Signal transmission method and device

Abstract

Provided are a signal transmission method and device, the method comprising: receiving first information, the first information being used for indicating a first index corresponding to a first signal, the first index being used for indicating a first parameter group in a first association relationship, the first association relationship comprising a plurality of indexes and a plurality of parameter groups corresponding to the plurality of indexes, the first parameter set is a parameter set associated with the first index, the parameter set comprises a symbol rate, a first parameter and a cyclic prefix length, the first parameter is a parameter of a filter used for transmitting the first signal, and the cyclic prefix length is the length of a cyclic prefix contained in each symbol in the first signal; and the first signal is transmitted according to the first parameter group, so that interference of different degrees on the signal caused by the waveform of the filter is relieved, and the performance stability of the receiver is improved.

Description

Technical Field

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

[0002] Waveforms in communication systems are divided into single-carrier waveforms and multi-carrier waveforms. A typical multi-carrier waveform is the orthogonal frequency division multiplexing (OFDM) waveform. However, the OFDM waveform has a high peak-to-average power ratio (PAPR) problem, which may cause the orthogonality between each sub-channel to be destroyed, causing interference and deteriorating system performance. Therefore, the discrete Fourier transform spread OFDM (DFT-s-OFDM) waveform has been proposed to reduce PAPR and improve coverage. As the frequency band and bandwidth of the communication system increase, the signal processing complexity of the DFT-s-OFDM waveform increases. In comparison, single-carrier waveforms (such as single-carrier quadrature amplitude modulation (SC-QAM) waveform or single-carrier frequency domain equalization (SC-FDE)) have lower PAPR and do not involve time-frequency transformation at the transmitting end, which has the advantage of low complexity. Currently, in a scenario where a multi-carrier waveform and a single-carrier waveform coexist, the receiving end supports using a unified receiver to process the multi-carrier waveform signal or the single-carrier waveform signal.

[0003] However, when a unified receiver is used to process a signal having a single carrier waveform formed by a time-domain convolution filter, different time-domain filters may cause different degrees of interference to the signal, resulting in unstable receiver performance. Summary of the Invention

[0004] The present application provides a method and apparatus for signal transmission. In a scenario where multi-carrier waveforms and single-carrier waveforms coexist, by configuring specific cyclic prefix lengths for different filters, the interference of different degrees caused by the filter waveforms to the signal can be alleviated, thereby improving the stability of the receiver performance.

[0005] In a first aspect, a method for signal transmission is provided, the method comprising: receiving first information, the first information being used to indicate a first index corresponding to a first signal, the first index being used to indicate a first parameter group in a first association relationship, the first association relationship comprising multiple indexes and multiple parameter groups corresponding to the multiple indexes respectively, the first parameter group being a parameter group associated with the first index, the parameter group comprising a symbol rate, a first parameter and a cyclic prefix length, wherein the first parameter is a parameter of a filter used to transmit the first signal, and the cyclic prefix length is the length of a cyclic prefix contained in each symbol in the first signal; and transmitting the first signal according to the first parameter group.

[0006] The method described in the first aspect can be executed by a terminal device. Unless otherwise specified, in this application, the terminal device can be the terminal device itself, a component in the terminal device (for example, a processor, a chip, or a chip system), or a logic module or software that implements all or part of the terminal device functions. This application does not specifically limit this.

[0007] It can be understood that the first signal is carried in a single carrier for transmission, or in other words, the first signal is transmitted between the terminal device and the network device using a single carrier waveform.

[0008] It can be understood that the above-mentioned first association relationship supports signal transmission in a scenario where single-carrier waveform and multi-carrier waveform coexist, and after receiving the first information and determining the first parameter group, the terminal device can process and transmit the first signal according to the single-carrier processing process.

[0009] It can be understood that the embodiment of the present application does not limit the uplink transmission or downlink transmission between the terminal device and the network device.

[0010] As an example and not a limitation, when the terminal device performs uplink transmission with the network device, the terminal device transmitting the first signal according to the first parameter group can be understood as the terminal device sending the first signal according to the first parameter group.

[0011] As an example and not a limitation, when the terminal device performs downlink transmission with the network device, the terminal device transmitting the first signal according to the first parameter group can be understood as the terminal device processing the received first signal according to the first parameter group.

[0012] It can be understood that the embodiment of the present application does not limit the specific expression of the first association relationship. For example, the first association relationship can be expressed in the form of a table.

[0013] It can be understood that the length of the cyclic prefix included in each symbol in the first signal can be understood as the number of cyclic prefixes included in each symbol in the first signal.

[0014] Based on the above scheme, the terminal device can determine the first parameter group according to the first index and the first association relationship indicated by the first information, and the first parameter group includes the symbol rate, the filter parameters and the cyclic prefix length contained in each symbol, thereby alleviating the interference of the filter waveform to the signal to varying degrees and improving the stability of the receiver performance by configuring the corresponding cyclic prefix length for the filter using a combination of different symbol rates and filter parameters.

[0015] In combination with the first aspect, in certain implementations of the first aspect, the modulation mode corresponding to at least one parameter group among the multiple parameter groups is orthogonal amplitude modulation or offset orthogonal amplitude modulation, and the first parameter includes at least one of the roll-off factor of the filter or the length of the filter.

[0016] It can be understood that the embodiment of the present application does not limit the specific form of the modulation method corresponding to the at least one parameter group indicated by the first association relationship.

[0017] In one possible implementation, the first association relationship may indicate the modulation mode of a single carrier by carrying the number of signals in a single symbol in each parameter group. For example, when the number of signals in a single symbol carried in the parameter group is 256, it indicates that the modulation mode of the single carrier is QAM; and when the number of signals in a single symbol carried in the parameter group is 512, it indicates that the modulation mode of the single carrier is OQAM.

[0018] In another possible implementation, the first association relationship may set a separate bit in each index to indicate the modulation mode of a single carrier. Exemplarily, each index of the first association relationship may include a first bit and a second bit, the first bit and the second bit being used to jointly indicate the symbol rate, the first parameter, and the cyclic prefix length, and the second bit may also be used to indicate the modulation mode of a single carrier.

[0019] As an example and not a limitation, the first index may be "0+A," where the first bit "0" indicates the sampling frequency and / or symbol rate in the first association, and the second bit "A" indicates that the modulation scheme of the single carrier is "QAM." It will be readily understood that the same symbol rate may correspond to different single-carrier modulation schemes.

[0020] It can be understood that the present application does not limit the specific forms of the first bit and the second bit. For example, the first bit may include 4 bits, and the second bit may include the first bit.

[0021] In another possible implementation, the network device may carry an identifier for indicating the modulation mode of the first signal in the first information, so that the terminal device can determine the modulation mode of the first signal based on the identifier and determine the corresponding first parameter group in the first association relationship based on the first index. Exemplarily, the identifier may indicate that the modulation mode is QAM through bit "0" and indicate that the modulation mode of the single carrier waveform is "OQAM" through bit "1."

[0022] It can be understood that in the embodiment of the present application, the roll-off factor is defined as the ratio of the repeated signal to the valid signal in a single symbol.

[0023] Based on the above solution, the network device can indicate the modulation mode and the first parameter group of the first signal through the first index, so that the terminal device can correctly transmit the first signal according to the first parameter group, thereby improving the efficiency of signal transmission.

[0024] In combination with the first aspect, in certain implementations of the first aspect, the first parameter in at least one parameter group among the multiple parameter groups includes the length of the filter, and the longer the length of the filter, the larger the cyclic prefix length.

[0025] In combination with the first aspect, in certain implementations of the first aspect, the modulation mode corresponding to at least one parameter group among the multiple parameter groups is orthogonal amplitude modulation, the first parameter in the at least one parameter group includes a roll-off factor of the filter, and the at least one parameter group satisfies at least one of the following items: the symbol rate is 983.04 MHz and the roll-off factor is 3, and the cyclic prefix length is 18, or the symbol rate is 983.04 MHz and the roll-off factor is 2, and the cyclic prefix length is 18, or the symbol rate is 983.04 MHz and the roll-off factor is 1, and the cyclic prefix length is 18, or the symbol rate is 983.04 MHz and the roll-off factor is 0.5, and the cyclic prefix length is 20, or the symbol rate is 1310.7 MHz and the roll-off factor is 2, and the cyclic prefix length is 24, or the symbol rate is 1310.7 MHz and the roll-off factor is 1.25, and the cyclic prefix length is 24, or , the symbol rate is 1310.7 MHz and the roll-off factor is 0.5, and the cyclic prefix length is 26, or, the symbol rate is 1966.08 MHz and the roll-off factor is 1, and the cyclic prefix length is 35, or, the symbol rate is 1966.08 MHz and the roll-off factor is 0.5, and the cyclic prefix length is 36, or, the symbol rate is 1966.08 MHz and the roll-off factor is 0.25, and the cyclic prefix length is 39, or, The symbol rate is 2621.4 MHz and the roll-off factor is 0.5, and the cyclic prefix length is 49; alternatively, the symbol rate is 2621.4 MHz and the roll-off factor is 0.125, and the cyclic prefix length is 53; alternatively, the symbol rate is 2949.12 MHz and the roll-off factor is 0.33, and the cyclic prefix length is 54; alternatively, the symbol rate is 2949.12 MHz and the roll-off factor is 0.125, and the cyclic prefix length is 58.

[0026] In combination with the first aspect, in certain implementations of the first aspect, the modulation mode corresponding to at least one parameter group among the multiple parameter groups is orthogonal amplitude modulation, the first parameter in the at least one parameter group includes the length of the filter, and the at least one parameter group satisfies at least one of the following: the symbol rate is 983.04 MHz and the filter length is 1.5, and the cyclic prefix length is 18, or the symbol rate is 983.04 MHz and the filter length is 3.5, and the cyclic prefix length is 20, or the symbol rate is 1310.7 MHz and the filter length is 1.5, and the cyclic prefix length is 24, or the symbol rate is 1310.7 MHz and the filter length is 3.5, and the cyclic prefix length is 26, or the symbol rate is 1966.08 MHz. And the filter length is 1.5, the cyclic prefix length is 35, or, the symbol rate is 1966.08 MHz and the filter length is 3.5, the cyclic prefix length is 36, or, the symbol rate is 1966.08 MHz and the filter length is 5.5, the cyclic prefix length is 39, or, the symbol rate is 2621.4 MHz and the filter length is 4.5, the cyclic prefix length is 49, or, the symbol rate is 2621.4 MHz and the filter length is 8.5, the cyclic prefix length is 53, or, the symbol rate is 2949.12 MHz and the filter length is 4.5, the cyclic prefix length is 54, or, the symbol rate is 2949.12 MHz and the filter length is 8.5, the cyclic prefix length is 58.

[0027] In combination with the first aspect, in certain implementations of the first aspect, the modulation mode corresponding to at least one parameter group among the multiple parameter groups is offset quadrature amplitude modulation, the first parameter in the at least one parameter group includes a roll-off factor of the filter, and the at least one parameter group satisfies at least one of the following items: the symbol rate is 983.04 MHz and the roll-off factor is 3, and the cyclic prefix length is 36, or the symbol rate is 983.04 MHz and the roll-off factor is 2, and the cyclic prefix length is 36, or the symbol rate is 983.04 MHz and the roll-off factor is 1, and the cyclic prefix length is 36, or the symbol rate is 983.04 MHz and the roll-off factor is 0.5, and the cyclic prefix length is 40, or the symbol rate is 1310.7 MHz and the roll-off factor is 2, and the cyclic prefix length is 48, or the symbol rate is 1310.7 MHz and the roll-off factor is 1.25, and the cyclic prefix length is 48, or The symbol rate is 1310.7 MHz and the roll-off factor is 0.5, and the cyclic prefix length is 52, or the symbol rate is 1966.08 MHz and the roll-off factor is 1, and the cyclic prefix length is 70, or the symbol rate is 1966.08 MHz and the roll-off factor is 0.5, and the cyclic prefix length is 72, or the symbol rate is 1966.08 MHz and the roll-off factor is 0.25, and the cyclic prefix length is 78, or the symbol The symbol rate is 2621.4 MHz and the roll-off factor is 0.5, and the cyclic prefix length is 98; or, the symbol rate is 2621.4 MHz and the roll-off factor is 0.125, and the cyclic prefix length is 106; or, the symbol rate is 2949.12 MHz and the roll-off factor is 0.33, and the cyclic prefix length is 108; or, the symbol rate is 2949.12 MHz and the roll-off factor is 0.125, and the cyclic prefix length is 116.

[0028] In combination with the first aspect, in certain implementations of the first aspect, the modulation mode corresponding to at least one parameter group in the multiple parameter groups is offset quadrature amplitude modulation, the first parameter in the at least one parameter group includes the length of the filter, and the at least one parameter group satisfies at least one of the following: the symbol rate is 983.04 MHz and the filter length is 3, and the cyclic prefix length is 36, or the symbol rate is 983.04 MHz and the filter length is 7, and the cyclic prefix length is 40, or the symbol rate is 1310.7 MHz and the filter length is 3, and the cyclic prefix length is 48, or the symbol rate is 1310.7 MHz and the filter length is 7, and the cyclic prefix length is 52, or the symbol rate is 1966.08 MHz z and the filter length is 3, the cyclic prefix length is 70, or, the symbol rate is 1966.08 MHz and the filter length is 7, the cyclic prefix length is 72, or, the symbol rate is 1966.08 MHz and the filter length is 11, the cyclic prefix length is 78, or, the symbol rate is 2621.4 MHz and the filter length is 9, the cyclic prefix length is 98, or, the symbol rate is 2621.4 MHz and the filter length is 17, the cyclic prefix length is 106, or, the symbol rate is 2949.12 MHz and the filter length is 9, the cyclic prefix length is 108, or, the symbol rate is 2949.12 MHz and the filter length is 17, the cyclic prefix length is 116.

[0029] Based on the above solution, the terminal device can directly determine the symbol rate, the first parameter and the corresponding cyclic prefix length according to the first index and the first association relationship, which has low performance requirements for the terminal device.

[0030] In combination with the first aspect, in certain implementations of the first aspect, at least one parameter group among the multiple parameter groups further includes a third parameter, where the third parameter is an equivalent duration corresponding to the cyclic prefix length, and the cyclic prefix length and the third parameter satisfy one of the following: the cyclic prefix length is 20 or 40, and the third parameter is 20.3 ns; or, the cyclic prefix length is 53 or 106, and the third parameter is 20.3 ns; or, the cyclic prefix length is any one of 26, 52, 39 or 78, and the third parameter is 19.8 ns; or, the cyclic prefix length is 58 or 116, and the third parameter is 19.6 ns; or, the cyclic prefix length is 49 or 98, and the third parameter is 18.6 ns; or, the cyclic prefix length is any one of 18, 24, 36, 48, 54 or 72, and the third parameter is 18.3 ns; or, the cyclic prefix length is 35 or 70, and the third parameter is 17.6 ns.

[0031] Based on the above solution, the terminal device can directly determine the equivalent duration corresponding to the cyclic prefix to be added according to the first index and the first association relationship, thereby improving the efficiency of the terminal device in signal transmission according to the first parameter group.

[0032] In combination with the first aspect, in certain implementations of the first aspect, at least one parameter group among the multiple parameter groups also includes a sampling frequency, an oversampling multiple, a first bandwidth, at least one of a fourth parameter or a fifth parameter, the oversampling multiple is the ratio of the sampling frequency to the symbol rate, the first bandwidth is the bandwidth used to transmit the first signal, the fourth bandwidth is the number of signals in each symbol in the first signal, and the fifth parameter is the number of symbols of the first signal transmitted per unit time.

[0033] Among them, the sampling frequency = 15KHz×2 c , C is a positive integer. As an example and not a limitation, C can be 17, 18, 19, 20, 21, etc., that is, Fs may be 3932.16Mhz, or 1966.08Mhz, or 983.04Mhz, or 491.52Mhz, etc.

[0034] It can be understood that the embodiment of the present application does not limit the specific form of indicating the sampling frequency or symbol rate in the parameter group.

[0035] As an example and not a limitation, the parameter group can display an indication of the sampling frequency and symbol rate, so that the terminal device can determine the symbol period in the first signal based on the first parameter group, and the symbol period in the first signal is aligned with the symbol period of the multi-carrier symbol, thereby realizing the multiplexing of single-carrier waveform and multi-carrier waveform.

[0036] As an example and not limitation, the parameter group may display any one of the indication sampling frequency or symbol rate. Exemplarily, the parameter group may indicate the sampling frequency in the form of sampling frequency (oversampling multiple) or sampling frequency (1 / oversampling multiple), wherein the oversampling multiple is the ratio of the sampling frequency to the symbol rate, so when the sampling frequency is known, the terminal device can calculate the corresponding symbol rate. It is easy to understand that when the parameter group indicates the symbol rate in the form of symbol rate (oversampling multiple) or symbol rate (1 / oversampling multiple), the terminal device can determine the corresponding sampling frequency. Based on the above-mentioned sampling frequency and symbol rate, the terminal device can determine the symbol period in the first signal according to the first parameter group, and the symbol period in the first signal is aligned with the symbol period of the multi-carrier symbol, thereby realizing the multiplexing of single-carrier waveform and multi-carrier waveform.

[0037] It can be understood that the sampling frequency is equal to the sampling frequency corresponding to a subcarrier spacing of the multicarrier. It can be understood that, under the same subcarrier spacing, the sampling frequency in each parameter group of the first association relationship is equal to the sampling frequency corresponding to the multicarrier.

[0038] It can be understood that the symbol period determined based on the symbol rate is equal to the symbol period of a subcarrier interval of the multi-carrier. It can be understood that, at the same subcarrier interval, the symbol period determined based on the symbol rate in each parameter group of the first association relationship is equal to the symbol period of the multi-carrier symbol.

