Signal transmission method, information configuration method and apparatus, and communication device

Abstract

The present application belongs to the technical field of communications. Disclosed are a signal transmission method, an information configuration method and apparatus, and a communication device. The signal transmission method in the embodiments of the present application comprises: a first device generating a first signal on the basis of first information, wherein the first signal is a baseband modulation signal; generating a second signal on the basis of the first signal and a received radio frequency carrier signal, wherein the radio frequency carrier signal is a single-tone signal, the second signal is a single-sideband backscatter modulation signal, and the bandwidth of the first signal is the same as the bandwidth of the second signal; and sending the second signal.

Description

Signal transmission method, information configuration method, device and communication equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese Patent Application No. 202410237707.8 filed in China on March 1, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application belongs to the field of communication technology, and specifically relates to a signal transmission method, an information configuration method, an apparatus and a communication device. Background Art

[0004] In related technologies, modulation techniques used in backscatter communications include, but are not limited to, double-sideband modulation (DSB), envelope modulation or amplitude modulation (AM), and single-sideband (SSB) modulation. SSB modulation not only saves carrier power but also reduces the transmission bandwidth by half compared to double-sideband modulation (DSB). Therefore, SSB modulation is an important modulation technique. Therefore, implementing single-sideband baseband modulation-based signal transmission in backscatter communications is an urgent problem to be solved. Summary of the Invention

[0005] The embodiments of the present application provide a signal transmission method, an information configuration method, an apparatus, and a communication device, which can solve the problem of how to implement signal transmission based on single-sideband baseband modulation in backscatter communication.

[0006] In a first aspect, a signal transmission method is provided, which is performed by a first device. The method includes:

[0007] The first device generates a first signal according to the first information, where the first signal is a baseband modulated signal;

[0008] The first device generates a second signal based on the first signal and a received radio frequency carrier signal; wherein the radio frequency carrier signal is a single-tone signal, the second signal is a single-sideband backscatter modulated signal, and the bandwidth of the first signal is the same as the bandwidth of the second signal;

[0009] The first device sends the second signal.

[0010] In a second aspect, a signal transmission method is provided, which is performed by a second device. The method includes:

[0011] The second device performs the first operation according to the second information;

[0012] Among them, the first operation at least includes: receiving a second signal sent by the first device and demodulating the second signal; the second signal is a single-sideband backscatter modulation signal, the second signal is generated based on the first signal and the radio frequency carrier signal, the first signal is a baseband modulation signal, the bandwidth of the first signal is the same as the bandwidth of the second signal, and the radio frequency carrier signal is a single-tone signal.

[0013] According to a third aspect, an information configuration method is provided, which is performed by a fifth device. The method includes:

[0014] The fifth device performs a second operation;

[0015] The second operation includes at least one of the following: sending the first information to the first device, sending the second information or the third information to the second device, and sending the third information to the third device;

[0016] Among them, the first information is used to generate a baseband modulation signal, generate a second signal or send a second signal; the second information is used to receive or demodulate the second signal, and the third information is used to generate or transmit a radio frequency carrier signal; the second signal is a single-sideband backscatter modulation signal, and the second signal is generated based on the first signal and the radio frequency carrier signal. The first signal is a baseband modulation signal, the bandwidth of the first signal is the same as the bandwidth of the second signal, and the radio frequency carrier signal is a single-tone signal.

[0017] In a fourth aspect, a signal transmission apparatus is provided, applied to a first device, including:

[0018] A first generating module, configured to generate a first signal according to the first information, where the first signal is a baseband modulated signal;

[0019] A second generating module, configured to generate a second signal based on the first signal and a received radio frequency carrier signal; wherein the radio frequency carrier signal is a single-tone signal, the second signal is a single-sideband backscatter modulated signal, and the bandwidth of the first signal is the same as the bandwidth of the second signal;

[0020] A sending module is used to send the second signal.

[0021] In a fifth aspect, a signal transmission apparatus is provided, applied to a second device, including:

[0022] A first execution module, configured to execute a first operation according to the second information;

[0023] Among them, the first operation at least includes: receiving a second signal sent by the first device and demodulating the second signal; the second signal is a single-sideband backscatter modulation signal, the second signal is generated based on the first signal and the radio frequency carrier signal, the first signal is a baseband modulation signal, the bandwidth of the first signal is the same as the bandwidth of the second signal, and the radio frequency carrier signal is a single-tone signal.

[0024] In a sixth aspect, an information configuration apparatus is provided, applied to the fifth device, including:

[0025] A second execution module, configured to execute a second operation;

[0026] The second operation includes at least one of the following: sending the first information to the first device, sending the second information or the third information to the second device, and sending the third information to the third device;

[0027] Among them, the first information is used to generate a baseband modulation signal, generate a second signal or send a second signal; the second information is used to receive or demodulate the second signal, and the third information is used to generate or transmit a radio frequency carrier signal; the second signal is a single-sideband backscatter modulation signal, and the second signal is generated based on the first signal and the radio frequency carrier signal. The first signal is a baseband modulation signal, the bandwidth of the first signal is the same as the bandwidth of the second signal, and the radio frequency carrier signal is a single-tone signal.

[0028] In the seventh aspect, a communication device is provided, which includes a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, it implements the steps of the method described in the first aspect, or implements the steps of the method described in the second aspect, or implements the steps of the method described in the third aspect.

[0029] In an eighth aspect, a communication device is provided, comprising a processor and a communication interface, wherein when the communication device is a first device, the processor is used to generate a first signal according to first information, the first signal being a baseband modulation signal, and a second signal being generated according to the first signal and a received radio frequency carrier signal, the radio frequency carrier signal being a single-tone signal, the second signal being a single-sideband backscatter modulation signal, and the communication interface being used to send the second signal; or, when the communication device is a second device, the processor is used to perform a first operation according to the second information; the first operation at least includes: receiving a second signal sent by the first device, and demodulating the second signal; the second signal being a single-sideband backscatter modulation signal, the second signal being generated according to the first signal and the radio frequency carrier signal, and the first signal is a baseband modulated signal, and the radio frequency carrier signal is a single-tone signal; or, when the communication device is a fifth device, the communication interface is used to perform a second operation; the second operation includes at least one of the following: sending first information to the first device, sending second information or third information to the second device, and sending third information to the third device; the first information is used to generate a baseband modulated signal, generate a second signal, or send a second signal; the second information is used to receive or demodulate the second signal, and the third information is used to generate or transmit the radio frequency carrier signal; the second signal is a single-sideband backscatter modulated signal, and the second signal is generated based on the first signal and the radio frequency carrier signal, the first signal is a baseband modulated signal, and the radio frequency carrier signal is a single-tone signal; the bandwidth of the first signal is the same as the bandwidth of the second signal.

[0030] In the ninth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented, or the steps of the method described in the third aspect are implemented.

[0031] In the tenth aspect, a wireless communication system is provided, comprising at least two of a first device, a second device and a fifth device, wherein the first device can be used to execute the steps of the method described in the first aspect, the second device can be used to execute the steps of the method described in the second aspect, and the fifth device can be used to execute the steps of the method described in the third aspect.

[0032] In the eleventh aspect, a chip is provided, which includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps of the method described in the first aspect, or the steps of the method described in the second aspect, or the steps of the method described in the third aspect.

[0033] In the twelfth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the steps of the method described in the first aspect, or the steps of the method described in the second aspect, or the steps of the method described in the third aspect.

[0034] In an embodiment of the present application, a first device can generate a first signal based on first information, where the first signal is a baseband modulation signal. A second signal can be generated based on the first signal and a received radio frequency carrier signal, and the second signal can be sent. The radio frequency carrier signal is a single-tone signal, and the second signal is a single-sideband backscatter modulation signal. The bandwidth of the first signal is the same as the bandwidth of the second signal, thereby realizing signal transmission based on single-sideband baseband modulation in backscatter communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figures 1A, 1B, 1C, 1D, and 1E are diagrams of a communication architecture based on backscattering in an embodiment of the present application;

[0036] FIG2 is a flow chart of a signal transmission method provided in an embodiment of the present application;

[0037] FIG3 is a flow chart of another signal transmission method provided in an embodiment of the present application;

[0038] FIG4 is a flowchart of an information configuration method provided in an embodiment of the present application;

[0039] FIG5 is a schematic diagram of a modulation method in Example 1 of the present application;

[0040] FIG6 is a schematic diagram of a modulation method in Example 2 of the present application;

[0041] FIG7 is a schematic diagram of a modulation method in Example 3 of the present application;

[0042] 8A, 8B, 8C and 8D are schematic diagrams of the network deployment architecture in Example 5 of the present application;

[0043] FIG9 is a schematic diagram of the signaling configuration process in Example 6 of the present application;

[0044] FIG10 is a schematic structural diagram of a signal transmission device provided in an embodiment of the present application;

[0045] FIG11 is a schematic structural diagram of another signal transmission device provided in an embodiment of the present application;

[0046] FIG12 is a schematic structural diagram of an information configuration device provided in an embodiment of the present application;

[0047] FIG13 is a schematic structural diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0048] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0049] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects, for example, the first object can be one or more. In addition, "or" in this application represents at least one of the connected objects. For example, "A or B" covers three options, namely, Option 1: including A but not including B; Option 2: including B but not including A; Option 3: including both A and B. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0050] The term "indication" in this application can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, the operation to be performed, or the requested result, etc. in the instruction sent; an indirect indication can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the operation to be performed or the requested result, etc. based on the judgment result.

[0051] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the technology described can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) systems. th Generation, 6G) communication system.

[0052] In order to facilitate understanding of the embodiments of the present application, the following contents are first described.

[0053] Backscatter Communication (BSC) refers to a type of passive IoT device that uses radio frequency signals from other devices or the environment to modulate signals and transmit information. The basic building blocks and main functions of a backscatter communication transmitter include:

[0054] -Antenna unit: used to receive RF signals and control commands, and also used to send modulated backscattered signals.

[0055] Energy harvesting module or power supply module: This module is used by the backscatter communication device to harvest RF energy or other energy sources, including but not limited to solar energy, kinetic energy, mechanical energy, and thermal energy. In addition to the energy harvesting module, a battery power supply module may also be included, making the backscatter communication device semi-passive. The energy harvesting module or power supply module provides power to all other modules in the device.

[0056] -Microcontroller: includes control of baseband signal processing, energy storage or data scheduling status, switch switching, system synchronization, etc.

[0057] -Signal receiving module: used to demodulate control commands or data sent by the backscatter communication receiving end or other network nodes.

[0058] - Coding and modulation module: performs channel coding and signal modulation under the control of the controller, and realizes modulation by selecting different load impedances under the control of the controller through the selection switch.

[0059] -Memory or sensor module: used to store device identification information, location information or sensor data, etc.

[0060] In addition to the typical components mentioned above, future backscatter communication transmitters can also integrate tunnel diode amplifier modules, low-noise amplifier modules, etc. to improve the receiving sensitivity and transmission power of the transmitter.

[0061] Optionally, the basic building blocks and main functions of the backscatter communication receiving end include:

[0062] -Antenna unit: used to receive the modulated backscattered signal.

[0063] - Backscatter signal detection module: used to detect the backscatter signal sent by the backscatter communication transmitter, including but not limited to amplitude shift keying (ASK) detection, phase shift keying (PSK) detection, frequency shift keying (FSK) detection or quadrature amplitude modulation (QAM) detection, etc.

[0064] -Demodulation and decoding module: demodulates and decodes the detected signal to restore the original information stream.

[0065] Backscatter communication equipment controls the reflection coefficient Γ of the modulation circuit by adjusting its internal impedance, thereby changing the amplitude, frequency, phase, etc. of the incident signal to achieve signal modulation. The reflection coefficient Γ can be expressed as:

[0066] Where Z0 is the antenna characteristic impedance; Z1 is the load impedance; j represents a complex number, θ T Indicates the phase. Assume that the incident signal is represented by S in (t), the output signal is Therefore, by properly controlling the reflection coefficient, corresponding amplitude modulation, frequency modulation, or phase modulation can be achieved. Based on this, backscatter communication devices can be tags in traditional radio frequency identification (RFID) or passive or semi-passive Internet of Things (IoT) devices. Here, backscatter communication devices are collectively referred to as BSC devices.

[0067] In one implementation, tags can be categorized into the following types based on their capabilities and source:

[0068] -C1 / C2 tags: Passive tags, which receive energy from electromagnetic waves sent by RFID readers and send data through backscatter communication.

