Signal transmission method, device and system

Abstract

The invention provides a signal transmission method, device and system, and the method comprises the steps: transmitting a narrowband signal to a receiving end, and enabling the receiving end to determine initial time-frequency synchronization information through the narrowband signal; an ultra-wideband signal is sent to the receiving end, the ultra-wideband signal comprises a channel impulse response training sequence CTS field, and the CTS field is used for the receiving end to determine a channel impulse response; wherein the CTS field comprises at least one CTS symbol, and the CTS symbol comprises at least one first preamble symbol or is generated by spreading the at least one first preamble symbol. According to the invention, the chip area, the operation power consumption and the operation cost of the ultra-wide-band system can be reduced while the ultra-wide-band system is applied to maintain high-precision distance measurement, and the distance measurement efficiency is improved.

Description

Signal transmission method, device and system Technical Field

[0001] The present application relates to the field of communications, and in particular to a signal transmission method, device, and system. Background Art

[0002] Ultra-wideband (UWB) wireless technology is a wireless carrier communication technology that uses high-frequency bandwidth. It uses narrow time domain signals to transmit data. The signal resolution is strong, so it has strong multipath resolution capabilities and can ensure high ranging accuracy in complex multipath environments.

[0003] Currently, ultra-wideband wireless technology typically uses the high-rate pulse repetition frequency (HPR) UWB protocol, based on the Institute of Electrical and Electronics Engineers (IEEE) 802.15.4a / z standards, for ranging and positioning. The signal format defined by the HPR UWB protocol supports both data transmission and ranging. During signal transmission, the transmitting UWB system sends an UWB signal in the format defined by the HPR UWB protocol, and the receiving UWB system performs ranging based on the received UWB signal.

[0004] However, the signal in the HPR UWB protocol supports data transmission and ranging functions, so the signal transmission time in the air is long and the complexity of the ultra-wideband system is high, resulting in the ultra-wideband system needing to operate at high power consumption and high operating costs, affecting ranging efficiency.

[0005] Summary of the Invention

[0006] The present application provides a signal transmission method, device, and system that can reduce the chip area, operating power consumption, and operating cost of an ultra-wideband system while maintaining high-precision ranging using an ultra-wideband system, thereby improving ranging efficiency.

[0007] In a first aspect, the present application provides a signal transmission method, the method comprising: sending a narrowband signal to a receiving end, the narrowband signal being used by the receiving end to determine initial time-frequency synchronization information; sending an ultra-wideband signal to the receiving end, the ultra-wideband signal comprising a channel impulse response training sequence CTS field, the CTS field being used by the receiving end to determine a channel impulse response; wherein the CTS field comprises at least one CTS symbol, the CTS symbol comprising at least one first preamble symbol or being generated by spectrum spreading of at least one first preamble symbol.

[0008] There is a null signal interval between the ultra-wideband signal and the narrowband signal. The length of the null signal interval can be customized, and the embodiment of the present application does not limit its specific value.

[0009] When a CTS symbol is generated by spreading at least one first preamble symbol, the number of bits in the spreading code is the same as the number of first preamble symbols in the CTS field, and each first preamble symbol corresponds to a value in the spreading code. The at least one first preamble symbol can be multiplied by the corresponding value in the spreading code to generate the CTS symbol. The spreading code is a sequence with good correlation properties, such as a binary sequence or a ternary sequence.

[0010] In this method, initial time-frequency synchronization information is determined using narrowband signals, and ranging is performed using the ultra-wideband signal structure provided in the embodiments of this application. This achieves ranging by combining narrowband with ultra-wideband. The ultra-wideband system eliminates the need to determine initial time-frequency synchronization information, reducing the over-the-air transmission time of the ultra-wideband signal and the complexity of the ultra-wideband system. This reduces the chip area, operating power consumption, and operating costs of the ultra-wideband system while maintaining high-precision ranging using the ultra-wideband system, thereby improving ranging efficiency.

[0011] In a possible implementation, the ultra-wideband signal further includes a synchronization SYNC field; the SYNC field is used by the receiving end to determine target time-frequency synchronization information based on the initial time-frequency synchronization information, and the SYNC field includes at least one second preamble symbol.

[0012] The target time-frequency synchronization information is used for high-precision synchronization of ultra-wideband signals. There is a null signal interval between the SYNC field and the first CTS symbol of the CTS field. The length of the null signal interval can be customized and its specific value is not limited in this embodiment of the application.

[0013] The SYNC field can further achieve high-precision synchronization of the CTS field of the ultra-wideband signal. Since the accuracy of the channel impulse response is closely related to the synchronization accuracy of the CTS field, the SYNC field can achieve high-precision synchronization to improve the accuracy of the channel impulse response, thereby ensuring good ranging performance when using the channel impulse response for ranging. In addition, the synchronization accuracy of different narrowband systems varies. The ultra-wideband system achieves further synchronization based on the synchronization of the narrowband system based on the SYNC field, allowing the ultra-wideband system to flexibly adapt to the synchronization accuracy of different narrowband systems, thereby improving the feasibility and wide application of the method of the embodiment of the present application.

[0014] In a possible implementation, the first preamble symbol includes a first preamble code or is generated by spectrum spreading the first preamble code, and the second preamble symbol includes a second preamble code or is generated by spectrum spreading the second preamble code.

[0015] The first preamble code or the second preamble code is a sequence with good correlation characteristics, for example, it can be a binary sequence or a ternary sequence. The embodiment of the present application does not limit the first preamble code and the second preamble code. The sequence with good correlation characteristics is not easily interfered with by external signals, and can maintain the high precision of the channel impulse response when the subsequent receiving end determines the channel impulse response based on the CTS field, thereby maintaining the high-precision ranging of the ultra-wideband system. And when the first preamble symbol is generated by the first preamble code spread spectrum, the first preamble symbol can be made not easily interfered with by external signals and unpredictable. Similarly, the second preamble code generated by the second preamble code spread spectrum is not easily interfered with by external signals and is unpredictable, thereby improving the anti-interference ability and security of the ultra-wideband signal.

[0016] In a possible implementation, there are multiple CTS symbols, and multiple CTS symbols form multiple CTS segments. There is an empty signal interval between any two CTS segments.