[0039] It can be understood that the first bandwidth can be understood as the entire bandwidth allocated by the network device to the terminal device for transmitting the first signal.

[0040] Exemplarily, the modulation mode of the first signal is quadrature amplitude modulation, and the fourth parameter is 256; the modulation mode of the first signal is offset quadrature amplitude modulation, and the fourth parameter is 512.

[0041] It can be understood that the number of signals in the single symbol can be understood as the number of DFT points, or understood as the data length in the single symbol.

[0042] Based on the above scheme, the terminal device can directly determine the sampling frequency, the oversampling multiple, the first bandwidth, at least one of the fourth parameter or the fifth parameter according to the first index and the first association relationship, which has low performance requirements for the terminal device and can improve the efficiency of signal transmission.

[0043] In combination with the first aspect, in certain implementations of the first aspect, before receiving the first information, the method also includes: sending second information, where the second information is used to indicate that the terminal device supports the use of a single carrier waveform to transmit signals, or the second information is used to request the use of a single carrier waveform to transmit signals.

[0044] The second information may be understood as capability information of the terminal device, which is used to indicate whether the terminal device supports signal transmission of a single carrier waveform.

[0045] As an example and not a limitation, the second information is used to indicate that the terminal device supports the use of a single-carrier waveform to transmit signals, or in other words, the second information is used to indicate that the terminal device belongs to a single-carrier type UE. For example, the second information identifies the UE as a UE with a single-carrier waveform through UE_type=SC.

[0046] As an example but not limitation, the second information is used to request to use a single carrier waveform to transmit a signal. For example, the second information indicates that the UE requests to use a single carrier waveform to transmit a signal through UE_SC_CONFIG=1.

[0047] It is understood that the embodiment of the present application does not limit the triggering conditions for the terminal device to send the second information to the network device. Exemplarily, the terminal device can send the second information to the network device when its capabilities are limited, such as when the battery is low.

[0048] Based on the above solution, the terminal device can send the second information to the network device, so that the network device can send the first index indicating the first parameter group to the terminal device according to the first association relationship, thereby improving the efficiency of signal transmission.

[0049] In combination with the first aspect, in some implementations of the first aspect, the first association relationship is predefined by a protocol.

[0050] In a second aspect, a signal transmission method is provided, the method comprising: sending first information, the first information being used to indicate a first index corresponding to a first signal, the first index being used to indicate a first parameter group in a first association relationship, the first association relationship comprising multiple indexes and multiple parameter groups corresponding to the multiple indexes respectively, the first parameter group being a parameter group associated with the first index, the parameter group comprising a first parameter of a symbol rate and a cyclic prefix length, wherein the first parameter is a parameter of a filter used to transmit the first signal, and the cyclic prefix length is the length of a cyclic prefix contained in each symbol in the first signal; and transmitting the first signal according to the first parameter group.

[0051] The method described in the second aspect can be executed by a network device. Unless otherwise specified, in this application, the network device can be the network device itself, a component in the network device (for example, a processor, a chip, or a chip system), or a logic module or software that implements all or part of the network device functions. This application does not specifically limit this.

[0052] It can be understood that the first signal is carried in a single carrier for transmission, or in other words, the first signal is transmitted between the terminal device and the network device using a single carrier waveform.

[0053] It can be understood that the above-mentioned first association relationship supports signal transmission in a scenario where single-carrier waveform and multi-carrier waveform coexist, and after receiving the first information and determining the first parameter group, the terminal device can process and transmit the first signal according to the single-carrier processing process.

[0054] It can be understood that the embodiment of the present application does not limit the uplink transmission or downlink transmission between the terminal device and the network device.

[0055] As an example and not a limitation, when the terminal device performs uplink transmission with the network device, the terminal device transmitting the first signal according to the first parameter group can be understood as the terminal device sending the first signal according to the first parameter group.

[0056] As an example and not a limitation, when the terminal device performs downlink transmission with the network device, the terminal device transmitting the first signal according to the first parameter group can be understood as the terminal device processing the received first signal according to the first parameter group.

[0057] It can be understood that the embodiment of the present application does not limit the specific expression of the first association relationship. For example, the first association relationship can be expressed in the form of a table.

[0058] It can be understood that the length of the cyclic prefix included in each symbol in the first signal can be understood as the number of cyclic prefixes included in each symbol in the first signal.

[0059] Based on the above scheme, the network device can send the first information to the terminal device, so that the terminal device can determine the first parameter group based on the first index and the first association relationship indicated by the first information, and the first parameter group includes the symbol rate, the filter parameters and the cyclic prefix length contained in each symbol, thereby alleviating the interference of the filter waveform to the signal to varying degrees and improving the stability of the receiver performance by configuring the corresponding cyclic prefix length for the filter using different combinations of symbol rates and filter parameters.

[0060] In combination with the second aspect, in certain implementations of the second aspect, the modulation mode corresponding to at least one parameter group among the multiple parameter groups is orthogonal amplitude modulation or offset orthogonal amplitude modulation, and the first parameter includes at least one of the roll-off factor of the filter or the length of the filter.

[0061] It can be understood that the embodiment of the present application does not limit the specific form of the modulation method corresponding to the at least one parameter group indicated by the first association relationship. The specific form can be referred to the relevant content of the first aspect and will not be repeated here.

[0062] Based on the above solution, the network device can indicate the modulation mode and the first parameter group of the first signal through the first index, so that the terminal device can correctly transmit the first signal according to the first parameter group, thereby improving the efficiency of signal transmission.

[0063] In combination with the first aspect, in certain implementations of the first aspect, the first parameter in at least one parameter group among the multiple parameter groups includes the length of the filter, and the longer the length of the filter, the larger the cyclic prefix length.

[0064] In combination with the second aspect, in certain implementations of the second aspect, the modulation mode corresponding to at least one parameter group among the multiple parameter groups is orthogonal amplitude modulation, the first parameter in the at least one parameter group includes a roll-off factor of the filter, and the at least one parameter group satisfies at least one of the following items: the symbol rate is 983.04 MHz and the roll-off factor is 3, and the cyclic prefix length is 18, or the symbol rate is 983.04 MHz and the roll-off factor is 2, and the cyclic prefix length is 18, or the symbol rate is 983.04 MHz and the roll-off factor is 1, and the cyclic prefix length is 18, or the symbol rate is 983.04 MHz and the roll-off factor is 0.5, and the cyclic prefix length is 20, or the symbol rate is 1310.7 MHz and the roll-off factor is 2, and the cyclic prefix length is 24, or the symbol rate is 1310.7 MHz and the roll-off factor is 1.25, and the cyclic prefix length is 24, or , the symbol rate is 1310.7 MHz and the roll-off factor is 0.5, and the cyclic prefix length is 26, or, the symbol rate is 1966.08 MHz and the roll-off factor is 1, and the cyclic prefix length is 35, or, the symbol rate is 1966.08 MHz and the roll-off factor is 0.5, and the cyclic prefix length is 36, or, the symbol rate is 1966.08 MHz and the roll-off factor is 0.25, and the cyclic prefix length is 39, or, The symbol rate is 2621.4 MHz and the roll-off factor is 0.5, and the cyclic prefix length is 49; alternatively, the symbol rate is 2621.4 MHz and the roll-off factor is 0.125, and the cyclic prefix length is 53; alternatively, the symbol rate is 2949.12 MHz and the roll-off factor is 0.33, and the cyclic prefix length is 54; alternatively, the symbol rate is 2949.12 MHz and the roll-off factor is 0.125, and the cyclic prefix length is 58.

[0065] In combination with the second aspect, in certain implementations of the second aspect, the modulation mode corresponding to at least one parameter group in the multiple parameter groups is orthogonal amplitude modulation, the first parameter in the at least one parameter group includes the length of the filter, and the at least one parameter group satisfies at least one of the following: the symbol rate is 983.04 MHz and the filter length is 1.5, and the cyclic prefix length is 18, or the symbol rate is 983.04 MHz and the filter length is 3.5, and the cyclic prefix length is 20, or the symbol rate is 1310.7 MHz and the filter length is 1.5, and the cyclic prefix length is 24, or the symbol rate is 1310.7 MHz and the filter length is 3.5, and the cyclic prefix length is 26, or the symbol rate is 1966.08 MHz. And the filter length is 1.5, the cyclic prefix length is 35, or, the symbol rate is 1966.08 MHz and the filter length is 3.5, the cyclic prefix length is 36, or, the symbol rate is 1966.08 MHz and the filter length is 5.5, the cyclic prefix length is 39, or, the symbol rate is 2621.4 MHz and the filter length is 4.5, the cyclic prefix length is 49, or, the symbol rate is 2621.4 MHz and the filter length is 8.5, the cyclic prefix length is 53, or, the symbol rate is 2949.12 MHz and the filter length is 4.5, the cyclic prefix length is 54, or, the symbol rate is 2949.12 MHz and the filter length is 8.5, the cyclic prefix length is 58.

[0066] In combination with the second aspect, in certain implementations of the second aspect, the modulation mode corresponding to at least one parameter group among the multiple parameter groups is offset quadrature amplitude modulation, the first parameter in the at least one parameter group includes a roll-off factor of the filter, and the at least one parameter group satisfies at least one of the following items: the symbol rate is 983.04 MHz and the roll-off factor is 3, and the cyclic prefix length is 36, or the symbol rate is 983.04 MHz and the roll-off factor is 2, and the cyclic prefix length is 36, or the symbol rate is 983.04 MHz and the roll-off factor is 1, and the cyclic prefix length is 36, or the symbol rate is 983.04 MHz and the roll-off factor is 0.5, and the cyclic prefix length is 40, or the symbol rate is 1310.7 MHz and the roll-off factor is 2, and the cyclic prefix length is 48, or the symbol rate is 1310.7 MHz and the roll-off factor is 1.25, and the cyclic prefix length is 48, or The symbol rate is 1310.7 MHz and the roll-off factor is 0.5, and the cyclic prefix length is 52, or the symbol rate is 1966.08 MHz and the roll-off factor is 1, and the cyclic prefix length is 70, or the symbol rate is 1966.08 MHz and the roll-off factor is 0.5, and the cyclic prefix length is 72, or the symbol rate is 1966.08 MHz and the roll-off factor is 0.25, and the cyclic prefix length is 78, or the symbol The symbol rate is 2621.4 MHz and the roll-off factor is 0.5, and the cyclic prefix length is 98; or, the symbol rate is 2621.4 MHz and the roll-off factor is 0.125, and the cyclic prefix length is 106; or, the symbol rate is 2949.12 MHz and the roll-off factor is 0.33, and the cyclic prefix length is 108; or, the symbol rate is 2949.12 MHz and the roll-off factor is 0.125, and the cyclic prefix length is 116.

[0067] In combination with the second aspect, in certain implementations of the second aspect, the modulation mode corresponding to at least one parameter group in the multiple parameter groups is offset quadrature amplitude modulation, the first parameter in the at least one parameter group includes the length of the filter, and the at least one parameter group satisfies at least one of the following: the symbol rate is 983.04 MHz and the filter length is 3, and the cyclic prefix length is 36, or the symbol rate is 983.04 MHz and the filter length is 7, and the cyclic prefix length is 40, or the symbol rate is 1310.7 MHz and the filter length is 3, and the cyclic prefix length is 48, or the symbol rate is 1310.7 MHz and the filter length is 7, and the cyclic prefix length is 52, or the symbol rate is 1966.08 MHz z and the filter length is 3, the cyclic prefix length is 70, or, the symbol rate is 1966.08 MHz and the filter length is 7, the cyclic prefix length is 72, or, the symbol rate is 1966.08 MHz and the filter length is 11, the cyclic prefix length is 78, or, the symbol rate is 2621.4 MHz and the filter length is 9, the cyclic prefix length is 98, or, the symbol rate is 2621.4 MHz and the filter length is 17, the cyclic prefix length is 106, or, the symbol rate is 2949.12 MHz and the filter length is 9, the cyclic prefix length is 108, or, the symbol rate is 2949.12 MHz and the filter length is 17, the cyclic prefix length is 116.

[0068] Based on the above solution, the network device sends the first information to the terminal device, so that the terminal device can directly determine the symbol rate, the first parameter and the corresponding cyclic prefix length according to the first index and the first association relationship, which has low performance requirements for the terminal device.

[0069] In combination with the second aspect, in certain implementations of the second aspect, at least one parameter group among the multiple parameter groups further includes a third parameter, where the third parameter is an equivalent duration corresponding to the cyclic prefix length, and the cyclic prefix length and the third parameter satisfy one of the following: the cyclic prefix length is 20 or 40, and the third parameter is 20.3 ns; or, the cyclic prefix length is 53 or 106, and the third parameter is 20.3 ns; or, the cyclic prefix length is any one of 26, 52, 39 or 78, and the third parameter is 19.8 ns; or, the cyclic prefix length is 58 or 116, and the third parameter is 19.6 ns; or, the cyclic prefix length is 49 or 98, and the third parameter is 18.6 ns; or, the cyclic prefix length is any one of 18, 24, 36, 48, 54 or 72, and the third parameter is 18.3 ns; or, the cyclic prefix length is 35 or 70, and the third parameter is 17.6 ns.

[0070] Based on the above scheme, the network device sends the first information to the terminal device, so that the terminal device can directly determine the equivalent duration corresponding to the cyclic prefix to be added based on the first index and the first association relationship, thereby improving the efficiency of the terminal device in signal transmission according to the first parameter group.

[0071] In combination with the second aspect, in certain implementations of the second aspect, at least one parameter group among the multiple parameter groups also includes a sampling frequency, an oversampling multiple, a first bandwidth, at least one of a fourth parameter or a fifth parameter, the oversampling multiple is the ratio of the sampling frequency to the symbol rate, the first bandwidth is the bandwidth used to transmit the first signal, the fourth bandwidth is the number of signals in each symbol in the first signal, and the fifth parameter is the number of symbols of the first signal transmitted per unit time.

[0072] It can be understood that the embodiment of the present application does not limit the specific form of indicating the sampling frequency or symbol rate in the parameter group. The specific form can be referred to the relevant content of the first aspect and will not be repeated here.

[0073] Based on the above scheme, the network device sends the first information to the terminal device, so that based on the above scheme, the terminal device can directly determine the sampling frequency, the oversampling multiple, the first bandwidth, at least one of the fourth parameter or the fifth parameter according to the first index and the first association relationship, which has low performance requirements for the terminal device and can improve the efficiency of signal transmission.

[0074] In combination with the second aspect, in certain implementations of the second aspect, before sending the first information, the method also includes: receiving second information, the second information being used to indicate that the terminal device supports the use of a single carrier waveform to transmit signals, or the second information being used to request the use of a single carrier waveform to transmit signals.

[0075] Among them, the second information can be understood as the capability information of the terminal device, which is used to indicate whether the terminal device supports signal transmission of a single carrier waveform, and the specific indication method of the second information can refer to the relevant description of the first aspect, which will not be repeated here.

[0076] Based on the above solution, the network device can send the first index indicating the first parameter group to the terminal device based on the first association relationship according to the second information sent by the terminal device, thereby improving the efficiency of signal transmission.

[0077] In combination with the second aspect, in some implementations of the second aspect, the first association relationship is predefined by a protocol.

[0078] According to a third aspect, a method for signal transmission is provided, the method comprising: receiving first information, the first information being used to indicate a first index corresponding to a first signal, the first signal being carried and transmitted in a single carrier, the first index being used to indicate a first parameter group in a first association relationship, the first association relationship comprising multiple indexes and multiple parameter groups corresponding to the multiple indexes respectively, the first parameter group being a parameter group associated with the first index, the parameter group comprising a symbol rate and a first parameter, the first parameter being a parameter of a filter used to transmit the first signal, wherein the first parameter group is used to indicate a first cyclic prefix length in a second association relationship, the second association relationship comprising the multiple parameter groups and multiple cyclic prefix lengths corresponding to the multiple parameter groups respectively, the first cyclic prefix length being the cyclic prefix length associated with the first parameter group, the first cyclic prefix length being the length of the cyclic prefix contained in each symbol in the first signal; and transmitting the first signal according to the first parameter group and the first cyclic prefix length.

[0079] The method described in the third aspect can be executed by a terminal device. Unless otherwise specified, in this application, the terminal device can be the terminal device itself, a component in the terminal device (for example, a processor, a chip, or a chip system), or a logic module or software that implements all or part of the terminal device functions. This application does not specifically limit this.

[0080] In combination with the third aspect, in certain implementations of the third aspect, the modulation mode corresponding to the first parameter group is quadrature amplitude modulation or offset quadrature amplitude modulation, and the first parameter includes at least one of the roll-off factor of the filter or the length of the filter.

[0081] In combination with the third aspect, in certain implementations of the third aspect, the first parameter includes the length of the filter, and the longer the length of the filter is, the larger the first cyclic prefix length is.