[0069] -C3 tag: A semi-passive tag uses its own battery and other energy sources only for the circuitry within the RFID tag. It does not actively send data signals. It can only send data via backscatter communication after being activated by electromagnetic waves sent by the RFID reader.

[0070] -C4 tag: Active tag, which actively sends data by relying on its own battery or other energy source.

[0071] In another implementation, tags can be divided into:

[0072] Device A: The tag is passive and has no energy storage capacitor or battery. It relies on radio frequency (RF) signals for power. The received RF signal is the power signal for the rectifier. It does not have carrier generation capability and relies on RF as the RF carrier for backscatter communication transmission, thus minimizing power consumption.

[0073] Device B: This tag is semi-passive and has a capacitor / battery for energy storage. It relies on non-RF signals for power. It may also have a power amplifier (PA) / low-noise amplifier (LNA) or other active components. It does not have carrier generation capability and relies on RF as the radio frequency carrier for backscatter communication transmission. Its power consumption is relatively low.

[0074] -Device C: This tag is an active tag with an energy storage capacitor / battery. It relies on non-RF signals for power supply and has carrier generation capability. It consumes the most power.

[0075] Optionally, the backscatter-based communication architecture may include at least the following modes:

[0076] (1) Topology 1: As shown in Figure 1A, the base station in Topology 1 can be used as a radio frequency source, or the transmitting device can also be used as a receiving device. Therefore, Topology 1 is a monostatic backscatter communication system (MBCS) architecture. A traditional RFID system is a typical MBCS, which includes an ambient IoT device (such as a tag) and a reader (such as a base station). The tag communicates directly with the reader, and the reader may have a functional module with a frequency division duplexing (FDD) architecture. In Topology 1, the transmitting device of the control signal and the receiving device of the backscatter signal are the same device, while the transmitting device of the RF carrier source can be the same device as the aforementioned device or a separate device.

[0077] (2) Topology 2: As shown in Figure 1B, in Topology 2, an ambient IoT device (e.g., a tag) receives control signaling and carrier signals from an intermediate node. The control signaling can be instructed by a network device (e.g., a gNB) through an intermediate node. The intermediate node can be a user equipment (UE), a repeater, or an integrated access and backhaul node (IAB). The intermediate node can also act as a relay to forward IoT data to the gNB.

[0078] (3) Topology 3: Topology 3 involves a bistatic backscatter communication system (BBCS), in which the RF source, BSC transmitting device, and BSC receiving device are separate. In Topology 3, the ambient IoT device (such as a tag) sends IoT data / uplink signaling to the base station and receives data / signaling from the auxiliary node, as shown in Figure 1C. Alternatively, the ambient IoT device (such as a tag) sends IoT data / uplink signaling to the auxiliary node and receives data / signaling from the base station, as shown in Figure 1D. The base station communicates with the auxiliary node through the Uu port, and the auxiliary node can be a UE, repeater, IAB, etc.

[0079] (4) Topology 4: As shown in Figure 1E, in Topology 4, the UE acts as a reader to communicate with the tag. This architecture also belongs to the monostatic backscatter communication architecture, but the difference is that the reader is the UE, not the base station.

[0080] Optionally, the modulation technology in backscatter communication includes but is not limited to double sideband modulation (DSB), envelope modulation or amplitude modulation (AM), single sideband (SSB) modulation, etc.

[0081] For SSB modulation, a filtering method or a phase shift method can be used to generate a single sideband signal. The filtering method can be to use a sideband filter to filter unwanted sidebands, while retaining the upper sideband or lower sideband that you want to transmit. In addition, in a possible implementation scheme, the backscatter communication device can achieve single sideband modulation by controlling the reflection coefficient of the load impedance. Since the upper and lower sidebands of the passband signal after double-sideband modulation contain useful modulation signals, only the upper sideband or the lower sideband needs to be used to recover the useful modulation signal. Single sideband SSB modulation is modulated through one of the sidebands to obtain higher bandwidth and power efficiency. Similar to the SSB modulation based on the phase shift method in active communication, the single sideband modulation signal x in backscatter communication ssb (t) can be regarded as a special implementation of Quadrature Amplitude Modulation (QAM), which can be expressed as:

[0082] Where x(t) represents the modulated baseband signal (or called: baseband modulation signal), is the Hilbert transform of x(t), f c represents the carrier frequency of the signal, The Hilbert transform can be viewed as a linear filter, which shifts the incident signal by -90° in the positive frequency band and 90° in the negative frequency band, which can be viewed as a delay of the signal within a quarter of a cycle.

[0083] For backscatter modulation, the backscatter modulation signal is a function of the incident RF carrier signal and the reflection coefficient, which can be expressed as:

[0084] Among them, s(t) is the control signal of the load impedance, that is, the baseband signal to be modulated, which is generally a square wave signal. is the Hilbert transform of the signal s(t), The signal The instantaneous reflection coefficient during control, cos(2πf CW t) represents the radio frequency carrier signal.

[0085] From the expression of the backscattered modulated signal, it can be seen that it is the same as the single-sideband modulated signal x ssb (t) is very similar, only the instantaneous reflection coefficient needs to be effectively controlled A single-sideband backscatter modulation (SSB-BSM) signal can be generated, and the real and imaginary parts of the complex domain reflection coefficient are respectively controlled by the control signal s(t) and control.

[0086] According to Fourier series expansion theory, sine and cosine signals can be constructed from multiple square wave signals. Therefore, in practice, backscatter communication equipment can generate multiple square wave signals to approximate sine or cosine signals, and thus generate the required single-sideband modulation signal, thereby implementing single-sideband backscatter modulation based on square wave approximation.

[0087] Existing single-sideband backscatter modulation requires the backscatter communication device to have carrier generation capabilities, resulting in higher power consumption compared to backscatter communication devices without carrier generation capabilities. An improved single-sideband backscatter modulation approach utilizes square waves to approximate sine / cosine signals. This not only generates single-sideband backscatter modulation signals, but also reduces power consumption by eliminating the need for sine / cosine signal generation. Furthermore, by selecting appropriate parameters, it can effectively eliminate high-order harmonic interference. However, this approach places certain demands on the backscatter communication device. These parameters, such as the square wave level, signal delay, and signal period, must be selected to approximate the sine / cosine signal. Furthermore, switching between different impedances at a fixed frequency is required to effectively generate the single-sideband backscatter modulation signal. Consequently, network configuration or instructions are required to ensure that the resulting single-sideband backscatter modulation signal is the desired modulation signal. Therefore, it is necessary to define parameter configuration methods and signaling procedures for single-sideband backscatter modulation in backscatter communication systems with different topologies, so that network devices or reader devices can effectively demodulate the single-sideband backscatter modulation signal transmitted by the backscatter communication device.

[0088] Optionally, the solution in the present application can be applied to LTE systems, 5G NR systems and NR evolution systems, such as 6G systems and 6G evolution systems, as well as IEEE 802.11 systems (such as Wireless Fidelity (WiFi) systems), Bluetooth systems, Long Range (LoRa) systems, Zigbee systems, backscatter communication systems, low-power Internet of Things systems, Ambient IoT and other communication systems.

[0089] The signal transmission method, information configuration method, apparatus, and communication device provided in the embodiments of the present application are described in detail below with reference to some embodiments and their application scenarios in conjunction with the accompanying drawings.

[0090] Please refer to Figure 2, which is a flowchart of a signal transmission method provided in an embodiment of the present application. The method is performed by a first device, such as a backscatter communication device. As shown in Figure 2, the method includes the following steps:

[0091] Step 21: The first device generates a first signal based on the first information. The first signal is a baseband modulated signal. The modulation method includes but is not limited to amplitude shift keying (ASK) modulation, binary on-off keying (OOK) modulation, phase shift keying (PSK) modulation, etc. The signal waveform includes but is not limited to a sine signal, a cosine signal, a square wave signal, etc.

[0092] Step 22: The first device generates a second signal based on the first signal and the received radio frequency carrier signal; the radio frequency carrier signal is a single-tone signal, and the second signal is a single-sideband backscatter modulated signal; the bandwidth of the second signal is the same as the bandwidth of the first signal;

[0093] Step 23: The first device sends the second signal.

[0094] In an embodiment of the present application, the first signal is generated by the first device and is controlled by baseband information. The first signal can be any of the following: a square wave signal, a sine signal, a cosine signal, an approximately simulated sine signal, or an approximately simulated cosine signal. The approximately simulated sine signal can be approximately simulated by multiple square wave signals of different levels. The approximately simulated cosine signal can be approximately simulated by multiple square wave signals of different levels. For example, when the first signal is a sine signal or a cosine signal, the first signal can be generated by the first device using a local oscillator or other active device; or, when the first signal is an approximately simulated sine signal or a cosine signal, the first device first generates multiple square wave signals, and then approximately simulates the sine signal or the cosine signal using the multiple square wave signals. The first signal can also be a square wave signal controlled by a baseband signal, used to directly control the switching of the load impedance in the first device, thereby directly generating a single-sideband backscatter modulated signal.

[0095] The radio frequency carrier signal may be any one of the following: a sine signal or a cosine signal.

[0096] Optionally, the first information may be determined by the first device, or may be configured or indicated by other devices.

[0097] For example, the first device may send the second signal (i.e., a single-sideband backscatter modulated signal) to the second device, where the second device is a receiving device of the single-sideband backscatter modulated signal, such as a network device or a reader / writer device. In addition, the first device may also receive the RF carrier signal from the second device, i.e., the second device may also be a RF carrier source device that provides the RF carrier signal.

[0098] For another example, the first device may receive the radio frequency carrier signal from a third device, where the third device is a device that provides the radio frequency carrier signal, such as a radio frequency carrier source device.

[0099] Through the scheme in the embodiment of the present application, a first device can generate a first signal based on the first information, where the first signal is a baseband modulation signal. A second signal can be generated based on the first signal and the received RF carrier signal, and the second signal can be sent. The RF carrier signal is a single-tone signal, and the second signal is a single-sideband backscatter modulation signal, thereby realizing signal transmission based on single-sideband baseband modulation in backscatter communication.

[0100] Optionally, the first information includes but is not limited to at least one of the following:

[0101] (1) parameter information of the first signal; based on this parameter information, the first device can generate a corresponding first signal, that is, obtain a corresponding baseband modulated signal;

[0102] (2) indication information related to parameter information of the first signal; based on this parameter information, the first device can obtain the parameter information of the first signal and then generate a corresponding baseband modulated signal;

[0103] (3) first index information associated with a sine signal or a cosine signal, the first index information being used to indicate parameter information of the associated sine signal or cosine signal; wherein different first index information corresponds to different frequency domain related parameters, time domain related parameters, signal amplitude, signal power, signal level values, etc. of the sine signal / cosine signal; with the aid of the first index information in the first information, the first device can obtain the frequency domain related parameters, time domain related parameters, signal amplitude, signal power, signal level values, etc. of the associated sine signal / cosine signal, thereby generating a corresponding baseband modulated signal;

[0104] (4) second index information associated with the square wave signal, the second index information being used to indicate parameter information of the associated square wave signal; wherein different second index information corresponds to different square wave combination modes, including the number of square waves and frequency domain-related parameters, time domain-related parameters, signal amplitude, signal power, signal level values, etc. of different square waves; with the aid of the second index information in the first information, the first device can obtain the associated square wave signal combination mode, thereby generating a corresponding baseband modulation signal;

[0105] (5) third index information associated with the reflection coefficient, the third index information being used to indicate relevant information of the associated reflection coefficient; wherein different third index information corresponds to different combinations of reflection coefficients, including types and sizes of reflection coefficients / impedance values, reflection coefficient / impedance values, and permutations and combinations of reflection coefficients; with the aid of the third index information in the first information, the first device can generate a corresponding square wave signal and control the switching of the corresponding load impedance to generate a corresponding single-sideband backscatter modulated signal;

[0106] (6) fourth index information related to single-sideband baseband modulation (corresponding to the baseband modulation described above), the fourth index information being used to indicate modulation parameters of the single-sideband baseband modulation configured by the network, predefined, or agreed upon by the protocol, such as modulation rate, bandwidth, frequency, etc.; thus, a corresponding baseband modulation signal can be generated based on the modulation parameters of the single-sideband baseband modulation indicated by the fourth index information;

[0107] (7) Trigger information related to single-sideband baseband modulation, which indicates predefined or protocol-agreed fixed single-sideband baseband modulation parameters, such as modulation rate, bandwidth, and frequency. Thus, a corresponding baseband modulation signal can be generated based on the single-sideband baseband modulation parameters indicated by this trigger information.