[0017] There is no signal transmission during the time period corresponding to the null signal interval. In this way, when the ultra-wideband signal is sent in the form of a pulse signal, the duty cycle of the pulse signal can be reduced. While meeting the frequency band usage regulations of the ultra-wideband, the transmission power of the ultra-wideband signal is increased, and the attenuation of the ultra-wideband signal during transmission is reduced, thereby expanding the coverage range of the ultra-wideband signal.

[0018] In a second aspect, the present application provides a signal transmission method, the method comprising: determining initial time-frequency synchronization information based on a narrowband signal sent by a transmitter; receiving an ultra-wideband signal sent by the transmitter, the ultra-wideband signal comprising a channel impulse response training sequence CTS field, the CTS field comprising at least one CTS symbol, the CTS symbol comprising at least one first preamble symbol or generated by spectrum spreading of at least one first preamble symbol; performing synchronization processing on the ultra-wideband signal according to the initial time-frequency synchronization information; and determining a channel impulse response based on the CTS field.

[0019] In a possible implementation, the receiving end directly performs synchronization processing on the CTS field of the ultra-wideband signal according to the initial time-frequency synchronization information.

[0020] In one possible implementation, the ultra-wideband signal also includes a synchronization SYNC field, the SYNC field includes at least one second leading symbol, and the synchronization processing of the ultra-wideband signal according to the initial time-frequency synchronization information includes: determining target time-frequency synchronization information based on the initial time-frequency synchronization information and the SYNC field; and synchronization processing of the ultra-wideband signal according to the target time-frequency synchronization information.

[0021] In a possible implementation, the first preamble symbol includes a first preamble code or is generated by spectrum spreading the first preamble code, and the second preamble symbol includes a second preamble code or is generated by spectrum spreading the second preamble code.

[0022] In a possible implementation, there are multiple CTS symbols, and multiple CTS symbols form multiple CTS segments. There is an empty signal interval between any two CTS segments.

[0023] In a third aspect, the present application provides a signal transmission device, comprising: a first sending module for sending a narrowband signal to a receiving end, wherein the narrowband signal is used by the receiving end to determine initial time-frequency synchronization information; a second sending module for sending an ultra-wideband signal to the receiving end, wherein the ultra-wideband signal includes a channel impulse response training sequence CTS field, and the CTS field is used by the receiving end to determine the channel impulse response; wherein the CTS field includes at least one CTS symbol, and the CTS symbol includes at least one first preamble symbol or is generated by spreading at least one first preamble symbol.

[0024] In a possible implementation, the ultra-wideband signal further includes a synchronization SYNC field; the SYNC field is used by the receiving end to determine target time-frequency synchronization information based on the initial time-frequency synchronization information, and the SYNC field includes at least one second preamble symbol.

[0025] In a possible implementation, the first preamble symbol includes a first preamble code or is generated by spectrum spreading the first preamble code, and the second preamble symbol includes a second preamble code or is generated by spectrum spreading the second preamble code.

[0026] In a possible implementation, there are multiple CTS symbols, and multiple CTS symbols form multiple CTS segments. There is an empty signal interval between any two CTS segments.

[0027] In a fourth aspect, the present application provides a signal transmission device, the device comprising: a first determination module for determining initial time-frequency synchronization information based on a narrowband signal sent by a transmitting end; a receiving module for receiving an ultra-wideband signal sent by the transmitting end, the ultra-wideband signal comprising a channel impulse response training sequence CTS field, the CTS field comprising at least one CTS symbol, the CTS symbol comprising at least one first preamble symbol or generated by spectrum spreading of at least one first preamble symbol; a synchronization module for performing synchronization processing on the ultra-wideband signal according to the initial time-frequency synchronization information; and a second determination module for determining the channel impulse response based on the CTS field.

[0028] In one possible implementation, the ultra-wideband signal also includes a synchronization SYNC field, the SYNC field includes at least one second leading symbol, and the synchronization module is specifically used to: determine the target time-frequency synchronization information based on the initial time-frequency synchronization information and the SYNC field; and synchronize the ultra-wideband signal according to the target time-frequency synchronization information.

[0029] In a possible implementation, the first preamble symbol includes a first preamble code or is generated by spectrum spreading the first preamble code, and the second preamble symbol includes a second preamble code or is generated by spectrum spreading the second preamble code.

[0030] In a possible implementation, there are multiple CTS symbols, and multiple CTS symbols form multiple CTS segments. There is an empty signal interval between any two CTS segments.

[0031] In a fifth aspect, the present application provides a signal transmission device, which includes: one or more processors; a memory for storing one or more computer programs or instructions; when the one or more computer programs or instructions are executed by the one or more processors, the one or more processors implement the method as described in any one of the first aspects.

[0032] In a sixth aspect, the present application provides a signal transmission device, comprising: one or more processors; a memory for storing one or more computer programs or instructions; when the one or more computer programs or instructions are executed by the one or more processors, the one or more processors implement a method as described in any one of the second aspects.

[0033] In a seventh aspect, the present application provides a signal transmission device, comprising a processor for executing the method as described in any one of the first aspects.

[0034] In an eighth aspect, the present application provides a signal transmission device, comprising a processor for executing the method as described in any one of the second aspects.

[0035] In the ninth aspect, the present application provides a signal transmission system, the system comprising: a transmitting end and a receiving end; the transmitting end comprises the signal transmission device as described in any one of the third aspects, the signal transmission device as described in any one of the fifth aspects, or the signal transmission device as described in any one of the seventh aspects, and the receiving end comprises the signal transmission device as described in any one of the fourth aspects, the signal transmission device as described in any one of the sixth aspects, or the signal transmission device as described in any one of the eighth aspects.

