Signal transmission method and apparatus

Abstract

The present application provides a signal transmission method and apparatus. The method comprises: receiving first information, the first information being used for indicating a first index corresponding to a first signal, the first signal being carried in a single carrier for transmission, 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 respectively corresponding to the plurality of indexes, the first parameter group being a parameter group associated with the first index, the parameter group comprising a sampling frequency and / or a symbol rate, the sampling frequency being equal to a sampling frequency corresponding to one subcarrier interval of a multi-carrier, and a symbol period determined on the basis of the symbol rate being equal to a symbol period of one subcarrier interval of the multi-carrier; and transmitting the first signal on the basis of the first parameter group, so that a communication device can receive a single-carrier signal and a multi-carrier signal by using the same set of parameters, thereby reducing the complexity of implementation and saving costs.

Description

Signal transmission method and device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on February 7, 2024, with application number 202410176406.9 and invention name “Signal Transmission Method and Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communications, and more specifically, to a signal transmission method and device. Background Art

[0003] The waveforms in communication systems are divided into single-carrier waveforms and multi-carrier waveforms. Typical multi-carrier waveforms include orthogonal frequency division multiplexing (OFDM) waveforms. However, OFDM waveforms have a high peak-to-average power ratio (PAPR) problem, which may cause signal distortion, thereby destroying the orthogonality between each subchannel, generating interference and deteriorating system performance. In comparison, single-carrier waveforms (such as single-carrier quadrature amplitude modulation (SC-QAM) waveforms or single-carrier frequency domain equalization (SC-FDE)) have lower PAPRs, and the transmitter does not involve time-frequency conversion, which has the advantage of low complexity. However, when a communication device has the ability to transmit and receive multi-carrier waveforms and single-carrier waveforms at the same time, in order to ensure the flexibility of multi-carrier systems and single-carrier systems respectively, it is necessary to design parameters for OFDM symbols and single-carrier symbols separately, that is, the system needs to design corresponding signals for the two waveforms separately, which is complex and costly.

[0004] Therefore, in the scenarios of single-carrier waveform and multi-carrier waveform, how to reduce the implementation complexity of communication equipment and save costs is an urgent problem to be solved. Summary of the Invention

[0005] The present application provides a method and apparatus for signal transmission. When a communication device is capable of transmitting and receiving both multi-carrier waveforms and single-carrier waveforms, by configuring a specific parameter group for the single-carrier waveform, the communication device can transmit and receive both single-carrier and multi-carrier signals using the same set of parameters, thereby reducing implementation complexity and saving costs.

[0006] 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, wherein the first signal is 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 sampling frequency, and / or a symbol rate, wherein the sampling frequency is equal to the sampling frequency corresponding to a subcarrier interval of a multicarrier, and a symbol period determined based on the symbol rate is equal to a symbol period of a subcarrier interval of the multicarrier; and transmitting the first signal according to the first parameter group.

[0007] 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.

[0008] It can be understood that the transmission of the first signal carried in a single carrier can be understood as the transmission of the first signal between the terminal device and the network device using a single carrier waveform.

[0009] It can be understood that the above-mentioned first association relationship supports signal transmission when the communication device has the ability to send and receive multi-carrier waveforms and single-carrier waveforms at the same time, and after the terminal device receives the first information and determines the first parameter group, it can process and transmit the first signal according to the single-carrier processing process.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] Based on the above scheme, 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 sampling frequency and / or symbol rate, and the symbol period of the single-carrier symbol transmitted based on the first parameter group is aligned with the symbol period of the multi-carrier symbol, so that the receiver can receive single-carrier signals and multi-carrier signals through the same set of parameters, thereby reducing the design complexity of the receiver parameters and saving receiver costs.

[0020] In combination with the first aspect, in certain implementations of the first aspect, before receiving the first information, the first 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.

[0021] 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. Unless otherwise specified, this application does not limit the specific single carrier waveform supported by the terminal device. For example, the terminal device can support single carrier frequency domain equalization (SC-FDE) transmission.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] In combination with the first aspect, in some implementations of the first aspect, the sampling frequency=15KHz×2 C , C is a positive integer.

[0027] As an example but not limitation, C may be 17, 18, 19, 20, 21, etc., that is, Fs may be 3932.16Mhz, or 1966.08Mhz, or 983.04Mhz, or 491.52Mhz, etc.

[0028] Based on the above solution, multiple sampling frequencies can be defined in the first association relationship to adapt to different transmission scenarios, thereby improving the flexibility of the terminal device in signal transmission based on the first parameter group.

[0029] 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 quadrature amplitude modulation or offset quadrature amplitude modulation, and the sampling frequency is 3932.16 MHz.

[0030] 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.

[0031] 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.

[0032] In another possible implementation, the first association relationship may set a separate bit in each index to indicate the modulation mode of the single carrier. Exemplarily, each index of the first association relationship may include a first bit and a second bit, where the first bit is used to indicate at least one of a sampling frequency and a symbol rate, and the second bit is used to indicate the modulation mode of the single carrier.

[0033] 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.

[0034] 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.

[0035] 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."

[0036] Based on the above solution, the network device can indicate the modulation mode 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.

[0037] 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, and the symbol rate is one of 983.04 MHz, 1310.7 MHz, 1966.08 MHz, 2621.4 MHz or 2949.12 MHz.

[0038] 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, and the symbol rate is one of 1966.08 MHz, 2621.44 MHz, 3932.16 MHz, 5242.8 MHz or 5898.24 MHz.

[0039] 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 an oversampling multiple, and the symbol rate and the oversampling multiple satisfy at least one of the following: the symbol rate is 983.04 MHz and the oversampling multiple is 4 / 1, or the symbol rate is 1966.08 MHz and the oversampling multiple is 2 / 1, or the symbol rate is 1310.7 MHz and the oversampling multiple is 3 / 1, or the symbol rate is 2621.44 MHz and the oversampling multiple is 3 / 2, or the symbol rate is 3932.16 MHz and the oversampling multiple is 1 / 1, or the symbol rate is 5242.8 MHz and the oversampling multiple is 3 / 4, or the symbol rate is 2949.12 MHz and the oversampling multiple is 4 / 3, or the symbol rate is 5898.24 MHz and the oversampling multiple is 2 / 3.

[0040] Based on the above scheme, the terminal device can determine the corresponding symbol rate based on the sampling frequency + oversampling multiple, or the terminal device can determine the corresponding sampling frequency based on the symbol rate + oversampling multiple, thereby improving the accuracy of determining the sampling frequency and symbol rate.

[0041] In combination with the first aspect, in some implementations of the first aspect, at least one parameter group among the multiple parameter groups further includes a roll-off factor, and the roll-off factor and the symbol rate satisfy one of the following: the symbol rate is 983.04 MHz or 1966.08 MHz, and the roll-off factor is 3, or, the symbol rate is 983.04 MHz or 1966.08 MHz, and the roll-off factor is 2, or, the symbol rate is 983.04 MHz or 1966.08 MHz, and the roll-off factor is 1, or, the symbol rate is 983.04 MHz or 1966.08 MHz, and the roll-off factor is 0.5, or, the symbol rate is 1310.7 MHz or 2621.44 MHz, and the roll-off factor is 2, or, the symbol rate is 1310.7 MHz or 2621.44 MHz, and the roll-off factor is 1.25, or, the symbol rate is 1310.7 MHz Hz or 2621.44 MHz with a roll-off factor of 0.5, or, the symbol rate is 1966.08 MHz or 3932.16 MHz with a roll-off factor of 1, or, the symbol rate is 1966.08 MHz or 3932.16 MHz with a roll-off factor of 0.5, or, the symbol rate is 1966.08 MHz or 3932.16 MHz with a roll-off factor of 0.25, or, the symbol rate is 2621.4MHz or 5242.8MHz, the roll-off factor is 0.5, or the symbol rate is 2621.4MHz or 5242.8MHz, the roll-off factor is 0.125, or the symbol rate is 2949.12MHz or 5898.24MHz, the roll-off factor is 0.33, or the symbol rate is 2949.12MHz or 5898.24MHz, the roll-off factor is 0.125.

