the above embodiments may be implemented in a baseband apparatus 173, where the baseband apparatus 173 includes a baseband processor.

The baseband apparatus 173 may, for example, include at least one baseband board, on which a plurality of chips are disposed, as shown in fig. 17, where one chip, for example, a baseband processor, is connected to the memory 175 through a bus interface, so as to call a program in the memory 175 to perform the operation of the communication device shown in the above method embodiment.

The communication device may also include a network interface 176, such as a common public radio interface (common public radio interface, CPRI).

Specifically, the communication device 1700 of the embodiment of the present invention further includes: instructions or programs stored in the memory 175 and executable on the processor 174, the processor 174 invokes the instructions or programs in the memory 175 to perform the methods performed by the modules shown in fig. 11-14 to achieve the same technical result, and are not repeated here.

The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the embodiment of the signal processing method, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.

Wherein the processor is a processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.

The embodiment of the application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled with the processor, and the processor is used for running a program or an instruction, so as to implement each process of the signal processing method embodiment, and achieve the same technical effect, so that repetition is avoided, and no redundant description is provided here.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

The embodiments of the present application further provide a computer program/program product, where 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 each process of the foregoing signal processing method embodiment, and the same technical effects are achieved, so that repetition is avoided, and details are not repeated herein.

The embodiment of the application also provides a signal processing system, which comprises: at least two of a first communication device, a second communication device, a third communication device and a fourth communication device, the first communication device being operable to perform the steps of the signal processing method as shown in fig. 3 described above, the second communication device being operable to perform the steps of the signal processing method as shown in fig. 4 described above, the third communication device being operable to perform the steps of the signal processing method as shown in fig. 5 described above, and the fourth communication device being operable to perform the steps of the signal processing method as shown in fig. 6 described above.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solutions of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), comprising several instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method described in the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.

Claims

1. A signal processing method, comprising:

2. The method of claim 1, wherein first indication information is used to indicate a sequence type and a sequence length of the first spreading sequence.

3. The method of claim 1, wherein the sequence type of the first spreading sequence comprises any one of:

m sequence; gold sequences; a Walsh sequence; a pseudo-random noise PN sequence; a bet sequence; a Kasami sequence; sequence zero correlation zone sequence ZCZ; a polyphase orthogonal sequence; a complete complementary code; a chaotic sequence.

4. The method of claim 1, wherein the first indication information is configured or indicated by a fourth communication device, the fourth communication device being the first communication device, the second communication device, a third communication device, or a third party network device.

5. The method of claim 4, wherein, in the case where the first indication information is configured or indicated by the fourth communication device and the fourth communication device is not the first communication device, the first communication device determines a first spreading sequence according to the first indication information, the method further comprises:

receiving the first indication information;

6. The method according to claim 4, wherein the method further comprises:

in the case that the first communication device and the third communication device are different devices, the first communication device sends second indication information to the second communication device and the third communication device;

the first communication device sends the second indication information to the second communication device under the condition that the first communication device and the third communication device are the same device;

7. The method of claim 6, wherein the first communication device transmitting the second indication information comprises:

the first communication device transmits the second indication information through at least one of RRC signaling, MAC CE, DCI, SCI, and preamble sequence.

8. A signal processing method, comprising:

9. The method of claim 8, wherein the step of determining the position of the first electrode is performed,

the third indication information is indicated by the first communication device, and is used for indicating the sequence type and the sequence length of the first spread spectrum sequence; or alternatively, the first and second heat exchangers may be,

10. The method of claim 9, wherein in the case where the third indication information is indicated by the first communication device or in the case where the third indication information is configured or indicated by the fourth communication device and the fourth communication device is not the second communication device, the method further comprises:

receiving the third indication information;

11. The method of claim 8, wherein the second spreading sequence has a different sequence type than the first spreading sequence, and wherein the second spreading sequence has a sequence type comprising any one of:

12. The method of claim 8, wherein the method further comprises:

13. The method of claim 12, wherein transmitting fourth indication information to the third communication device comprises:

14. A signal processing method, comprising:

15. The method of claim 14, wherein the step of providing the first information comprises,

the sequence type of the first spreading sequence is different from the sequence type of the second spreading sequence, and the third spreading sequence is the Kronecker product of the first spreading sequence and the second spreading sequence;

16. The method of claim 14, wherein the step of providing the first information comprises,

the fifth indication information is used for indicating the sequence type and the sequence length of the second spreading sequence or the sequence type and the sequence length of the third spreading sequence.