[0036] In a tenth aspect, the present application provides a computer-readable storage medium comprising a computer program or instructions, which, when executed on a computer, causes the computer to perform the method described in any one of the first and second aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] FIG1 is a schematic diagram of a flow chart of a signal transmission method provided in an embodiment of the present application;

[0038] FIG2 is a schematic diagram of a flow chart of another signal transmission method provided in an embodiment of the present application;

[0039] FIG3 is a flow chart of another signal transmission method provided in an embodiment of the present application;

[0040] FIG4 is a schematic diagram of the formats of a narrowband signal and an ultra-wideband signal provided in an embodiment of the present application;

[0041] FIG5 is a schematic diagram of the structure of a SYNC field provided in an embodiment of the present application;

[0042] FIG6 is a schematic diagram of the structure of a CTS field provided in an embodiment of the present application;

[0043] FIG7 is a schematic diagram of the structure of a CTS segment provided in an embodiment of the present application;

[0044] FIG8 is a block diagram of a signal transmission device provided in an embodiment of the present application;

[0045] FIG9 is a block diagram of another signal transmission device provided in an embodiment of the present application;

[0046] FIG10 is a schematic structural diagram of an electronic device provided in an embodiment of the present application;

[0047] FIG11 is a schematic structural diagram of a signal transmission device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0048] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0049] The terms "first," "second," and the like in the description, embodiments, claims, and drawings of this application are used solely for descriptive purposes and are not to be construed as indicating or implying relative importance or order. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions, such as, for example, inclusion of a series of steps or units. A method, system, product, or apparatus is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0050] It should be understood that in this application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0051] Ultra-wideband wireless technology uses narrow time-domain signals to transmit data. For example, impulse radio ultra-wideband (IR-UWB) uses nanosecond-level pulses to transmit data. This results in high signal resolution, enabling strong multipath resolution and centimeter-level ranging accuracy in complex multipath environments (such as indoors). Currently, the most commonly used ranging protocol in ultra-wideband technology is the HPR UWB protocol under the IEEE 802.15.4a / z standard.

[0052] The HPR UWB protocol defines multiple signal formats that support both data transmission and ranging. A scrambled timestamp sequence (STS) is added to the signal to ensure signal security. During signal transmission, the transmitting UWB system sends the UWB signal in the signal format defined by the HPR UWB protocol, and the receiving UWB system performs ranging based on the received UWB signal.

[0053] However, the HPR UWB protocol supports both data transmission and ranging. This results in a longer signal transmission time over the air due to the low data transmission efficiency of ultra-wideband systems. Furthermore, ultra-wideband systems require a greater number of functional modules to implement data transmission and ranging, such as time-frequency synchronization, CIR (Channel Impulse Response) estimation, scrambled timestamp sequence (STS) detection, data monitoring, and forward error correction (FEC) decoding. This results in higher power consumption and operating costs for ultra-wideband systems, impacting ranging efficiency.

[0054] An embodiment of the present application provides a signal transmission method to reduce the operating power consumption and operating cost of an ultra-wideband system while maintaining the high ranging accuracy of the ultra-wideband system. The method can be applied to a signal transmission system, which includes a transmitting end and a receiving end, and both the transmitting end and the receiving end include an ultra-wideband system and a narrowband (NB) system. A narrowband system uses a carrier signal with a narrow bandwidth to transmit data, which has the advantages of low operating power consumption and low operating cost. For example, narrowband systems may include: wireless fidelity (WIFI) systems, Bluetooth, and ZigBee systems.

[0055] It should be noted that in the embodiments of the present application, the device used to send signals is called a transmitter, and the device used to receive signals is called a receiver. The transmitter can also receive signals, and the receiver can also send signals. The embodiments of the present application do not limit the functions of the devices.

[0056] Please refer to FIG1 , which is a flow chart of a signal transmission method provided in an embodiment of the present application. The method is applied to a transmitting end in a signal transmission system, which includes an ultra-wideband system and a narrowband system. The method may include the following process:

[0057] 101. Send a narrowband signal to a receiving end, where the narrowband signal is used by the receiving end to determine initial time-frequency synchronization information.

[0058] The narrowband system at the transmitting end sends a narrowband signal to the receiving end. The narrowband signal may include a physical layer protocol data unit (PPDU).

[0059] 102. Send an ultra-wideband signal to a receiving end, where the ultra-wideband signal includes a CIR training sequence field. The CIR training sequence field is used by the receiving end to determine a channel impulse response. The CIR training sequence field includes at least one CIR training sequence symbol. The CIR training sequence symbol includes at least one first preamble symbol or is generated by spreading the at least one first preamble symbol.

[0060] The UWB system at the transmitting end sends an UWB signal to the receiving end. The UWB signal is transmitted to the receiving end in a narrow time domain signal form (e.g., a narrow pulse form). The UWB signal may include a PPDU. A null signal interval exists between the UWB signal and the narrowband signal. The duration of this null signal interval can be customized, and the specific value is not limited in this embodiment of the application.

[0061] When the CIR training sequence (CTS) field includes multiple CTS symbols, the multiple CTS symbols may or may not contain the same CTS symbol. When the CTS symbol includes multiple first preamble symbols, the multiple first preamble symbols may or may not contain the same first preamble symbol.

[0062] Optionally, the ultra-wideband signal may further include a synchronization (SYNC) field. The SYNC field is used by the receiving end to determine target time-frequency synchronization information based on the initial time-frequency synchronization information. The target time-frequency synchronization information is used for high-precision synchronization of the ultra-wideband signal. There is a null signal interval between the SYNC field and the first CTS symbol of the CTS field. The length of the null signal interval can be customized, and the specific value is not limited in the embodiments of the present application.

[0063] In summary, the signal transmission method provided in the embodiment of the present application sends a narrowband signal to the receiving end, and the narrowband signal is used by the receiving end to determine the initial time-frequency synchronization information, and then sends an ultra-wideband signal to the receiving end, and the ultra-wideband signal includes a CTS field, and the CTS field includes at least one CTS symbol. The CTS symbol includes at least one first preamble symbol or is generated by spectrum spreading of at least one first preamble symbol. The CTS field is used by the receiving end to determine the channel impulse response, thereby achieving ranging. The initial time-frequency synchronization information is determined by the narrowband signal, and ranging is performed by the structure of the ultra-wideband signal provided in the embodiment of the present application, thereby achieving ranging by combining narrowband with ultra-wideband. In this process, the ultra-wideband system does not need to determine the initial time-frequency synchronization information, which reduces the air transmission time of the ultra-wideband signal and the complexity of the ultra-wideband system. Therefore, while maintaining high-precision ranging in the application of the ultra-wideband system, the chip area, operating power consumption and operating cost of the ultra-wideband system are reduced, thereby improving ranging efficiency.