[0042] Based on the above scheme, at least one parameter group of the first association relationship may include a roll-off factor for transmitting the first signal, so that the terminal device can generate filter coefficients and filter shapes according to the symbol rate and the roll-off factor, thereby correctly transmitting the first signal.

[0043] In combination with the first aspect, in some implementations of the first aspect, at least one parameter group among the multiple parameter groups also includes a first bandwidth, which is used to transmit the first signal, and the symbol rate and the first bandwidth satisfy at least one of the following: the symbol rate is 983.04 MHz or 1966.08 MHz, and the first bandwidth is 4 GHz, or the symbol rate is 983.04 MHz or 1966.08 MHz, and the first bandwidth is 3 GHz, or the symbol rate is 983.04 MHz or 1966.08 MHz, and the first bandwidth is 2 GHz, or the symbol rate is 983.04 MHz or 1966.08 MHz, and the first bandwidth is 1.5 GHz, or the symbol rate is 1310.7 MHz or 2621.44 MHz, and the first bandwidth is 4 GHz, or the symbol rate is 1310.7 MHz or 2621.44 MHz, and the first bandwidth is 3 GHz, or the symbol rate is 1310.7 MHz or 2621.44 MHz, and the first bandwidth is 4 GHz. The symbol rate is 1310.7 MHz or 2621.44 MHz, and the first bandwidth is 2 GHz, or the symbol rate is 1966.08 MHz or 3932.16 MHz, and the first bandwidth is 4 GHz, or the symbol rate is 1966.08 MHz or 3932.16 MHz, and the first bandwidth is 3 GHz, or the symbol rate is 1966.08 MHz or 3932.16 MHz, and the first bandwidth is 2.5 GHz, or the symbol rate is 2621.4 MHz or 5242.8 MHz, and the first bandwidth is 4 GHz, or the symbol rate is 2621.4 MHz or 5242.8 MHz, and the first bandwidth is 3 GHz, or the symbol rate is 2949.12 MHz or 5898.24 MHz, and the first bandwidth is 4 GHz, or the symbol rate is 2949.12 MHz or 5898.24 MHz, and the first bandwidth is 3.4 GHz.

[0044] 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.

[0045] It can be understood that the terminal device can determine the roll-off factor according to the symbol rate and the first bandwidth, and then generate filter coefficients based on the roll-off factor to determine the filtering shape.

[0046] Based on the above scheme, at least one parameter group of the first association relationship may include the first bandwidth, so that the terminal device can determine the roll-off factor based on the symbol rate and the first bandwidth, thereby generating the filter coefficient and the filter shape, and then correctly transmit the first signal.

[0047] In combination with the first aspect, in some implementations of the first aspect, at least one parameter group among the multiple parameter groups further includes a first coefficient, where the first coefficient is the number of signals in each single carrier symbol in the first signal.

[0048] 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.

[0049] In combination with the first aspect, in certain implementations of the first aspect, the first coefficient satisfies one of the following: the modulation mode of the first signal is orthogonal amplitude modulation, and the first coefficient is 256; the modulation mode of the first signal is offset orthogonal amplitude modulation, and the first coefficient is 512.

[0050] In combination with the first aspect, in some implementations of the first aspect, the first association relationship is predefined by a protocol.

[0051] 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, wherein the first signal is 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 sampling frequency, and / or a symbol rate, wherein the sampling frequency is equal to the sampling frequency corresponding to a subcarrier interval of a multicarrier, and a symbol period determined based on the symbol rate is equal to a symbol period of a subcarrier interval of the multicarrier; transmitting the first signal according to the first parameter group.

[0052] 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.

[0053] It can be understood that the transmission of the first signal carried in a single carrier can be understood as the transmission of the first signal between the terminal device and the network device using a single carrier waveform.

[0054] It can be understood that the above-mentioned first association relationship supports signal transmission when the communication device has the ability to transmit and receive multi-carrier waveforms and single-carrier waveforms at the same time, and the network device and the terminal device can process and transmit the first signal through the single-carrier processing process according to the first parameter group.

[0055] 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).

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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. Its specific form can be referred to the relevant description in the first aspect and will not be repeated here.

[0061] 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.

[0062] 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.

[0063] Based on the above scheme, the network device can send 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, the first parameter group including the sampling frequency and / or symbol rate, and transmit the first signal according to the first parameter group, so that the symbol period of the single-carrier symbol is aligned with the symbol period of the multi-carrier symbol, thereby realizing the multiplexing of the single-carrier waveform and the multi-carrier waveform.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] In conjunction with the second aspect, in some implementations of the second aspect, the sampling frequency is 15KHz×2 C , C is a positive integer.

[0069] As an example but not limitation, C may be 17, 18, 19, 20, 21, etc., that is, Fs may be 3932.16Mhz, or 1966.08Mhz, or 983.04Mhz, or 491.52Mhz, etc.

[0070] Based on the above solution, multiple sampling frequencies can be defined in the first association relationship to adapt to different transmission scenarios, thereby improving the flexibility of terminal devices and network devices in signal transmission based on the first parameter group.

[0071] 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 quadrature amplitude modulation or offset quadrature amplitude modulation, and the sampling frequency is 3932.16 MHz.

[0072] 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. Its specific form can be referred to the relevant description of the first aspect and will not be repeated here.

[0073] 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, and the symbol rate is one of 983.04MHz, 1310.7MHz, 1966.08MHz, 2621.4MHz or 2949.12MHz.

[0074] 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, and the symbol rate is one of 1966.08 MHz, 2621.44 MHz, 3932.16 MHz, 5242.8 MHz or 5898.24 MHz.

[0075] 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 an oversampling multiple, and the symbol rate and the oversampling multiple satisfy at least one of the following: the symbol rate is 983.04 MHz and the oversampling multiple is 4 / 1, or the symbol rate is 1966.08 MHz and the oversampling multiple is 2 / 1, or the symbol rate is 1310.7 MHz and the oversampling multiple is 3 / 1, or the symbol rate is 2621.44 MHz and the oversampling multiple is 3 / 2, or the symbol rate is 3932.16 MHz and the oversampling multiple is 1 / 1, or the symbol rate is 5242.8 MHz and the oversampling multiple is 3 / 4, or the symbol rate is 2949.12 MHz and the oversampling multiple is 4 / 3, or the symbol rate is 5898.24 MHz and the oversampling multiple is 2 / 3.

[0076] In combination with the second aspect, in some implementations of the second aspect, at least one parameter group among the multiple parameter groups further includes a roll-off factor, and the roll-off factor and the symbol rate satisfy one of the following: the symbol rate is 983.04 MHz or 1966.08 MHz, and the roll-off factor is 3, or, the symbol rate is 983.04 MHz or 1966.08 MHz, and the roll-off factor is 2, or, the symbol rate is 983.04 MHz or 1966.08 MHz, and the roll-off factor is 1, or, the symbol rate is 983.04 MHz or 1966.08 MHz, and the roll-off factor is 0.5, or, the symbol rate is 1310.7 MHz or 2621.44 MHz, and the roll-off factor is 2, or, the symbol rate is 1310.7 MHz or 2621.44 MHz, and the roll-off factor is 1.25, or, the symbol rate is 1310.7 MHz Hz or 2621.44 MHz with a roll-off factor of 0.5, or, the symbol rate is 1966.08 MHz or 3932.16 MHz with a roll-off factor of 1, or, the symbol rate is 1966.08 MHz or 3932.16 MHz with a roll-off factor of 0.5, or, the symbol rate is 1966.08 MHz or 3932.16 MHz with a roll-off factor of 0.25, or, the symbol rate is 2621.4MHz or 5242.8MHz, the roll-off factor is 0.5, or the symbol rate is 2621.4MHz or 5242.8MHz, the roll-off factor is 0.125, or the symbol rate is 2949.12MHz or 5898.24MHz, the roll-off factor is 0.33, or the symbol rate is 2949.12MHz or 5898.24MHz, the roll-off factor is 0.125.