[0108] It is understandable that (1) and (2) above are information explicitly indicating the generation of baseband modulation signals. (3) to (7) above are information implicitly indicating the generation of baseband modulation signals. Thus, the single-sideband backscatter modulation parameters of the backscatter device can be configured / indicated by explicit or implicit methods, so that backscatter devices with different capabilities can generate single-sideband backscatter modulation signals to meet different communication performance (communication rate, communication distance, etc.) and power consumption requirements.

[0109] Optionally, the parameter information of the first signal includes but is not limited to at least one of the following:

[0110] The waveform type of the first signal, such as a sine wave, a cosine wave, a square wave, etc.;

[0111] the frequency of the first signal;

[0112] a modulation rate of the first signal;

[0113] a modulation bandwidth of the first signal;

[0114] a backscatter link frequency (BLF) of the first signal;

[0115] When the first signal is a sine signal or a cosine signal approximately simulated by a square wave signal, at least one of the following items of the square wave signal: one or more signal lengths, one or more signal delays, one or more signal amplitudes, one or more signal powers, and one or more signal level values; based on the relevant information of the square wave signal, the corresponding sine signal or cosine signal can be approximately simulated;

[0116] the number of types of reflection coefficients associated with the first signal;

[0117] The value of the reflection coefficient related to the first signal; at this time, the backscatter communication device can be directly and explicitly instructed to switch based on the corresponding reflection coefficient, thereby generating a corresponding baseband modulated signal.

[0118] In an embodiment of the present application, the first device may be configured or instructed to generate relevant information for the second signal. The first information may include frequency or bandwidth related information of the second signal; the generation of the second signal includes:

[0119] The first device generates the second signal based on frequency or bandwidth related information of the second signal, where the frequency or bandwidth related information of the second signal includes at least one of the following:

[0120] a signal bandwidth of the second signal;

[0121] a center frequency of the second signal;

[0122] the lowest frequency point and signal bandwidth of the second signal;

[0123] The highest frequency point and signal bandwidth of the second signal;

[0124] the lowest frequency point and the highest frequency point of the second signal;

[0125] an indication of the signal bandwidth and upper and lower sidebands of the second signal;

[0126] The frequency shift related information of the second signal.

[0127] In an embodiment of the present application, the first device may be configured or instructed to send relevant information for the second signal. The first information may include signal transmission parameters of the second signal; and the sending of the second signal includes:

[0128] The first device sends the second signal based on a signal transmission parameter of the second signal. The signal transmission parameter of the second signal includes but is not limited to at least one of the following:

[0129] a modulation method of the second signal;

[0130] a modulation order or modulation level of the second signal;

[0131] a modulation rate or link frequency of the second signal;

[0132] Time domain resources of the second signal, such as signal period, signal length, etc.;

[0133] signal power of the second signal;

[0134] a coding method of the second signal, such as line coding, channel coding, etc.;

[0135] an encoding bit rate of the second signal;

[0136] a signal waveform of the second signal;

[0137] The number of repeated transmissions of the second signal.

[0138] Optionally, the first information includes a signal transmission parameter of the radio frequency carrier signal; and the signal transmission method may further include:

[0139] The first device receives the radio frequency carrier signal based on a signal transmission parameter of the radio frequency carrier signal; the signal transmission parameter of the radio frequency carrier signal includes but is not limited to at least one of the following:

[0140] The signal waveform of the radio frequency carrier signal;

[0141] Time domain resource information of the radio frequency carrier signal, such as but not limited to signal length, signal period, time interval between periodic signals, time window, etc.;

[0142] The frequency domain resource information of the radio frequency carrier signal includes, but is not limited to, signal bandwidth, center frequency, etc.

[0143] In the embodiment of the present application, the first device may obtain the first information in a variety of ways. The signal transmission method may also include:

[0144] 1) The first device determines the first information, that is, the first device itself has the ability to determine the configuration information;

[0145] 2) The first device receives the first information from the second device, where the second device is a receiving device of the single-sideband backscatter modulated signal. That is, in this case, the second device is both a receiving device for receiving the second signal and a device for configuring or indicating the first information, and may be an access network device such as a base station, a terminal device such as a UE, a relay device, a repeater device, an IAB device, a wireless access point (AP), etc.

[0146] 3) The first device receives the first information from a third device, where the third device is a device that provides the radio frequency carrier signal. That is, in this case, the third device not only provides the radio frequency carrier signal to the first device, but also configures or indicates the first information. The third device may be an access network device such as a base station, a terminal device such as a UE, a relay device, a repeater device, an IAB device, an AP device, a dedicated radio frequency source device, or the like.

[0147] 4) The first device receives the first information from the fourth device, where the fourth device is a device with a network scheduling function; the fourth device is a device different from the first device, the second device, and the third device, and has a network scheduling function, such as a gateway, a router, an access network device, a relay device, an IAB device, a Repeater device, a terminal device, an AP device, etc.

[0148] It should be noted that, in addition to the above-mentioned method of determining or configuring / indicating the first information, the first information can also be configured / indicated by at least two of the first to fourth devices: (I) Multiple devices respectively configure part of the first information and form the complete first information; for example, the second device configures the signal parameter information of the radio frequency carrier signal for the first device, and the second device that receives and demodulates the second signal configures the parameter information of the first signal and the parameter information of the backscatter modulation signal for the first device. (II) One device configures multiple groups of first information through high-layer signaling, and another device activates one group of first information among the multiple groups of first information through physical layer or media access control (MAC) layer signaling. For example, the fourth device configures multiple groups of first information for the first device, and the second device activates one group of first information among them through downlink control information (DCI), sidelink control information (SCI) or layer 1 (L1) signaling.

[0149] Optionally, the first information may be determined according to at least one of the following:

[0150] a) capability information of the first device; this capability information includes at least information related to the first device's ability to generate baseband modulated signals, such as supported frequency shift capability, supported capabilities related to generating sine / cosine carrier signals, supported capabilities related to generating square wave signals, single-sideband backscatter modulation type, modulation mode, coding capability, antenna impedance magnitude, operating frequency band, operating bandwidth, preamble-related capabilities, antenna capabilities, etc.;

[0151] b) capability information of the second device; this capability information includes at least information related to the receiver architecture, operating bandwidth, operating frequency, demodulation mode, decoding capability, etc. of the second device;

[0152] c) capability information of the third device; this capability information includes at least capability information related to generating radio frequency carrier signals, such as supported radio frequency carrier frequencies, bandwidths, signal types, etc.;

[0153] d) channel state information, signal quality information, or communication statistics between the first device and the second device; for example, the signal quality information includes but is not limited to Reference Signal Received Power (RSRP), Received Signal Strength Indication (RSSI), Signal-to-Noise Ratio (SNR), Signal to Interference plus Noise Ratio (SINR), Signal to Interference Ratio (SIR), etc.; the communication statistics information includes but is not limited to the number of consecutive successful acknowledgments (ACK), the number of negative acknowledgments (NACK), and the block error rate (BLER);

[0154] e) device status information of the first device; for example, the device status information includes at least the current power level of the first device, an overheating warning, etc.;

[0155] f) device status information of the second device; for example, the device status information includes at least the current power level of the second device, overheating warning, etc.;

[0156] g) request information of the first device; for example, the request information may be generated by the first device according to its own status or service requirements, such as a buffer status report (BSR) or a scheduling request indicator (SRI);

[0157] h) Data type information or service quality of service (QoS) information, such as data type information or service QoS information from the application layer or protocol upper layer.

[0158] Optionally, when the first information is received by the first device, that is, the first information is configured or indicated, the first information may be configured or indicated by at least one of the following:

[0159] Radio Resource Control (RRC) signaling; this method requires the first device to have an RRC protocol layer;

[0160] Non-Access Stratum (NAS) signaling; this method requires the first device to have the NSA protocol layer;

[0161] Medium Access Control Control Element (MAC CE); i.e., using MAC CE signaling to configure signal parameters of the first device. This situation is also applicable to the first device that does not support RRC signaling or has weak NAS signaling capabilities;

[0162] Downlink Control Information (DCI); this DCI is physical layer signaling, that is, dynamically indicating the first information through physical layer signaling;

[0163] Sidelink Control Information (SCI); the SCI is physical layer signaling, that is, dynamically indicating the first information through physical layer signaling;

[0164] Layer 1 signaling, such as the physical frame header and preamble that carry control information, can be placed in the same physical frame as the effective data payload, or it can be placed in a separate physical frame;

[0165] Factory configuration information or default configuration information; for example, when the first device accesses the network for the first time or does not support RRC configuration information, the system configures signal parameters related to the first signal.

[0166] In one embodiment, the first information can be configured or indicated by combining high-layer signaling with physical layer signaling; for example, the fourth device first configures a set of first information for the first device through high-layer signaling such as RRC, and then activates or indicates one of the first information through DCI, SCI or other L1 signaling.

[0167] In another embodiment, the first information can be configured or indicated through a three-layer signaling structure; for example, multiple groups of first information are first configured for the first device through high-level signaling such as RRC, and then one group of first information is selected through MAC signaling, and then one of the first information is activated or indicated through DCI, SCI or other L1 signaling.

[0168] In another embodiment, the above-mentioned first information can be configured simultaneously, and the final signal parameters related to the first signal / second signal are determined based on the priority. For example, the first device supports both RRC configuration and dynamic configuration based on DCI. After entering the network, the first device always uses the single-sideband modulation and signal parameters related to the first signal / second signal configured by RRC, and only changes its corresponding modulation and signal parameters related to the first signal after receiving DCI or L1 signaling that changes the parameters of the first signal.

[0169] In another embodiment, the first information may be placed together with the radio frequency carrier signal as part of a physical layer frame. In this case, the first information and the radio frequency carrier signal are no longer distinguished between the control plane and the user plane.

[0170] Please refer to Figure 3, which is a flowchart of a signal transmission method provided in an embodiment of the present application. The method is performed by a second device, such as an access network device such as a base station, a terminal device such as a UE, a relay device, a repeater device, an IAB device, an AP device, etc. As shown in Figure 3, the method includes the following steps:

[0171] Step 31: The second device performs a first operation according to the second information; the first operation at least includes: receiving a second signal sent by the first device and demodulating the second signal.

[0172] In this embodiment of the present application, the second signal is a single-sideband backscatter modulated signal, generated based on the first signal and a radio frequency carrier signal. The first signal is a baseband modulated signal, the bandwidth of the first signal is the same as the bandwidth of the second signal, and the radio frequency carrier signal is a single-tone signal. In addition, the second device also performs signal processing such as synchronization, channel estimation, channel equalization, and filtering.

[0173] Optionally, the baseband modulation signal can be any of the following: a square wave signal, a sine signal, a cosine signal, an approximately simulated sine signal, or an approximately simulated cosine signal; this baseband modulation signal is controlled by baseband information. The approximately simulated sine signal can be approximately simulated by multiple square wave signals of different levels. The approximately simulated cosine signal can be approximately simulated by multiple square wave signals of different levels. For example, when the first signal is a sine signal or a cosine signal, the first signal can be generated by the first device through a local oscillator or other active device; or, when the first signal is an approximately simulated sine signal or a cosine signal, the first device first generates multiple square wave signals, and then approximately simulates the sine signal or the cosine signal using the multiple square wave signals. The first signal can also be a square wave signal controlled by a baseband signal, used to directly control the switching of the load impedance in the first device, thereby directly generating a single-sideband backscatter modulation signal.

[0174] Optionally, the radio frequency carrier signal may be any one of the following: a sine signal, a cosine signal.

[0175] Optionally, the second information may be determined by the second device, or may be configured or indicated by other devices.

[0176] Through the solution in the embodiment of the present application, the second device can receive the second signal sent by the first device and demodulate the second signal according to the second information. The second signal is a single-sideband backscatter modulated signal. The second signal is generated based on the baseband modulation signal and the radio frequency carrier signal. The radio frequency carrier signal is a single-tone signal, thereby realizing signal transmission based on single-sideband baseband modulation in backscatter communication.

[0177] Optionally, the second information includes but is not limited to at least one of the following:

[0178] signal transmission parameters of the second signal,

[0179] The frequency or bandwidth related information of the second signal.