[0064] Please refer to FIG2 , which is a flow chart of another signal transmission method provided in an embodiment of the present application. The method is applied to a receiving end in a signal transmission system, which includes an ultra-wideband system and a narrowband system. The method may include the following process:

[0065] 201. Determine initial time-frequency synchronization information based on a narrowband signal sent by a transmitting end.

[0066] The narrowband system at the receiving end receives the narrowband signal and determines initial time-frequency synchronization information based on the narrowband signal.

[0067] 202. Receive an ultra-wideband signal sent by a transmitter, where the ultra-wideband signal includes a CTS field, the CTS field includes at least one CTS symbol, and the CTS symbol includes at least one first preamble symbol or is generated by spectrum spreading of the at least one first preamble symbol.

[0068] 203. Perform synchronization processing on the ultra-wideband signal according to the initial time-frequency synchronization information.

[0069] When the UWB signal does not include a SYNC field, the receiving end directly synchronizes the CTS field of the UWB signal based on the initial time-frequency synchronization information. When the UWB signal also includes a SYNC field, the receiving end can determine the target time-frequency synchronization information based on the initial time-frequency synchronization information and the SYNC field, and then synchronize the CTS field of the UWB signal based on the target time-frequency synchronization information.

[0070] Due to the high bandwidth of ultra-wideband systems, devices must operate at high sampling rates, meaning they must operate at higher frequencies. Therefore, compared to narrowband systems, ultra-wideband systems have higher chip area, operating power consumption, and operating costs. In the embodiments of the present application, the initial time-frequency synchronization information is determined by the narrowband system at the receiving end, and the ultra-wideband system does not need to determine the initial time-frequency synchronization information. This effectively reduces the air transmission time of the ultra-wideband signal and the complexity of the ultra-wideband system, thereby reducing the chip area, operating power consumption, and operating costs of the ultra-wideband system and improving ranging efficiency.

[0071] 204. Determine a channel impulse response based on the CTS field.

[0072] The receiving end can determine the channel impulse response based on the CTS field to perform first-path monitoring and thus achieve ranging.

[0073] In summary, the signal transmission method provided by the embodiment of the present application is that the receiving end determines the initial time-frequency synchronization information based on the narrowband signal sent by the transmitting end, and then receives the ultra-wideband signal sent by the transmitting end, the ultra-wideband signal includes a CTS field, the CTS field includes at least one CTS symbol, the CTS symbol includes at least one first preamble symbol or is generated by spectrum spreading of at least one first preamble symbol, the receiving end synchronizes the ultra-wideband signal according to the initial time-frequency synchronization information, and then determines the channel impulse response based on the CTS field of the ultra-wideband signal, thereby achieving ranging. The initial time-frequency synchronization information is determined by the narrowband signal, and ranging is performed by the structure of the ultra-wideband signal provided by the embodiment of the present application, thereby achieving ranging by combining narrowband with ultra-wideband. In this process, the ultra-wideband system does not need to determine the initial time-frequency synchronization information, which reduces the air transmission time of the ultra-wideband signal and the complexity of the ultra-wideband system. Therefore, while maintaining high-precision ranging in the application of the ultra-wideband system, the chip area, operating power consumption and operating cost of the ultra-wideband system are reduced, thereby improving ranging efficiency.

[0074] Please refer to FIG3 , which is a flow chart of another signal transmission method provided in an embodiment of the present application. FIG3 takes an ultra-wideband signal including a CTS field and a SYNC field as an example for explanation. The method is applied to a signal transmission system, the signal transmission system including a transmitting end and a receiving end, both of which include an ultra-wideband system and a narrowband system. The method may include the following process:

[0075] 301. A transmitting end sends a narrowband signal to a receiving end.

[0076] In the embodiments of the present application, there is no limitation on the format (including length and fields, etc.), operating frequency band, and signal bandwidth of the narrowband signal.

[0077] 302. The receiving end determines initial time-frequency synchronization information based on the narrowband signal.

[0078] The initial time-frequency synchronization information may include a sampling clock offset (SCO) and / or a carrier frequency offset (CFO).

[0079] 303. The transmitting end sends an ultra-wideband signal to the receiving end. The ultra-wideband signal includes a CTS field and a SYNC field. The CTS field includes at least one CTS symbol. The CTS symbol includes at least one first preamble symbol or is generated by spreading the at least one first preamble symbol. The SYNC field includes at least one second preamble symbol.

[0080] The first preamble symbol may include a first preamble code or be generated by spreading the first preamble code. The first preamble code is a sequence with good correlation characteristics, for example, it may be a binary sequence or a ternary sequence. The embodiment of the present application does not limit the first preamble code. The sequence with good correlation characteristics is not easily interfered with by external signals, and can maintain the high precision of the channel impulse response when the subsequent receiving end determines the channel impulse response based on the CTS field, thereby maintaining the high precision ranging of the ultra-wideband system. And when the first preamble symbol is generated by spreading the first preamble code, the first preamble symbol can be not easily interfered with by external signals and is unpredictable, thereby improving the anti-interference ability and security of the ultra-wideband signal.

[0081] When the first preamble symbol is generated by the spread spectrum of the first preamble code, the first preamble code can be multiplied by the spread spectrum code to obtain the first preamble symbol. The length of the spread spectrum code is related to the length of the first preamble symbol. In an embodiment of the present application, the number of bits of the spread spectrum code is the same as the number of bits of the first preamble code, and each value of the spread spectrum code corresponds one-to-one to each value of the first preamble code. Each value in the first preamble code is multiplied by the corresponding value in the spread spectrum code. The spread spectrum code is a sequence with good correlation characteristics, for example, it can be a binary sequence or a ternary sequence. The spread spectrum code can be randomly generated by the transmitter; or it can be selected from a plurality of pre-stored spread spectrum codes. For example, the transmitter pre-generates a codebook including a plurality of spread spectrum codes, and the transmitter directly selects the spread spectrum code from the codebook. The form, length, and acquisition method of the spread spectrum code can all be customized, and the embodiment of the present application does not limit this.