[0077] In combination with the second aspect, in some implementations of the second aspect, at least one parameter group among the multiple parameter groups also includes a first bandwidth, which is used to transmit the first signal, and the symbol rate and the first bandwidth satisfy at least one of the following: the symbol rate is 983.04 MHz or 1966.08 MHz, and the first bandwidth is 4 GHz, or the symbol rate is 983.04 MHz or 1966.08 MHz, and the first bandwidth is 3 GHz, or the symbol rate is 983.04 MHz or 1966.08 MHz, and the first bandwidth is 2 GHz, or the symbol rate is 983.04 MHz or 1966.08 MHz, and the first bandwidth is 1.5 GHz, or the symbol rate is 1310.7 MHz or 2621.44 MHz, and the first bandwidth is 4 GHz, or the symbol rate is 1310.7 MHz or 2621.44 MHz, and the first bandwidth is 3 GHz, or the symbol rate is 1310.7 MHz or 2621.44 MHz, and the first bandwidth is 4 GHz. The symbol rate is 1310.7 MHz or 2621.44 MHz, and the first bandwidth is 2 GHz, or the symbol rate is 1966.08 MHz or 3932.16 MHz, and the first bandwidth is 4 GHz, or the symbol rate is 1966.08 MHz or 3932.16 MHz, and the first bandwidth is 3 GHz, or the symbol rate is 1966.08 MHz or 3932.16 MHz, and the first bandwidth is 2.5 GHz, or the symbol rate is 2621.4 MHz or 5242.8 MHz, and the first bandwidth is 4 GHz, or the symbol rate is 2621.4 MHz or 5242.8 MHz, and the first bandwidth is 3 GHz, or the symbol rate is 2949.12 MHz or 5898.24 MHz, and the first bandwidth is 4 GHz, or the symbol rate is 2949.12 MHz or 5898.24 MHz, and the first bandwidth is 3.4 GHz.

[0078] 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.

[0079] 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 first coefficient, where the first coefficient is the number of signals in each single carrier symbol in the first signal.

[0080] 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.

[0081] In combination with the second aspect, in certain implementations of the second aspect, the first coefficient satisfies one of the following: the modulation mode of the first signal is orthogonal amplitude modulation, and the first coefficient is 256; the modulation mode of the first signal is offset orthogonal amplitude modulation, and the first coefficient is 512.

[0082] In combination with the second aspect, in some implementations of the second aspect, the first association relationship is predefined by a protocol.

[0083] According to a third 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, wherein the first signal is 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 sampling frequency and / or a symbol rate, wherein the sampling frequency is equal to the sampling frequency corresponding to a subcarrier interval of a multicarrier, and the symbol period determined based on the symbol rate is equal to the symbol period of a subcarrier interval of the multicarrier; and a processing unit for transmitting the first signal according to the first parameter group.

[0084] 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.

[0085] In a fourth 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, wherein the first signal is 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 sampling frequency, and / or a symbol rate, wherein the sampling frequency is equal to the sampling frequency corresponding to a subcarrier interval of a multicarrier, and the symbol period determined based on the symbol rate is equal to the symbol period of a subcarrier interval of the multicarrier; a processing unit for transmitting the first signal according to the first parameter group.

[0086] 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.

[0087] In a fifth 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 third aspects above.

[0088] Optionally, there are one or more processors and one or more memories.

[0089] Optionally, the memory may be integrated with the processor, or the memory may be provided separately from the processor.

[0090] Optionally, the signal transmission device further includes a transmitter (emitter) and a receiver (receiver).

[0091] In a sixth 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 aspect or any possible implementation of the first aspect, and the network device is configured to execute the method of the second aspect or any possible implementation of the second aspect.

[0092] In a seventh aspect, a computer program is provided, which, when executed, causes the method in any possible implementation of the first to second aspects or the first to second aspects to be executed.

[0093] In an eighth 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 second aspects or the first to second aspects to be executed.

[0094] In a ninth 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 possible implementation of the first to second aspects or the first to second aspects.

[0095] 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.

[0096] In a tenth 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 second aspects or the first to second aspects to be executed.

[0097] In the eleventh aspect, a signal transmission method is provided, which includes: the terminal device executes the method in the above-mentioned first aspect or any possible implementation of the first aspect, and the network device executes the method in the above-mentioned second aspect or any possible implementation of the second aspect.

[0098] It can be understood that the supplements, explanations and beneficial effects of the first aspect are also applicable to the second to eleventh aspects above, and will not be repeated for the sake of brevity. BRIEF DESCRIPTION OF THE DRAWINGS

[0099] FIG1 is a schematic diagram of a constellation point and bit mapping rule;

[0100] FIG2 is a schematic diagram of a processing flow of a DFT-s-OFDM technology;

[0101] FIG3 is a schematic diagram of a processing flow of an SC-QAM technology;

[0102] FIG4 is a schematic diagram of a processing flow of the SC-FDE technology;

[0103] FIG5 is a schematic diagram of a single carrier symbol format;

[0104] FIG6 is a schematic diagram of a system architecture using an embodiment of the present application;

[0105] FIG7 is a schematic diagram of a signal transmission method 700 provided in an embodiment of the present application;

[0106] FIG8 is a schematic diagram of a processing flow of the SC-QAM technology provided in an embodiment of the present application;

[0107] FIG9 is a schematic diagram of a multi-carrier reception process according to an embodiment of the present application;

[0108] FIG10 is a schematic block diagram of a communication device 1000 according to an embodiment of the present application;

[0109] FIG11 is a schematic block diagram of a communication device 1100 according to an embodiment of the present application;

[0110] FIG12 is a schematic block diagram of a communication device 1200 according to an embodiment of the present application;

[0111] FIG13 is a schematic block diagram of a communication device 1300 according to an embodiment of the present application;

[0112] FIG14 is a schematic block diagram of a communication device 1400 according to an embodiment of the present application. DETAILED DESCRIPTION

[0113] The technical solution in this application will be described below with reference to the accompanying drawings.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] To facilitate understanding of the embodiments of the present application, a brief explanation of the terms involved in the embodiments of the present application is given.

[0119] (1) Peak to average power ratio (PAPR)

[0120] 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.

[0121] 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.

[0122] (2) Modulation

[0123] In communication systems, the information to be transmitted is often represented by bits called '0' or '1'. Since signals are often analog signals with frequency, amplitude, and phase, information can be carried on them through modulation. Quadrature phase shift keying (QPSK) and quadrature quadrature phase shift keying (QPSK) are two different constellation point mapping methods. As shown in Figure 1-A, one point (or symbol) can correspond to two information bits. This means that in quadrature phase shift keying (QPSK), there are 2^2 = 4 symbols, each with 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. As shown in Figure 1-B, one point (or symbol) can correspond to four information bits. This means that in 16QAM, there are 2^4 = 16 symbols, each with its own amplitude and phase. 16QAM can have multiple amplitudes, and the phases between each symbol also vary.

[0124] 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.

[0125] (3) Multi-carrier waveform

[0126] Orthogonal Frequency Division Multiplexing (OFDM) technology is a waveform widely used in various communication systems (such as LTE and NR). The OFDM waveform can convert high-speed data streams into multiple parallel low-speed data streams through serial / parallel conversion, and then distribute them to subchannels on several subcarriers of different frequencies for transmission. As a result, OFDM technology greatly improves spectrum utilization. However, OFDM has a high peak-to-average power ratio. The output of a multi-carrier system is the superposition of multiple subchannel signals. Therefore, if the phases of multiple signals are consistent, the instantaneous power of the resulting superimposed signal will be much higher than the average power of the signal, resulting in a large PAPR. This places high demands on the linearity of the amplifier in the transmitter, which may cause signal distortion and change the signal spectrum, thereby destroying the orthogonality between the subchannels, generating interference and deteriorating system performance.