[0180] Optionally, the signal transmission parameter of the second signal includes at least one of the following:

[0181] a modulation method of the second signal;

[0182] a modulation order or modulation level of the second signal;

[0183] a modulation rate or link frequency of the second signal;

[0184] Time domain resources of the second signal, such as signal period, signal length, etc.;

[0185] signal power of the second signal;

[0186] a coding method of the second signal, such as line coding, channel coding, etc.;

[0187] an encoding bit rate of the second signal;

[0188] a signal waveform of the second signal;

[0189] The number of repeated transmissions of the second signal.

[0190] Optionally, the frequency or bandwidth related information of the second signal includes but is not limited to at least one of the following:

[0191] a signal bandwidth of the second signal;

[0192] a center frequency of the second signal;

[0193] the lowest frequency point and signal bandwidth of the second signal;

[0194] The highest frequency point and signal bandwidth of the second signal;

[0195] the lowest frequency point and the highest frequency point of the second signal;

[0196] an indication of the signal bandwidth and upper and lower sidebands of the second signal;

[0197] The frequency shift related information of the second signal.

[0198] In the embodiment of the present application, the second device may obtain the second information in a variety of ways. The signal transmission method may also include:

[0199] I) The second device determines the second information, that is, the second device itself has the ability to determine the configuration information;

[0200] II) The second device receives the second information from the first device, where the first device is a device that sends the single-sideband backscatter modulated signal. That is, at this time, the first device is both a device that sends the single-sideband backscatter modulated signal and a device that configures or indicates the second information.

[0201] III) The second device receives the second information from a third device, where the third device is the device that provides the radio frequency carrier signal. That is, in this case, the third device is both the device that provides the radio frequency carrier signal and the device that configures or indicates the second information.

[0202] IV) The second device receives the second information from a fourth device, where the fourth device is a device having a network scheduling function. The fourth device is a device different from the first, second, and third devices and having a network scheduling function, such as a gateway, a router, an access network device, a relay device, an IAB device, a repeater device, an AP device, or a terminal device.

[0203] It should be noted that, in addition to the above-mentioned method of determining or configuring / indicating the second information, the second information can also be configured / indicated by at least two of the first device to the fourth device: (I) multiple devices respectively configure part of the second information and form the complete second information; for example, the first device configures the signal transmission parameters of the single-sideband backscatter modulated signal for the second device, and the third device configures the frequency or bandwidth-related information of the single-sideband backscatter modulated signal for the second device; (II) one device configures multiple groups of second information through high-layer signaling, and the other device activates one group of second information among the multiple groups of second information through physical layer or media access control MAC layer signaling.

[0204] Optionally, the second information may be determined according to at least one of the following:

[0205] a) capability information of the first device; this capability information includes at least information related to the first device's ability to generate baseband modulated signals, such as supported frequency shift capability, supported capabilities related to generating sine / cosine carrier signals, supported capabilities related to generating square wave signals, single-sideband backscatter modulation type, modulation mode, coding capability, antenna impedance magnitude, operating frequency band, operating bandwidth, preamble-related capabilities, antenna capabilities, etc.;

[0206] b) capability information of the second device; this capability information includes at least information related to the receiver architecture, operating bandwidth, operating frequency, demodulation mode, decoding capability, etc. of the second device;

[0207] c) capability information of the third device; this capability information includes at least capability information related to generating radio frequency carrier signals, such as supported radio frequency carrier frequencies, bandwidths, signal types, etc.;

[0208] d) channel state information, signal quality information, or communication statistics between the first device and the second device; for example, the signal quality information includes but is not limited to RSRP, RSSI, SNR, SINR, SIR, etc.; the communication statistics include but is not limited to the number of consecutive successful ACKs, the number of NACKs, the block error rate (BLER), etc.;

[0209] e) device status information of the first device; for example, the device status information includes at least the current power level of the first device, an overheating warning, etc.;

[0210] f) device status information of the second device; for example, the device status information includes at least the current power level of the second device, overheating warning, etc.;

[0211] g) request information of the first device; for example, request information generated by the first device according to its own status or service requirements, such as a buffer status report BSR or a scheduling request indication SRI;

[0212] h) Data type information or service quality information, such as data type information or service QoS information from the application layer or higher protocol layers.

[0213] Optionally, the second information may be configured or indicated by at least one of the following:

[0214] RRC signaling, this method requires the second device to have the RRC protocol layer;

[0215] NAS signaling, this method requires the second device to have the NSA protocol layer;

[0216] MAC CE, i.e., using MAC CE signaling to configure the signal parameters of the second device. This situation is also applicable to the second device that does not support RRC signaling or has weak NAS signaling capabilities;

[0217] DCI, where the DCI is physical layer signaling, i.e., dynamically indicating the second information through physical layer signaling;

[0218] SCI, where the SCI is physical layer signaling, i.e., dynamically indicating the second information through physical layer signaling;

[0219] Layer 1 signaling, such as the physical frame header and preamble that carry control information, can be placed in the same physical frame as the effective data payload, or it can be placed in a separate physical frame;

[0220] Factory configuration information or default configuration information, for example, when the second device accesses the network for the first time or does not support RRC configuration information, the system configures signal parameters related to the second signal.

[0221] In one embodiment, the second information can be configured or indicated by combining high-layer signaling with physical layer signaling; for example, the fourth device first configures a set of second information for the second device through high-layer signaling such as RRC, and then activates one of the second information through DCI, SCI or other L1 signaling.

[0222] In another embodiment, the second information can be configured or indicated through a three-layer signaling structure; for example, multiple groups of second information are first configured for the second device through high-level signaling such as RRC, and then one group of the second information is selected through MAC signaling, and then one of the second information is activated through DCI, SCI or other L1 signaling.

[0223] In another embodiment, the second information can be configured simultaneously, and the final signal parameters associated with the second signal are determined based on priority. For example, the second device supports both RRC configuration and dynamic configuration based on DCI. After entering the network, the second device continues to use the single-sideband modulation and signal parameters associated with the second signal configured by RRC until it receives DCI or L1 signaling that changes the parameters of the second signal, at which point it changes the corresponding demodulation and signal parameters associated with the second signal.

[0224] In another embodiment, the second information is placed together with the single sideband backscatter modulated signal as part of the physical layer frame. In this case, the second information and the single sideband backscatter modulated signal are no longer distinguished between the control plane and the user plane.

[0225] Please refer to FIG. 4 , which is a flowchart of an information configuration method provided in an embodiment of the present application. The method is performed by the fifth device. As shown in FIG. 4 , the method includes the following steps:

[0226] Step 41: The fifth device performs a second operation; the second operation includes at least one of the following: sending first information to the first device, sending second information or third information to the second device, and sending third information to the third device.

[0227] In an embodiment of the present application, the first information is used to generate a baseband modulation signal, generate a second signal, or send a second signal; the second information is used to receive or demodulate the second signal, and the third information is used to generate or transmit a radio frequency carrier signal; the second signal is a single-sideband backscatter modulation signal, and the second signal is generated based on the first signal and the radio frequency carrier signal. The first signal is a baseband modulation signal, the bandwidth of the first signal is the same as the bandwidth of the second signal, and the radio frequency carrier signal is a single-tone signal.

[0228] Optionally, the baseband modulation signal can be any of the following: a square wave signal, a sine signal, a cosine signal, an approximately simulated sine signal, or an approximately simulated cosine signal; this baseband modulation signal is controlled by baseband information. The approximately simulated sine signal can be obtained by approximately simulating multiple square wave signals of different levels. The approximately simulated cosine signal can be obtained by approximately simulating multiple square wave signals of different levels. For example, when the first signal is a sine signal or a cosine signal, the first signal can be generated by the first device through a local oscillator or other active device; or, when the first signal is an approximately simulated sine signal or a cosine signal, the first device first generates multiple square wave signals, and then approximately simulates the sine signal or the cosine signal using the multiple square wave signals. The first signal can also be a square wave signal controlled by a baseband signal, used to directly control the switching of the load impedance in the first device, thereby directly generating a single-sideband backscatter modulation signal.

[0229] Optionally, the radio frequency carrier signal may be any one of the following: a sine signal, a cosine signal.

[0230] Optionally, the fifth device may be any one of the following:

[0231] The first device is a device for transmitting single-sideband backscatter modulated signals, such as a backscatter communication device;

[0232] The second device is a receiving device for single-sideband backscatter modulated signals, such as access network devices such as base stations, terminal devices such as UEs, relay devices, repeater devices, IAB devices, AP devices, etc.

[0233] The third device is a device for transmitting radio frequency carrier signals;

[0234] A fourth device having a network scheduling function; the fourth device is a device having a network scheduling function that is different from the first device, the second device, and the third device, such as a gateway, a router, an access network device, a relay device, an IAB device, a Repeater device, a terminal device, an AP device, etc.

[0235] Therefore, with the help of reasonable configuration or instruction, backscatter devices with different capabilities can generate single-sideband backscatter modulated signals, thereby realizing signal transmission based on single-sideband baseband modulation in backscatter communication, meeting different communication performance (communication rate, communication distance, etc.) and power consumption requirements.

[0236] Optionally, the first information includes at least one of the following:

[0237] - parameter information of the first signal; based on this parameter information, the first device can generate a corresponding first signal, that is, obtain a corresponding baseband modulated signal;

[0238] - indication information related to parameter information of the first signal; based on this parameter information, the first device can obtain the parameter information of the first signal and then generate a corresponding baseband modulated signal;

[0239] - first index information associated with a sine signal or a cosine signal, the first index information being used to indicate parameter information of the associated sine signal or cosine signal; wherein different first index information corresponds to different frequency domain-related parameters, time domain-related parameters, signal amplitude, signal power, signal level values, etc. of the sine signal / cosine signal; with the aid of the first index information in the first information, the first device can obtain the frequency domain-related parameters, time domain-related parameters, signal amplitude, signal power, signal level values, etc. of the associated sine signal / cosine signal, thereby generating a corresponding baseband modulated signal;

[0240] - second index information associated with the square wave signal, the second index information being used to indicate parameter information of the associated square wave signal; wherein different second index information corresponds to different square wave combinations, including the number of square waves and frequency-domain-related parameters, time-domain-related parameters, signal amplitude, signal power, signal level values, etc. of different square waves; with the aid of the second index information in the first information, the first device can obtain the associated square wave signal combination, thereby generating a corresponding baseband modulation signal;

[0241] - third index information associated with the reflection coefficient, the third index information being used to indicate relevant information of the associated reflection coefficient; wherein different third index information corresponds to different reflection coefficient combinations, including types and sizes of reflection coefficient / impedance values, reflection coefficient / impedance values, and permutations and combinations of reflection coefficients; with the aid of the third index information in the first information, the first device can generate a corresponding square wave signal and control the switching of the corresponding load impedance to generate a corresponding single-sideband backscatter modulated signal;

[0242] - fourth index information related to single-sideband baseband modulation (corresponding to the baseband modulation described above), the fourth index information being used to indicate modulation parameters of the single-sideband baseband modulation configured by the network, predefined, or agreed upon by the protocol, such as modulation rate, bandwidth, frequency, etc.; thus, a corresponding baseband modulated signal can be generated based on the modulation parameters of the single-sideband baseband modulation indicated by the fourth index information;

[0243] - Trigger information related to single-sideband baseband modulation, where the trigger information indicates predefined or protocol-agreed fixed single-sideband baseband modulation parameters, such as modulation rate, bandwidth, and frequency; thus, a corresponding baseband modulation signal can be generated based on the single-sideband baseband modulation parameters indicated by the trigger information;

[0244] - information related to the frequency or bandwidth of the second signal, used to generate the second signal;

[0245] - a signal transmission parameter of the second signal, used for transmitting the second signal;

[0246] -Signal transmission parameters of the radio frequency carrier signal, used for transmitting the radio frequency carrier signal.

[0247] Optionally, the parameter information of the first signal includes but is not limited to at least one of the following:

[0248] a waveform type of the first signal;

[0249] the frequency of the first signal;

[0250] a modulation rate of the first signal;

[0251] a modulation bandwidth of the first signal;

[0252] a backscatter link frequency of the first signal;

[0253] When the first signal is a sine signal or a cosine signal approximately simulated by a square wave signal, at least one of the following items of the square wave signal: one or more signal lengths, one or more signal delays, one or more signal amplitudes, one or more signal powers, and one or more signal level values; based on the relevant information of the square wave signal, the corresponding sine signal or cosine signal can be approximately simulated;

[0254] the number of types of reflection coefficients associated with the first signal;

[0255] The value of the reflection coefficient related to the first signal; at this time, the backscatter communication device can be directly and explicitly instructed to switch based on the corresponding reflection coefficient, thereby generating a corresponding baseband modulated signal.