[0082] When the CTS symbol is generated by spreading at least one first preamble symbol, the number of bits of the spreading code is the same as the number of first preamble symbols in the CTS field, and each first preamble symbol corresponds to a value in the spreading code. The at least one first preamble symbol can be multiplied by the corresponding value in the spreading code to obtain the CTS symbol. The spreading code and the spreading method of at least one first preamble symbol can refer to the spreading of the first preamble code described above, and the embodiments of the present application will not be described in detail here. The CTS symbol obtained by the spreading method is unpredictable, which improves the anti-interference capability and security of the ultra-wideband signal.

[0083] When the number of CTS symbols is multiple, multiple CTS symbols can form multiple CTS segments (segments, Seg), there is an empty signal interval between any two CTS segments, and there is no signal transmission in the time period corresponding to the empty signal interval. The time length of the empty signal interval can be customized, and the embodiment of the present application does not limit its specific value. When the number of CTS segments is greater than 2, the number of empty signal intervals is multiple, and there may be empty signal intervals of the same time length in the multiple empty signal intervals, or there may not be empty signal intervals of the same time length. In this way, when sending an ultra-wideband signal in a pulse signal, the duty cycle of the pulse signal can be reduced, while meeting the frequency band usage regulations of the ultra-wideband, the transmission power of the ultra-wideband signal is increased, and the attenuation of the ultra-wideband signal during transmission is reduced, thereby expanding the coverage range of the ultra-wideband signal.

[0084] The length of the CTS field is determined by the length and number of CTS symbols and the time length of the empty signal interval. The number of CTS symbols, the length of each CTS symbol, and the time length of the empty signal interval can all be customized. The embodiments of the present application do not limit their specific values.

[0085] The length of the SYNC field is determined by the number of second preamble symbols and the length of each second preamble symbol. The number of second preamble symbols and the length of each second preamble symbol can be customized, and the embodiments of the present application do not limit their specific values. The SYNC field and the CTS field may or may not contain the same preamble symbol. When there are multiple second preamble symbols, the multiple second preamble symbols may or may not contain the same second preamble symbol.

[0086] The second preamble symbol may include a second preamble code or be generated by spreading the second preamble code. The second preamble code may be a sequence with good correlation characteristics, such as a binary sequence or a ternary sequence. The embodiment of the present application does not limit the form of the second preamble code. The spreading method of the second preamble symbol may refer to the first preamble code, and the embodiment of the present application will not be described in detail here.

[0087] The length of the entire UWB signal is determined by the length of the SYNC field, the duration of the null interval between the SYNC field and the CTS field, and the length of the CTS field. The UWB signal is used for subsequent ranging, and its length is related to the coverage range and ranging frequency of the subsequent ranging. The length of the SYNC field and the duration of the null interval between the SYNC field and the CTS field can be customized, allowing the UWB signal to support the requirements for ranging coverage and ranging frequency in different ranging scenarios. For example, when the ranging coverage needs to be increased, the length of the UWB signal can be increased.

[0088] For example, please refer to Figure 4, which is a schematic diagram of the format of a narrowband signal and an ultra-wideband signal provided in an embodiment of the present application. Figure 4 takes the CTS field including M CTS segments CTS Seg1 to CTS SegM as an example for explanation. Figure 4 shows the time length of the narrowband signal and the ultra-wideband signal during the transmission process. As shown in Figure 4, T sync Indicates the duration of the SYNC field in the UWB signal, in T sync The SYNC field is transmitted during the time period of T CTS SegX Indicates the duration of CTS SegX, in T CTS SegX CTS SegX is transmitted within the time period, 1≤X≤M.

[0089] T interval Indicates the duration of the null signal interval between the narrowband signal and the ultra-wideband signal (or SYNC field). gap0 Indicates the length of the null signal interval between the SYNC field and the first CTS symbol (or CTS Seg1) of the CTS field. There is a null signal interval between every two CTS segments in the CTS field. There are M-1 null signal intervals in the CTS field. T gapY Indicates the length of the empty signal interval between CTS SegY and CTS SegY+1, 1≤Y≤M-1. interval 、T gap0 and T gapY No signal is sent during the time period.

[0090] The following uses Figures 5 to 7 as examples to illustrate the specific structure of the fields in the ultra-wideband signal. Please refer to Figure 5, which is a schematic diagram of the structure of a SYNC field provided in an embodiment of the present application. As shown in Figure 5, the SYNC field includes N SYNC The second leading symbols symbol(0)~symbol(N SYNC -1), N SYNC is a positive integer greater than 2.

[0091] Please refer to FIG6, which is a schematic diagram of the structure of a CTS field provided in an embodiment of the present application. As shown in FIG6, the CTS field includes N CTS CTS symbols CTS(0)~CTS(N CTS -1), N CTS is a positive integer greater than 2. N CTS CTS symbols make up M Seg CTS segments CTS Seg(0)~CTS Seg(M Seg -1), each CTS segment includes N Seg CTS symbols, M Segis a positive integer greater than 3, N Seg is a positive integer. For example, CTS Seg(0) includes N Seg CTS symbols CTS(0)~CTS(N Seg -1), CTS Seg(1) includes N Seg CTS symbol CTS(N Seg )~CTS(2*N Seg -1), CTS Seg(M Seg -1) Including N Seg CTS symbol CTS((M Seg -1)*N Seg )~CTS(N CTS -1). There is an empty signal interval between any two CTS segments, for example, there is a gap (1) between CTS Seg (0) and CTS Seg (1), a gap (2) between CTS Seg (1) and CTS Seg (2), and a gap (3) between CTS Seg (M Seg -2) and CTS Seg(M Seg -1) there is a Gap(M Seg -1).

[0092] Please refer to Figure 7, which is a schematic diagram of the structure of a CTS segment provided by an embodiment of the present application. Figure 7 takes CTS Seg (0) in Figure 6 as an example, and takes the example of the CTS symbol in CTS Seg (0) being generated by a first preamble symbol spread spectrum. As shown in Figure 7, CTS Seg (0) includes N Seg CTS symbols CTS(0)~CTS(N Seg -1), the N Seg The CTS symbols are the first N Seg Figure 7 shows N Seg The specific structure of CTS(i) in the CTS symbols, CTS(i) is obtained by spreading the first leading symbol with a pseudo-random sequence, and each value P(0)~P(N-1) in the first leading symbol is multiplied by the i-th value Sp(i) in the spreading code to obtain CTS(i).