[0082] In combination with the third aspect, in some implementations of the third aspect, the modulation mode corresponding to the first parameter group is orthogonal amplitude modulation and the first parameter includes a roll-off factor of the filter, and the second association relationship includes at least one of the following: the symbol rate is 983.04 MHz and the roll-off factor is 3, and the cyclic prefix length is 18, or the symbol rate is 983.04 MHz and the roll-off factor is 2, and the cyclic prefix length is 18, or the symbol rate is 983.04 MHz and the roll-off factor is 1, and the cyclic prefix length is 18, or the symbol rate is 983.04 MHz and the roll-off factor is 0.5, and the cyclic prefix length is 20, or the symbol rate is 1310.7 MHz and the roll-off factor is 2, and the cyclic prefix length is 24, or the symbol rate is 1310.7 MHz and the roll-off factor is 1.25, and the cyclic prefix length is 24, or the symbol rate is 1310.7 MHz and the roll-off factor is 1.25, and the cyclic prefix length is 24, 0.7 MHz and the roll-off factor is 0.5, the cyclic prefix length is 26, or, the symbol rate is 1966.08 MHz and the roll-off factor is 1, the cyclic prefix length is 35, or, the symbol rate is 1966.08 MHz and the roll-off factor is 0.5, the cyclic prefix length is 36, or, the symbol rate is 1966.08 MHz and the roll-off factor is 0.25, the cyclic prefix length is 39, or, the symbol rate is The symbol rate is 2621.4 MHz and the roll-off factor is 0.5, the cyclic prefix length is 49, or, the symbol rate is 2621.4 MHz and the roll-off factor is 0.125, the cyclic prefix length is 53, or, the symbol rate is 2949.12 MHz and the roll-off factor is 0.33, the cyclic prefix length is 54, or, the symbol rate is 2949.12 MHz and the roll-off factor is 0.125, the cyclic prefix length is 58.

[0083] In conjunction with the third aspect, in certain implementations of the third aspect, the modulation mode corresponding to the first parameter group is quadrature amplitude modulation and the first parameter includes the length of the filter, and the second association includes at least one of the following: the symbol rate is 983.04 MHz, the filter length is 1.5, and the cyclic prefix length is 18; or, the symbol rate is 983.04 MHz, the filter length is 3.5, and the cyclic prefix length is 20; or, the symbol rate is 1310.7 MHz, the filter length is 1.5, and the cyclic prefix length is 24; or, the symbol rate is 1310.7 MHz, the filter length is 3.5, and the cyclic prefix length is 26; or, the symbol rate is 1966.08 MHz, and the filter length is 1. 5, the cyclic prefix length is 35, or, the symbol rate is 1966.08 MHz and the filter length is 3.5, the cyclic prefix length is 36, or, the symbol rate is 1966.08 MHz and the filter length is 5.5, the cyclic prefix length is 39, or, the symbol rate is 2621.4 MHz and the filter length is 4.5, the cyclic prefix length is 49, or, the symbol rate is 2621.4 MHz and the filter length is 8.5, the cyclic prefix length is 53, or, the symbol rate is 2949.12 MHz and the filter length is 4.5, the cyclic prefix length is 54, or, the symbol rate is 2949.12 MHz and the filter length is 8.5, the cyclic prefix length is 58.

[0084] In combination with the third aspect, in some implementations of the third aspect, the modulation mode corresponding to the first parameter group is offset quadrature amplitude modulation and the first parameter includes a roll-off factor of the filter, and the second association relationship includes at least one of the following: the symbol rate is 983.04 MHz and the roll-off factor is 3, and the cyclic prefix length is 36, or the symbol rate is 983.04 MHz and the roll-off factor is 2, and the cyclic prefix length is 36, or the symbol rate is 983.04 MHz and the roll-off factor is 1, and the cyclic prefix length is 36, or the symbol rate is 983.04 MHz and the roll-off factor is 0.5, and the cyclic prefix length is 40, or the symbol rate is 1310.7 MHz and the roll-off factor is 2, and the cyclic prefix length is 48, or the symbol rate is 1310.7 MHz and the roll-off factor is 1.25, and the cyclic prefix length is 48, or the symbol rate is 1310.7 MHz and the roll-off factor is 1.25, and the cyclic prefix length is 48, or 0.7 MHz and the roll-off factor is 0.5, the cyclic prefix length is 52, or, the symbol rate is 1966.08 MHz and the roll-off factor is 1, the cyclic prefix length is 70, or, the symbol rate is 1966.08 MHz and the roll-off factor is 0.5, the cyclic prefix length is 72, or, the symbol rate is 1966.08 MHz and the roll-off factor is 0.25, the cyclic prefix length is 78, or, the symbol rate is 2 The symbol rate is 621.4 MHz and the roll-off factor is 0.5, and the cyclic prefix length is 98; or, the symbol rate is 2621.4 MHz and the roll-off factor is 0.125, and the cyclic prefix length is 106; or, the symbol rate is 2949.12 MHz and the roll-off factor is 0.33, and the cyclic prefix length is 108; or, the symbol rate is 2949.12 MHz and the roll-off factor is 0.125, and the cyclic prefix length is 116.

[0085] In combination with the third aspect, in certain implementations of the third aspect, the modulation mode corresponding to the first parameter group is offset quadrature amplitude modulation and the first parameter includes the length of the filter, and the second association relationship includes at least one of the following: the symbol rate is 983.04 MHz and the filter length is 3, and the cyclic prefix length is 36, or the symbol rate is 983.04 MHz and the filter length is 7, and the cyclic prefix length is 40, or the symbol rate is 1310.7 MHz and the filter length is 3, and the cyclic prefix length is 48, or the symbol rate is 1310.7 MHz and the filter length is 7, and the cyclic prefix length is 52, or the symbol rate is 1966.08 MHz and the filter length is 3. , the cyclic prefix length is 70, or, the symbol rate is 1966.08 MHz and the filter length is 7, the cyclic prefix length is 72, or, the symbol rate is 1966.08 MHz and the filter length is 11, the cyclic prefix length is 78, or, the symbol rate is 2621.4 MHz and the filter length is 9, the cyclic prefix length is 98, or, the symbol rate is 2621.4 MHz and the filter length is 17, the cyclic prefix length is 106, or, the symbol rate is 2949.12 MHz and the filter length is 9, the cyclic prefix length is 108, or, the symbol rate is 2949.12 MHz and the filter length is 17, the cyclic prefix length is 116.

[0086] In combination with the third aspect, in certain implementations of the third aspect, the second association relationship also includes a third parameter, which is the equivalent duration of the cyclic prefix length, and the cyclic prefix length and the third parameter satisfy one of the following: the cyclic prefix length is 20 or 40, and the third parameter is 20.3 ns, or the cyclic prefix length is 53 or 106, and the third parameter is 20.3 ns, or the cyclic prefix length is any one of 26, 52, 39 or 78, and the third parameter is 19.8 ns, or the cyclic prefix length is 58 or 116, and the third parameter is 19.6 ns, or the cyclic prefix length is 49 or 98, and the third parameter is 18.6 ns, or the cyclic prefix length is any one of 18, 24, 36, 48, 54 or 72, and the third parameter is 18.3 ns, or the cyclic prefix length is 35 or 70, and the third parameter is 17.6 ns.

[0087] In combination with the third aspect, in certain implementations of the third aspect, at least one parameter group among the multiple parameter groups also includes a sampling frequency, an oversampling multiple, a first bandwidth, at least one of a fourth parameter or a fifth parameter, the oversampling multiple is the ratio of the sampling frequency to the symbol rate, the first bandwidth is the bandwidth used to transmit the first signal, the fourth bandwidth is the number of signals in each symbol in the first signal, and the fifth parameter is the number of symbols of the first signal transmitted per unit time.

[0088] In combination with the third aspect, in certain implementations of the third aspect, before receiving the first information, the method also includes: sending second information, where the second information is used to indicate that the terminal device supports the use of a single carrier waveform to transmit signals, or the second information is used to request the use of a single carrier waveform to transmit signals.

[0089] In combination with the third aspect, in certain implementations of the third aspect, the first association relationship and the second association relationship are predefined by a protocol.

[0090] In a fourth aspect, a method for signal transmission is provided, the method comprising: receiving first information, the first information being used to indicate a first index corresponding to a first signal, the first signal being carried and transmitted in a single carrier, the first index being used to indicate a first parameter group in a first association relationship, the first association relationship comprising multiple indexes and multiple parameter groups corresponding to the multiple indexes respectively, the first parameter group being a parameter group associated with the first index, the parameter group comprising a symbol rate and a first parameter, the first parameter being a parameter of a filter used to transmit the first signal, wherein the first parameter group is used to indicate a first cyclic prefix length in a second association relationship, the second association relationship comprising the multiple parameter groups and multiple cyclic prefix lengths corresponding to the multiple parameter groups respectively, the first cyclic prefix length being the cyclic prefix length associated with the first parameter group, the first cyclic prefix length being the length of the cyclic prefix contained in each symbol in the first signal; and transmitting the first signal according to the first parameter group and the first cyclic prefix length.

[0091] The method described in the fourth aspect can be executed by a network device. Unless otherwise specified, in this application, the network device can be the network device itself, a component in the network device (for example, a processor, a chip, or a chip system), or a logic module or software that implements all or part of the network device functions. This application is not specifically limited here.

[0092] In combination with the fourth aspect, in certain implementations of the fourth aspect, the modulation mode corresponding to the first parameter group is quadrature amplitude modulation or offset quadrature amplitude modulation, and the first parameter includes at least one of the roll-off factor of the filter or the length of the filter.

[0093] In combination with the fourth aspect, in certain implementations of the fourth aspect, the first parameter includes the length of the filter, and the longer the length of the filter is, the larger the first cyclic prefix length is.

[0094] In combination with the fourth aspect, in some implementations of the fourth aspect, the modulation mode corresponding to the first parameter group is orthogonal amplitude modulation and the first parameter includes a roll-off factor of the filter, and the second association relationship includes at least one of the following: the symbol rate is 983.04 MHz and the roll-off factor is 3, and the cyclic prefix length is 18, or the symbol rate is 983.04 MHz and the roll-off factor is 2, and the cyclic prefix length is 18, or the symbol rate is 983.04 MHz and the roll-off factor is 1, and the cyclic prefix length is 18, or the symbol rate is 983.04 MHz and the roll-off factor is 0.5, and the cyclic prefix length is 20, or the symbol rate is 1310.7 MHz and the roll-off factor is 2, and the cyclic prefix length is 24, or the symbol rate is 1310.7 MHz and the roll-off factor is 1.25, and the cyclic prefix length is 24, or the symbol rate is 1310.7 MHz and the roll-off factor is 1.25, and the cyclic prefix length is 24, or 0.7 MHz and the roll-off factor is 0.5, the cyclic prefix length is 26, or, the symbol rate is 1966.08 MHz and the roll-off factor is 1, the cyclic prefix length is 35, or, the symbol rate is 1966.08 MHz and the roll-off factor is 0.5, the cyclic prefix length is 36, or, the symbol rate is 1966.08 MHz and the roll-off factor is 0.25, the cyclic prefix length is 39, or, the symbol rate is The symbol rate is 2621.4 MHz and the roll-off factor is 0.5, the cyclic prefix length is 49, or, the symbol rate is 2621.4 MHz and the roll-off factor is 0.125, the cyclic prefix length is 53, or, the symbol rate is 2949.12 MHz and the roll-off factor is 0.33, the cyclic prefix length is 54, or, the symbol rate is 2949.12 MHz and the roll-off factor is 0.125, the cyclic prefix length is 58.

[0095] In conjunction with the fourth aspect, in certain implementations of the fourth aspect, the modulation mode corresponding to the first parameter group is quadrature amplitude modulation and the first parameter includes the length of the filter, and the second association includes at least one of the following: the symbol rate is 983.04 MHz, the filter length is 1.5, and the cyclic prefix length is 18; or, the symbol rate is 983.04 MHz, the filter length is 3.5, and the cyclic prefix length is 20; or, the symbol rate is 1310.7 MHz, the filter length is 1.5, and the cyclic prefix length is 24; or, the symbol rate is 1310.7 MHz, the filter length is 3.5, and the cyclic prefix length is 26; or, the symbol rate is 1966.08 MHz, and the filter length is 1. 5, the cyclic prefix length is 35, or, the symbol rate is 1966.08 MHz and the filter length is 3.5, the cyclic prefix length is 36, or, the symbol rate is 1966.08 MHz and the filter length is 5.5, the cyclic prefix length is 39, or, the symbol rate is 2621.4 MHz and the filter length is 4.5, the cyclic prefix length is 49, or, the symbol rate is 2621.4 MHz and the filter length is 8.5, the cyclic prefix length is 53, or, the symbol rate is 2949.12 MHz and the filter length is 4.5, the cyclic prefix length is 54, or, the symbol rate is 2949.12 MHz and the filter length is 8.5, the cyclic prefix length is 58.

[0096] In combination with the fourth aspect, in some implementations of the fourth aspect, the modulation mode corresponding to the first parameter group is offset quadrature amplitude modulation and the first parameter includes a roll-off factor of the filter, and the second association relationship includes at least one of the following: the symbol rate is 983.04 MHz and the roll-off factor is 3, and the cyclic prefix length is 36, or the symbol rate is 983.04 MHz and the roll-off factor is 2, and the cyclic prefix length is 36, or the symbol rate is 983.04 MHz and the roll-off factor is 1, and the cyclic prefix length is 36, or the symbol rate is 983.04 MHz and the roll-off factor is 0.5, and the cyclic prefix length is 40, or the symbol rate is 1310.7 MHz and the roll-off factor is 2, and the cyclic prefix length is 48, or the symbol rate is 1310.7 MHz and the roll-off factor is 1.25, and the cyclic prefix length is 48, or the symbol rate is 1310.7 MHz and the roll-off factor is 1.25, and the cyclic prefix length is 48, or 0.7 MHz and the roll-off factor is 0.5, the cyclic prefix length is 52, or, the symbol rate is 1966.08 MHz and the roll-off factor is 1, the cyclic prefix length is 70, or, the symbol rate is 1966.08 MHz and the roll-off factor is 0.5, the cyclic prefix length is 72, or, the symbol rate is 1966.08 MHz and the roll-off factor is 0.25, the cyclic prefix length is 78, or, the symbol rate is 2 The symbol rate is 621.4 MHz and the roll-off factor is 0.5, and the cyclic prefix length is 98; or, the symbol rate is 2621.4 MHz and the roll-off factor is 0.125, and the cyclic prefix length is 106; or, the symbol rate is 2949.12 MHz and the roll-off factor is 0.33, and the cyclic prefix length is 108; or, the symbol rate is 2949.12 MHz and the roll-off factor is 0.125, and the cyclic prefix length is 116.

[0097] In combination with the fourth aspect, in certain implementations of the fourth aspect, the modulation mode corresponding to the first parameter group is offset quadrature amplitude modulation and the first parameter includes the length of the filter, and the second association relationship includes at least one of the following: the symbol rate is 983.04 MHz and the filter length is 3, and the cyclic prefix length is 36, or the symbol rate is 983.04 MHz and the filter length is 7, and the cyclic prefix length is 40, or the symbol rate is 1310.7 MHz and the filter length is 3, and the cyclic prefix length is 48, or the symbol rate is 1310.7 MHz and the filter length is 7, and the cyclic prefix length is 52, or the symbol rate is 1966.08 MHz and the filter length is 3. , the cyclic prefix length is 70, or, the symbol rate is 1966.08 MHz and the filter length is 7, the cyclic prefix length is 72, or, the symbol rate is 1966.08 MHz and the filter length is 11, the cyclic prefix length is 78, or, the symbol rate is 2621.4 MHz and the filter length is 9, the cyclic prefix length is 98, or, the symbol rate is 2621.4 MHz and the filter length is 17, the cyclic prefix length is 106, or, the symbol rate is 2949.12 MHz and the filter length is 9, the cyclic prefix length is 108, or, the symbol rate is 2949.12 MHz and the filter length is 17, the cyclic prefix length is 116.

[0098] In combination with the fourth aspect, in certain implementations of the fourth aspect, the second association relationship also includes a third parameter, which is the equivalent duration of the cyclic prefix length, and the cyclic prefix length and the third parameter satisfy one of the following: the cyclic prefix length is 20 or 40, and the third parameter is 20.3 ns, or the cyclic prefix length is 53 or 106, and the third parameter is 20.3 ns, or the cyclic prefix length is any one of 26, 52, 39 or 78, and the third parameter is 19.8 ns, or the cyclic prefix length is 58 or 116, and the third parameter is 19.6 ns, or the cyclic prefix length is 49 or 98, and the third parameter is 18.6 ns, or the cyclic prefix length is any one of 18, 24, 36, 48, 54 or 72, and the third parameter is 18.3 ns, or the cyclic prefix length is 35 or 70, and the third parameter is 17.6 ns.

[0099] In combination with the fourth aspect, in certain implementations of the fourth aspect, at least one parameter group among the multiple parameter groups also includes a sampling frequency, an oversampling multiple, a first bandwidth, at least one of a fourth parameter or a fifth parameter, the oversampling multiple is the ratio of the sampling frequency to the symbol rate, the first bandwidth is the bandwidth used to transmit the first signal, the fourth bandwidth is the number of signals in each symbol in the first signal, and the fifth parameter is the number of symbols of the first signal transmitted per unit time.

[0100] In combination with the fourth aspect, in certain implementations of the fourth aspect, the first association relationship and the second association relationship are predefined by a protocol.

[0101] In a fifth aspect, a signal transmission device is provided, which includes: a transceiver unit for receiving first information, the first information being used to indicate a first index corresponding to a first signal, the first signal being carried and transmitted in a single carrier, the first index being used to indicate a first parameter group in a first association relationship, the first association relationship including multiple indexes and multiple parameter groups corresponding to the multiple indexes respectively, the first parameter group being a parameter group associated with the first index, the parameter group including a symbol rate, a first parameter and a cyclic prefix length, wherein the first parameter is a parameter of a filter used to transmit the first signal, and the cyclic prefix length is the length of the cyclic prefix contained in each symbol in the first signal; a processing unit for transmitting the first signal according to the first parameter group.

[0102] The transceiver unit can perform the reception and transmission processing in the aforementioned first aspect, and the processing unit can perform other processing except reception and transmission in the aforementioned first aspect.