[0256] Optionally, the frequency or bandwidth related information of the second signal includes at least one of the following:

[0257] a signal bandwidth of the second signal;

[0258] a center frequency of the second signal;

[0259] the lowest frequency point and signal bandwidth of the second signal;

[0260] The highest frequency point and signal bandwidth of the second signal;

[0261] the lowest frequency point and the highest frequency point of the second signal;

[0262] an indication of the signal bandwidth and upper and lower sidebands of the second signal;

[0263] The frequency shift related information of the second signal.

[0264] Optionally, the signal transmission parameter of the second signal includes at least one of the following:

[0265] a modulation method of the second signal;

[0266] a modulation order or modulation level of the second signal;

[0267] a modulation rate or link frequency of the second signal;

[0268] Time domain resources of the second signal, such as signal period, signal length, etc.;

[0269] signal power of the second signal;

[0270] a coding method of the second signal, such as line coding, channel coding, etc.;

[0271] an encoding bit rate of the second signal;

[0272] a signal waveform of the second signal;

[0273] The number of repeated transmissions of the second signal.

[0274] Optionally, the signal transmission parameter of the radio frequency carrier signal includes at least one of the following:

[0275] The signal waveform of the radio frequency carrier signal;

[0276] signal power of the radio frequency carrier signal;

[0277] Time domain resource information of the radio frequency carrier signal, such as but not limited to signal length, signal period, time interval between periodic signals, time window, etc.;

[0278] The frequency domain resource information of the radio frequency carrier signal includes, but is not limited to, signal bandwidth, center frequency, etc.

[0279] Optionally, the second information includes at least one of the following:

[0280] signal transmission parameters of the second signal;

[0281] The frequency or bandwidth related information of the second signal.

[0282] Optionally, the signal transmission parameter of the second signal includes at least one of the following:

[0283] a modulation method of the second signal;

[0284] a modulation order or modulation level of the second signal;

[0285] a modulation rate or link frequency of the second signal;

[0286] Time domain resources of the second signal, such as signal period, signal length, etc.;

[0287] signal power of the second signal;

[0288] a coding method of the second signal, such as line coding, channel coding, etc.;

[0289] an encoding bit rate of the second signal;

[0290] a signal waveform of the second signal;

[0291] The number of repeated transmissions of the second signal.

[0292] Optionally, the frequency or bandwidth related information of the second signal includes at least one of the following:

[0293] a signal bandwidth of the second signal;

[0294] a center frequency of the second signal;

[0295] the lowest frequency point and signal bandwidth of the second signal;

[0296] The highest frequency point and signal bandwidth of the second signal;

[0297] the lowest frequency point and the highest frequency point of the second signal;

[0298] an indication of the signal bandwidth and upper and lower sidebands of the second signal;

[0299] The frequency shift related information of the second signal.

[0300] Optionally, the first information / second information may be determined according to at least one of the following:

[0301] a) capability information of the first device; this capability information includes at least information related to the first device's ability to generate baseband modulated signals, such as supported frequency shift capability, supported capabilities related to generating sine / cosine carrier signals, supported capabilities related to generating square wave signals, single-sideband backscatter modulation type, modulation mode, coding capability, antenna impedance magnitude, operating frequency band, operating bandwidth, preamble-related capabilities, antenna capabilities, etc.;

[0302] b) capability information of the second device; this capability information includes at least information related to the receiver architecture, operating bandwidth, operating frequency, demodulation mode, decoding capability, etc. of the second device;

[0303] c) capability information of the third device; this capability information includes at least capability information related to generating radio frequency carrier signals, such as supported radio frequency carrier frequencies, bandwidths, signal types, etc.;

[0304] d) channel state information, signal quality information, or communication statistics between the first device and the second device; for example, the signal quality information includes but is not limited to RSRP, RSSI, SNR, SINR, SIR, etc.; the communication statistics include but is not limited to the number of consecutive successful ACKs, the number of NACKs, the block error rate (BLER), etc.;

[0305] e) device status information of the first device; for example, the device status information includes at least the current power level of the first device, an overheating warning, etc.;

[0306] f) device status information of the second device; for example, the device status information includes at least the current power level of the second device, overheating warning, etc.;

[0307] g) request information of the first device; for example, request information generated by the first device according to its own status or service requirements, such as a buffer status report BSR or a scheduling request indication SRI;

[0308] h) Data type information or service quality information, such as data type information or service QoS information from the application layer or higher protocol layers.

[0309] Optionally, the third information includes at least one of the following:

[0310] The signal waveform of the radio frequency carrier signal;

[0311] signal power or signal amplitude of the radio frequency carrier signal;

[0312] Time domain resource information of the radio frequency carrier signal, such as but not limited to signal length, signal period, time interval between periodic signals, time window, etc.;

[0313] Frequency domain resource information of the radio frequency carrier signal, such as but not limited to signal bandwidth, center frequency, etc.;

[0314] The preamble or synchronization sequence of the radio frequency carrier signal.

[0315] Optionally, the performing of the second operation includes:

[0316] The fifth device performs the second operation by at least one of the following:

[0317] Radio resource control signaling;

[0318] Non-access stratum NAS signaling;

[0319] Media Access Control Element MAC CE;

[0320] Downlink control information DCI;

[0321] Secondary link control information SCI;

[0322] Layer 1 signaling, such as a physical frame header and preamble that carry control information, can be placed in the same physical frame as the effective data payload, or it can be placed in a separate physical frame.

[0323] The present application is described below with reference to specific embodiments.

[0324] Example 1

[0325] In this first embodiment, the first device controls the instantaneous reflection coefficient to implement a single-sideband backscatter modulated signal. The first device can generate a desired first signal (e.g., a square wave signal) based on the first information. The first signal is then used as an input signal for controlling the instantaneous reflection coefficient of the device and multiplied by the received RF carrier signal to obtain a single-sideband backscatter modulated signal (i.e., a second signal).

[0326] As shown in FIG5 , the first device (such as a backscatter communication device) generates a frequency f according to the instruction of the first information. B The first signal (such as a square wave signal) is recorded as s(t). Then it is the Hilbert transform of the first signal s(t). From the expression of the backscattered modulated signal, it can be seen that it is very similar to the single-sideband modulated signal. It only needs to effectively design the instantaneous reflection coefficient A single-sideband backscatter modulated signal can be generated, and the real and imaginary parts of the complex domain reflection coefficient are respectively controlled by the control signal (baseband signal to be modulated) s(t) and In one possible implementation, assuming that the first device supports four complex reflection coefficients, the instantaneous reflection coefficient and the control signal s(t) The mapping relationship is:

[0327] Among them, |Γ0|=|Γ1|=|Γ2|=|Γ3|, and the phases corresponding to the four reflection coefficients are evenly spaced on the Smith original image.

[0328] According to the instruction of the first information, the first signal and the reflection coefficient determined by the Hilbert transform thereof are combined with the received radio frequency carrier signal f RF =cos(2πf C t) is multiplied to generate a single-sideband backscatter modulated signal Assume that the reflection coefficient is written as the sum of the real part and the imaginary number, that is, Ae jφ =Γ I +jΓ Q , then the single-sideband backscatter modulated signal It can be expressed as:

[0329] Thus, a single-sideband backscattered modulated signal can be obtained.

[0330] Taking 8 complex reflection coefficients as an example, according to the instruction of the first information, the first device generates a frequency f in the digital domain B The square wave signal (i.e., control signal) is switched among 8 different impedances. 8 different impedances are selected by the control signal: [0.9239+j0.3827,0.3827+j0.9239,-0.3827+j0.9239,-0.9239+ j0.3827,0.9239-j0.3827,0.3827-j0.9239,-0.3827-j0.9239,-0.9239-j0.3827],

[0331] One of the impedances can generate the required baseband modulation signal B is the baseband signal and is combined with the incident RF carrier signal cos(2πf c t) are multiplied together to finally generate a single-sideband backscatter modulated signal.

[0332] In this case, the first information includes at least the following:

[0333] (1) The waveform type of the first signal, which is a square wave in this embodiment 1, and the square wave signal is controlled by the baseband signal;

[0334] (2) Modulation rate, modulation bandwidth, frequency, signal period, etc. of the first signal;

[0335] (3) Alternatively, index information associated with the square wave signal, where different index information corresponds to square wave signals of different frequencies, periods, and amplitudes;

[0336] (4) Alternatively, index information associated with the reflection coefficient, different index information corresponds to different combinations of reflection coefficients, and the combinations of reflection coefficients specifically include: the number of types of reflection coefficients, reflection coefficient values ​​or impedance sizes, and permutations and combinations of reflection coefficients.

[0337] Example 2

[0338] In this second embodiment, the first device actively generates a sine / cosine signal, thereby generating a single-sideband backscatter modulated signal. The first device can generate the required first signal (e.g., a sine / cosine signal) based on the first information, and multiply it with the received RF carrier signal to generate a single-sideband backscatter modulated signal (i.e., the second signal).

[0339] As shown in FIG6 , the first device (ie, the backscatter communication device) generates a frequency f according to the instruction of the first signal. B The sinusoidal signal sin(2πf B t) and cosine signal sin(2πf B t), and this signal is multiplied with the quadrature and in-phase components in the digital domain to generate the baseband modulated signal:

[0340] At the same time, the signal is mixed with the incident RF carrier signal cos(2πf c t) and multiply them to get:

[0341] The first term in G(t) is the desired single-sideband backscatter modulated signal, while the second term does not exist in practice due to the presence of negative frequencies. This allows the generation of a single-sideband backscatter modulated signal that does not contain image frequency components.

[0342] The principle of single-sideband backscatter modulation based on sine / cosine signals is as follows: first, a local oscillator signal is generated, and a sine signal and a cosine signal are generated at a specified frequency through the local oscillator signal, and a baseband modulation signal B(t) is generated based on the sine signal and the cosine signal; then, the obtained modulated signal must be up-converted to the carrier frequency; by using the radio frequency (RF) carrier signal sent by a third-party device (such as a reader) as the local oscillator source for up-conversion, the baseband modulation signal is multiplied by the RF carrier signal to finally generate the required single-sideband backscatter modulation signal.

[0343] In this embodiment 2, the first information includes at least the following information:

[0344] (1) The waveform type of the first signal is a sine or cosine signal, and the sine and cosine signals are controlled by the baseband signal;

[0345] (2) the frequency or signal period of the first signal;

[0346] (3) Alternatively, index information associated with the sine / cosine signal, where different index information corresponds to different frequency domain related parameters, time domain related parameters, signal amplitude / power / level values, etc. of the sine / cosine signal.

[0347] Example 3

[0348] In the second embodiment, the first device generates a sine or cosine signal using a local oscillator, resulting in high implementation complexity and power consumption. In this third embodiment, to reduce the implementation complexity and power consumption of the sine and cosine signals generated by the first device, a square wave signal can be generated to approximate the sine or cosine signal. Simultaneously, the first device generates a single-sideband backscatter modulated signal based on the square wave-approximated sine / cosine signal, as shown in Figure 7 . Based on the first information, the first device can generate the required first signal. In this case, the first signal includes multiple square wave signals with the same period / frequency, different levels, and different delays. The required sine and cosine signals are generated using the following method. Taking three square wave signals as an example, four level signals can be used to approximate the cosine signal. The approximate cosine signal can be represented as the superposition of three square wave signals S0(t), S1(t), and S2(t) with the same period / frequency, different levels, and different delays. Note that this can also be extended to the superposition of multiple square wave signals. For simplicity, the approximation using three square wave signals is used as an example.

[0349] The cosine signal generated by the approximate simulation of the above three square wave signals can be expressed as:

[0350] In the same way, the sinusoidal signal cos can also be generatedapprox (2πΔft), which will not be elaborated here.

[0351] Thus, by approximating the generated sine and cosine signals, the signal e can be generated. j2πΔft , expressed as:

[0352] For the above e j2πΔft , when n takes different values, different purposes can be achieved.

[0353] (a) When n = 0, only the positive frequencies are retained, generating a single-sideband signal.

[0354] (b) When n=1,2, it corresponds to the 3rd and 5th order harmonic components. And the above formula is calculated to be 0, thus eliminating the 3rd and 5th order harmonic components.