[0127] The OFDM (discrete fourier transform spread orthogonal frequency division multiplexing, DFT-s-OFDM) waveform, based on discrete Fourier transform spread orthogonal frequency division multiplexing, leverages the OFDM transmitter structure and performs precoding before data is mapped to subcarriers. This precoding reduces PAPR. Compared to the OFDM waveform, the DFT-s-OFDM waveform offers greater output power and higher power amplifier efficiency at the same power level, improving coverage and reducing energy consumption, similar to a single-carrier waveform. The coverage and power consumption advantages of a single-carrier waveform are particularly pronounced on the terminal device side, and therefore, in existing versions of LTE and NR, single-carrier waveforms are used for uplink transmission.

[0128] 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 is a schematic diagram of the processing flow of a DFT-s-OFDM technology provided by an embodiment of the present application. As shown in Figure 2, the transmitting end 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 receiving end 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 to obtain the time-domain discrete sequence.

[0129] Through the N-point DFT, the transmitting end 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 a cyclic prefix can avoid symbol interference.

[0130] 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.

[0131] (4) Single carrier waveform

[0132] The single-carrier quadrature amplitude modulation (SC-QAM) waveform is a commonly used single-carrier waveform widely used in communication systems such as second-generation (2G) mobile communication systems and Wi-Fi systems. Figure 3 illustrates the processing flow of SC-QAM technology. As shown in Figure 3, 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 then inputs the processed signal into the decoder for decoding.

[0133] 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 Transformation (FFT) or IDFT or Inverse Fast Fourier Transformation (IFFT). Therefore, compared to multi-carrier waveforms, SC-QAM waveforms have the advantages of lower complexity and lower PAPR.

[0134] 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 is a schematic diagram of the processing flow of the SC-FDE technology. As shown in Figure 4, the transmitter modulates, adds a cyclic prefix (CP), upsamples, pulse shapes, and truncates the signal encoded by the encoder in sequence, and finally sends the processed signal through the RF device and antenna port. The receiver receives the signal from the transmitter through the antenna port and the RF device, and performs matched filtering, downsampling, removal of the cyclic prefix, FFT, equalization (equalizer), IDFT, and demodulation on the received signal in sequence, and inputs the processed signal into the decoder for decoding.

[0135] In Figure 4, 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 a single-carrier system to process multiple data simultaneously while overcoming the impact of multipath channels on system performance.

[0136] At present, when a communication device has the ability to transmit and receive multi-carrier waveforms and single-carrier waveforms at the same time, the multi-carrier waveform corresponds to one transceiver, and the single-carrier waveform corresponds to one transceiver, and the two transceivers have different parameters. For example, the transmitting end sends a signal with a multi-carrier waveform, and the receiving end uses the parameters corresponding to the multi-carrier transceiver to receive and process the signal with the multi-carrier waveform when it is known that the received signal is a signal with a multi-carrier waveform; the transmitting end sends a signal with a single-carrier waveform, and the receiving end uses the parameters corresponding to the single-carrier transceiver to receive and process the signal with the single-carrier waveform when it is known that the received signal is a signal with a single-carrier waveform. For example, the Institute of Electrical and Electronics Engineers (IEEE) 802.11ad protocol or the IEEE 802.11ay protocol can be compatible with SC-QAM waveforms and OFDM waveforms. The system parameters used in the IEEE 802.11ad or IEEE 802.11ay protocol are shown in Table 1 below:

[0137] Table 1 System parameters corresponding to OFDM waveform and SC waveform

[0138] Among them, the symbol period of OFDM symbol (including cyclic prefix) is 0.242 microseconds (us). Figure 5 is a symbol format used by a single carrier. As shown in Figure 5, the symbol period of a single carrier symbol is T SC = (64 + 448) * Tc = 0.292us. This shows that the protocol designs parameters separately for OFDM symbols and single-carrier symbols, resulting in inconsistent symbol periods for OFDM and single-carrier symbols. In other words, the current standard for compatibility with both waveforms doesn't consider alignment between single-carrier and multi-carrier symbols. This requires the system to design receiver parameters for each waveform separately to receive the corresponding signals, which increases complexity and cost.

[0139] In view of this, an embodiment of the present application proposes a method and apparatus for signal transmission. When a communication device has the ability to transmit and receive both multi-carrier waveforms and single-carrier waveforms, by configuring a specific parameter group for the single-carrier waveform, the communication device can transmit and receive both single-carrier signals and multi-carrier signals using the same set of parameters, thereby reducing implementation complexity and saving costs.

[0140] 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.

[0141] 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.

[0142] Please refer to Figure 6, which is a schematic diagram of the system architecture for applying an embodiment of the present application. The system architecture shown in Figure 6 includes a network device and three terminal devices. The DFT-s-OFDM waveform is used between the terminal device 1 and the network device, the OFDM waveform is used between the terminal device 2 and the network device, and the CP-SC (for example, CP-SC-QAM) waveform is used between the terminal device 3 and the network device. Among them, the terminal device 1, the terminal device 2, and the terminal device 3 are not limited to using one waveform to communicate with the network device. For example, in addition to the DFT-s-OFDM waveform, the SC-QAM waveform can also be used between the terminal device 1 and the network device.

[0143] 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.

[0144] It should be noted that the number of devices, configurations, and three waveforms shown in FIG6 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.

[0145] To facilitate understanding of the embodiments of the present application, the following points are explained:

[0146] 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.

[0147] 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.

[0148] 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.

[0149] 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.

[0150] 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.

[0151] 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.

[0152] 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.

[0153] 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.

[0154] 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.

[0155] Eighth, in this application, if there is no logical conflict, "report", "feedback" and "send" can be interchanged.

[0156] FIG7 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:

[0157] 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.

[0158] 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).

[0159] 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.

[0160] 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.

[0161] In another possible implementation, the method 700 further includes the following steps:

[0162] 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.

[0163] 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.

[0164] 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.

[0165] 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.

[0166] 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.

[0167] In an embodiment of the present application, the first index is used to indicate a first parameter group in a first association relationship. The first association relationship may include multiple indexes and multiple parameter groups corresponding to the multiple indexes, the multiple indexes corresponding to the multiple parameter groups in a one-to-one relationship, and the first parameter group is the parameter group corresponding to the first index. It will be understood that the multiple parameter groups can support a terminal device to transmit and receive signals with a single carrier waveform and a multi-carrier waveform using the same set of parameters.

[0168] Each parameter group includes a sampling frequency and / or a symbol rate, wherein the sampling frequency is equal to the sampling frequency corresponding to one subcarrier spacing of the multicarrier, and the symbol period determined based on the symbol rate is equal to the symbol period of one subcarrier spacing of the multicarrier. In other words, at the same subcarrier spacing (e.g., 15 kHz), the sampling frequency in the parameter group is equal to the sampling frequency corresponding to the multicarrier, and the symbol period determined based on the symbol rate is equal to the symbol period of the multicarrier.

[0169] 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.

[0170] It is 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. See Table 2, which is a transmission configuration information table provided in the embodiment of the present application.

[0171] It can be understood that the table used in actual application can be all or part of the items in Table 2, and the embodiments of the present application are not limited to this.

[0172] Table 2 A transmission configuration information table

[0173] The first association relationship can also be expressed in the form shown in Table 2b. It can be understood that the table used in actual application can be all or part of the items in Table 2b, and this embodiment of the application is not limited to this.

[0174] Table 2b: A transmission configuration information table

[0175] It can be understood that the NR system can support multiple subcarrier spacings (SCS), and the specific subcarrier spacing used is known to both the network equipment and the terminal equipment. The subcarrier spacing in Table 2 above takes 15kHz as an example and does not constitute a limitation on the embodiments of the present application. For example, the subcarrier spacing can also be 30KHz.

[0176] It will be appreciated that the configuration indexes in Table 2 start at "0" and are numbered in ascending order of symbol rate. The above numbering is for example only. For example, the configuration indexes may also be numbered starting at "1," which is not limited in this embodiment of the present application. Table 2 shows the parameter group corresponding to each of the eight configuration indexes. The parameter group may include at least one of the sampling frequency and the symbol rate.