[0093] It should be noted that in the embodiment of the present application, the spreading code used to spread the first preamble code, the spreading code used to spread the second preamble code, and the spreading code used to spread the first preamble symbol may be the same or different, and the embodiment of the present application does not limit this.

[0094] 304. The receiving end determines target time-frequency synchronization information according to the initial time-frequency synchronization information and the SYNC field.

[0095] 305. The receiving end performs synchronization processing on the ultra-wideband signal according to the target time-frequency synchronization information.

[0096] The receiving end synchronizes the CTS field of the ultra-wideband signal based on the target time-frequency synchronization information. The receiving end can further achieve high-precision synchronization of the CTS field based on the SYNC field. When the ultra-wideband system determines the channel impulse response based on the CTS field, the accuracy of the channel impulse response is closely related to the synchronization accuracy of the CTS field. However, due to the limitations of its own bandwidth and clock frequency, the synchronization accuracy of the narrowband system is relatively low. The receiving end can further achieve high-precision synchronization of the CTS field based on the SYNC field, thereby ensuring the accuracy of the subsequently determined channel impulse response, thereby ensuring good ranging performance when using the channel impulse response for ranging. In addition, the synchronization accuracy of different narrowband systems is different. The ultra-wideband system achieves further synchronization based on the synchronization of the narrowband system based on the SYNC field, so that the ultra-wideband system can flexibly adapt to the synchronization accuracy of different narrowband systems, thereby improving the feasibility and wide application of the method of the embodiment of the present application.

[0097] 306. The receiving end determines a channel impulse response based on the CTS field.

[0098] In summary, the signal transmission method provided by the embodiment of the present application is that the receiving end determines the initial time-frequency synchronization information based on the narrowband signal sent by the transmitting end, and then the transmitting end sends an ultra-wideband signal to the receiving end. The ultra-wideband signal includes a CTS field and a SYNC field. The CTS field includes at least one CTS symbol. The CTS symbol includes at least one first preamble symbol or is generated by spreading the at least one first preamble symbol. The SYNC field includes at least one second preamble symbol. The receiving end determines the target time-frequency synchronization information based on the initial time-frequency synchronization information and the SYNC field, and synchronizes the ultra-wideband signal according to the target time-frequency synchronization information. Then, the channel impulse response is determined based on the CTS field of the ultra-wideband signal, thereby achieving ranging. The initial time-frequency synchronization information is determined by the narrowband signal, and high-precision synchronization and ranging are performed using the structure of the ultra-wideband signal provided by the embodiment of the present application, thereby achieving ranging by combining narrowband with ultra-wideband. In this process, the ultra-wideband system does not need to determine the initial time-frequency synchronization information, reducing the air transmission time of the ultra-wideband signal and the complexity of the ultra-wideband system. Thus, while maintaining high-precision ranging in the ultra-wideband system, the chip area, operating power consumption, and operating cost of the ultra-wideband system are reduced, thereby improving ranging efficiency.

[0099] Furthermore, the receiving end can further achieve high-precision synchronization of the CTS field of the ultra-wideband signal based on the SYNC field. Since the accuracy of the channel impulse response is closely related to the synchronization accuracy of the CTS field, high-precision synchronization can be achieved through the SYNC field to improve the accuracy of the channel impulse response, thereby ensuring good ranging performance when using the channel impulse response for ranging. Furthermore, different narrowband systems have different synchronization accuracies. Based on the synchronization of the narrowband system, the ultra-wideband system achieves further synchronization based on the SYNC field, allowing the ultra-wideband system to flexibly adapt to the synchronization accuracy of different narrowband systems, thereby improving the feasibility and wide application of the method of the embodiment of the present application.

[0100] In addition, the length of the entire UWB signal is determined by the length of the SYNC field, the duration of the null interval between the SYNC field and the CTS field, and the length of the CTS field. The length of the UWB signal is related to the ranging coverage and ranging frequency. The length of the SYNC field and the duration of the null interval between the SYNC field and the CTS field can be customized, allowing the UWB signal to support the ranging coverage and ranging frequency requirements in different ranging scenarios.

[0101] The order of the methods provided in the embodiments of the present application can be adjusted appropriately, and the process can be increased or decreased accordingly. Any method that can be easily thought of by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application, and the embodiments of the present application do not limit this.

[0102] The above mainly introduces the signal transmission method provided by the embodiment of the present application from the perspective of interaction between devices. It is understandable that, in order to implement the above functions, each device includes a hardware structure and / or software module corresponding to the execution of each function. Those skilled in the art should easily appreciate that, in combination with the algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in a hardware or computer software driven hardware manner depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0103] The embodiments of the present application can divide the functional modules of each device according to the above method examples. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiments of the present application is schematic and is only a logical function division. In actual implementation, there may be other division methods.

[0104] FIG8 is a block diagram of a signal transmission device provided in an embodiment of the present application. For example, the signal transmission device may be a transmitter, or a chip therein, or other combined device or component having the functions of the above-mentioned signal transmission device. In the case of dividing each functional module according to its function, the signal transmission device 400 includes:

[0105] A first sending module 401 is configured to send a narrowband signal to a receiving end, where the narrowband signal is used by the receiving end to determine initial time-frequency synchronization information;

[0106] A second sending module 402 is configured to send an ultra-wideband signal to the receiving end, where the ultra-wideband signal includes a channel impulse response training sequence CTS field, and the CTS field is used by the receiving end to determine a channel impulse response;

[0107] The CTS field includes at least one CTS symbol, and the CTS symbol includes at least one first preamble symbol or is generated by spreading at least one first preamble symbol.

[0108] In combination with the above solution, the ultra-wideband signal also includes a synchronization SYNC field; the SYNC field is used by the receiving end to determine target time-frequency synchronization information based on the initial time-frequency synchronization information, and the SYNC field includes at least one second preamble symbol.

[0109] In combination with the above solution, the number of the CTS symbols is multiple, multiple CTS symbols constitute multiple CTS segments, and there is an empty signal interval between any two CTS segments.