[0103] In the sixth aspect, a signal transmission device is provided, which includes: a transceiver unit for sending first information, the first information being used to indicate a first index corresponding to a first signal, the first signal being carried in a single carrier for transmission, the first index being used to indicate a first parameter group in a first association relationship, the first association relationship including multiple indexes and multiple parameter groups corresponding to the multiple indexes respectively, the first parameter group being a parameter group associated with the first index, the parameter group including a symbol rate, a first parameter and a cyclic prefix length, wherein the first parameter is a parameter of a filter used to transmit the first signal, and the cyclic prefix length is the length of the cyclic prefix contained in each symbol in the first signal; a processing unit for transmitting the first signal according to the first parameter group.

[0104] The transceiver unit can perform the reception and transmission processing in the aforementioned second aspect, and the processing unit can perform other processing except reception and transmission in the aforementioned second aspect.

[0105] In the seventh aspect, a signal transmission device is provided, which includes: a transceiver unit for receiving first information, the first information being used to indicate a first index corresponding to a first signal, the first signal being carried and transmitted in a single carrier, the first index being used to indicate a first parameter group in a first association relationship, the first association relationship including multiple indexes and multiple parameter groups corresponding to the multiple indexes respectively, the first parameter group being a parameter group associated with the first index, the parameter group including a symbol rate and a first parameter, the first parameter being a parameter of a filter used to transmit the first signal, wherein the first parameter group is used to indicate a first cyclic prefix length in a second association relationship, the second association relationship including the multiple parameter groups and multiple cyclic prefix lengths corresponding to the multiple parameter groups respectively, the first cyclic prefix length being the cyclic prefix length associated with the first parameter group, and the first cyclic prefix length being the length of the cyclic prefix contained in each symbol in the first signal; and a processing unit for transmitting the first signal according to the first parameter group and the first cyclic prefix length.

[0106] The transceiver unit can perform the receiving and sending processing in the aforementioned third aspect, and the processing unit can perform other processing except receiving and sending in the aforementioned third aspect.

[0107] In an eighth aspect, a signal transmission device is provided, which includes: a transceiver unit for receiving first information, the first information being used to indicate a first index corresponding to a first signal, the first signal being carried and transmitted in a single carrier, the first index being used to indicate a first parameter group in a first association relationship, the first association relationship including multiple indexes and multiple parameter groups corresponding to the multiple indexes respectively, the first parameter group being a parameter group associated with the first index, the parameter group including a symbol rate and a first parameter, the first parameter being a parameter of a filter used to transmit the first signal, wherein the first parameter group is used to indicate a first cyclic prefix length in a second association relationship, the second association relationship including multiple parameter groups and multiple cyclic prefix lengths corresponding to the multiple parameter groups respectively, the first cyclic prefix length being the cyclic prefix length associated with the first parameter group, and the first cyclic prefix length being the length of the cyclic prefix contained in each symbol in the first signal; and a processing unit for transmitting the first signal according to the first parameter group and the first cyclic prefix length.

[0108] The transceiver unit can perform the receiving and sending processing in the aforementioned fourth aspect, and the processing unit can perform other processing except receiving and sending in the aforementioned fourth aspect.

[0109] In a ninth aspect, a signal transmission device is provided. The signal transmission device includes a transceiver, a processor, and a memory. The processor is configured to control the transceiver to transmit and receive signals. The memory is configured to store a computer program. The processor is configured to retrieve and execute the computer program from the memory, so that the signal transmission device performs the method of any possible implementation of the first to sixth aspects.

[0110] Optionally, there are one or more processors and one or more memories.

[0111] Optionally, the memory may be integrated with the processor, or the memory may be provided separately from the processor.

[0112] Optionally, the signal transmission device further includes a transmitter (emitter) and a receiver (receiver).

[0113] In a tenth aspect, a signal transmission system is provided. The signal transmission system includes a terminal device and a network device, wherein the terminal device is configured to execute the method of the first or third aspect and any possible implementation of the first or third aspect, and the network device is configured to execute the method of the second or fourth aspect and any possible implementation of the second or fourth aspect.

[0114] In an eleventh aspect, a computer program is provided, which, when executed, causes the method in any possible implementation of the first to fourth aspects or the first to fourth aspects to be executed.

[0115] In a twelfth aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores a computer program or code, which, when executed, causes the method of any possible implementation of the first to fourth aspects or the first to fourth aspects to be executed.

[0116] In a thirteenth aspect, a chip is provided. The chip includes at least one processor coupled to a memory, the memory being configured to store a computer program, and the processor being configured to retrieve and execute the computer program from the memory, so that a communication device equipped with the chip system performs the method described in any one of the first to fourth aspects or any possible implementation of the first to fourth aspects.

[0117] The chip may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.

[0118] In a fourteenth aspect, a computer program product is provided, comprising: computer program code, which, when executed, causes the method in any possible implementation of the first to fourth aspects or the first to fourth aspects to be executed.

[0119] In the fifteenth aspect, a signal transmission method is provided, which includes: the terminal device executes the method in the above-mentioned first aspect or third aspect and any possible implementation of the first aspect or third aspect, and the network device executes the method in the above-mentioned second aspect or fourth aspect and any possible implementation of the second aspect or fourth aspect.

[0120] It can be understood that the supplements, explanations and beneficial effects of the first or second aspect are also applicable to the third to fifteenth aspects above, and will not be repeated for the sake of brevity. BRIEF DESCRIPTION OF THE DRAWINGS

[0121] Figure 1 It is a schematic diagram of constellation points and bit mapping rules;

[0122] Figure 2 It is a processing flow diagram of DFT-s-OFDM technology;

[0123] Figure 3 It is a processing flow diagram of SC-QAM technology;

[0124] Figure 4 It is a processing flow diagram of SC-FDE technology;

[0125] Figure 5 It is a schematic diagram of a single carrier symbol format;

[0126] Figure 6 A schematic diagram of a system architecture using an embodiment of the present application;

[0127] Figure 7 is a schematic diagram of a signal transmission method 700 provided in an embodiment of the present application;

[0128] Figure 8 This is a schematic diagram of the processing flow of the SC-QAM technology provided in an embodiment of the present application;

[0129] Figure 9 This is a schematic diagram of the multi-carrier reception process provided by an embodiment of the present application;

[0130] Figure 10 is a schematic block diagram of a communication device 1000 according to an embodiment of the present application;

[0131] Figure 11 is a schematic block diagram of a communication device 1100 according to an embodiment of the present application;

[0132] Figure 12 is a schematic block diagram of a communication device 1200 according to an embodiment of the present application;

[0133] Figure 13 is a schematic block diagram of a communication device 1300 according to an embodiment of the present application;

[0134] Figure 14 It is a schematic block diagram of a communication device 1400 according to an embodiment of the present application. DETAILED DESCRIPTION

[0135] The technical solution in this application will be described below with reference to the accompanying drawings.

[0136] The technical solutions provided in this application can be applied to various communication systems, such as the fifth generation (5G) or new radio (NR) system, long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD) system, and the three major application scenarios of the fifth generation (5G) mobile communication system (enhanced mobile broadband, eMBB) enhanced mobile broadband, (ultra reliable & low latency communication, URLLC) low latency and high reliability and (massive machine type communication, mMTC) massive Internet of Things communication. The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation (6G) mobile communication system. The technical solutions provided in this application can also be applied to device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-to-machine (M2M) communication, machine type communication (MTC), and Internet of Things (IoT) communication systems or other communication systems. The technical solutions provided in the embodiments of this application can also be applied to next-generation microwave scenarios, NR-based microwave scenarios, or integrated access backhaul (IAB) scenarios.

[0137] The network device in the embodiment of the present application can be any device with wireless transceiver functions. For example: an evolved Node basestation (NodeB or eNB or e-NodeB) in LTE, a base station (next-generation Node basestation, gNodeB or gNB) or a transmission receiving point (TRP) in NR, a base station of subsequent evolution of 3GPP, an access node in a WiFi system, a wireless relay node, a wireless backhaul node, etc. The base station can be: a macro base station, a micro base station, a pico base station, a small station, a relay station, or a balloon station, etc. Multiple base stations can support the networks of the same technology mentioned above, or they can support the networks of the different technologies mentioned above. The base station can include one or more co-sited or non-co-sited TRPs. The network device can also be a wireless controller, a centralized unit (CU), and / or a distributed unit (DU) in a cloud radio access network (CRAN) scenario. The network device can also be a server, a wearable device, or a vehicle-mounted device, etc. The following description uses a base station as an example of a network device. The multiple network devices may be base stations of the same type or different types. A base station may communicate with a terminal or communicate with the terminal through a relay station. In the embodiments of the present application, the device for implementing the function of the network device may be a network device or a device capable of supporting the network device to implement the function, such as a chip system, which may be installed in the network device.

[0138] The terminal device in the embodiment of the present application is a device with wireless transceiver function, which can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on the water surface (such as ships, etc.); it can also be deployed in the air (for example, on airplanes, balloons and satellites, etc.). The terminal device can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a vehicle-mounted terminal device, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a wearable terminal device, etc. The embodiment of the present application does not limit the application scenario. Terminal equipment may sometimes also be referred to as terminal, user equipment (UE), access terminal equipment, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal equipment, mobile device, UE agent or UE device, etc. The terminal equipment may also be fixed or mobile. In the embodiment of the present application, the device for realizing the function of the terminal may be a terminal; it may also be a device that can support the terminal to realize the function, such as a chip system, which may be installed in the terminal. In the embodiment of the present application, the chip system may be composed of chips, or may include chips and other discrete devices.

[0139] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field will know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0140] To facilitate understanding of the embodiments of the present application, several basic concepts involved in the embodiments of the present application are briefly explained. It is understood that the basic concepts introduced below are briefly explained using the basic concepts specified in the current protocol as an example, but do not limit the embodiments of the present application to be applicable only to currently existing systems. Therefore, the names that appear when describing the currently existing systems as examples are all functional descriptions. The specific names are not limited and only represent the functions, and can be correspondingly extended to other systems, such as 6G or future communication systems.

[0141] (1) Peak to average power ratio (PAPR)

[0142] Observed in the time domain, wireless signals are sinusoidal waves with varying amplitudes. The amplitude is not constant. The peak amplitude within one cycle is different from the peak amplitude within another cycle, so the average power and peak power within each cycle are different. Over a long period of time, peak power is the maximum instantaneous power with a certain probability, typically 0.01% (10^-4). The ratio of the peak power at this probability to the system's total average power is the PAPR.

[0143] Wireless communication system signals require power amplification to be transmitted over long distances. Due to technical and equipment cost limitations, a power amplifier typically operates linearly within a certain range. Exceeding this range results in signal distortion, which prevents the receiver from correctly interpreting the signal. To ensure that the signal peak remains within the linear amplification range of the power amplifier, the average power of the transmitted signal must be reduced. This approach results in low power amplifier efficiency, or equivalently, a reduced coverage range.

[0144] (2) Modulation

[0145] In communication systems, the information to be transmitted is often represented by '0' or '1' bits. Since the signal is often an analog signal with frequency, amplitude, and phase, information bits can be carried on the signal through modulation. QAM and OQAM are two different constellation point mapping methods. Figure 1 As shown in (a) of the figure, a point on the graph (or a symbol) can correspond to two information bits, that is, there are 2^2=4 symbols in quadrature phase shift keying (QPSK), and each symbol has its own amplitude and phase. It should be noted that in QPSK, the amplitude of the symbol is constant, and the phase difference between each symbol is π / 2. Figure 1 As shown in (b) of the figure, a point (or symbol) on the graph corresponds to four information bits. That means there are 2^4 = 16 symbols in 16QAM, each with its own amplitude and phase. It should be noted that 16QAM can have multiple amplitudes, and the phases between symbols can also vary.

[0146] In comparison, OQAM differs from QAM in that OQAM maps only real signals (i.e., the horizontal axis of the QAM constellation points) at odd positions, and only imaginary signals (i.e., the vertical axis of the QAM constellation points) at even positions. OQAM can be thought of as splitting the QAM signal into two signals for transmission. This transmission method makes the adjacent signals partially orthogonal (one in the real part, one in the imaginary part). This method can provide the benefit of low PAPR.

[0147] (3) Multi-carrier waveform

[0148] Orthogonal Frequency Division Multiplexing (OFDM) is a widely used waveform in various communication systems, such as LTE and NR. OFDM converts high-speed data streams into multiple parallel, lower-speed data streams through serial-to-parallel conversion, then distributes these streams across subchannels on subcarriers of different frequencies. This significantly improves spectrum efficiency. However, OFDM suffers from a high peak-to-average power ratio (PAPR). The output of a multicarrier system is the sum of multiple subchannel signals. Therefore, if the phases of the multiple signals align, the instantaneous power of the resulting summed signal will be significantly higher than the average power of the signals, resulting in a large peak-to-average power ratio (PAPR). This places high demands on the linearity of the amplifiers within the transmitter, potentially causing signal distortion and spectral shifts. This can disrupt the orthogonality between the subchannels, generating interference and degrading system performance.

[0149] The OFDM (discrete fourier transform spread orthogonal frequency division multiplexing, DFT-s-OFDM) multi-carrier waveform based on discrete Fourier transform spread orthogonal frequency division multiplexing, or DFT-s-OFDM) utilizes the transmitter structure of OFDM and performs precoding before data is mapped to subcarriers. This precoding can reduce PAPR. At the same power amplifier, the DFT-s-OFDM waveform can provide greater output power and higher power amplifier efficiency than the OFDM waveform, thereby improving coverage and reducing energy consumption. The coverage and power consumption advantages of the single-carrier waveform are particularly evident on the terminal device side. Therefore, in the current versions of LTE and NR, the single-carrier waveform is used for uplink transmission.

[0150] The DFT-s-OFDM technology has an additional discrete Fourier transform (DFT) process before the OFDM processing. Therefore, the DFT-s-OFDM technology can also be called the linear precoding OFDM technology. Figure 2 It is a schematic diagram of the processing flow of a DFT-s-OFDM technology provided by an embodiment of this application. As Figure 2 shown, the transmitter sequentially performs serial-to-parallel conversion, N-point discrete Fourier transform (DFT), subcarrier mapping, M-point inverse discrete Fourier transform (IDFT), parallel-to-serial conversion, adding cyclic prefix (CP), and digital-to-analog conversion (DAC) processing on the time-domain discrete sequence, and then transmits the signal through the antenna port and the channel. When the receiver receives the signal through the channel and the antenna port, it sequentially performs analog-to-digital conversion (ADC), removing the cyclic prefix, serial-to-parallel conversion, M-point DFT, removing subcarrier mapping, N-point IDFT, and parallel-to-serial conversion on the signal to obtain the time-domain discrete sequence.

[0151] Through the N-point DFT, the transmitter can obtain the frequency-domain sequence of the time-domain discrete sequence. After the subcarrier mapping of this frequency-domain sequence, it is input to the IDFT for M-point IDFT, where N < M. Since the length of the IDFT is greater than the length of the DFT, the extra part of the IDFT is padded with zeros when input. After the IDFT, adding the cyclic prefix can avoid symbol interference.

[0152] Currently, DFT-s-OFDM waveforms can be used for uplink transmission in LTE and NR communication systems. However, in high-frequency communication, due to limited device capabilities, the power amplifier power consumption and linearity performance are even worse. High-frequency communication can include the 24250 MHz to 52600 MHz band in NR systems, the 52600 MHz band supported by subsequent NR system evolution, or even higher frequency bands in next-generation communication systems, such as the terahertz (THz) band. In particular, at higher frequencies (above 52.6 GHz), the power amplifier power consumption and linearity performance are even worse. Due to the high PAPR of the OFDM waveform, the power amplifier cannot operate in the linear range, resulting in significant OFDM performance loss in this frequency band. DFT-s-OFDM, on the other hand, has the advantage of lower PAPR. However, at higher frequencies, the bandwidth is relatively large, such as the continuous spectrum of 2G. This results in a larger Fast Fourier Transform (FFT) size, which increases implementation complexity.

[0153] (4) Single carrier waveform

[0154] The single carrier-quadrature amplitude modulation (SC-QAM) waveform is a commonly used single carrier waveform and is widely used in communication systems such as the second-generation (2G) mobile communication system and Wi-Fi system. Figure 3 This is a schematic diagram of the processing flow of SC-QAM technology. Figure 3 As shown in the figure, the transmitter modulates, upsamples, and pulse shapes the signal encoded by the encoder, and finally transmits the processed signal through the RF device and antenna port. The receiver receives the signal from the transmitter through the antenna port and RF device, performs matched filtering, downsampling, and demodulation on the received signal, and inputs the processed signal into the decoder for decoding.

[0155] As can be seen above, the transmission and reception processes of SC-QAM technology are both completed in the time domain, involving time-domain matched filtering and up- and downsampling. There is no time-to-frequency transformation involved, namely, no DFT or Fast Fourier Transform (FFT) or IDFT or Inverse Fast Fourier Transform (IFFT). Therefore, compared to multi-carrier waveforms, SC-QAM waveforms have the advantages of lower complexity and lower PAPR.

[0156] In order to obtain the frequency diversity gain of a single carrier, resist the performance degradation caused by multipath interference, or improve the complexity of time domain equalization, a single carrier frequency domain equalization (SC-FDE) technology is proposed based on the SC-QAM technology. Figure 4 This is a schematic diagram of the processing flow of SC-FDE technology. Figure 4 As shown in the figure, the transmitter modulates the signal encoded by the encoder, adds a cyclic prefix (CP), performs upsampling, pulse shaping, and truncation, and finally transmits the processed signal through the RF device and antenna port. The receiver receives the signal from the transmitter through the antenna port and RF device, and performs matched filtering, downsampling, cyclic prefix removal, FFT, equalization, IDFT, and demodulation on the received signal. The processed signal is then input into the decoder for decoding.