[0355] From this we can see that by using three square wave signals, the 3rd and 5th harmonic components can be eliminated while achieving single sideband modulation. More generally, when n = (8k+3) or (8k+5), Therefore, more harmonic components can be eliminated. It is worth noting that when more square wave signals are used to approximate the generation of sine and cosine signals, more harmonic components can theoretically be eliminated. After the sine and cosine signals are approximately simulated, the remaining single-sideband backscatter modulation processing and process are similar to those in Example 2 and will not be described in detail here.

[0356] At this time, the first information may include at least the following information:

[0357] (1) The frequency / period / BLF, signal amplitude / power / level, time delay or other time domain related information of the three square wave signals;

[0358] (2) the value of n;

[0359] (3) Alternatively, index information associated with the square wave signal, where different index information corresponds to different square wave combinations, including the number of square waves and the following contents of the square waves: frequency domain related parameters, time domain related parameters, different signal amplitude / power / level values, etc.

[0360] Example 4

[0361] In the fourth embodiment, index information related to single-sideband backscatter modulation is indicated by means of the first information. The first information may not need to include the signal parameters of the first signal, but only include the index information of the single-sideband baseband modulation method supported by the first device. For example, if the first device only supports one method of generating a single-sideband backscatter modulation signal (such as a method of actively generating a sine / cosine signal), the first information indicates the modulation method of the single-sideband backscatter modulation generated based on the method (such as a method of actively generating a sine / cosine signal), and the specific modulation parameters can be network configuration or network / protocol pre-configuration, etc. Alternatively, if the first device supports multiple methods of generating single-sideband backscatter modulation signals in the above-mentioned embodiments one to three, the network device (such as the fourth device) can indicate the single-sideband modulation method of the first device based on the single-sideband backscatter modulation method index, but the specific method of generating the single-sideband backscatter modulation signal is self-implemented by the first device, and only needs to meet the protocol requirements or predefined radio frequency indicators. Alternatively, there are multiple types of backscatter communication devices (i.e., the first device) in the network and they support different methods of generating single-sideband backscatter modulation signals. The network device (i.e., the fourth device) can indicate the single-sideband modulation method of the first device based on the single-sideband backscatter modulation method index, but the specific method of generating the single-sideband backscatter modulation signal is self-implemented by the first device and only needs to meet the protocol requirements or predefined radio frequency indicators. The single-sideband backscatter modulation method index and the corresponding single-sideband backscatter modulation parameters (such as modulation rate, modulation method, etc.) can be stored in the network device and the first device in the form of a mapping table.

[0362] In another possible solution, the backscatter communication device only supports one single-sideband backscatter modulation mode and the corresponding modulation parameters are also fixed. Then the first information can also be trigger information, which is used for the network device (fourth device) to trigger or instruct the first device to use this fixed single-sideband backscatter modulation mode for modulation.

[0363] Example 5

[0364] In this fifth embodiment, the signaling interaction process between the first device and the fourth device under several typical network deployment architectures is mainly provided. The same approach can be extended to the signaling interaction between the second device and the fourth device.

[0365] In the typical single-base architecture shown in Figure 8A, the second device is the fourth device. That is, the second device not only receives and demodulates the second signal, but also transmits the RF carrier signal to the first device and configures / instructs the first device on the first information. Alternatively, the device providing the RF carrier signal to the first device can also be a third device. In this case, the fourth device (i.e., the second device) determines the first information and transmits it to the first device. Based on the first information, the first device generates a first signal and a second signal and transmits the second signal to the second device (i.e., the fourth device). The second signal is a single-sideband backscatter modulated signal, optionally after necessary signal processing such as inserting a synchronization sequence and a pilot signal. This typical architecture includes base station-UE communication mode, UE-UE communication mode without network control in Sidelink, AP station (STA)-STA mode or STA-STA (i.e., Wi-Fi direct mode) in Wi-Fi, and communication modes in Bluetooth / Zigbee. That is, one of the communicating devices (here, the second device, as an example) has the ability to determine the first information and transmit it to the first device.

[0366] In another network deployment architecture, in addition to the first device and the second device directly participating in the communication, the fifth device (for example, the fourth device) acts as a network scheduling device to determine and configure the first information. According to the way of configuring or indicating the first information, it can be divided into the following sub-modes:

[0367] In sub-mode 1, as shown in Figure 8B , the fifth device (or fourth device) configures / instructs the first device with first information; the first device generates a first signal and a second signal based on the first information, and transmits the second signal to the second device. In this case, the device transmitting the RF carrier signal to the first device can be either the second device or a third device (e.g., a dedicated RF carrier device), which is not limited in this case.

[0368] In sub-mode 2, as shown in Figure 8C, the fifth device (or fourth device) first configures or indicates the first information to the second device, and then the second device indicates the first information to the first device. This scenario is similar to the scenario in which there are a master UE and a slave UE in a sidelink, where the base station configures or indicates the first information to the master UE, and then the master UE configures or indicates the first information to the slave UE.

[0369] In sub-mode 3, as shown in FIG8D , the fifth device (or fourth device) and the second device simultaneously configure or indicate the first information to the first device. In one possible solution, the fifth device (or fourth device) may first configure a set of first information in the first device through RRC signaling, and the second device may activate one of the first information through MAC CE, DCI, SCI, or L1 signaling. In another possible solution, the fifth device (or fourth device) configures or indicates part of the first information, and the second device configures or indicates part of the first information, and the two together constitute the complete first information.

[0370] It is worth noting that for the three network deployment architectures mentioned above, if the device that provides the RF carrier signal to the first device is the second device, there is no third device specifically used to supply power / provide the RF carrier signal. In another possible solution, if the second device is only a receiving device for the second signal, then there is also a third device in the above-mentioned network deployment architectures that provides the RF carrier signal to the first device, and the third device is also subject to the network scheduling of the fourth device. In the above solution, the fourth device can generate and send the RF carrier signal to the first device by configuring or indicating the third information to the third device, or the fourth device can send the RF carrier signal to the first device by configuring or indicating the third information to the second device. The third information is a signal parameter related to the RF carrier signal, including at least one of the following:

[0371] (a) Waveform of RF carrier signal;

[0372] (b) the transmission power of the radio frequency carrier signal;

[0373] (c) The bandwidth and center frequency of the RF carrier signal;

[0374] (d) Duration and period of the RF carrier signal.

[0375] In addition, the fourth device may configure or indicate second information to the second device for the second device to receive and demodulate the second signal. The second information is information related to reception or demodulation, and includes at least any one of the following:

[0376] (a) frequency domain or bandwidth parameters of the second signal;

[0377] (b) signal transmission parameters of the second signal;

[0378] (c) signal transmission parameters of the radio frequency carrier signal;

[0379] (d) Parameters related to the baseband signal related to the demodulated second signal, including at least: modulation bandwidth, signal period, modulation mode or type, etc.

[0380] Example 6

[0381] In the sixth embodiment of the present invention, a possible signaling configuration process diagram is provided. Taking Figure 9 as an example, the device that configures or indicates the first information, the second information, and the third information at this time is the fourth device, and the fourth device is not the same device as the first device, the second device, and the third device at this time, that is, a device with a network scheduling function. Before the first device completes the generation of the first signal and the second signal, and before the fourth device configures or indicates the first information, the first device, the second device, and the fourth device need to complete the signaling interaction process of capability reporting first. Optionally, the third device also needs to complete the signaling interaction process of capability reporting with the fourth device.

[0382] The specific interaction process (corresponding to the network deployment architecture shown in Figure 8B) includes: the fourth device configures the parameters of the RF carrier signal for the second device or the third device through the third information based on the acquired capability information and other information; the third device or the second device generates a RF carrier signal based on the third information and sends it to the first device. Furthermore, the fourth device determines the signal parameters of the first signal, the second signal, or the RF carrier signal based on the acquired capability information and other information, and indicates the parameters of the first signal, the second signal, or the RF carrier signal to the first device through the first information. The first device generates a first signal based on the first information, and generates a second signal by multiplying the first signal with the RF carrier signal, or by multiplying the reflection coefficient controlled by the first signal with the RF carrier signal; and sends the second signal to the second device.

[0383] It is worth noting that the other network deployment architectures in the third embodiment of this scheme can be improved based on the signaling process in Figure 9, such as: the integration of device functions (such as the integration of the second device and the third device), or the configuration or indication subject of the first information comes from multiple devices; or, the second device and the fourth device respectively configure multiple stages of the first information, that is, the fourth device first configures a set of first information (that is, the first information set), and the second device activates one of the first information; or, the fourth device configures or indicates the first information of the first device through the second device. These extended scenarios and signaling processes are all within the protection scope of the scheme of this application. Personnel in related fields can make corresponding extensions based on the embodiments of this application. These all belong to the scheme to be protected by this application.

[0384] The signal transmission method provided in the embodiment of the present application can be executed by a signal transmission device. In the embodiment of the present application, the signal transmission device provided in the embodiment of the present application is described by taking the signal transmission method executed by the signal transmission device as an example.

[0385] Please refer to FIG. 10 , which is a schematic diagram of the structure of a signal transmission device provided in an embodiment of the present application. The device is applied to a first device. As shown in FIG. 10 , the signal transmission device 100 includes:

[0386] A first generating module 101 is configured to generate a first signal according to first information, where the first signal is a baseband modulated signal;

[0387] A second generating module 102 is configured to generate a second signal based on the first signal and the received radio frequency carrier signal; wherein the radio frequency carrier signal is a single-tone signal, the second signal is a single-sideband backscatter modulated signal, and the bandwidth of the first signal is the same as the bandwidth of the second signal;

[0388] The sending module 103 is configured to send the second signal.

[0389] Optionally, the first signal is any one of the following: a square wave signal, a sine signal, a cosine signal, an approximately simulated sine signal, or an approximately simulated cosine signal;

[0390] Alternatively, the radio frequency carrier signal is any one of the following: a sine signal, a cosine signal.

[0391] Optionally, the first information includes at least one of the following:

[0392] parameter information of the first signal;

[0393] indication information related to parameter information of the first signal;

[0394] First index information associated with the sine signal or the cosine signal, the first index information being used to indicate parameter information of the associated sine signal or the cosine signal;

[0395] Second index information associated with the square wave signal, where the second index information is used to indicate parameter information of the associated square wave signal;

[0396] Third index information associated with the reflection coefficient, where the third index information is used to indicate relevant information of the associated reflection coefficient;

[0397] Fourth index information related to single-sideband baseband modulation, the fourth index information being used to indicate modulation parameters of the single-sideband baseband modulation configured by the network, predefined, or agreed upon by the protocol;

[0398] Trigger information related to single-sideband baseband modulation, where the trigger information is used to indicate predefined or protocol-agreed fixed single-sideband baseband modulation parameters.

[0399] Optionally, the parameter information of the first signal includes at least one of the following:

[0400] a waveform type of the first signal;

[0401] the frequency of the first signal;

[0402] a modulation rate of the first signal;

[0403] a modulation bandwidth of the first signal;

[0404] a backscatter link frequency of the first signal;

[0405] When the first signal is a sine signal or a cosine signal approximately simulated by a square wave signal, at least one of the following items of the square wave signal: one or more signal lengths, one or more signal delays, one or more signal amplitudes, one or more signal powers, and one or more signal level values;

[0406] the number of types of reflection coefficients associated with the first signal;

[0407] The value of the reflection coefficient related to the first signal.

[0408] Optionally, the first information includes frequency or bandwidth related information of the second signal; the second generating module 102 is specifically configured to: generate the second signal based on the frequency or bandwidth related information of the second signal; the frequency or bandwidth related information of the second signal includes at least one of the following:

[0409] a signal bandwidth of the second signal;

[0410] a center frequency of the second signal;

[0411] the lowest frequency point and signal bandwidth of the second signal;

[0412] The highest frequency point and signal bandwidth of the second signal;

[0413] the lowest frequency point and the highest frequency point of the second signal;

[0414] an indication of the signal bandwidth and upper and lower sidebands of the second signal;

[0415] The frequency shift related information of the second signal.

[0416] Optionally, the first information includes a signal transmission parameter of the second signal; the sending module 103 is specifically configured to: send the second signal based on the signal transmission parameter of the second signal; the signal transmission parameter of the second signal includes at least one of the following:

[0417] a modulation method of the second signal;

[0418] a modulation order or modulation level of the second signal;

[0419] a modulation rate or link frequency of the second signal;

[0420] time domain resources of the second signal;

[0421] signal power of the second signal;

[0422] an encoding method of the second signal;

[0423] an encoding bit rate of the second signal;

[0424] a signal waveform of the second signal;

[0425] The number of repeated transmissions of the second signal.