[0110] In combination with the above solution, the first preamble symbol includes a first preamble code or is generated by spreading the first preamble code, and the second preamble symbol includes a second preamble code or is generated by spreading the second preamble code.

[0111] FIG9 is a block diagram of another signal transmission device provided in an embodiment of the present application. For example, the signal transmission device may be a receiving end, or a chip therein, or other combined device or component having the functions of the above-mentioned signal transmission device. In the case of dividing each functional module according to each function, the signal transmission device 500 includes:

[0112] A first determining module 501 is configured to determine initial time-frequency synchronization information based on a narrowband signal sent by a transmitting end;

[0113] A receiving module 502 is configured to receive an ultra-wideband signal sent by the transmitting end, where the ultra-wideband signal includes a channel impulse response training sequence (CTS) field, the CTS field includes at least one CTS symbol, and the CTS symbol includes at least one first preamble symbol or is generated by spectrum spreading of at least one first preamble symbol;

[0114] A synchronization module 503 is configured to perform synchronization processing on the ultra-wideband signal according to the initial time-frequency synchronization information;

[0115] The second determining module 504 is configured to determine a channel impulse response based on the CTS field.

[0116] In combination with the above scheme, the ultra-wideband signal also includes a synchronization SYNC field, the SYNC field includes at least one second leading symbol, and the synchronization module 503 is specifically used to: determine the target time-frequency synchronization information based on the initial time-frequency synchronization information and the SYNC field; and synchronize the ultra-wideband signal according to the target time-frequency synchronization information.

[0117] In combination with the above solution, the number of the CTS symbols is multiple, multiple CTS symbols constitute multiple CTS segments, and there is an empty signal interval between any two CTS segments.

[0118] In combination with the above solution, the first preamble symbol includes a first preamble code or is generated by spreading the first preamble code, and the second preamble symbol includes a second preamble code or is generated by spreading the second preamble code.

[0119] Figure 10 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. The electronic device 600 can be a transmitting end or a receiving end, or a chip or functional module in the transmitting end or the receiving end. As shown in Figure 10, the electronic device 600 includes a processor 601, a transceiver 602, and a communication circuit 603.

[0120] The processor 601 is used to execute any step in the method embodiments shown in Figures 1 to 3, and when executing processes such as sending a narrowband signal to a receiving end, it can optionally call the transceiver 602 and the communication line 603 to complete the corresponding operation.

[0121] Furthermore, the electronic device 600 may further include a memory 604 , wherein the processor 601 , the memory 604 and the transceiver 602 may be connected via a communication line 603 .

[0122] The processor 601 is a processor, a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The processor 601 may also be other devices with processing functions, such as circuits, devices, or software modules, without limitation.

[0123] The transceiver 602 is used to communicate with other devices or other communication networks, such as Ethernet, radio access networks (RAN), wireless local area networks (WLAN), etc. The transceiver 602 can be a module, a circuit, a transceiver, or any device capable of implementing communication.

[0124] The transceiver 602 is mainly used for transmitting and receiving data, and may include a transmitter and a receiver for transmitting and receiving signals respectively; operations other than signal transmission and reception are implemented by the processor, such as information processing, calculation, etc.

[0125] The communication line 603 is used to transmit information between the components included in the electronic device 600.

[0126] In one design, the processor can be considered as the logic circuit and the transceiver as the interface circuit.

[0127] The memory 604 is used to store instructions, where the instructions may be computer programs.

[0128] The memory 604 may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. The non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM may be used, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct RAM bus RAM (DR RAM). Memory 604 may also be a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, etc. It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0129] It should be noted that the memory 604 can exist independently of the processor 601 or can be integrated with the processor 601. The memory 604 can be used to store instructions, program code, or some data. The memory 604 can be located within the electronic device 600 or outside the electronic device 600, without limitation. The processor 601 is configured to execute the instructions stored in the memory 604 to implement the methods provided in the above embodiments of the present application.

[0130] In one example, processor 601 may include one or more processors, such as processor 0 and processor 1 in FIG. 10 .

[0131] As an optional implementation, the electronic device 600 includes multiple processors. For example, in addition to the processor 601 in FIG. 10 , it may also include a processor 607 .

[0132] As an optional implementation, the electronic device 600 further includes an output device 605 and an input device 606. For example, the input device 606 is a keyboard, a mouse, a microphone, or a joystick, and the output device 605 is a display screen, a speaker, or the like.

[0133] It should be pointed out that the electronic device 600 can be a chip system or a device with a similar structure as shown in Figure 10. Among them, the chip system can be composed of chips, or it can include chips and other discrete devices. The actions, terms, etc. involved in the various embodiments of this application can refer to each other without limitation. The message names or parameter names in the messages exchanged between the various devices in the embodiments of this application are only an example. Other names can also be used in the specific implementation without limitation. In addition, the component structure shown in Figure 10 does not constitute a limitation on the electronic device 600. In addition to the components shown in Figure 10, the electronic device 600 may include more or fewer components than those shown in Figure 10, or combine certain components, or arrange the components differently.

[0134] The processor and transceiver described in this application can be implemented on an integrated circuit (IC), an analog IC, a radio frequency integrated circuit, a mixed-signal IC, an application specific integrated circuit (ASIC), a printed circuit board (PCB), an electronic device, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), N-type metal oxide semiconductor (NMOS), P-type metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0135] Figure 11 is a schematic diagram of the structure of a signal transmission device provided in an embodiment of the present application. The signal transmission device can be applied to the scenarios shown in the above method embodiments. For ease of explanation, Figure 11 only shows the main components of the signal transmission device, including a processor, a memory, a control circuit, and an input / output device. The processor is mainly used to process communication protocols and communication data, execute software programs, and process data of software programs. The memory is mainly used to store software programs and data. The control circuit is mainly used for power supply and transmission of various electrical signals. The input / output device is mainly used to receive data input by the user and output data to the user.

[0136] When the signal transmission device is a transmitter or receiver, the control circuit may be a motherboard, the memory may include a hard disk, RAM, ROM, or other media with storage functions, the processor may include a baseband processor and a central processing unit, the baseband processor is mainly used to process the communication protocol and communication data, the central processing unit is mainly used to control the entire signal transmission device, execute software programs, and process software program data, the input and output devices may include a display screen, a keyboard, and a mouse, etc.; the control circuit may further include or be connected to a transceiver circuit or transceiver, such as a network cable interface, etc., for sending or receiving data or signals, such as for data transmission and communication with other devices. Furthermore, it may also include an antenna for sending and receiving wireless signals, for data / signal transmission with other devices.