[0157] exist Figure 4 In this process, the transmitter adds a cyclic prefix to combat multipath interference. The receiver performs FFT processing on the received signal, transforming the time-domain signal into the frequency-domain signal. Channel estimation and equalization are then performed on the frequency-domain signal to eliminate channel effects. After that, the frequency-domain signal is transformed into the time-domain signal through IDFT processing to obtain the constellation symbol. SC-FDE technology enables single-carrier systems to process multiple data simultaneously while overcoming the impact of multipath channels on system performance.

[0158] (5) Cyclic prefix

[0159] The cyclic prefix is a cyclic structure formed by copying the last element of a sequence to the front of the sequence. The purpose is to ensure that the delayed symbols always have an integer multiple of the period within the FFT integration period to overcome inter-subcarrier interference and inter-symbol interference. For example, the number of sampling points in the cyclic prefix is N CP , a symbol contains x(0), x(1)…x(NN CP )…x(N-1), a total of N sampling points. When adding a cyclic prefix, the last NCP The sampling points are copied and placed before the symbol. The sequence contained in the final generated symbol is x(NN CP )…x(N-1),x(0),x(1)…x(NN CP )…x(N-1), a total of N+N CP sampling points.

[0160] Figure 5 It is a schematic diagram of adding CP, such as Figure 5 As shown, the length of the FFT window corresponding to each symbol is the length of one symbol, and the starting position of the FFT receiving window corresponding to each symbol is determined according to the end position of the CP. For example, the starting position of FFT receiving window 0 corresponding to symbol 0 is the end position of the CP corresponding to symbol 0 in the received signal, the starting position of FFT receiving window 1 corresponding to symbol 1 is the end position of the CP corresponding to symbol 1 in the received signal, and the starting position of FFT receiving window 2 corresponding to symbol 2 is the end position of the CP corresponding to symbol 2 in the received signal. The dotted box in each symbol indicates the position of the cyclic prefix truncated in the symbol. For example, the signal in the dotted box in symbol 0 is copied before the starting position of symbol 0 as the starting position of symbol 0.

[0161] Currently, in scenarios where multi-carrier waveforms and single-carrier waveforms coexist, the receiving end supports using a unified receiver to process signals from either multi-carrier waveform or single-carrier waveform. However, when using a unified receiver to process signals from a single-carrier waveform formed using a time-domain convolution filter, assuming the receiver uses a unified frequency-domain signal processing method, different time-domain filter lengths will cause varying degrees of interference to the signal, resulting in varying degrees of impact on receiver performance and detrimental to the stability of the communication system.

[0162] In view of this, an embodiment of the present application provides a method and device for signal transmission, which can reduce the interference caused by different filter waveforms and improve the stability of the communication system in a scenario where multi-carrier waveforms and single-carrier waveforms coexist.

[0163] It is understood that the signal transmission method proposed in the embodiment of the present application can be executed by a terminal device, and the signal transmission device proposed in the embodiment of the present application can be a terminal device. Unless otherwise specified, in this application, the terminal device can be the terminal device itself, or a component in the terminal device (for example, a processor, a chip, or a chip system, etc.), or a logic module or software that implements all or part of the terminal device functions. This application is not specifically limited here. The following description is taken as an example of execution by a terminal device.

[0164] It is understood that the signal transmission method proposed in the embodiment of the present application can be executed by a network device, and the signal transmission device proposed in the embodiment of the present application can be a network device. Unless otherwise specified, in this application, the network device can be the network device itself, or a component in the network device (for example, a processor, a chip, or a chip system, etc.), or a logic module or software that implements all or part of the network device functions. This application is not specifically limited here. The following is an example of network device execution.

[0165] See Figure 6 , is a schematic diagram of the system architecture of the embodiment of the present application. Figure 6 The illustrated system architecture includes one network device and three terminal devices. Terminal device 1 communicates with the network device using a DFT-s-OFDM waveform, terminal device 2 communicates with the network device using an OFDM waveform, and terminal device 3 communicates with the network device using a CP-SC (e.g., CP-SC-QAM) waveform. Terminal devices 1, 2, and 3 are not limited to communicating with the network device using a single waveform. For example, in addition to the DFT-s-OFDM waveform, terminal device 1 can also communicate with the network device using an SC-QAM waveform.

[0166] It can be understood that the embodiments of the present application can be applied to wireless communication systems in which multi-carrier waveforms and single-carrier waveforms coexist. The wireless communication systems may include but are not limited to long-term evolution (LTE) systems, NR systems, future communication systems, etc., such as future networks or sixth-generation communication systems.

[0167] It should be noted that Figure 6 The number of devices, configurations, and three waveforms shown are for illustrative purposes only and do not limit the embodiments of the present application. For example, an actual application may include two or more network devices.

[0168] To facilitate understanding of the embodiments of the present application, the following points are explained:

[0169] First, in this application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments based on their internal logical relationships.

[0170] Second, in this application, "at least one" means one or more, and "more" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In the text description of this application, the character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can mean: a, or b, or c, or a and b, or a and c, or b and c, or a, b and c. Wherein a, b and c can be single or multiple, respectively.

[0171] Third, throughout this application, the terms "first," "second," and various numerical references (e.g., #1, #2, etc.) are used to distinguish between different messages for ease of description and are not intended to limit the scope of the embodiments of this application. For example, they are used to distinguish between different messages, rather than to describe a specific order or precedence. It is understood that the terms described in this manner are interchangeable where appropriate to describe scenarios beyond the embodiments of this application.

[0172] Fourth, in this application, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or are inherent to these processes, methods, products or apparatuses.

[0173] Fifth, in this application, "used to indicate" can include being used for direct indication and being used for indirect indication. When describing that a certain indication information indicates A, it can include that the indication information directly indicates A or indirectly indicates A, and it does not mean that the indication information must carry A.

[0174] The indication methods involved in the embodiments of this application can be understood to encompass various methods that enable the party to be indicated to obtain information to be indicated. The information to be indicated can be sent as a whole or divided into multiple sub-information and sent separately. The transmission period and / or timing of these sub-information can be the same or different. This application does not limit the specific transmission method.

[0175] In the embodiments of the present application, the "indication information" may be an explicit indication, i.e., a direct indication via signaling, or may be obtained based on parameters indicated by the signaling, in combination with other rules, other parameters, or by deduction. It may also be an implicit indication, i.e., based on a rule or relationship, or based on other parameters, or by deduction. This application does not impose specific limitations on this.

[0176] Sixth, in this application, "protocol" may refer to a standard protocol in the field of communications, such as the 5G protocol, the NR protocol, and related protocols used in future communication systems, and this application does not limit this. "Predefined" may include pre-definition. For example, protocol definition. "Preconfiguration" can be implemented by pre-saving corresponding codes, tables, or other methods that can be used to indicate relevant information in the device, and this application does not limit its specific implementation method.

[0177] Seventh, in this application, "storage" may refer to storage in one or more memories. The one or more memories may be separate or integrated into an encoder or decoder, a processor, or a communication device. The one or more memories may also be partially separate and partially integrated into a decoder, a processor, or a communication device. The memory may be any type of storage medium and is not limited in this application.

[0178] Eighth, in this application, if there is no logical conflict, "report", "feedback" and "send" can be interchanged.

[0179] Figure 7 FIG. 7 is a schematic diagram of a signal transmission method 700 provided in an embodiment of the present application. As shown in the figure, the method 700 includes the following steps:

[0180] S710: The network device sends first information to the terminal device, and the terminal device receives the first information in response, wherein the first information is used to indicate a first index corresponding to the first signal.

[0181] It is understood that the embodiments of the present application do not limit the specific manner in which the network device sends the first information to the terminal device. As an example and not a limitation, the network device may send the first information to the terminal device via downlink control information (DCI) or radio resource control (RC) information or a media access control control element (MAC CE).

[0182] It can be understood that the embodiment of the present application does not limit the triggering conditions for the network device to send the first information.

[0183] In a possible implementation, the network device actively sends the first information to the terminal device. Exemplarily, the network device may send the first information to the terminal device after the terminal device accesses the network.

[0184] In another possible implementation, the method 700 further includes the following steps:

[0185] S705: The terminal device sends second information to the network device, and the network device receives the second information. The second information can be understood as capability information of the terminal device, indicating whether the terminal device supports signal transmission of a single carrier waveform.

[0186] As an example and not a limitation, the second information is used to indicate that the terminal device supports the use of a single-carrier waveform to transmit signals, or in other words, the second information is used to indicate that the terminal device belongs to a single-carrier type UE. For example, the second information identifies the UE as a UE with a single-carrier waveform through UE_type=SC.

[0187] As an example but not limitation, the second information is used to request to use a single carrier waveform to transmit a signal. For example, the second information indicates that the UE requests to use a single carrier waveform to transmit a signal through UE_SC_CONFIG=1.

[0188] It is understood that the embodiment of the present application does not limit the triggering conditions for the terminal device to send the second information to the network device. Exemplarily, the terminal device can send the second information to the network device when its capabilities are limited, such as when the battery is low.

[0189] It is easy to understand that after receiving the above-mentioned second information, the network device can send the above-mentioned first information to the terminal device if it determines that the terminal device supports the use of a single-carrier waveform to transmit signals.

[0190] In an embodiment of the present application, the first index is used to indicate the first parameter group in the first association relationship. The first association relationship may include multiple indexes and multiple parameter groups corresponding to the multiple indexes respectively. The multiple indexes correspond one-to-one to the multiple parameter groups, and the first parameter group is the parameter group corresponding to the first index.

[0191] The embodiment of the present application proposes two methods to enable a terminal device to determine the length of the cyclic prefix in each symbol of the first signal based on the first index indicated by the first information. The following describes the method 1 and the method 2 respectively.

[0192] Method 1:

[0193] Each parameter group in the first association relationship includes the length of the cyclic prefix in each symbol in the first signal. Specifically, each parameter group includes a symbol rate, a first parameter and a cyclic prefix length, the first parameter is a parameter of a filter used to transmit the first signal, and the cyclic prefix length is the length of the cyclic prefix included in each symbol in the first signal. Specifically, the cyclic prefix length can be understood as the CP length in the signal transmitted at the symbol rate, and the first parameter is a parameter of a filter that uses the symbol rate for signal transmission. In this implementation, the terminal device can directly obtain the cyclic prefix length based on the first parameter group.

[0194] It can be understood that the length of the cyclic prefix included in each symbol in the first signal can be understood as the number of cyclic prefixes included in each symbol in the first signal.

[0195] It is understood that the first association relationship is known to both the network device and the terminal device. For example, the first association relationship may be pre-configured by the network device and the terminal device at the factory, or the first association relationship may be pre-defined by a protocol. The following description uses the example of the first association relationship being pre-defined by the protocol. The first association relationship may be a separate set pre-defined by the protocol, or a subset of a set pre-defined by the protocol.

[0196] It can be understood that the embodiment of the present application does not limit the specific expression of the first association relationship. For example, the first association relationship can be expressed in the form of a table.

[0197] It can be understood that the first parameter may include at least one of a roll-off factor of the filter or a length of the filter.

[0198] In a possible implementation, the first parameter is a roll-off factor of a filter, and the first association relationship can be found in Table 1.

[0199] Table 1 A transmission configuration information table

[0200]

[0201]

[0202] It can be understood that the NR system can support multiple subcarrier spacings (SCS), and the specific subcarrier spacing to be used is known to both the network equipment and the terminal equipment. The subcarrier spacing in Table 1 above takes 15kHz as an example and does not constitute a limitation on the embodiments of the present application.

[0203] It can be understood that the first association relationship can be all or part of the items in Table 1 above, and this embodiment of the present application is not limited to this.

[0204] It can be understood that the configuration index in Table 1 starts from "0". The above numbering is only for example. For example, the configuration index can also start from "1", and this embodiment of the present application is not limited to this.

[0205] It can be understood that in the embodiment of the present application, the roll-off factor is defined as the ratio of the repeated signal to the valid signal in a single symbol, and the CP length can be understood as the number of CPs added to the first signal.

[0206] As shown in Table 1, the multiple parameter groups in the first association relationship may include a combination of symbol rate, filter roll-off factor and CP length, that is, the first association relationship can configure a specific CP length for a filter using a specific roll-off factor at a specific symbol rate, thereby reducing the interference of different filters on the signal processing accuracy of the frequency domain receiver.

[0207] Furthermore, the terminal device can determine the roll-off factor and CP length corresponding to the first index in the above Table 1 based on the first index indicated by the first information. As an example and not a limitation, the first index is the configuration index "0", then the terminal device can determine that the symbol rate corresponding to the configuration index "0" is 983.04MHz, the roll-off factor is 3, and the CP length is 18 based on the above Table 1.

[0208] In another possible implementation, the first parameter is the length of the filter, and the first association relationship can be found in Table 2.

[0209] Table 2 A transmission configuration information table

[0210]

[0211]

[0212] It can be understood that the first association relationship can be all or part of the items in Table 2 above, and this embodiment of the present application is not limited to this.

[0213] As shown in Table 2, the multiple parameter groups in the first association relationship may include a combination of symbol rate, filter length, and CP length, that is, the first association relationship may configure a specific CP length for a filter using a specific filter length at a specific symbol rate, thereby reducing the interference of different filters on the signal processing accuracy of the frequency domain receiver.

[0214] Furthermore, the terminal device can determine the filter length and CP length corresponding to the first index in the above Table 2 based on the first index indicated by the first information. As an example and not a limitation, the first index is the configuration index "1", then the terminal device can determine that the symbol rate corresponding to the configuration index "1" is 983.04MHz, the filter length is 1.5, and the CP length is 24 based on the above Table 1.

[0215] Optionally, the first association relationship may further include a sampling frequency, and the embodiment of the present application does not limit the specific form of indicating the sampling frequency and symbol rate in the parameter group.

[0216] By way of example and not limitation, the parameter group may display a value indicating a sampling frequency and a value indicating a symbol rate.

[0217] As an example and not limitation, the parameter group may display any one of the sampling frequency or symbol rate. Exemplarily, the parameter group may indicate the sampling frequency in the form of sampling frequency (oversampling multiple) or sampling frequency (1 / oversampling multiple), wherein the oversampling multiple is the ratio of the sampling frequency to the symbol rate, so when the sampling frequency is known, the terminal device can calculate the corresponding symbol rate. It is easy to understand that when the parameter group indicates the symbol rate in the form of symbol rate (oversampling multiple) or symbol rate (1 / oversampling multiple), the terminal device can determine the corresponding sampling frequency.

[0218] In some possible implementations, the sampling frequencies included in the multiple parameter groups are the same as the sampling frequencies corresponding to the multi-carrier signals under the same subcarrier spacing, and the symbol period determined by the symbol rates included in the multiple parameter groups is the same as the symbol period in the multi-carrier signals under the same subcarrier spacing. In other words, in this implementation, the symbol period of the first signal determined by the terminal device based on the first parameter group is aligned with the symbol period of the multi-carrier symbol, thereby enabling multiplexing of a single-carrier waveform and a multi-carrier waveform. For example, Table 3 shows a first association relationship including sampling frequency, symbol rate, roll-off factor, and CP length.

[0219] It should be noted that the sampling frequency Fs in the transmission configuration parameter table provided in this implementation satisfies: S =15KHz×2 C , where C is a positive integer. For example, C can be 17, 18, 19, 20, 21, etc., meaning Fs can be 3932.16 MHz, 1966.08 MHz, 983.04 MHz, or 491.52 MHz. For example, when the subcarrier spacing is 15 kHz and C = 17, the sampling frequency is specified to be 3932.4 MHz.

[0220] It should be noted that the relationship between the symbol rate Fc and Fs in the transmission configuration parameter table provided in this implementation is: S =F C ×M / N, where M is the upsampling multiple, N is the downsampling multiple, and both M and N are positive integers greater than or equal to 1. For example, the value of M can be {2, 3, 4, 5, 6, 7, 8, 9, 10}, and the value of N can be {1, 2, 3, 4, 5, 6, 7, 8}.

[0221] Optionally, the first association relationship may further include a separate column of transmission parameters for indicating an oversampling multiple, such as “oversampling multiple” or “1 / oversampling multiple”.

[0222] Optionally, the first association may further include a separate list of transmission parameters indicating a first bandwidth, where the first bandwidth is used to transmit the first signal. The first bandwidth may be understood as the total bandwidth allocated by the network device to the terminal device for transmitting the first signal. It is understood that the first bandwidth may include a transmission bandwidth and an extended bandwidth, where the extended bandwidth is the bandwidth used for spectrum shaping. Spectrum shaping may be equivalent to the frequency domain shape of a time domain filter in a single-carrier waveform processing flow.

[0223] Optionally, the first association relationship may further include a separate transmission parameter (i.e., a third parameter) for indicating the equivalent duration of the cyclic prefix in the symbol. It is understood that the equivalent duration can be determined based on the symbol rate and CP length corresponding to the same configuration index. Exemplarily, when the first index is "1", the symbol rate corresponding to the first index is 983.04 MHz, the CP length is 18, and the CP equivalent duration is 18.3 ns.

[0224] Optionally, the first association may further include a separate transmission parameter (i.e., a fifth parameter) for indicating the number of symbols per unit time. It is understood that the number of symbols per unit time is used for frame alignment with the multi-carrier signal. Exemplarily, the unit time may be 0.125 ms.

[0225] Referring to Table 3, Table 3 shows a first association relationship including a roll-off factor, a filter length, a CP length, a sampling frequency, a symbol rate, an oversampling multiple, a first bandwidth, and a CP equivalent duration.

[0226] Table 3 Transmission configuration information table

[0227]

[0228] It can be understood that the NR system can support multiple subcarrier spacings (SCS), and the specific subcarrier spacing to be used is known to both the network equipment and the terminal equipment. The subcarrier spacing in Table 3 above takes 15kHz as an example, and the terms used in Table 3 above are only examples and do not constitute a limitation on the embodiments of the present application.