[0177] 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.

[0178] 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.

[0179] 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.

[0180] The sampling frequency Fs in the transmission configuration parameter table provided in the embodiment of the present application satisfies: S =15KHz×2 C , where C is a positive integer. For example, C can be 17, 18, 19, 20, 21, etc., that is, Fs may be 3932.16 MHz, or 1966.08 MHz, or 983.04 MHz, or 491.52 MHz, etc. For example, in Table 2 above, when the subcarrier spacing is 15 kHz and C = 17, the sampling frequency is specified to be 3932.4 MHz.

[0181] The symbol rate in Table 2 represents the rate of transmission signal. The relationship between the symbol rate Fc and Fs in the transmission configuration parameter table provided in the embodiment of the present application 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}.

[0182] When the subcarrier spacing is the same, the sampling frequency provided in Table 2 is equal to the sampling frequency corresponding to the multi-carrier waveform, and the symbol period determined based on the symbol rate provided in Table 2 is equal to the period of the symbol of the multi-carrier waveform, so that the symbol period of the single-carrier symbol is aligned with the symbol period of the multi-carrier symbol, thereby realizing the multiplexing of the single-carrier waveform and the multi-carrier waveform.

[0183] Optionally, as shown in Table 3, at least one parameter group in the first association relationship may further include a separate column of oversampling multiples (or 1 / oversampling multiples). For example, in Table 3, when the sampling frequency is 3932.4 MHz and the oversampling multiple is 4 / 1, the symbol rate is 983.04 MHz.

[0184] Table 3 A transmission configuration information table

[0185] 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.

[0186] 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, as shown in Table 4 below, 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.

[0187] Table 4 Transmission configuration information table

[0188] It can be understood that the number of signals in a single symbol in Table 4 can be understood as the number of DFT points, or as the data length in a single symbol. For example, in Table 4, 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 (not shown in Table 4).

[0189] Optionally, the parameter group may also include a roll-off factor of a filter used to transmit the first signal, and then generate filter coefficients based on the roll-off factor to determine the filter shape. The specific process will be described in detail below and will not be repeated here.

[0190] Optionally, the parameter group may also include a first bandwidth for transmitting 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 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.

[0191] As an example and not a limitation, when the network device indicates the modulation mode by the number of signals in a single symbol in the first association relationship, each parameter group in the first association relationship can be the following Table 5 itself or a subset of the following Table 5.

[0192] Table 5 Transmission configuration information table

[0193] In an embodiment of the present application, under the premise that the roll-off factor or the first bandwidth in the parameter group is the same, the symbol rate, the oversampling multiple and the number of signals in a single symbol in the parameter group corresponding to the OQAM signal are twice the symbol rate, the oversampling multiple and the number of signals in a single symbol in the parameter group corresponding to the QAM signal.

[0194] 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 being used to indicate at least one of a sampling frequency and a symbol rate, and the second bit being used to indicate the modulation mode of a single carrier. As shown in Table 6 below, 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. When the first index is "0+A", the sampling frequency included in the first parameter group is 3932.16 MHz, the symbol rate is 983.04 MHz, and the modulation mode is QAM; when the first index is "3+B", the sampling frequency included in the first parameter group is 3932.16 MHz, the symbol rate is 5242.8 MHz, and the modulation mode is OQAM.

[0195] Table 6 Transmission configuration information table

[0196] Similarly, in this implementation, each parameter group may further include at least one of an oversampling factor, a roll-off factor, a first bandwidth, and the number of signals in a single symbol. As an example and not a limitation, the first association relationship may be as shown in Table 7 below, and the first association relationship may be Table 7 itself or a subset of Table 7, which is not limited in this embodiment of the present application.

[0197] Table 7 Transmission configuration information table

[0198] 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."

[0199] Unless otherwise specified, due to system design considerations, the table information actually used in the embodiments of the present application may only include partial table item information such as those in Tables 3 to 7. The inclusion relationship of the table items in the following tables will not be repeated.

[0200] S720: The terminal device transmits the first signal according to the first parameter group.

[0201] Specifically, after receiving the above-mentioned first information, the terminal device can determine the first parameter group according to the first index and the first association relationship.

[0202] 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 7, the first information can indicate the configuration index "2" in Table 6, 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 6, 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.

[0203] 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.

[0204] 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.

[0205] 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.

[0206] Correspondingly, the network device may process the uplink signal according to the first parameter group to obtain uplink symbols.

[0207] 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.

[0208] 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.

[0209] 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.

[0210] Optionally, an embodiment of the present application may define a transmission state in which the network device and the terminal device can use the first association relationship to transmit. It can be understood that this transmission state is a transmission state defined for a situation where the communication device is capable of transmitting and receiving both a single-carrier waveform and a multi-carrier waveform. 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.

[0211] 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.

[0212] 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.

[0213] 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.

[0214] 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.

[0215] 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.

[0216] 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.

[0217] Based on the above solution, when a communication device (such as a terminal device or network device) is capable of transmitting and receiving both single-carrier waveforms and multi-carrier waveforms, 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 waveforms and multi-carrier waveforms can use transmission configuration information, which allows the device to transmit and receive signals with lower complexity than using two sets of parameters, while avoiding the equipment overhead of installing two sets of transceivers.

[0218] The following describes uplink symbol processing using methods A through C, using uplink transmission as an example, combining single-carrier waveform processing and multi-carrier waveform processing. The single-carrier waveform processing uses SC-QAM technology as an example.

[0219] Mode A: The first association relationship includes a configuration index and a sampling frequency, a symbol rate, and a roll-off factor corresponding to the configuration index.

[0220] Specifically, the first association relationship in mode A can be represented by the following Table 8. Table 8 may include 28 configuration indexes. The omitted configuration indexes and the corresponding sampling frequencies, symbol rates, and roll-off factors can be found in Table 5. Table 8 may also include some of the 28 configuration indexes, as well as the sampling frequencies, symbol rates, and roll-off factors corresponding to these configuration indexes.

[0221] Table 8 Transmission configuration information table

[0222] It can be understood that when the terminal device receives the first information, it looks up the sampling frequency, symbol rate and roll-off factor corresponding to the first information from Table 8, that is, it looks up the sampling frequency, symbol rate and roll-off factor corresponding to the first index indicated by the first information. It can be understood that the sampling frequency, symbol rate and roll-off factor corresponding to each configuration index in Table 8 represent the association relationship between the sampling frequency, symbol rate and roll-off factor corresponding to each configuration index. For example, the sampling frequency corresponding to the configuration index "0" is 3932.16MHz, the symbol rate is 983.04MHz, and the roll-off factor is 3, which means that the association relationship between the sampling frequency, symbol rate and roll-off factor corresponding to the configuration index "0" is: the sampling frequency is 3932.16MHz, the symbol rate is 983.04MHz, and the roll-off factor is 3. The association relationship listed in Table 8 can align the symbol period of a single-carrier symbol with the symbol period of a multi-carrier symbol, thereby realizing the multiplexing of a single-carrier waveform and a multi-carrier waveform.

[0223] It can be understood that when the terminal device determines the roll-off factor indicated by the first information according to Table 8, the filter coefficient can be generated according to the 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:

[0224] 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.

[0225] 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 Table 8, and then substitute the symbol rate and roll-off factor into the above formula to determine the filtering shape.

[0226] Figure 8 illustrates the processing flow of the SC-QAM technology provided by an embodiment of the present application. The following, in conjunction with Figure 8, illustrates the process of processing uplink symbols using a single-carrier waveform by a terminal device. It should be understood that Figure 8 illustrates the transmission process, not the reception process; the reception process can be understood as the inverse of the transmission process.

[0227] It can be understood that the uplink symbol can be obtained through modulation processing, or can be obtained through modulation and adding a cyclic prefix, and the embodiments of the present application do not limit this.