[0137] According to the method provided in the embodiments of the present application, the present application also provides a computer program product, which includes computer program code. When the computer program code runs on a computer, it enables the computer to execute any of the methods described in the embodiments of the present application.

[0138] The present application also provides a computer-readable storage medium. All or part of the processes in the above-mentioned method embodiments can be completed by a computer or a device with information processing capabilities executing a computer program or instruction to control the relevant hardware. The computer program or the group of instructions can be stored in the above-mentioned computer-readable storage medium. When executed, the computer program or the group of instructions may include the processes of the above-mentioned method embodiments. The computer-readable storage medium can be an internal storage unit of the server of any of the above-mentioned embodiments, such as a hard disk or memory of the server. The above-mentioned computer-readable storage medium can also be an external storage device of the above-mentioned server, such as a plug-in hard disk equipped on the above-mentioned server, a smart memory card (smart media card, SMC), a secure digital (secure digital, SD) card, a flash card (flash card), etc. Further, the above-mentioned computer-readable storage medium can also include both the internal storage unit of the above-mentioned server and an external storage device. The above-mentioned computer-readable storage medium is used to store the above-mentioned computer program or instruction and other programs and data required by the above-mentioned server. The above-mentioned computer-readable storage medium can also be used to temporarily store data that has been output or is to be output.

[0139] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0140] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described systems, devices and units can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0141] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0142] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0143] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0144] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

[0145] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A signal transmission method, characterized in that: The method comprises: Sending a narrowband signal to a receiving end, wherein the narrowband signal is used by the receiving end to determine initial time-frequency synchronization information; Sending an ultra-wideband signal to the receiving end, wherein the ultra-wideband signal includes a channel impulse response training sequence CTS field, and the CTS field is used by the receiving end to determine a channel impulse response; The CTS field includes at least one CTS symbol, and the CTS symbol includes at least one first preamble symbol or is generated by spreading at least one first preamble symbol.

2. The method according to claim 1, characterized in that The ultra-wideband signal also includes a synchronization SYNC field; The SYNC field is used by the receiving end to determine target time-frequency synchronization information based on the initial time-frequency synchronization information, and the SYNC field includes at least one second preamble symbol.

3. The method according to claim 2, characterized in that The first preamble symbol includes a first preamble code or is generated by spectrum spreading the first preamble code, and the second preamble symbol includes a second preamble code or is generated by spectrum spreading the second preamble code.

4. The method according to any one of claims 1 to 3, characterized in that There are multiple CTS symbols, and multiple CTS symbols form multiple CTS segments. There is an empty signal interval between any two CTS segments.

5. A signal transmission method, characterized in that: The method comprises: determining initial time-frequency synchronization information based on a narrowband signal sent by a transmitting end; Receiving an ultra-wideband signal sent by the transmitting end, the ultra-wideband signal includes a channel impulse response training sequence CTS field, the CTS field includes at least one CTS symbol, and the CTS symbol includes at least one first preamble symbol or is generated by spectrum spreading of at least one first preamble symbol; Performing synchronization processing on the ultra-wideband signal according to the initial time-frequency synchronization information; A channel impulse response is determined based on the CTS field.

6. The method according to claim 5, characterized in that The ultra-wideband signal further includes a synchronization SYNC field, the SYNC field includes at least one second preamble symbol, and the synchronization processing of the ultra-wideband signal according to the initial time-frequency synchronization information includes: Determining target time-frequency synchronization information based on the initial time-frequency synchronization information and the SYNC field; The ultra-wideband signal is synchronously processed according to the target time-frequency synchronization information.

7. The method according to claim 6, characterized in that The first preamble symbol includes a first preamble code or is generated by spectrum spreading the first preamble code, and the second preamble symbol includes a second preamble code or is generated by spectrum spreading the second preamble code.

8. The method according to any one of claims 5 to 7, characterized in that There are multiple CTS symbols, and multiple CTS symbols form multiple CTS segments. There is an empty signal interval between any two CTS segments.

9. A signal transmission device, characterized in that: The device comprises: A first sending module, configured to send a narrowband signal to a receiving end, wherein the narrowband signal is used by the receiving end to determine initial time-frequency synchronization information; A second sending module is configured to send an ultra-wideband signal to the receiving end, wherein the ultra-wideband signal includes a channel impulse response training sequence CTS field, and the CTS field is used by the receiving end to determine a channel impulse response; The CTS field includes at least one CTS symbol, and the CTS symbol includes at least one first preamble symbol or is generated by spreading at least one first preamble symbol.

10. A signal transmission device, characterized in that: The device comprises: A first determining module, configured to determine initial time-frequency synchronization information based on a narrowband signal sent by a transmitting end; a receiving module, configured to receive an ultra-wideband signal sent by the transmitting end, wherein the ultra-wideband signal includes a channel impulse response training sequence CTS field, the CTS field includes at least one CTS symbol, and the CTS symbol includes at least one first preamble symbol or is generated by spectrum spreading of at least one first preamble symbol; a synchronization module, configured to perform synchronization processing on the ultra-wideband signal according to the initial time-frequency synchronization information; The second determining module is configured to determine a channel impulse response based on the CTS field.

11. A signal transmission device, characterized in that: The device comprises: one or more processors; a memory for storing one or more computer programs or instructions; When the one or more computer programs or instructions are executed by the one or more processors, the one or more processors are caused to implement the method according to any one of claims 1 to 4.

12. A signal transmission device, characterized in that: The device comprises: one or more processors; a memory for storing one or more computer programs or instructions; When the one or more computer programs or instructions are executed by the one or more processors, the one or more processors implement the method according to any one of claims 5 to 8.

13. A signal transmission system, characterized in that: The system includes: a transmitting end and a receiving end; The transmitting end includes the signal transmission device according to claim 9 or the signal transmission device according to claim 11, and the receiving end includes the signal transmission device according to claim 10 or the signal transmission device according to claim 12.

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