[0229] It can be understood that the modulation mode of the single carrier determined by the terminal device based on the first association relationship is one of QAM or OQAM, and the embodiment of the present application does not limit the specific form of the modulation mode indicated by the first association relationship.

[0230] In one possible implementation, the first association relationship may indicate the modulation mode of a single carrier by carrying the number of signals in a single symbol in each parameter group. For example, when the number of signals in a single symbol carried in the parameter group is 256, it indicates that the modulation mode of the single carrier is QAM; and when the number of signals in a single symbol carried in the parameter group is 512, it indicates that the modulation mode of the single carrier is OQAM.

[0231] It is understood that the number of signals in a single symbol can be understood as the number of DFT points, or the data length in a single symbol. For example, the number of signals in a single symbol can be 256 or 512, or the number of signals in a single symbol can also be 720.

[0232] In an embodiment of the present application, when the roll-off factor or the first bandwidth in the parameter group is the same, the filter length, symbol rate, oversampling multiple and the number of signals in a single symbol in the parameter group corresponding to the OQAM signal are twice the filter length, symbol rate, oversampling multiple and the number of signals in a single symbol in the parameter group corresponding to the QAM signal.

[0233] In another possible implementation, the first association relationship may set a separate bit in each index to indicate the modulation mode of a single carrier. Exemplarily, each index of the first association relationship may include a first bit and a second bit, the first bit and the second bit being used to jointly indicate the above-mentioned symbol rate, the first parameter, and the cyclic prefix length, and the second bit may also be used to indicate the modulation mode of a single carrier. Exemplarily, in the following Table 4, A indicates that the modulation mode of a single carrier is QAM, and B indicates that the modulation mode of a single carrier is OQAM.

[0234] Table 4 Transmission configuration information table

[0235]

[0236] Exemplarily, when the first index is "0+A", the roll-off factor in the first parameter group can be determined to be 3 based on the "0" in the first bit, and the modulation mode of the first signal can be determined to be QAM, the symbol rate is 983.04MHz, the CP length is 18, and the filter length in the first parameter group is 1.5 based on the second bit "A".

[0237] Exemplarily, when the first index is "3+B", the roll-off factor in the first parameter group can be determined to be 0.5 according to the "3" in the first bit, and the modulation mode of the first signal can be determined to be OQAM, the symbol rate is 1966.08MHz, the CP length is 40, and the filter length in the first parameter group is 7 according to the second bit "B".

[0238] It can be understood that the first bit in the above configuration index can also be used to determine at least one of the sampling frequency, the first bandwidth and the number of symbols per unit time, and the second bit in the above configuration index can also be used to determine at least one of the oversampling multiple, the number of signals in a single symbol and the number of CPs in the symbol.

[0239] For example, when the first index is "4+A", the sampling frequency can be determined to be 3932.16 MHz, the first bandwidth can be 4 GHz, and the number of symbols per unit time can be 585 according to the first bit "4", and the oversampling multiple can be determined to be 3 / 1, the number of signals in a single symbol can be 256, and the number of CPs in the symbol can be 24 according to the second bit "A".

[0240] It can be understood that the above Table 4 can also include a column of transmission parameters for indicating the number of signals in a single symbol, and the correspondence between each configuration index and the transmission parameter can be referred to as shown in Table 3, which is not repeated here.

[0241] In another possible implementation, the network device may carry an identifier for indicating the modulation mode of the first signal in the first information, so that the terminal device can determine the modulation mode of the first signal based on the identifier and determine the corresponding first parameter group in the first association relationship based on the first index. Exemplarily, the identifier may indicate that the modulation mode is QAM through bit "0" and indicate that the modulation mode of the single carrier waveform is "OQAM" through bit "1."

[0242] S720: The terminal device transmits the first signal according to the first parameter group.

[0243] It can be understood that after receiving the above-mentioned first information, the terminal device can determine the first parameter group based on the first index and the first association relationship.

[0244] It is understood that the first information can be used to indicate one or more indexes. For example, if the first association relationship is Table 3, the first information can indicate the configuration index "2" in Table 1, and the terminal device can determine to use the parameter group corresponding to the configuration index "2" based on the first association relationship. Alternatively, the first information can indicate "2" and "3" in Table 1, and the terminal device can use the parameter group corresponding to the configuration index "2" or the parameter group corresponding to "3" based on the first association relationship.

[0245] It can be understood that the embodiment of the present application does not limit the uplink transmission or downlink transmission between the terminal device and the network device.

[0246] As an example and not a limitation, when the terminal device performs uplink transmission with the network device, the terminal device transmitting the first signal according to the first parameter group can be understood as the terminal device sending the first signal according to the first parameter group.

[0247] Specifically, during uplink transmission, the terminal device may employ a single-carrier processing flow to process uplink symbols according to the first parameter set to obtain an uplink signal. It will be appreciated that, in this implementation, the waveform of the uplink signal is a single-carrier waveform. This approach will be described below.

[0248] Correspondingly, the network device may process the uplink signal according to the first parameter group to obtain uplink symbols.

[0249] Specifically, the network device may use a multi-carrier waveform processing process to process the uplink signal according to the transmission parameters corresponding to the first parameter group to obtain uplink symbols. Alternatively, the network device may use a single-carrier waveform processing process to process the uplink signal according to the transmission parameters corresponding to the first parameter group to obtain uplink symbols.

[0250] As an example and not a limitation, when the terminal device performs downlink transmission with the network device, the terminal device transmitting the first signal according to the first parameter group can be understood as the terminal device processing the received first signal according to the first parameter group.

[0251] Specifically, during the downlink transmission process, the network device uses the first association relationship to process the downlink signal to obtain a downlink symbol. The first information is used to indicate the configuration index (i.e., the first index) corresponding to the first parameter group used by the network device. When the terminal device receives the first information and the downlink signal, it can process the downlink signal according to the first parameter group corresponding to the first index to obtain a downlink symbol. When the waveform of the downlink signal is a single-carrier waveform, the terminal device can use a multi-carrier waveform processing flow to process the downlink signal; when the waveform of the downlink signal is a multi-carrier waveform, the terminal device can use a single-carrier waveform processing flow to process the downlink signal.

[0252] Optionally, an embodiment of the present application may define a transmission state in which a network device and a terminal device may perform transmission using a first association relationship. It is understandable that this transmission state is a transmission state defined for a scenario in which a single-carrier waveform and a multi-carrier waveform coexist. In order to distinguish this transmission state from other transmission states, this transmission state may be referred to as a specific transmission state, a low-power transmission state, a single-carrier-multi-carrier transmission state, or a multiplexed transmission state.

[0253] The transmission state is also defined by the network device, and the network device can configure the transmission state for the terminal device. The transmission state can also be pre-configured, that is, the network device and the terminal device can pre-configure the transmission state, for example, configuring the transmission state at the factory.

[0254] In this transmission state, the single-carrier waveform and the multi-carrier waveform can correspond to a set of transmission parameters, which can also be described as corresponding to a set of transceiver mechanisms or transceivers. Then, the transmitting end sends a signal of a single-carrier waveform (i.e., a signal obtained through a single-carrier waveform processing flow), and through this transceiver mechanism, the receiving end can use a multi-carrier waveform processing flow to process the received signal; or, the transmitting end sends a signal of a multi-carrier waveform (i.e., a signal obtained through a multi-carrier waveform processing flow), and through this transceiver mechanism, the receiving end can use a single-carrier waveform processing flow to process the received signal. Among them, the transmitting end can be a terminal device, and the receiving end can be a network device; or, the transmitting end can be a network device, and the receiving end can be a terminal device. In this transmission state, there is no need to deploy a set of transceivers for single-carrier waveforms and multi-carrier waveforms respectively. Only one set of transceivers can be deployed, which can save equipment overhead.

[0255] Based on the above-mentioned transmission state, before sending the above-mentioned first information, the network device may also send third information to the terminal device, where the third information is used to instruct the terminal device to transmit a signal according to the first association relationship. Specifically, it can be used to instruct the terminal device to send an uplink signal according to the first association relationship, or to receive a downlink signal according to the first association relationship. It can be understood that the third information is used to indicate to the terminal device that it can use the first association relationship to transmit a signal, that is, to inform the terminal device to transmit a signal under this transmission state. The third information can be described as specific transmission state indication information, low-power transmission state indication information, single-carrier-multi-carrier transmission state indication information, etc.

[0256] It can be understood that the embodiment of the present application does not limit the specific method in which the network device sends the third information to the terminal device.

[0257] As an example but not limitation, the network device may send the third information to the terminal device via DCI, RRC information, or MAC CE information.

[0258] As an example but not limitation, the network device may send the third information to the terminal device via information broadcast via a physical broadcast channel (PBCH), that is, the network device broadcasts the third information to the terminal devices within its coverage.

[0259] Method 2:

[0260] The terminal device may determine a first cyclic prefix length corresponding to the first parameter group based on the first parameter group and the second association relationship. The first parameter group includes a symbol rate and a first parameter, and the second association relationship includes multiple parameter groups in the first association relationship and the cyclic prefix lengths corresponding to the multiple parameter groups. In other words, after determining the first parameter group based on the first index and the first association relationship, the terminal device may determine the first cyclic prefix length based on the first parameter group and the second association relationship.

[0261] It is understood that the first association relationship and the second association relationship are known to both the network device and the terminal device. For example, the first association relationship and the second association relationship may be pre-configured by the network device and the terminal device at the factory, or the first association relationship and the second association relationship may be pre-defined by a protocol. The following description uses the example of the first association relationship and the second association relationship being pre-defined by the protocol. The first association relationship or the second association relationship may be a separate set pre-defined by the protocol, or a subset of a set pre-defined by the protocol.

[0262] It can be understood that the embodiment of the present application does not limit the specific expression of the first association relationship and the second association relationship. For example, the first association relationship and the second association relationship can be expressed in the form of a table.

[0263] It is understood that the first parameter may include at least one of a roll-off factor of the filter or a length of the filter. Exemplarily, if the first parameter is the roll-off factor of the filter, the first association relationship may be as shown in Table 5, and the second association relationship may be as shown in Table 6.

[0264] Table 5 A transmission configuration information table

[0265]

[0266] Among them, the configuration indexes omitted in Table 5 and their corresponding symbol rates and roll-off factors can be referred to Table 1. Table 5 can also include some index configurations among the 28 index configurations, as well as the symbol rates and roll-off factors corresponding to these index configurations.

[0267] Table 6 A transmission configuration information table

[0268]

[0269] Among them, the combinations of symbol rates and roll-off factors omitted in Table 6 and the CP lengths corresponding to these combinations of symbol rates and roll-off factors can be referred to Table 1. Table 6 may also include the combinations of symbol rates and roll-off factors in the 28 combinations of symbol rates and roll-off factors, as well as the CP lengths corresponding to these combinations of symbol rates and roll-off factors.

[0270] Exemplarily, the first parameter is a roll-off factor of a filter, and the first association relationship may be as shown in Table 7, and the second association relationship may be as shown in Table 8.

[0271] Table 7 A transmission configuration information table

[0272]

[0273]

[0274] Among them, the configuration indexes omitted in Table 7 and their corresponding symbol rates and filter lengths can be referred to Table 2. Table 7 can also include some index configurations among the 28 index configurations, as well as the symbol rates and filter lengths corresponding to these index configurations.

[0275] Table 8: Transmission configuration information table

[0276]

[0277] Among them, the combinations of symbol rates and filter lengths omitted in Table 8 and the CP lengths corresponding to these combinations of symbol rates and filter lengths can be referred to Table 2. Table 8 can also include the combinations of symbol rates and filter lengths among the 28 combinations of symbol rates and filter lengths, as well as the CP lengths corresponding to these combinations of symbol rates and filter lengths.

[0278] It can be understood that the first association relationship in the above-mentioned method B can also include at least one of the sampling frequency, the oversampling multiple, the first bandwidth, the equivalent time length of Cp in the symbol, the number of symbols per unit time, or the number of signals in a single symbol. The specific description of the above-mentioned parameters can be referred to the relevant description in method one, and will not be repeated here.

[0279] It can be understood that the second association relationship in the above-mentioned method B may also include at least one of the sampling frequency, the oversampling multiple, the first bandwidth, the equivalent time length of Cp in the symbol, the number of symbols per unit time, or the number of signals in a single symbol. The specific description of the above-mentioned parameters can be referred to the relevant description in method one, and will not be repeated here.

[0280] It can be understood that the modulation mode of the single carrier determined by the terminal device based on the first association relationship is one of QAM or OQAM, and the embodiment of the present application does not limit the specific form of the modulation mode indicated by the first association relationship. Its specific form can refer to the relevant description of method one, and will not be repeated here.

[0281] It can be understood that in method B, the above step S720 can be replaced by S720b, and the terminal device transmits the first signal according to the first parameter group and the first cyclic prefix length.

[0282] It can be understood that the terminal device can refer to the relevant content in S720 for specific instructions based on the first parameter group and the first cyclic prefix length, which will not be repeated here.

[0283] Based on the above solution, in scenarios where single-carrier waveforms and multi-carrier waveforms coexist, the parameter groups corresponding to the configuration indices included in the first association relationship can be used to process both single-carrier waveforms and multi-carrier waveforms. Both single-carrier and multi-carrier waveforms can use transmission configuration information, which allows devices to transmit and receive signals with lower complexity than using two sets of parameters, while also avoiding the equipment overhead of installing two transceivers.

[0284] The following uses uplink transmission as an example, combining single-carrier waveform processing flow and multi-carrier waveform processing flow to introduce the uplink symbol processing process through Example A and Example B. In the introduction, the single-carrier waveform processing flow takes the processing flow of SC-QAM technology as an example.

[0285] Embodiment A: The first association relationship includes a configuration index and a sampling frequency, a symbol rate, a roll-off factor, and a CP length corresponding to the configuration index.

[0286] Specifically, the first association relationship in embodiment A can be represented by the following Table 9. Table 9 may include 28 configuration indexes. The omitted configuration indexes and the corresponding sampling frequency, symbol rate, and roll-off factor can be found in Table 3. Table 9 may also include some of the 28 configuration indexes, as well as the sampling frequency, symbol rate, roll-off factor, and CP length corresponding to these configuration indexes.

[0287] Table 9 Transmission configuration information table

[0288]

[0289] It is understandable that when the terminal device receives the first information, it can find the sampling frequency, symbol rate, roll-off factor, and CP length corresponding to the first information from Table 9, that is, find the sampling frequency, symbol rate, roll-off factor, and CP length corresponding to the first index indicated by the first information. It is understandable that there is an association between the transmissions corresponding to the various configuration indexes in Table 9, and this association can be implemented by configuring different CP lengths for different filters, thereby alleviating the interference of the filter on the receiver signal processing.

[0290] Figure 8 This is a schematic diagram of the processing flow of the SC-QAM technology provided in an embodiment of the present application.

[0291] It can be understood that the embodiment of the present application does not limit the modulation method of the first signal. Exemplarily, the modulation method of the first signal can be either QAM or OQAM.

[0292] It can be understood that the embodiment of the present application does not limit the specific method of determining the modulation method of the first signal. For specific instructions, please refer to the relevant content in step S710 and will not be repeated here.

[0293] It can be understood that the terminal device can determine the CP length according to the first index and Table 6, and thus add a cyclic prefix according to the CP length.

[0294] For example, when the first index is the configuration index "0", the terminal device can obtain the CP length as 18 according to the table lookup, so that the terminal device can Figure 8 In the process shown, after Nd symbols are obtained through modulation, 18 cyclic prefixes are added to each symbol.

[0295] Furthermore, when the terminal device determines the roll-off factor indicated by the first information according to Table 9, the filter coefficient can be generated according to a predefined filter shaping formula to determine the filter shape. The filter takes a root raised cosine (RRC) filter as an example, and its filter shaping formula is:

[0296]

[0297] Wherein, Ts represents the symbol rate, i.e., Fc mentioned above. It is understood that the type of filter is known to both the network device and the terminal device, and the embodiments of the present application do not limit the type of filter. For example, the filter may be an RRC filter, or the filter may be a square root raised cosine filter or a Kaiser window filter. It is understood that regardless of the type of filter used, filter coefficients need to be generated based on the roll-off factor to determine the filter shape.

[0298] Exemplarily, the first index indicated by the first information is the configuration index "0", then the terminal device can obtain the symbol rate of 983.04MHz and the roll-off factor of 3 by looking up the table, and then substitute the symbol rate and roll-off factor into the above formula to determine the filtering shape.

[0299] Continue to see Figure 8 After adding the cyclic prefix, the Nd uplink symbols are upsampled by M times to obtain M*Nd sampling points, then pulse-shaped to obtain M*Nd sampling points, and then downsampled by L times to obtain Ns sampling points. Where Ns = Nd*M / L, M and L are positive integers. If L = 1, then Figure 8 The process shown does not include downsampling; if L is greater than 1, then Figure 8 The process shown includes downsampling.

[0300] Figure 8 The effect of pulse shaping in the frequency domain can be understood as spectrum shaping, so pulse shaping can be understood as filtering. When filtering, the filter shape is determined according to the roll-off factor corresponding to the first index indicated by the first information. It can be understood that when the terminal device determines the symbol rate and the roll-off factor based on the configuration index, it can obtain the bandwidth actually used by the transmission signal (i.e., the first bandwidth), the transmission bandwidth, and the extended bandwidth. For example, the symbol rate corresponding to the configuration index "0" is 983.04MHz, and the roll-off factor is 3, then the extended bandwidth can be determined to be 983.04*3≈3000MHz, thereby determining the first bandwidth to be 983.04+3000≈4000MHz, that is, the first bandwidth is 4GHz.

[0301] Optionally, Table 9 may further include a column for indicating the equivalent duration of the CP at the symbol rate, that is, the first association relationship also includes an association relationship among the roll-off factor, the CP length, and the equivalent duration of the CP at the symbol rate.