17. The method of claim 16, wherein in the case where the fifth indication information is used to indicate the sequence type and the sequence length of the second spreading sequence, the third communication device determining a third spreading sequence according to the fifth indication information comprises:

18. The method of claim 17, wherein the sixth indication information is indicated by the first communication device; or alternatively, the first and second heat exchangers may be,

19. The method of claim 18, wherein in the case where the sixth indication information is indicated by the first communication device and the first communication device is not the same device as the third communication device, or in the case where the sixth indication information is configured or indicated by the fourth communication device and the fourth communication device is not the third communication device, the method further comprises:

Receiving the sixth indication information;

20. The method of claim 14, wherein the fifth indication information is indicated by the second communication device, or,

21. The method of claim 20, wherein if the fifth indication information is indicated by the second communication device or if the fifth indication information is indicated by the fourth communication device configuration and the fourth communication device is not the third communication device, the method further comprises:

receiving the fifth indication information;

22. A signal processing method, comprising:

23. The method of claim 22, wherein the step of determining the position of the probe is performed,

the fourth communication device is the first communication device, the second communication device, the third communication device or a third party network device.

24. The method of claim 22, wherein the step of determining the position of the probe is performed,

the fourth communication device configures or indicates at least one of the first spreading sequence, the second spreading sequence, and the third spreading sequence by at least one of RRC signaling, MAC CE, DCI, SCI, or preamble sequence.

25. The method of claim 22, wherein the step of determining the position of the probe is performed,

the fourth communication device configures or indicates a sequence type and a sequence length of the first spreading sequence, a sequence type and a sequence length of the second spreading sequence, and a sequence type and a sequence length of the third spreading sequence.

26. The method of claim 25, wherein the step of determining the position of the probe is performed,

27. A signal processing apparatus, comprising:

28. The apparatus of claim 27, wherein first indication information is used to indicate a sequence type and a sequence length of the first spreading sequence, the sequence type of the first spreading sequence comprising any one of:

29. The apparatus of claim 27, wherein the first indication information is configured or indicated by a fourth communication device, the fourth communication device being a first communication device, the second communication device, a third communication device, or a third party network device.

30. A signal processing apparatus, comprising:

31. The apparatus of claim 30, wherein the device comprises a plurality of sensors,

32. The apparatus of claim 30, wherein the second spreading sequence has a different sequence type than the first spreading sequence, and wherein the second spreading sequence has a sequence type comprising any one of:

33. A signal processing apparatus, comprising:

34. The apparatus of claim 33, wherein the device comprises a plurality of sensors,

wherein the sequence type of the first spreading sequence or the second spreading sequence comprises any one of the following:

35. The apparatus of claim 33, wherein the device comprises a plurality of sensors,

36. A signal processing apparatus, comprising:

37. The apparatus of claim 36, wherein the configuration module is configured to:

38. The apparatus of claim 36, wherein the configuration module is configured to:

39. A communication device comprising a processor and a memory storing a program or instructions executable on the processor, the program or instructions implementing the steps of the signal processing method according to any one of claims 1 to 7, or the steps of the signal processing method according to any one of claims 8 to 13, or the steps of the signal processing method according to any one of claims 14 to 21, or the steps of the signal processing method according to any one of claims 22 to 26, when executed by the processor.

40. A readable storage medium, characterized in that the readable storage medium stores thereon a program or instructions which, when executed by a processor, implements the steps of the signal processing method according to any one of claims 1 to 7, or the steps of the signal processing method according to any one of claims 8 to 13, or the steps of the signal processing method according to any one of claims 14 to 21, or the steps of the signal processing method according to any one of claims 22 to 26.