[0228] As shown in Figure 8, Nd uplink symbols undergo M-fold upsampling to obtain M*Nd sampling points. Subsequently, pulse shaping is performed to obtain M*Nd sampling points. Finally, L-fold downsampling is performed to obtain Ns sampling points. Ns = Nd*M / L, where M and L are positive integers. To avoid high complexity, the values ​​of M and L should not be too large, as excessive values ​​significantly impact both storage and computational complexity. M can be {2, 3, 4, 5, 6, 7, 8, 9, 10}, and L can be {1, 2, 3, 4, 5, 6, 7, 8}. To satisfy the Nyquist sampling theorem, the upsampling factor M must be greater than or equal to the downsampling factor L. If L = 1, the process shown in Figure 8 does not include downsampling; if L is greater than 1, the process shown in Figure 8 includes downsampling.

[0229] It can be understood that the above M / L is the oversampling multiple. Therefore, when the terminal device knows the configuration index "0", it can calculate the oversampling multiple as 4 / 1 based on the ratio of the known sampling frequency 3932.16MHz and the symbol rate 983.04MHz, and determine the upsampling multiple as 4 and the downsampling multiple as 1. Then, the terminal device can process the uplink symbol according to the upsampling multiple, the filtering shape and the downsampling multiple to obtain the uplink symbol.

[0230] It can be understood that the sampling frequencies in Table 8 can be expressed as oversampling multiples or 1 / oversampling multiples in addition to being expressed by specific numerical values, or can be expressed as specific numerical values ​​+ oversampling multiples (or 1 / oversampling multiples). For example, the sampling frequency corresponding to the configuration index "0" can be expressed as 983.04MHz, or as 4 / 1 or 1 / 4, or as 983.04MHz(4 / 1) or 983.04MHz(1 / 4). When expressed as 4 / 1 or 1 / 4 and the sampling frequency is 3932.16MHz, the symbol rate Fc=Fs*L / M=3932.16*1 / 4=983.04MHz can be calculated based on Fs=Fc*M / L.

[0231] The effect of pulse shaping in the frequency domain in Figure 8 can be understood as spectrum shaping, so pulse shaping can be understood as filtering. During 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 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.

[0232] Optionally, Table 8 may further include a column of transmission parameters for indicating the number of signals included in each symbol, that is, the first association relationship also includes an association relationship between the sampling frequency and the number of signals included in each symbol.

[0233] 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.

[0234] 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.

[0235] As an example but not a limitation, after receiving the first signal, the network device may process the first signal using the receiving process corresponding to the single-carrier waveform sending process shown in FIG8 .

[0236] By way of example and not limitation, after receiving the first signal, the network device may process the first signal using the multi-carrier (e.g., DFT-s-OFDM) reception process shown in FIG9 . As shown in FIG9 , the multi-carrier reception process may include processes such as cyclic prefix removal, FFT, subcarrier mapping removal, IDFT, and demodulation.

[0237] Based on the above solution, the terminal device can determine the filtering waveform and send the single carrier waveform when obtaining the symbol rate and roll-off factor corresponding to a certain configuration index by querying Table 8.

[0238] Mode B: The first association relationship includes a configuration index and a sampling frequency, a symbol rate, and a first bandwidth corresponding to the configuration index.

[0239] Specifically, the first association relationship in mode B 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 first bandwidth can be found in Table 5. Table 9 may also include some of the 28 configuration indexes, as well as the sampling frequency, symbol rate, and first bandwidth corresponding to these configuration indexes.

[0240] Table 9 Transmission configuration information table

[0241] When the terminal device receives the first information, it can search for the sampling frequency, symbol rate and first bandwidth corresponding to the first indication information from Table 9, that is, search for the sampling frequency, symbol rate and first bandwidth corresponding to the indicated configuration index. It can be understood that the sampling frequency, symbol rate and first bandwidth corresponding to each configuration index in Table 9 represent the association relationship between the sampling frequency, symbol rate and first bandwidth corresponding to each configuration index. For example, the sampling frequency corresponding to the configuration index "2" is 3932.16MHz, the symbol rate is 983.04MHz, and the first bandwidth is 2GHz, indicating that the association relationship between the extended bandwidth corresponding to the configuration index "2" and the symbol rate is: the sampling frequency is 3932.16MHz, the symbol rate is 983.04MHz, and the first bandwidth is 2GHz.

[0242] It is understood that the terminal device can determine filter parameters, such as the roll-off factor of the filter, based on the symbol rate and the first bandwidth corresponding to the configuration index. For example, when the terminal device determines that the symbol rate corresponding to the configuration index "1" is 983.04 MHz and the first bandwidth is 3 GHz, the roll-off factor can be determined as (3000-983.04) / (983.04)≈2. Furthermore, the terminal device can substitute the symbol rate and the roll-off factor into formula (1) to determine the filter shape.

[0243] Optionally, Table 9 may further include a column of transmission parameters for roll-off factors, that is, the first association relationship also includes an association relationship between the sampling frequency and the roll-off factor.

[0244] Optionally, Table 9 may further include a column of transmission parameters for the number of signals included in each symbol, that is, the first association relationship also includes an association relationship between the sampling frequency and the number of signals included in each symbol.

[0245] Based on the above solution, when the terminal device can obtain the symbol rate and first bandwidth corresponding to a configuration index by querying Table 8, it can determine the roll-off factor corresponding to the index configuration according to the symbol rate and first bandwidth, thereby determining the filtered waveform.

[0246] Mode C: The first association relationship includes a configuration index and a sampling frequency and a symbol rate corresponding to the configuration index.

[0247] Specifically, the first association relationship in method C can be represented by the following Table 10. Table 10 may include 28 configuration indexes. The omitted configuration indexes and the corresponding sampling frequencies, oversampling multiples, and roll-off factors can be found in Table 5. Table 10 may also include some of the 28 configuration indexes, as well as the sampling frequencies, oversampling multiples, and roll-off factors corresponding to these configuration indexes.

[0248] Table 10 Transmission configuration information table

[0249] When the terminal device receives the first information, it searches Table 10 for the sampling frequency, oversampling multiple and roll-off factor corresponding to the first information, that is, it searches for the sampling frequency, oversampling multiple and roll-off factor corresponding to the configuration index indicated by the first information. It can be understood that the sampling frequency, oversampling multiple and roll-off factor corresponding to each configuration index in Table 10 represent the association relationship between the sampling frequency, oversampling multiple and roll-off factor corresponding to each configuration index. For example, the sampling frequency corresponding to the configuration index "0" is 3932.16MHz, the oversampling multiple is 4 / 1, and the roll-off factor is 4, which means that the association relationship between the sampling frequency, oversampling multiple and roll-off factor corresponding to the configuration index "0" is: the sampling frequency is 3932.16MHz, the oversampling multiple is 4 / 1, and the roll-off factor is 4.

[0250] It is understood that the terminal device can calculate the symbol rate according to the sampling frequency and oversampling multiple corresponding to the configuration index, according to the formula symbol rate = sampling frequency / oversampling multiple. For example, the sampling frequency corresponding to the configuration index "0" is 3932.16MHz, and the oversampling multiple is 1 / 4, then the symbol rate Fc = Fs*L / M = 3932.16*1 / 4 = 983.04MHz.

[0251] It is understood that the sampling frequency in Table 10 can also be combined with the oversampling multiple into one column, such as sampling frequency (oversampling multiple) or sampling frequency (1 / oversampling multiple). For example, the sampling frequency corresponding to the configuration index "0" can be expressed as 3932.16 MHz (4 / 1) or 3932.16 MHz (1 / 4).

[0252] Optionally, Table 10 may further include a column of transmission parameters for symbol rate, that is, the first association relationship also includes an association relationship between sampling frequency and symbol rate.

[0253] Optionally, Table 10 may further include a column of transmission parameters for the first bandwidth, that is, the first association relationship also includes an association relationship between the sampling frequency and the first bandwidth.

[0254] Optionally, Table 10 may further include a column of transmission parameters for the number of signals included in each symbol, that is, the first association relationship also includes an association relationship between the sampling frequency and the number of signals included in each symbol.