[0302] In an embodiment of the present application, the signal obtained by processing the transmission processing flow of a single-carrier waveform can be described as a signal sent with a single-carrier waveform, or a signal obtained by processing with a low-complexity processing flow, or a signal sent without frequency domain processing, etc.

[0303] It can be understood that the embodiment of the present application does not limit the specific process of the network device processing the first signal.

[0304] As an example and not a limitation, after receiving the first signal, the network device may use Figure 8 The receiving process corresponding to the single-carrier waveform sending process shown processes the first signal.

[0305] As an example and not a limitation, after receiving the first signal, the network device may use Figure 9The multi-carrier (eg DFT-s-OFDM) receiving process shown in FIG. Figure 9 As shown, the multi-carrier receiving process may include processes such as cyclic prefix removal, FFT, subcarrier mapping, IDFT, and demodulation.

[0306] Based on the above solution, the terminal device can obtain the roll-off factor and CP length corresponding to a certain configuration index by querying Table 9, determine the cyclic prefix length and filtered waveform to be added, and send a single carrier waveform.

[0307] Embodiment B: The first association relationship includes a configuration index and a sampling frequency, a symbol rate, a filter length, and a CP length corresponding to the configuration index.

[0308] Specifically, the first association relationship in embodiment B can be represented by the following Table 10. Table 10 may include 28 configuration indexes. The omitted configuration indexes and the corresponding sampling frequency, symbol rate, and roll-off factor can be found in Table 3. Table 10 may also include some of the 28 configuration indexes, as well as the sampling frequency, symbol rate, filter length, and CP length corresponding to these configuration indexes.

[0309] Table 10 Transmission configuration information table

[0310]

[0311] It is understandable that when the terminal device receives the first information, it can find the sampling frequency, symbol rate, filter length, and CP length corresponding to the first information from Table 10, that is, find the sampling frequency, symbol rate, filter length, and CP length corresponding to the first index indicated by the first information. It is understandable that there is an association between the transmissions corresponding to the various configuration indexes in Table 10, and this association can be implemented as different filters configured with different CP lengths to alleviate the interference of the filter on the receiver signal processing.

[0312] It can be understood that the terminal device can determine the cyclic prefix length based on the first index and Table 10 and add a cyclic prefix of equivalent duration for each modulated symbol. The specific method can refer to the relevant instructions in Example A and will not be repeated here.

[0313] It is understood that the terminal device can also determine the filter length according to the first index and Table 10, thereby determining the filter shape according to the filter length and the symbol rate. Exemplarily, the terminal device can generate a Hanning filter with a filter length of L, and the filter with a filter length of L can be generated using the following formula (2):

[0314]

[0315] where ω0(x) is sampled at the symbol rate.

[0316] Furthermore, the terminal device can obtain the filter shape corresponding to the filter according to the symbol rate as follows:

[0317]

[0318] Where L is the filter length and f is the frequency domain sampling interval, i.e. f = symbol rate * upsampling factor.

[0319] Furthermore, the terminal device performs spectrum shaping (ie, filtering) on the symbols after upsampling according to the obtained filter shape. The specific process can be referred to the relevant description in Example A and will not be repeated here.

[0320] Optionally, Table 10 may further include a column for indicating the equivalent duration of the CP at the symbol rate, that is, the first association relationship also includes an association relationship among the filter duration, the CP length, and the equivalent duration of the CP at the symbol rate.

[0321] Based on the above solution, the terminal device can obtain the filter length and CP length corresponding to a certain configuration index by querying Table 10, determine the cyclic prefix length and filtering waveform to be added, and send a single carrier waveform.

[0322] Finally, the device embodiment of the embodiment of the present application is introduced.

[0323] To implement the various functions of the methods provided herein, both the terminal device and the network device may include hardware structures and / or software modules, with the aforementioned functions implemented in the form of hardware structures, software modules, or a combination of hardware structures and software modules. Whether a particular function is implemented in the form of hardware structures, software modules, or a combination of hardware structures and software modules depends on the specific application and design constraints of the technical solution.

[0324] Figure 10 1 is a schematic block diagram of a communication device 1000 according to an embodiment of the present application. The communication device 1000 includes a processor 1010 and a communication interface 1020, which may be interconnected via a bus 1030. The communication device 1000 may be a terminal device or a network device.

[0325] Optionally, the communication device 1000 may further include a memory 1040. The memory 1040 includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or portable read-only memory (CD-ROM), and is used for related instructions and data.

[0326] The processor 1010 may be one or more central processing units (CPUs). In the case where the processor 1010 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

[0327] When the communication apparatus 1000 is a terminal device, illustratively, the processor 1010 is configured to perform the following operations: determine a first parameter group according to the first association relationship and the first index; and send a first signal according to the first parameter group.

[0328] When the communication apparatus 1000 is a network device, illustratively, the processor 1010 is configured to perform the following operations: sending a first index corresponding to a first parameter group according to a first association relationship; receiving a first signal according to the first parameter group, etc.

[0329] The above contents are described as examples only. The communication device 1000 is a terminal device or a network device, which is responsible for executing the methods or steps related to the terminal device or the network device in the above method embodiments.

[0330] The above description is merely an example description. For details, please refer to the contents shown in the above method embodiment. Figure 10 The implementation of each operation in can also refer to Figure 7-Figure 9 The corresponding description of the method embodiment shown.

[0331] Figure 11 1 is a schematic block diagram of a communication device 1100 according to an embodiment of the present application. The communication device 1100 may be a terminal device or a network device, or a chip or module in the terminal device or the network device, for implementing the methods involved in the above embodiments.

[0332] Communication device 1100 includes a transceiver unit 1110 and a processing unit 1120. Transceiver unit 1110 may include a transmitting unit and a receiving unit. The transmitting unit is configured to perform a transmitting operation of the communication device, and the receiving unit is configured to perform a receiving operation of the communication device. For ease of description, this embodiment of the application combines the transmitting unit and the receiving unit into a single transceiver unit. This is described here as a unified description and will not be repeated later.

[0333] When the communication device 1100 is a terminal device, illustratively, the transceiver unit 1110 is configured to transmit a first signal. The processing unit 1120 is configured to execute the processing, coordination, and other steps of the terminal device. For example, the processing unit 1120 is configured to determine a first parameter group based on the first association relationship and the first index.

[0334] When communication device 1100 is a network device, illustratively, transceiver unit 1110 is configured to receive a first signal. Processing unit 1120 is configured to execute steps such as processing and coordination associated with the network device. For example, processing unit 1120 may be configured to transmit a first index corresponding to a first parameter group based on a first association relationship, receive a first signal based on the first parameter group, and so on.

[0335] The above contents are described as examples only. The communication device 1100 is a terminal device or a network device, which is responsible for executing the methods or steps related to the terminal device or the network device in the above method embodiments.

[0336] Optionally, the communication device 1100 further includes a storage unit 1130, which is used to store a program or code for executing the aforementioned method.

[0337] Figure 10 and Figure 11 The device embodiment shown is for implementing Figure 7-Figure 9 The content described. Figure 10 and Figure 11 The specific execution steps and methods of the device shown can refer to the contents described in the aforementioned method embodiment.

[0338] Figure 12 1 is a schematic block diagram of a communication device 1200 according to an embodiment of the present application. The communication device 1200 is used to implement the functions of a terminal device or a network device. The communication device 1200 may be a chip in the terminal device or the network device.

[0339] Communication device 1200 includes an input / output interface 1220 and a processor 1210. Input / output interface 1220 may be an input / output circuit. Processor 1210 may be a signal processor, a chip, or other integrated circuit capable of implementing the method of the present application. Input / output interface 1220 is used for inputting or outputting signals or data.

[0340] Exemplarily, when the communication device 1200 is a terminal device, the input / output interface 1220 is configured to receive the first information. The processor 1210 is configured to determine the first parameter group based on the first association relationship and the first index. The processor 1210 is also configured to execute some or all of the steps of any method provided herein.

[0341] Exemplarily, the communication device 1200 is a network device, and the input / output interface 1220 is used to send the first information. The processor 1210 is used to execute some or all steps of any method provided in this application, for example, processing the first signal.

[0342] In one possible implementation, the processor 1210 implements the functions implemented by the terminal device or the network device by executing instructions stored in the memory.

[0343] Optionally, the communication device 1200 further includes a memory.

[0344] Optionally, the processor and memory are integrated together.

[0345] Optionally, the memory is outside the communication device 1200 .

[0346] In one possible implementation, the processor 1210 may be a logic circuit, which inputs / outputs messages or signals through the input / output interface 1220. The logic circuit may be a signal processor, a chip, or other integrated circuit that can implement the method of the embodiment of the present application.

[0347] The above description of the communication device 1200 is only used as an example. The communication device 1200 can be used to execute the method described in the above embodiments. For specific content, please refer to the description of the above method embodiments, which will not be repeated here.

[0348] Figure 13 1 is a schematic block diagram of a communication device 1300 according to an embodiment of the present application. The communication device 1300 may be a network device or a chip. The communication device 1300 is used to perform the above Figure 7-Figure 9 The operations in the illustrated method embodiment are performed by a network device.

[0349] When the communication device 1300 is a network device, for example, a base station. Figure 13A simplified schematic diagram of the base station structure is shown. The base station includes module 1310, module 1320 and module 1330. Module 1310 is mainly used for baseband processing, controlling the base station, etc.; module 1310 is usually the control center of the base station, which can be usually called a processor, and is used to control the base station to perform the processing operations on the network device side in the above method embodiment. Module 1320 is mainly used to store computer program code and data. Module 1330 is mainly used for receiving and transmitting radio frequency signals and converting radio frequency signals into baseband signals; module 1330 can usually be called a transceiver module, a transceiver, a transceiver circuit, or a transceiver, etc. The transceiver module of module 1330 can also be called a transceiver or a transceiver, etc., which includes an antenna 1333 and a radio frequency circuit ( Figure 13 Not shown), wherein the radio frequency circuit is mainly used for radio frequency processing.

[0350] Alternatively, the device for implementing the receiving function in module 1330 may be considered a receiver, and the device for implementing the transmitting function may be considered a transmitter, that is, module 1330 includes a receiver 1332 and a transmitter 1331. The receiver may also be referred to as a receiving module, a receiver, or a receiving circuit, and the transmitter may be referred to as a transmitting module, a transmitter, or a transmitting circuit.

[0351] Modules 1310 and 1320 may include one or more boards, each of which may include one or more processors and one or more memories. The processor is used to read and execute programs in the memory to implement baseband processing functions and control the base station. If multiple boards are present, the boards may be interconnected to enhance processing capabilities. As an optional implementation, multiple boards may share one or more processors, multiple boards may share one or more memories, or multiple boards may simultaneously share one or more processors.

[0352] For example, in one implementation, the transceiver module of module 1330 is used to perform Figure 7-Figure 9 In the embodiment shown, the network device performs the related processes of sending and receiving. The processor of module 1310 is used to perform Figure 7-Figure 9 The illustrated embodiment relates to processes performed by network devices.

[0353] Figure 13 This is for example only and not for limitation. The network devices including the processor, memory and transceiver mentioned above may not rely on Figures 10 to 12 The structure shown.

[0354] When communication device 1300 is a chip, the chip includes a transceiver, memory, and a processor. The transceiver can be an input / output circuit or a communication interface; the processor can be a processor, microprocessor, or integrated circuit integrated on the chip. In the above method embodiments, the network device's sending operation can be understood as the chip's output, and the network device's receiving operation can be understood as the chip's input.

[0355] Figure 14 1 is a schematic block diagram of a communication device 1400 according to an embodiment of the present application. The communication device 1400 may be a terminal device, a processor or a chip of the terminal device. The communication device 1400 may be used to perform the operations performed by the terminal device in the above method embodiment.

[0356] When the communication device 1400 is a terminal device, Figure 14 FIG. 1 shows a simplified schematic diagram of the structure of a terminal device. Figure 14 As shown, the terminal device includes a processor, a memory, and a transceiver. The memory can store computer program code, and the transceiver includes a transmitter 1431, a receiver 1432, a radio frequency circuit ( Figure 14 Not shown), antenna 1433 and input / output device ( Figure 14 not shown).

[0357] The processor is primarily used to process communication protocols and communication data, control terminal devices, execute software programs, and process software program data. Memory is primarily used to store software programs and data. Radio frequency circuits are primarily used to convert baseband signals into radio frequency signals and process radio frequency signals. Antennas are primarily used to transmit and receive radio frequency signals in the form of electromagnetic waves. Input / output devices. For example, touch screens, displays, and keyboards are primarily used to receive user input and output data to the user. It should be noted that some types of terminal devices may not have input / output devices.

[0358] When data needs to be sent, the processor performs baseband processing on the data to be transmitted and outputs the baseband signal to the RF circuit. The RF circuit then performs RF processing on the baseband signal and transmits it via the antenna in the form of electromagnetic waves. When data is sent to a terminal device, the RF circuit receives the RF signal via the antenna, converts it into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes it.

[0359] For ease of explanation, Figure 14Only one memory, processor, and transceiver are shown. In actual terminal devices, one or more processors and one or more memories may exist. A memory may also be referred to as a storage medium or storage device. The memory may be independent of the processor or integrated with the processor, and this is not limited in the present embodiment.

[0360] In the embodiment of the present application, the antenna and radio frequency circuit with transceiver functions can be regarded as the transceiver module of the terminal device, and the processor with processing function can be regarded as the processing module of the terminal device.

[0361] like Figure 14 As shown, the terminal device includes a processor 1410, a memory 1420, and a transceiver 1430. The processor 1410 can be called a processing unit, a processing board, a processing module, a processing device, etc., and the transceiver 1430 can also be called a transceiver unit, a transceiver, a transceiver device, etc.

[0362] Alternatively, the device implementing the receiving function in transceiver 1430 may be considered a receiving module, and the device implementing the transmitting function in transceiver 1430 may be considered a transmitting module. That is, transceiver 1430 includes a receiver and a transmitter. A transceiver may also be sometimes referred to as a transceiver, a transceiver module, or a transceiver circuit. A receiver may also be sometimes referred to as a receiver, a receiving module, or a receiving circuit. A transmitter may also be sometimes referred to as a transmitter, a transmitting module, or a transmitting circuit.

[0363] For example, in one implementation, the processor 1410 is configured to execute Figure 7-Figure 9 In the embodiment shown, the terminal device performs the processing action, and the transceiver 1430 is used to perform Figure 7-Figure 9 The sending and receiving actions of the terminal device.

[0364] Figure 14 This is only an example and not a limitation. The terminal device including the transceiver module and the processing module may not rely on Figures 10 to 12 The structure shown.

[0365] When the communication device 1400 is a chip, the chip includes a processor, a memory, and a transceiver. The transceiver can be an input / output circuit or a communication interface; the processor can be a processing module, a microprocessor, or an integrated circuit integrated on the chip.

[0366] The sending operation of the terminal device in the above method embodiment can be understood as the output of the chip, and the receiving operation of the terminal device in the above method embodiment can be understood as the input of the chip.

[0367] The present application also provides a chip, including a processor, for calling and executing instructions stored in a memory from the memory, so that a communication device equipped with the chip executes the methods in the above examples.

[0368] The present application also provides another chip, comprising: an input interface, an output interface, and a processor, wherein the input interface, the output interface, and the processor are connected via an internal connection path, and the processor is configured to execute code in a memory. When the code is executed, the processor is configured to execute the methods in the above examples. Optionally, the chip also includes a memory, which is configured to store computer programs or code.

[0369] The present application also provides a processor for coupling with a memory, and for executing the methods and functions involving a network device or a terminal device in any of the above embodiments.

[0370] In another embodiment of the present application, a computer program product including instructions is provided. When the computer program product is run on a computer, the method of the above embodiment is implemented.

[0371] The present application also provides a computer program. When the computer program is executed in a computer, the method of the aforementioned embodiment is implemented.

[0372] In another embodiment of the present application, a computer-readable storage medium is provided, which stores a computer program. When the computer program is executed by a computer, the method described in the above embodiment is implemented.

[0373] 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.

[0374] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0375] In the several embodiments provided in this application, 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 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.

[0376] Units described as separate components may or may not be physically separate, and 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.

[0377] 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.

[0378] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application, or the part that contributes to the current technology 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 (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments 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.

[0379] 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: receiving first information, where the first information is used to indicate a first index corresponding to a first signal, the first index is used to indicate a first parameter group in a first association relationship, the first association relationship includes multiple indexes and multiple parameter groups corresponding to the multiple indexes, the first parameter group is a parameter group associated with the first index, the parameter group includes a symbol rate, a first parameter, and a cyclic prefix length, wherein the first parameter is a parameter of a filter used to transmit the first signal, and the cyclic prefix length is a length of a cyclic prefix included in each symbol in the first signal; The first signal is transmitted according to the first parameter set.

2. The method according to claim 1, characterized in that The modulation mode corresponding to at least one parameter group among the multiple parameter groups is quadrature amplitude modulation or offset quadrature amplitude modulation, and the first parameter includes at least one of a roll-off factor of the filter or a length of the filter.

3. The method according to claim 2, characterized in that The first parameter includes the length of the filter, and the longer the length of the filter is, the larger the cyclic prefix length is.