[0426] Optionally, the first information includes signal transmission parameters of the radio frequency carrier signal; the signal transmission device 100 further includes:

[0427] a receiving module, configured to receive the radio frequency carrier signal based on a signal transmission parameter of the radio frequency carrier signal;

[0428] The signal transmission parameter of the radio frequency carrier signal includes at least one of the following:

[0429] The signal waveform of the radio frequency carrier signal;

[0430] Time domain resource information of the radio frequency carrier signal;

[0431] Frequency domain resource information of the radio frequency carrier signal.

[0432] Optionally, the signal transmission device 100 further includes

[0433] The first processing module is configured to perform at least one of the following:

[0434] determining the first information;

[0435] receiving the first information from a second device, where the second device is a receiving device of the single-sideband backscatter modulated signal;

[0436] receiving the first information from a third device, where the third device is a device that provides the radio frequency carrier signal;

[0437] The first information is received from a fourth device, where the fourth device is a device having a network scheduling function.

[0438] Optionally, the first information is determined according to at least one of the following:

[0439] capability information of the first device;

[0440] capability information of the second device;

[0441] capability information of the third device;

[0442] channel state information, signal quality information, or communication statistics between the first device and the second device;

[0443] device status information of the first device;

[0444] device status information of the second device;

[0445] request information of the first device;

[0446] Data type information or business service quality information.

[0447] Optionally, when the first information is received by the first device, the first information is configured or indicated by at least one of the following:

[0448] Radio Resource Control (RRC) signaling;

[0449] Non-access stratum NAS signaling;

[0450] Media Access Control Element MAC CE;

[0451] Downlink control information DCI;

[0452] Secondary link control information SCI;

[0453] Layer 1 signaling;

[0454] Factory configuration information or default configuration information.

[0455] The signal transmission device 100 provided in the embodiment of the present application can implement each process implemented by the method embodiment shown in Figure 2 and achieve the same technical effect. To avoid repetition, it will not be described here.

[0456] Please refer to FIG11, which is a schematic diagram of the structure of a signal transmission device provided in an embodiment of the present application. The device is applied to the second device. As shown in FIG11, the signal transmission device 110 includes:

[0457] A first execution module 111, configured to execute a first operation according to the second information;

[0458] Among them, the first operation at least includes: receiving a second signal sent by the first device and demodulating the second signal; the second signal is a single-sideband backscatter modulation signal, the second signal is generated based on the first signal and the radio frequency carrier signal, the first signal is a baseband modulation signal, the bandwidth of the first signal is the same as the bandwidth of the second signal, and the radio frequency carrier signal is a single-tone signal.

[0459] Optionally, the baseband modulation signal is any one of the following: a square wave signal, a sine signal, a cosine signal, an approximately simulated sine signal, or an approximately simulated cosine signal;

[0460] Alternatively, the radio frequency carrier signal is any one of the following: a sine signal, a cosine signal.

[0461] Optionally, the second information includes at least one of the following:

[0462] signal transmission parameters of the second signal,

[0463] The frequency or bandwidth related information of the second signal.

[0464] Optionally, the signal transmission parameter of the second signal includes at least one of the following:

[0465] a modulation method of the second signal;

[0466] a modulation order or modulation level of the second signal;

[0467] a modulation rate or link frequency of the second signal;

[0468] time domain resources of the second signal;

[0469] signal power of the second signal;

[0470] an encoding method of the second signal;

[0471] an encoding bit rate of the second signal;

[0472] a signal waveform of the second signal;

[0473] The number of repeated transmissions of the second signal.

[0474] Optionally, the frequency or bandwidth related information of the second signal includes at least one of the following:

[0475] a signal bandwidth of the second signal;

[0476] a center frequency of the second signal;

[0477] the lowest frequency point and signal bandwidth of the second signal;

[0478] The highest frequency point and signal bandwidth of the second signal;

[0479] the lowest frequency point and the highest frequency point of the second signal;

[0480] an indication of the signal bandwidth and upper and lower sidebands of the second signal;

[0481] The frequency shift related information of the second signal.

[0482] Optionally, the signal transmission device 110 further includes:

[0483] The second processing module is configured to perform at least one of the following:

[0484] determining the second information;

[0485] receiving the second information from a first device, where the first device is a sending device of the single-sideband backscatter modulated signal;

[0486] receiving the second information from a third device, where the third device is a device that provides the radio frequency carrier signal;

[0487] The second information is received from a fourth device, where the fourth device is a device having a network scheduling function.

[0488] The signal transmission device 110 provided in the embodiment of the present application can implement each process implemented by the method embodiment shown in Figure 3 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0489] Please refer to FIG. 12 , which is a schematic diagram of the structure of an information configuration device provided in an embodiment of the present application. The device is applied to the fifth device. As shown in FIG. 12 , the information configuration device 120 includes:

[0490] A second execution module 121, configured to execute a second operation;

[0491] The second operation includes at least one of the following: sending the first information to the first device, sending the second information or the third information to the second device, and sending the third information to the third device;

[0492] Among them, the first information is used to generate a baseband modulation signal, generate a second signal or send a second signal; the second information is used to receive or demodulate the second signal, and the third information is used to generate or transmit a radio frequency carrier signal; the second signal is a single-sideband backscatter modulation signal, and the second signal is generated based on the first signal and the radio frequency carrier signal. The first signal is a baseband modulation signal, the bandwidth of the first signal is the same as the bandwidth of the second signal, and the radio frequency carrier signal is a single-tone signal.

[0493] Optionally, the baseband modulation signal is any one of the following: a square wave signal, a sine signal, a cosine signal, an approximately simulated sine signal, or an approximately simulated cosine signal;

[0494] Alternatively, the radio frequency carrier signal is any one of the following: a sine signal, a cosine signal.

[0495] Optionally, the first information includes at least one of the following:

[0496] parameter information of the first signal;

[0497] indication information related to parameter information of the first signal;

[0498] First index information associated with the sine signal or the cosine signal, the first index information being used to indicate parameter information of the associated sine signal or the cosine signal;

[0499] Second index information associated with the square wave signal, where the second index information is used to indicate parameter information of the associated square wave signal;

[0500] Third index information associated with the reflection coefficient, where the third index information is used to indicate relevant information of the associated reflection coefficient;

[0501] Fourth index information related to single-sideband baseband modulation, the fourth index information being used to indicate modulation parameters of the single-sideband baseband modulation configured by the network, predefined, or agreed upon by the protocol;

[0502] Trigger information related to single-sideband baseband modulation, the trigger information is used to indicate predefined or protocol-agreed fixed single-sideband baseband modulation parameters;

[0503] frequency or bandwidth related information of the second signal;

[0504] signal transmission parameters of the second signal;

[0505] signal transmission parameters of the radio frequency carrier signal.

[0506] Optionally, the parameter information of the first signal includes at least one of the following:

[0507] a waveform type of the first signal;

[0508] the frequency of the first signal;

[0509] a modulation rate of the first signal;

[0510] a modulation bandwidth of the first signal;

[0511] a backscatter link frequency of the first signal;

[0512] When the first signal is a sine signal or a cosine signal approximately simulated by a square wave signal, at least one of the following items of the square wave signal: one or more signal lengths, one or more signal delays, one or more signal amplitudes, one or more signal powers, and one or more signal level values;

[0513] the number of types of reflection coefficients associated with the first signal;

[0514] The value of the reflection coefficient related to the first signal.

[0515] Optionally, the frequency or bandwidth related information of the second signal includes at least one of the following:

[0516] a signal bandwidth of the second signal;

[0517] a center frequency of the second signal;

[0518] the lowest frequency point and signal bandwidth of the second signal;

[0519] The highest frequency point and signal bandwidth of the second signal;

[0520] the lowest frequency point and the highest frequency point of the second signal;

[0521] an indication of the signal bandwidth and upper and lower sidebands of the second signal;

[0522] frequency shift related information of the second signal;

[0523] Alternatively, the signal transmission parameter of the second signal includes at least one of the following:

[0524] a modulation method of the second signal;

[0525] a modulation order or modulation level of the second signal;

[0526] a modulation rate or link frequency of the second signal;

[0527] time domain resources of the second signal;

[0528] signal power of the second signal;

[0529] an encoding method of the second signal;

[0530] an encoding bit rate of the second signal;

[0531] a signal waveform of the second signal;

[0532] The number of repeated transmissions of the second signal.

[0533] Optionally, the signal transmission parameter of the radio frequency carrier signal includes at least one of the following: a signal waveform of the radio frequency carrier signal;

[0534] signal power of the radio frequency carrier signal;

[0535] Time domain resource information of the radio frequency carrier signal;

[0536] Frequency domain resource information of the radio frequency carrier signal.

[0537] Optionally, the second information includes at least one of the following:

[0538] signal transmission parameters of the second signal;

[0539] The frequency or bandwidth related information of the second signal.

[0540] Optionally, the signal transmission parameter of the second signal includes at least one of the following:

[0541] a modulation method of the second signal;

[0542] a modulation order or modulation level of the second signal;

[0543] a modulation rate or link frequency of the second signal;

[0544] time domain resources of the second signal;

[0545] signal power of the second signal;

[0546] an encoding method of the second signal;

[0547] an encoding bit rate of the second signal;

[0548] a signal waveform of the second signal;

[0549] The number of repeated transmissions of the second signal.

[0550] Optionally, the frequency or bandwidth related information of the second signal includes at least one of the following:

[0551] a signal bandwidth of the second signal;

[0552] a center frequency of the second signal;

[0553] the lowest frequency point and signal bandwidth of the second signal;

[0554] The highest frequency point and signal bandwidth of the second signal;

[0555] the lowest frequency point and the highest frequency point of the second signal;

[0556] an indication of the signal bandwidth and upper and lower sidebands of the second signal;

[0557] The frequency shift related information of the second signal.

[0558] Optionally, the third information includes at least one of the following:

[0559] The signal waveform of the radio frequency carrier signal;

[0560] signal power or signal amplitude of the radio frequency carrier signal;

[0561] Time domain resource information of the radio frequency carrier signal;

[0562] Frequency domain resource information of the radio frequency carrier signal;

[0563] The preamble or synchronization sequence of the radio frequency carrier signal.

[0564] Optionally, the second execution module 121 is configured to: execute the second operation by at least one of the following:

[0565] Radio Resource Control (RRC) signaling;

[0566] Non-access stratum NAS signaling;

[0567] Media Access Control Element MAC CE;

[0568] Downlink control information DCI;

[0569] Secondary link control information SCI;

[0570] Layer 1 signaling.

[0571] Optionally, the fifth device is any one of the following:

[0572] the first device;

[0573] the second device;

[0574] the third device;

[0575] A fourth device having a network scheduling function.

[0576] The signal transmission device 120 provided in the embodiment of the present application can implement each process implemented by the method embodiment shown in Figure 4 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0577] As shown in Figure 13, an embodiment of the present application further provides a communication device 130, including a processor 131 and a memory 132, wherein the memory 132 stores programs or instructions that can be run on the processor 131. For example, when the communication device 130 is a first device, the program or instruction is executed by the processor 131 to implement the various steps of the method embodiment shown in Figure 2 above, and can achieve the same technical effect. When the communication device 130 is a second device, the program or instruction is executed by the processor 131 to implement the various steps of the method embodiment shown in Figure 3 above, and can achieve the same technical effect. When the communication device 130 is a fifth device, the program or instruction is executed by the processor 131 to implement the various steps of the method embodiment shown in Figure 4 above, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0578] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned signal transmission method embodiment or the various processes of the above-mentioned information configuration method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0579] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), random-access memory (RAM), a magnetic disk, or an optical disk. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0580] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned signal transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0581] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0582] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement the various processes of the above-mentioned signal transmission method embodiment, or to implement the various processes of the above-mentioned information configuration method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0583] An embodiment of the present application also provides a communication system, including at least two of a first device, a second device, and a fifth device, wherein the first device can be used to execute the steps of the method shown in Figure 2 above, the second device can be used to execute the steps of the method shown in Figure 3 above, and the fifth device can be used to execute the steps of the method shown in Figure 4 above.

[0584] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0585] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general-purpose hardware platform, or of course, by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes a number of instructions for enabling a terminal or network-side device to execute the methods described in each embodiment of the present application.

[0586] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of this application and the scope of protection of the claims. These implementation methods are all within the protection of this application.