[0255] Based on the above scheme, the terminal device can obtain the sampling frequency, oversampling multiple and roll-off factor corresponding to a certain configuration index by querying Table 10, and can determine the symbol rate according to the sampling frequency and oversampling multiple, and then determine the filtering shape according to the symbol rate and roll-off factor.

[0256] Finally, the device embodiment of the embodiment of the present application is introduced.

[0257] 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.

[0258] Figure 10 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.

[0259] 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.

[0260] 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.

[0261] 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.

[0262] 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.

[0263] 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.

[0264] The above description is merely exemplary. For details, please refer to the contents of the above method embodiments. The implementation of each operation in FIG10 may also correspond to the corresponding description of the method embodiments shown in FIG7-FIG9.

[0265] Figure 11 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.

[0266] 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.

[0267] 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.

[0268] 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.

[0269] 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.

[0270] 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.

[0271] The device embodiments shown in Figures 10 and 11 are used to implement the contents described in Figures 7 to 9. The specific execution steps and methods of the devices shown in Figures 10 and 11 can refer to the contents described in the above method embodiments.

[0272] Figure 12 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.

[0273] 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.

[0274] 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.

[0275] 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.

[0276] 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.

[0277] Optionally, the communication device 1200 further includes a memory.

[0278] Optionally, the processor and memory are integrated together.

[0279] Optionally, the memory is outside the communication device 1200 .

[0280] 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.

[0281] 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.

[0282] FIG13 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 configured to execute the operations performed by the network device in the method embodiments shown in FIG7-FIG9 above.

[0283] When the communication device 1300 is a network device, such as a base station. Figure 13 shows a simplified schematic diagram of the base station structure. 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 usually be 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 (not shown in Figure 13), wherein the radio frequency circuit is mainly used for radio frequency processing.

[0284] 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.

[0285] 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.

[0286] For example, in one implementation, the transceiver module of module 1330 is used to execute the transceiver-related processes executed by the network device in the embodiments shown in Figures 7 to 9. The processor of module 1310 is used to execute the processing-related processes executed by the network device in the embodiments shown in Figures 7 to 9.

[0287] FIG13 is merely an example and not a limitation. The network device including the processor, memory, and transceiver described above may not rely on the structures shown in FIG10 to FIG12 .

[0288] 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.

[0289] Figure 14 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.

[0290] When communication device 1400 is a terminal device, Figure 14 shows a simplified schematic diagram of the terminal device structure. As shown in Figure 14, the terminal device includes a processor, 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 (not shown in Figure 14), an antenna 1433, and input / output devices (not shown in Figure 14).

[0291] 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.

[0292] 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.

[0293] For ease of explanation, Figure 14 shows only one memory, processor, and transceiver. In actual terminal equipment products, one or more processors and one or more memories may exist. 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 this embodiment of the present application.

[0294] 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.

[0295] As shown in Figure 14, 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.

[0296] 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.

[0297] For example, in one implementation, the processor 1410 is used to execute the processing actions of the terminal device in the embodiments shown in Figures 7-9, and the transceiver 1430 is used to execute the transceiver actions of the terminal device in Figures 7-9.

[0298] FIG14 is merely an example and not a limitation. The terminal device including the transceiver module and the processing module may not rely on the structures shown in FIG10 to FIG12 .

[0299] 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.

[0300] 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.

[0301] 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.

[0302] 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.

[0303] 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.

[0304] 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.

[0305] 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.

[0306] 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.

[0307] 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.

[0308] 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.

[0309] 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.

[0310] 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.

[0311] 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.

[0312] 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.

Claims

1. A signal transmission method, characterized in that: include: receiving first information, where the first information is used to indicate a first index corresponding to the first signal, The first signal is carried and transmitted in a single carrier, 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, and the first parameter group is a parameter group associated with the first index. The parameter group includes sampling frequency, and / or symbol rate, wherein, The sampling frequency is equal to the sampling frequency corresponding to one subcarrier spacing of the multicarrier, and the symbol period determined based on the symbol rate is equal to the symbol period of one subcarrier spacing of the multicarrier; The first signal is transmitted according to the first parameter set.

2. The method according to claim 1, 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.

3. The method according to claim 1 or 2, characterized in that The sampling frequency = 15KHz×2 c , c is a positive integer.

4. The method according to any one of claims 1 to 3, 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 sampling frequency is 3932.16 MHz.

5. The method according to claim 4, characterized in that The modulation mode corresponding to at least one parameter group among the multiple parameter groups is orthogonal amplitude modulation, and the symbol rate is one of 983.04 MHz, 1310.7 MHz, 1966.08 MHz, 2621.4 MHz or 2949.12 MHz.

6. The method according to claim 4, characterized in that The modulation mode corresponding to at least one parameter group among the multiple parameter groups is offset quadrature amplitude modulation, and the symbol rate is one of 1966.08 MHz, 2621.44 MHz, 3932.16 MHz, 5242.8 MHz or 5898.24 MHz.

7. The method according to any one of claims 4 to 6, characterized in that At least one parameter group among the plurality of parameter groups further includes an oversampling factor, and the symbol rate and the oversampling factor satisfy at least one of the following: The symbol rate is 983.04 MHz, the oversampling factor is 4 / 1, or The symbol rate is 1966.08 MHz, the oversampling factor is 2 / 1, or The symbol rate is 1310.7 MHz, the oversampling factor is 3 / 1, or The symbol rate is 2621.44 MHz, the oversampling factor is 3 / 2, or The symbol rate is 3932.16 MHz, the oversampling factor is 1 / 1, or The symbol rate is 5242.8 MHz, the oversampling factor is 3 / 4, or The symbol rate is 2949.12 MHz, the oversampling factor is 4 / 3, or The symbol rate is 5898.24 MHz, and the oversampling factor is 2 / 3.

8. The method according to any one of claims 4 to 7, characterized in that At least one parameter group among the plurality of parameter groups further includes a roll-off factor, wherein the roll-off factor and the symbol rate satisfy one of the following: The symbol rate is 983.04 MHz or 1966.08 MHz, the roll-off factor is 3, or The symbol rate is 983.04 MHz or 1966.08 MHz, the roll-off factor is 2, or The symbol rate is 983.04 MHz or 1966.08 MHz, the roll-off factor is 1, or The symbol rate is 983.04 MHz or 1966.08 MHz, the roll-off factor is 0.5, or The symbol rate is 1310.7 MHz or 2621.44 MHz, the roll-off factor is 2, or The symbol rate is 1310.7 MHz or 2621.44 MHz, the roll-off factor is 1.25, or The symbol rate is 1310.7 MHz or 2621.44 MHz, the roll-off factor is 0.5, or The symbol rate is 1966.08 MHz or 3932.16 MHz, the roll-off factor is 1, or The symbol rate is 1966.08 MHz or 3932.16 MHz, the roll-off factor is 0.5, or The symbol rate is 1966.08 MHz or 3932.16 MHz, the roll-off factor is 0.25, or The symbol rate is 2621.4 MHz or 5242.8 MHz, the roll-off factor is 0.5, or The symbol rate is 2621.4 MHz or 5242.8 MHz, the roll-off factor is 0.125, or The symbol rate is 2949.12 MHz or 5898.24 MHz, the roll-off factor is 0.33, or The symbol rate is 2949.12 MHz or 5898.24 MHz, and the roll-off factor is 0.

125.