4. The method according to claim 2 or 3, characterized in that The modulation mode corresponding to at least one parameter group among the multiple parameter groups is quadrature amplitude modulation, the first parameter in the at least one parameter group includes a roll-off factor of the filter, and the at least one parameter group satisfies at least one of the following: The symbol rate is 983.04 MHz and the roll-off factor is 3, the cyclic prefix length is 18, or The symbol rate is 983.04 MHz and the roll-off factor is 2, the cyclic prefix length is 18, or The symbol rate is 983.04 MHz and the roll-off factor is 1, the cyclic prefix length is 18, or The symbol rate is 983.04 MHz and the roll-off factor is 0.5, the cyclic prefix length is 20, or The symbol rate is 1310.7 MHz and the roll-off factor is 2, the cyclic prefix length is 24, or The symbol rate is 1310.7 MHz and the roll-off factor is 1.25, the cyclic prefix length is 24, or The symbol rate is 1310.7 MHz and the roll-off factor is 0.5, the cyclic prefix length is 26, or The symbol rate is 1966.08 MHz and the roll-off factor is 1, the cyclic prefix length is 35, or The symbol rate is 1966.08 MHz and the roll-off factor is 0.5, the cyclic prefix length is 36, or The symbol rate is 1966.08 MHz and the roll-off factor is 0.25, the cyclic prefix length is 39, or The symbol rate is 2621.4 MHz and the roll-off factor is 0.5, the cyclic prefix length is 49, or The symbol rate is 2621.4 MHz and the roll-off factor is 0.125, the cyclic prefix length is 53, or The symbol rate is 2949.12 MHz and the roll-off factor is 0.33, the cyclic prefix length is 54, or The symbol rate is 2949.12 MHz, the roll-off factor is 0.125, and the cyclic prefix length is 58.

5. The method according to any one of claims 2 to 4, characterized in that The modulation mode corresponding to at least one parameter group among the multiple parameter groups is quadrature amplitude modulation, the first parameter in the at least one parameter group includes the length of the filter, and the at least one parameter group satisfies at least one of the following: The symbol rate is 983.04 MHz and the filter length is 1.5, the cyclic prefix length is 18, or The symbol rate is 983.04 MHz and the filter length is 3.5, the cyclic prefix length is 20, or The symbol rate is 1310.7 MHz and the filter length is 1.5, the cyclic prefix length is 24, or The symbol rate is 1310.7 MHz and the filter length is 3.5, the cyclic prefix length is 26, or The symbol rate is 1966.08 MHz and the filter length is 1.5, the cyclic prefix length is 35, or The symbol rate is 1966.08 MHz and the filter length is 3.5, the cyclic prefix length is 36, or The symbol rate is 1966.08 MHz and the filter length is 5.5, the cyclic prefix length is 39, or The symbol rate is 2621.4 MHz and the filter length is 4.5, the cyclic prefix length is 49, or The symbol rate is 2621.4 MHz and the filter length is 8.5, the cyclic prefix length is 53, or The symbol rate is 2949.12 MHz and the filter length is 4.5, the cyclic prefix length is 54, or The symbol rate is 2949.12 MHz, the filter length is 8.5, and the cyclic prefix length is 58.

6. The method according to claim 2 or 3, characterized in that The modulation mode corresponding to at least one parameter group among the multiple parameter groups is offset quadrature amplitude modulation, the first parameter in the at least one parameter group includes a roll-off factor of the filter, and the at least one parameter group satisfies at least one of the following: The symbol rate is 983.04 MHz and the roll-off factor is 3, the cyclic prefix length is 36, or The symbol rate is 983.04 MHz and the roll-off factor is 2, the cyclic prefix length is 36, or The symbol rate is 983.04 MHz and the roll-off factor is 1, the cyclic prefix length is 36, or The symbol rate is 983.04 MHz and the roll-off factor is 0.5, the cyclic prefix length is 40, or The symbol rate is 1310.7 MHz and the roll-off factor is 2, the cyclic prefix length is 48, or The symbol rate is 1310.7 MHz and the roll-off factor is 1.25, the cyclic prefix length is 48, or The symbol rate is 1310.7 MHz and the roll-off factor is 0.5, the cyclic prefix length is 52, or The symbol rate is 1966.08 MHz and the roll-off factor is 1, the cyclic prefix length is 70, or The symbol rate is 1966.08 MHz and the roll-off factor is 0.5, the cyclic prefix length is 72, or The symbol rate is 1966.08 MHz and the roll-off factor is 0.25, the cyclic prefix length is 78, or The symbol rate is 2621.4 MHz and the roll-off factor is 0.5, the cyclic prefix length is 98, or The symbol rate is 2621.4 MHz and the roll-off factor is 0.125, the cyclic prefix length is 106, or The symbol rate is 2949.12 MHz and the roll-off factor is 0.33, the cyclic prefix length is 108, or The symbol rate is 2949.12 MHz, the roll-off factor is 0.125, and the cyclic prefix length is 116.

7. The method according to claim 2, 3 or 6, characterized in that: The modulation mode corresponding to at least one parameter group among the multiple parameter groups is offset quadrature amplitude modulation, the first parameter in the at least one parameter group includes the length of the filter, and the at least one parameter group satisfies at least one of the following: The symbol rate is 983.04 MHz and the filter length is 3, the cyclic prefix length is 36, or The symbol rate is 983.04 MHz and the filter length is 7, the cyclic prefix length is 40, or The symbol rate is 1310.7 MHz and the filter length is 3, the cyclic prefix length is 48, or The symbol rate is 1310.7 MHz and the filter length is 7, the cyclic prefix length is 52, or The symbol rate is 1966.08 MHz and the filter length is 3, the cyclic prefix length is 70, or The symbol rate is 1966.08 MHz and the filter length is 7, the cyclic prefix length is 72, or The symbol rate is 1966.08 MHz and the filter length is 11, the cyclic prefix length is 78, or The symbol rate is 2621.4 MHz and the filter length is 9, the cyclic prefix length is 98, or The symbol rate is 2621.4 MHz and the filter length is 17, the cyclic prefix length is 106, or The symbol rate is 2949.12 MHz and the filter length is 9, the cyclic prefix length is 108, or The symbol rate is 2949.12 MHz, the filter length is 17, and the cyclic prefix length is 116.

8. The method according to any one of claims 1 to 7, characterized in that At least one parameter group among the multiple parameter groups includes a third parameter, where the third parameter is an equivalent duration corresponding to the cyclic prefix length, and the cyclic prefix length and the third parameter satisfy one of the following: The cyclic prefix length is 20 or 40, the third parameter is 20.3ns, or The cyclic prefix length is 53 or 106, the third parameter is 20.3ns, or The cyclic prefix length is any one of 26, 52, 39 or 78, and the third parameter is 19.8 ns, or The cyclic prefix length is 58 or 116, the third parameter is 19.6ns, or The cyclic prefix length is 49 or 98, the third parameter is 18.6ns, or The cyclic prefix length is any one of 18, 24, 36, 48, 54 or 72, and the third parameter is 18.3 ns, or The cyclic prefix length is 35 or 70, and the third parameter is 17.6 ns.

9. The method according to any one of claims 1 to 8, characterized in that At least one parameter group among the multiple parameter groups also includes at least one of a sampling frequency, an oversampling multiple, a first bandwidth, a fourth parameter or a fifth parameter, the oversampling multiple is the ratio of the sampling frequency to the symbol rate, the first bandwidth is the bandwidth used to transmit the first signal, the fourth bandwidth is the number of signals in each symbol of the first signal, and the fifth parameter is the number of symbols of the first signal transmitted per unit time.

10. The method according to any one of claims 1 to 9, characterized in that Before receiving the first information, the method further includes: Sending second information, where the second information is used to indicate that the terminal device supports the use of a single carrier waveform to transmit signals, or the second information is used to request the use of a single carrier waveform to transmit signals.

11. A signal transmission method, characterized in that: The method comprises: receiving first information, where the first information is used to indicate a first index corresponding to a first signal, the first index is used to indicate a first parameter group in a first association relationship, the first association relationship includes multiple indexes and multiple parameter groups corresponding to the multiple indexes, the first parameter group is a parameter group associated with the first index, the parameter group includes a symbol rate and a first parameter, and the first parameter is a parameter of a filter used to transmit the first signal, wherein: The first parameter group is used to indicate a first cyclic prefix length in a second association relationship, the second association relationship includes the multiple parameter groups and multiple cyclic prefix lengths corresponding to the multiple parameter groups, the first cyclic prefix length is the cyclic prefix length associated with the first parameter group, and the first cyclic prefix length is the length of a cyclic prefix included in each symbol in the first signal; The first signal is transmitted according to the first parameter set and the first cyclic prefix length.

12. The method according to claim 11, characterized in that The modulation mode corresponding to the first parameter group is quadrature amplitude modulation or offset quadrature amplitude modulation, and the first parameter includes at least one of a roll-off factor of the filter or a length of the filter.

13. The method according to claim 12, characterized in that The first parameter includes the length of the filter, and the longer the length of the filter is, the larger the first cyclic prefix length is.

14. The method according to claim 12 or 13, characterized in that The modulation mode corresponding to the first parameter group is quadrature amplitude modulation and the first parameter includes a roll-off factor of the filter, and the second association relationship includes at least one of the following: The symbol rate is 983.04 MHz and the roll-off factor is 3, the cyclic prefix length is 18, or The symbol rate is 983.04 MHz and the roll-off factor is 2, the cyclic prefix length is 18, or The symbol rate is 983.04 MHz and the roll-off factor is 1, the cyclic prefix length is 18, or The symbol rate is 983.04 MHz and the roll-off factor is 0.5, the cyclic prefix length is 20, or The symbol rate is 1310.7 MHz and the roll-off factor is 2, the cyclic prefix length is 24, or The symbol rate is 1310.7 MHz and the roll-off factor is 1.25, the cyclic prefix length is 24, or The symbol rate is 1310.7 MHz and the roll-off factor is 0.5, the cyclic prefix length is 26, or The symbol rate is 1966.08 MHz and the roll-off factor is 1, the cyclic prefix length is 35, or The symbol rate is 1966.08 MHz and the roll-off factor is 0.5, the cyclic prefix length is 36, or The symbol rate is 1966.08 MHz and the roll-off factor is 0.25, the cyclic prefix length is 39, or The symbol rate is 2621.4 MHz and the roll-off factor is 0.5, the cyclic prefix length is 49, or The symbol rate is 2621.4 MHz and the roll-off factor is 0.125, the cyclic prefix length is 53, or The symbol rate is 2949.12 MHz and the roll-off factor is 0.33, the cyclic prefix length is 54, or The symbol rate is 2949.12 MHz, the roll-off factor is 0.125, and the cyclic prefix length is 58.

15. The method according to any one of claims 12 to 14, characterized in that The modulation mode corresponding to the first parameter group is quadrature amplitude modulation and the first parameter includes the length of the filter, and the second association relationship includes at least one of the following: The symbol rate is 983.04 MHz and the filter length is 1.5, the cyclic prefix length is 18, or The symbol rate is 983.04 MHz and the filter length is 3.5, the cyclic prefix length is 20, or The symbol rate is 1310.7 MHz and the filter length is 1.5, the cyclic prefix length is 24, or The symbol rate is 1310.7 MHz and the filter length is 3.5, the cyclic prefix length is 26, or The symbol rate is 1966.08 MHz and the filter length is 1.5, the cyclic prefix length is 35, or The symbol rate is 1966.08 MHz and the filter length is 3.5, the cyclic prefix length is 36, or The symbol rate is 1966.08 MHz and the filter length is 5.5, the cyclic prefix length is 39, or The symbol rate is 2621.4 MHz and the filter length is 4.5, the cyclic prefix length is 49, or The symbol rate is 2621.4 MHz and the filter length is 8.5, the cyclic prefix length is 53, or The symbol rate is 2949.12 MHz and the filter length is 4.5, the cyclic prefix length is 54, or The symbol rate is 2949.12 MHz, the filter length is 8.5, and the cyclic prefix length is 58.

16. The method according to claim 12 or 13, characterized in that The modulation mode corresponding to the first parameter group is offset quadrature amplitude modulation, and the first parameter includes a roll-off factor of the filter, and the second association relationship includes at least one of the following: The symbol rate is 983.04 MHz and the roll-off factor is 3, the cyclic prefix length is 36, or The symbol rate is 983.04 MHz and the roll-off factor is 2, the cyclic prefix length is 36, or The symbol rate is 983.04 MHz and the roll-off factor is 1, the cyclic prefix length is 36, or The symbol rate is 983.04 MHz and the roll-off factor is 0.5, the cyclic prefix length is 40, or The symbol rate is 1310.7 MHz and the roll-off factor is 2, the cyclic prefix length is 48, or The symbol rate is 1310.7 MHz and the roll-off factor is 1.25, the cyclic prefix length is 48, or The symbol rate is 1310.7 MHz and the roll-off factor is 0.5, the cyclic prefix length is 52, or The symbol rate is 1966.08 MHz and the roll-off factor is 1, the cyclic prefix length is 70, or The symbol rate is 1966.08 MHz and the roll-off factor is 0.5, the cyclic prefix length is 72, or The symbol rate is 1966.08 MHz and the roll-off factor is 0.25, the cyclic prefix length is 78, or The symbol rate is 2621.4 MHz and the roll-off factor is 0.5, the cyclic prefix length is 98, or The symbol rate is 2621.4 MHz and the roll-off factor is 0.125, the cyclic prefix length is 106, or The symbol rate is 2949.12 MHz and the roll-off factor is 0.33, the cyclic prefix length is 108, or The symbol rate is 2949.12 MHz, the roll-off factor is 0.125, and the cyclic prefix length is 116.

17. The method according to claim 12, 13 or 16, characterized in that The modulation mode corresponding to the first parameter group is offset quadrature amplitude modulation, and the first parameter includes the length of the filter. The second association relationship includes at least one of the following: The symbol rate is 983.04 MHz and the filter length is 3, the cyclic prefix length is 36, or The symbol rate is 983.04 MHz and the filter length is 7, the cyclic prefix length is 40, or The symbol rate is 1310.7 MHz and the filter length is 3, the cyclic prefix length is 48, or The symbol rate is 1310.7 MHz and the filter length is 7, the cyclic prefix length is 52, or The symbol rate is 1966.08 MHz and the filter length is 3, the cyclic prefix length is 70, or The symbol rate is 1966.08 MHz and the filter length is 7, the cyclic prefix length is 72, or The symbol rate is 1966.08 MHz and the filter length is 11, the cyclic prefix length is 78, or The symbol rate is 2621.4 MHz and the filter length is 9, the cyclic prefix length is 98, or The symbol rate is 2621.4 MHz and the filter length is 17, the cyclic prefix length is 106, or The symbol rate is 2949.12 MHz and the filter length is 9, the cyclic prefix length is 108, or The symbol rate is 2949.12 MHz, the filter length is 17, and the cyclic prefix length is 116.

18. The method according to any one of claims 11 to 17, characterized in that The second association relationship further includes a third parameter, where the third parameter is an equivalent duration of the cyclic prefix length, and the cyclic prefix length and the third parameter satisfy one of the following: The cyclic prefix length is 20 or 40, the third parameter is 20.3ns, or The cyclic prefix length is 53 or 106, the third parameter is 20.3ns, or The cyclic prefix length is any one of 26, 52, 39 or 78, and the third parameter is 19.8 ns, or The cyclic prefix length is 58 or 116, the third parameter is 19.6ns, or The cyclic prefix length is 49 or 98, the third parameter is 18.6ns, or The cyclic prefix length is any one of 18, 24, 36, 48, 54 or 72, and the third parameter is 18.3 ns, or The cyclic prefix length is 35 or 70, and the third parameter is 17.6 ns.

19. The method according to any one of claims 11 to 18, characterized in that At least one parameter group among the multiple parameter groups also includes at least one of a sampling frequency, an oversampling multiple, a first bandwidth, a fourth parameter or a fifth parameter, the oversampling multiple is the ratio of the sampling frequency to the symbol rate, the first bandwidth is the bandwidth used to transmit the first signal, the fourth bandwidth is the number of signals in each symbol of the first signal, and the fifth parameter is the number of symbols of the first signal transmitted per unit time.

20. The method according to any one of claims 11 to 19, characterized in that Before receiving the first information, the method further includes: Sending second information, where the second information is used to indicate that the terminal device supports the use of a single carrier waveform to transmit signals, or the second information is used to request the use of a single carrier waveform to transmit signals.

21. A signal transmission device, characterized in that: Used to implement the method according to any one of claims 1 to 10, or used to implement the method according to any one of claims 11 to 20.

22. A signal transmission device, characterized in that: comprising a processor configured to, by executing computer programs or instructions, or by executing logic circuits, causing the communication device to perform the method according to any one of claims 1 to 10; or, The communication device is caused to execute the method according to any one of claims 11 to 20.

23. The signal transmission device according to claim 22, characterized in that: The signal transmission device further comprises a memory, which is used to store the computer program or instructions.

24. The signal transmission device according to claim 22 or 23, characterized in that: The signal transmission device further includes a communication interface, which is used to input and / or output signals.

25. A signal transmission device, characterized in that: It includes a logic circuit and an input / output interface, wherein the input / output interface is used to input and / or output signals. The logic circuit is configured to execute the method according to any one of claims 1 to 10; or The logic circuit is configured to execute the method according to any one of claims 11 to 20.

26. A computer-readable storage medium, characterized in that The computer readable storage medium stores a computer program or instruction. When the computer program or instruction is executed on a computer, causing the method of any one of claims 1 to 10 to be performed; or, The method according to any one of claims 11 to 20 is performed.

27. A computer program product, characterized in that Contains instructions that, when executed on a computer, causing the method of any one of claims 1 to 10 to be performed; or, The method according to any one of claims 11 to 20 is performed.

28. A signal transmission method, characterized in that: include: The terminal device executes the method according to any one of claims 1 to 10; The network device executes the method according to any one of claims 11 to 20.

29. A signal transmission system, characterized in that: The method comprises a terminal device and a network device, wherein the terminal device is used to execute the method according to any one of claims 1 to 10, and the network device is used to execute the method according to any one of claims 11 to 20.

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