Claims

1. A signal transmission method, comprising: The first device generates a first signal according to the first information, where the first signal is a baseband modulated signal; The first device generates a second signal based on the first signal and a received radio frequency carrier signal; wherein the radio frequency carrier signal is a single-tone signal, and the second signal is a single-sideband backscatter modulated signal; and the bandwidth of the first signal is the same as the bandwidth of the second signal; The first device sends the second signal.

2. The method according to claim 1, wherein The first signal is any one of the following: a square wave signal, a sine signal, a cosine signal, an approximately simulated sine signal, or an approximately simulated cosine signal; or, The radio frequency carrier signal is any one of the following: a sine signal and a cosine signal.

3. The method according to claim 1 or 2, wherein: The first information includes at least one of the following: parameter information of the first signal; indication information related to parameter information of the first signal; First index information associated with the sine signal or the cosine signal, the first index information being used to indicate parameter information of the associated sine signal or the cosine signal; Second index information associated with the square wave signal, where the second index information is used to indicate parameter information of the associated square wave signal; Third index information associated with the reflection coefficient, where the third index information is used to indicate relevant information of the associated reflection coefficient; Fourth index information related to single-sideband baseband modulation, the fourth index information being used to indicate modulation parameters of the single-sideband baseband modulation configured by the network, predefined, or agreed upon by the protocol; Trigger information related to single-sideband baseband modulation, where the trigger information is used to indicate predefined or protocol-agreed fixed single-sideband baseband modulation parameters.

4. The method according to claim 3, wherein: The parameter information of the first signal includes at least one of the following: a waveform type of the first signal; the frequency of the first signal; a modulation rate of the first signal; a modulation bandwidth of the first signal; a backscatter link frequency of the first signal; When the first signal is a sine signal or a cosine signal approximately simulated by a square wave signal, at least one of the following items of the square wave signal: one or more signal lengths, one or more signal delays, one or more signal amplitudes, one or more signal powers, and one or more signal level values; the number of types of reflection coefficients associated with the first signal; The value of the reflection coefficient related to the first signal.

5. The method according to any one of claims 1 to 4, wherein: The first information includes frequency or bandwidth related information of the second signal; Generating the second signal includes: The first device generates the second signal based on frequency or bandwidth related information of the second signal; The frequency or bandwidth related information of the second signal includes at least one of the following: a signal bandwidth of the second signal; a center frequency of the second signal; the lowest frequency point and signal bandwidth of the second signal; The highest frequency point and signal bandwidth of the second signal; the lowest frequency point and the highest frequency point of the second signal; an indication of the signal bandwidth and upper and lower sidebands of the second signal; The frequency shift related information of the second signal.

6. The method according to any one of claims 1 to 5, wherein: The first information includes a signal transmission parameter of the second signal; and sending the second signal includes: The first device sends the second signal based on the signal transmission parameter of the second signal; The signal transmission parameter of the second signal includes at least one of the following: a modulation method of the second signal; a modulation order or modulation level of the second signal; a modulation rate or link frequency of the second signal; time domain resources of the second signal; signal power of the second signal; an encoding method of the second signal; an encoding bit rate of the second signal; a signal waveform of the second signal; The number of repeated transmissions of the second signal.

7. The method according to any one of claims 1 to 6, wherein: The first information includes signal transmission parameters of the radio frequency carrier signal; the method further includes: The first device receives the radio frequency carrier signal based on the signal transmission parameter of the radio frequency carrier signal; The signal transmission parameter of the radio frequency carrier signal includes at least one of the following: The signal waveform of the radio frequency carrier signal; Time domain resource information of the radio frequency carrier signal; Frequency domain resource information of the radio frequency carrier signal.

8. The method according to any one of claims 1 to 7, wherein: The method further comprises at least one of the following: The first device determines the first information; The first device receives the first information from a second device, where the second device is a receiving device of the single-sideband backscatter modulated signal; The first device receives the first information from a third device, where the third device is a device that provides the radio frequency carrier signal; The first device receives the first information from a fourth device, where the fourth device is a device having a network scheduling function.

9. The method according to claim 8, wherein The first information is determined according to at least one of the following: capability information of the first device; capability information of the second device; capability information of the third device; channel state information, signal quality information, or communication statistics between the first device and the second device; device status information of the first device; device status information of the second device; request information of the first device; Data type information or business service quality information.

10. A signal transmission method, comprising: The second device performs the first operation according to the second information; Among them, the first operation at least includes: receiving a second signal sent by the first device and demodulating the second signal; the second signal is a single-sideband backscatter modulation signal, the second signal is generated based on the first signal and the radio frequency carrier signal, the first signal is a baseband modulation signal, the bandwidth of the first signal is the same as the bandwidth of the second signal, and the radio frequency carrier signal is a single-tone signal.

11. The method according to claim 10, wherein: The baseband modulation signal is any one of the following: a square wave signal, a sine signal, a cosine signal, an approximately simulated sine signal, or an approximately simulated cosine signal; or, The radio frequency carrier signal is any one of the following: a sine signal and a cosine signal.

12. The method according to claim 10 or 11, wherein: The second information includes at least one of the following: signal transmission parameters of the second signal, The frequency or bandwidth related information of the second signal.

13. The method according to claim 12, wherein: The signal transmission parameter of the second signal includes at least one of the following: a modulation method of the second signal; a modulation order or modulation level of the second signal; a modulation rate or link frequency of the second signal; time domain resources of the second signal; signal power of the second signal; an encoding method of the second signal; an encoding bit rate of the second signal; a signal waveform of the second signal; The number of repeated transmissions of the second signal.

14. The method according to claim 12, wherein: The frequency or bandwidth related information of the second signal includes at least one of the following: a signal bandwidth of the second signal; a center frequency of the second signal; the lowest frequency point and signal bandwidth of the second signal; The highest frequency point and signal bandwidth of the second signal; the lowest frequency point and the highest frequency point of the second signal; an indication of the signal bandwidth and upper and lower sidebands of the second signal; The frequency shift related information of the second signal.

15. The method according to any one of claims 10 to 14, wherein: The method further comprises at least one of the following: The second device determines the second information; The second device receives the second information from the first device, where the first device is a sending device of the single-sideband backscatter modulated signal; The second device receives the second information from a third device, where the third device is a device that provides the radio frequency carrier signal; The second device receives the second information from a fourth device, where the fourth device is a device having a network scheduling function.

16. An information configuration method, comprising: The fifth device performs a second operation; The second operation includes at least one of the following: sending the first information to the first device, sending the second information or the third information to the second device, and sending the third information to the third device; Among them, the first information is used to generate a baseband modulation signal, generate a second signal or send a second signal; the second information is used to receive or demodulate the second signal, and the third information is used to generate or transmit a radio frequency carrier signal; the second signal is a single-sideband backscatter modulation signal, and the second signal is generated based on the first signal and the radio frequency carrier signal. The first signal is a baseband modulation signal, the bandwidth of the first signal is the same as the bandwidth of the second signal, and the radio frequency carrier signal is a single-tone signal.

17. The method according to claim 16, wherein The baseband modulation signal is any one of the following: a square wave signal, a sine signal, a cosine signal, an approximately simulated sine signal, or an approximately simulated cosine signal; or, The radio frequency carrier signal is any one of the following: a sine signal and a cosine signal.

18. The method according to claim 16 or 17, wherein The first information includes at least one of the following: parameter information of the first signal; indication information related to parameter information of the first signal; First index information associated with the sine signal or the cosine signal, the first index information being used to indicate parameter information of the associated sine signal or the cosine signal; Second index information associated with the square wave signal, where the second index information is used to indicate parameter information of the associated square wave signal; Third index information associated with the reflection coefficient, where the third index information is used to indicate relevant information of the associated reflection coefficient; Fourth index information related to single-sideband baseband modulation, the fourth index information being used to indicate modulation parameters of the single-sideband baseband modulation configured by the network, predefined, or agreed upon by the protocol; Trigger information related to single-sideband baseband modulation, the trigger information is used to indicate predefined or protocol-agreed fixed single-sideband baseband modulation parameters; frequency or bandwidth related information of the second signal; signal transmission parameters of the second signal; signal transmission parameters of the radio frequency carrier signal.

19. The method according to any one of claims 16 to 18, wherein: The second information includes at least one of the following: signal transmission parameters of the second signal; The frequency or bandwidth related information of the second signal.

20. The method according to any one of claims 16 to 19, wherein The third information includes at least one of the following: The signal waveform of the radio frequency carrier signal; signal power or signal amplitude of the radio frequency carrier signal; Time domain resource information of the radio frequency carrier signal; Frequency domain resource information of the radio frequency carrier signal; The preamble or synchronization sequence of the radio frequency carrier signal.

21. A signal transmission device, comprising: A first generating module, configured to generate a first signal according to the first information, where the first signal is a baseband modulated signal; A second generating module, configured to generate a second signal based on the first signal and a received radio frequency carrier signal; wherein the radio frequency carrier signal is a single-tone signal, the second signal is a single-sideband backscatter modulated signal, and the bandwidth of the first signal is the same as the bandwidth of the second signal; A sending module is used to send the second signal.

22. The device according to claim 21, wherein The first signal is any one of the following: a square wave signal, a sine signal, a cosine signal, an approximately simulated sine signal, or an approximately simulated cosine signal; or, The radio frequency carrier signal is any one of the following: a sine signal and a cosine signal.

23. The device according to claim 21 or 22, wherein The first information includes at least one of the following: parameter information of the first signal; indication information related to parameter information of the first signal; First index information associated with the sine signal or the cosine signal, the first index information being used to indicate parameter information of the associated sine signal or the cosine signal; Second index information associated with the square wave signal, where the second index information is used to indicate parameter information of the associated square wave signal; Third index information associated with the reflection coefficient, where the third index information is used to indicate relevant information of the associated reflection coefficient; Fourth index information related to single-sideband baseband modulation, the fourth index information being used to indicate modulation parameters of the single-sideband baseband modulation configured by the network, predefined, or agreed upon by the protocol; Trigger information related to single-sideband baseband modulation, where the trigger information is used to indicate predefined or protocol-agreed fixed single-sideband baseband modulation parameters.

24. The device according to any one of claims 21 to 23, further comprising: The first processing module is configured to perform at least one of the following: determining the first information; receiving the first information from a second device, where the second device is a receiving device of the single-sideband backscatter modulated signal; receiving the first information from a third device, where the third device is a device that provides the radio frequency carrier signal; The first information is received from a fourth device, where the fourth device is a device having a network scheduling function.

25. A signal transmission device, comprising: A first execution module, configured to execute a first operation according to the second information; Among them, the first operation at least includes: receiving a second signal sent by the first device and demodulating the second signal; the second signal is a single-sideband backscatter modulation signal, the second signal is generated based on the first signal and the radio frequency carrier signal, the first signal is a baseband modulation signal, the bandwidth of the first signal is the same as the bandwidth of the second signal, and the radio frequency carrier signal is a single-tone signal.

26. The device according to claim 25, wherein The second information includes at least one of the following: signal transmission parameters of the second signal, The frequency or bandwidth related information of the second signal.

27. An information configuration device comprising: A second execution module, configured to execute a second operation; The second operation includes at least one of the following: sending the first information to the first device, sending the second information or the third information to the second device, and sending the third information to the third device; Among them, the first information is used to generate a baseband modulation signal, generate a second signal or send a second signal; the second information is used to receive or demodulate the second signal, and the third information is used to generate or transmit a radio frequency carrier signal; the second signal is a single-sideband backscatter modulation signal, and the second signal is generated based on the first signal and the radio frequency carrier signal. The first signal is a baseband modulation signal, the bandwidth of the first signal is the same as the bandwidth of the second signal, and the radio frequency carrier signal is a single-tone signal.

28. The apparatus according to claim 27, wherein The third information includes at least one of the following: The signal waveform of the radio frequency carrier signal; signal power or signal amplitude of the radio frequency carrier signal; Time domain resource information of the radio frequency carrier signal; Frequency domain resource information of the radio frequency carrier signal; The preamble or synchronization sequence of the radio frequency carrier signal.

29. A communication device comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, it implements the steps of the signal transmission method according to any one of claims 1 to 9, or implements the steps of the signal transmission method according to any one of claims 10 to 15, or implements the steps of the signal configuration method according to any one of claims 16 to 20.

30. A readable storage medium storing a program or instruction, wherein the program or instruction, when executed by a processor, implements the steps of the signal transmission method according to any one of claims 1 to 9, or implements the steps of the signal transmission method according to any one of claims 10 to 15, or implements the steps of the signal configuration method according to any one of claims 16 to 20.

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