9. The method according to any one of claims 4 to 8, characterized in that At least one parameter group among the plurality of parameter groups further includes a first bandwidth, where the first bandwidth is used to transmit the first signal, and the symbol rate and the first bandwidth satisfy at least one of the following: The symbol rate is 983.04 MHz or 1966.08 MHz, the first bandwidth is 4 GHz, or The symbol rate is 983.04 MHz or 1966.08 MHz, the first bandwidth is 3 GHz, or The symbol rate is 983.04 MHz or 1966.08 MHz, the first bandwidth is 2 GHz, or The symbol rate is 983.04 MHz or 1966.08 MHz, the first bandwidth is 1.5 GHz, or The symbol rate is 1310.7 MHz or 2621.44 MHz, the first bandwidth is 4 GHz, or The symbol rate is 1310.7 MHz or 2621.44 MHz, the first bandwidth is 3 GHz, or The symbol rate is 1310.7 MHz or 2621.44 MHz, the first bandwidth is 2 GHz, or The symbol rate is 1966.08 MHz or 3932.16 MHz, the first bandwidth is 4 GHz, or The symbol rate is 1966.08 MHz or 3932.16 MHz, the first bandwidth is 3 GHz, or The symbol rate is 1966.08 MHz or 3932.16 MHz, the first bandwidth is 2.5 GHz, or The symbol rate is 2621.4 MHz or 5242.8 MHz, the first bandwidth is 4 GHz, or The symbol rate is 2621.4 MHz or 5242.8 MHz, the first bandwidth is 3 GHz, or The symbol rate is 2949.12 MHz or 5898.24 MHz, the first bandwidth is 4 GHz, or The symbol rate is 2949.12 MHz or 5898.24 MHz, and the first bandwidth is 3.4 GHz.

10. The method according to any one of claims 1 to 9, characterized in that At least one parameter group of the plurality of parameter groups further includes a first coefficient, the first coefficient being a signal number within each symbol of the first signal.

11. The method according to claim 10, characterized in that The first coefficient satisfies one of the following: The modulation mode of the first signal is quadrature amplitude modulation, and the first coefficient is 256; The modulation mode of the first signal is offset quadrature amplitude modulation, and the first coefficient is 512.

12. The method according to any one of claims 1 to 11, characterized in that The first association relationship is predefined by the protocol.

13. An information transmission method, characterized in that: The method comprises: Sending first information, where the first information is used to indicate a first index corresponding to the first signal, The first signal is carried and transmitted in a single carrier, 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, and the first parameter group is a parameter group associated with the first index. The parameter group includes sampling frequency, and / or symbol rate, wherein, The sampling frequency is equal to the sampling frequency corresponding to one subcarrier spacing of the multicarrier, and the symbol period determined based on the symbol rate is equal to the symbol period of one subcarrier spacing of the multicarrier; The first signal is transmitted according to the first parameter set.

14. The method according to claim 13, characterized in that Before sending the first information, the method further includes: Receive 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.

15. The method according to claim 13 or 14, characterized in that The sampling frequency is 15KHz×2 C , C is a positive integer.

16. The method according to any one of claims 13 to 15, 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 sampling frequency is 3932.16 MHz.

17. The method according to claim 16, characterized in that The modulation mode corresponding to at least one parameter group among the multiple parameter groups is orthogonal amplitude modulation, and the symbol rate is one of 983.04 MHz, 1310.7 MHz, 1966.08 MHz, 2621.4 MHz or 2949.12 MHz.

18. The method according to claim 16, characterized in that The modulation mode corresponding to at least one parameter group among the multiple parameter groups is offset quadrature amplitude modulation, and the symbol rate is one of 1966.08 MHz, 2621.44 MHz, 3932.16 MHz, 5242.8 MHz or 5898.24 MHz.

19. The method according to any one of claims 16 to 18, characterized in that At least one parameter group among the plurality of parameter groups further includes an oversampling factor, and the symbol rate and the oversampling factor satisfy at least one of the following: The symbol rate is 983.04 MHz, the oversampling factor is 4 / 1, or The symbol rate is 1966.08 MHz, the oversampling factor is 2 / 1, or The symbol rate is 1310.7 MHz, the oversampling factor is 3 / 1, or The symbol rate is 2621.44 MHz, the oversampling factor is 3 / 2, or The symbol rate is 3932.16 MHz, the oversampling factor is 1 / 1, or The symbol rate is 5242.8 MHz, the oversampling factor is 3 / 4, or The symbol rate is 2949.12 MHz, the oversampling factor is 4 / 3, or The symbol rate is 5898.24 MHz, and the oversampling factor is 2 / 3.

20. The method according to any one of claims 16 to 19, characterized in that At least one parameter group among the plurality of parameter groups further includes a roll-off factor, wherein the roll-off factor and the symbol rate satisfy one of the following: The symbol rate is 983.04 MHz or 1966.08 MHz, the roll-off factor is 3, or The symbol rate is 983.04 MHz or 1966.08 MHz, the roll-off factor is 2, or The symbol rate is 983.04 MHz or 1966.08 MHz, the roll-off factor is 1, or The symbol rate is 983.04 MHz or 1966.08 MHz, the roll-off factor is 0.5, or The symbol rate is 1310.7 MHz or 2621.44 MHz, the roll-off factor is 2, or The symbol rate is 1310.7 MHz or 2621.44 MHz, the roll-off factor is 1.25, or The symbol rate is 1310.7 MHz or 2621.44 MHz, the roll-off factor is 0.5, or The symbol rate is 1966.08 MHz or 3932.16 MHz, the roll-off factor is 1, or The symbol rate is 1966.08 MHz or 3932.16 MHz, the roll-off factor is 0.5, or The symbol rate is 1966.08 MHz or 3932.16 MHz, the roll-off factor is 0.25, or The symbol rate is 2621.4 MHz or 5242.8 MHz, the roll-off factor is 0.5, or The symbol rate is 2621.4 MHz or 5242.8 MHz, the roll-off factor is 0.125, or The symbol rate is 2949.12 MHz or 5898.24 MHz, the roll-off factor is 0.33, or The symbol rate is 2949.12 MHz or 5898.24 MHz, and the roll-off factor is 0.

125.

21. The method according to any one of claims 16 to 20, characterized in that At least one parameter group among the plurality of parameter groups further includes a first bandwidth, where the first bandwidth is used to transmit the first signal, and the symbol rate and the first bandwidth satisfy at least one of the following: The symbol rate is 983.04 MHz or 1966.08 MHz, the first bandwidth is 4 GHz, or The symbol rate is 983.04 MHz or 1966.08 MHz, the first bandwidth is 3 GHz, or The symbol rate is 983.04 MHz or 1966.08 MHz, the first bandwidth is 2 GHz, or The symbol rate is 983.04 MHz or 1966.08 MHz, the first bandwidth is 1.5 GHz, or The symbol rate is 1310.7 MHz or 2621.44 MHz, the first bandwidth is 4 GHz, or The symbol rate is 1310.7 MHz or 2621.44 MHz, the first bandwidth is 3 GHz, or The symbol rate is 1310.7 MHz or 2621.44 MHz, the first bandwidth is 2 GHz, or The symbol rate is 1966.08 MHz or 3932.16 MHz, the first bandwidth is 4 GHz, or The symbol rate is 1966.08 MHz or 3932.16 MHz, the first bandwidth is 3 GHz, or The symbol rate is 1966.08 MHz or 3932.16 MHz, the first bandwidth is 2.5 GHz, or The symbol rate is 2621.4 MHz or 5242.8 MHz, the first bandwidth is 4 GHz, or The symbol rate is 2621.4 MHz or 5242.8 MHz, the first bandwidth is 3 GHz, or The symbol rate is 2949.12 MHz or 5898.24 MHz, the first bandwidth is 4 GHz, or The symbol rate is 2949.12 MHz or 5898.24 MHz, and the first bandwidth is 3.4 GHz.

22. The method according to any one of claims 13 to 21, characterized in that At least one parameter group among the plurality of parameter groups further includes a first coefficient, where the first coefficient is a signal number within each single carrier symbol in the first signal.

23. The method according to claim 22, characterized in that The first coefficient satisfies one of the following: The modulation mode of the first signal is quadrature amplitude modulation, and the first coefficient is 256; The modulation mode of the first signal is offset quadrature amplitude modulation, and the first coefficient is 512.

24. 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 12; or, The communication device is caused to execute the method according to any one of claims 13 to 23.

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 12; or The logic circuit is configured to execute the method according to any one of claims 13 to 23.

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 12 to be performed; or, Such that the method of any one of claims 13 to 23 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 12 to be performed; or, Such that the method of any one of claims 13 to 23 is performed.

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