Communication method and communication apparatus

Abstract

Disclosed in embodiments of the present application are a communication method and a communication apparatus. The method comprises: acquiring a reference signal, wherein frequency domain resources of the reference signal include a first resource, a second resource, and a third resource, the first resource is used for carrying a demodulation reference signal (DMRS) sequence, the second resource is used for carrying first single-carrier data, the third resource is idle, the first resource, the second resource, and the third resource do not overlap, and the second resource is uniformly distributed on the frequency domain resources of the reference signal; and sending the reference signal. Some of resources other than frequency domain resources occupied by a DMRS sequence are used for carrying first single-carrier data, so that a reference signal is used to carry data, and spectral efficiency is improved. In addition, a second resource used for carrying first single-carrier data is uniformly distributed on frequency domain resources of a reference signal, so that a channel diversity gain can be obtained, and the PAPR of the reference signal is reduced, thereby ensuring that the PAPR of the reference signal is not higher than the PAPR of a data signal.

Description

A communication method and communication device

[0001] This application claims priority to Chinese Patent Application No. 202411658043.9, filed on November 18, 2024, entitled "A Communication Method and Communication Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communication technology, and in particular to a communication method and communication device. Background Technology

[0003] The Physical Downlink Shared Channel (PDSCH) and Physical Uplink Shared Channel (PUSCH) are used to transmit downlink and uplink data, respectively. In Long Term Evolution (LTE) and New Radio (NR), the PDSCH or PUSCH also transmits a demodulation reference signal (DMRS), which is used for channel estimation during data demodulation in the PDSCH or PUSCH.

[0004] In LTE and NR, DMRS designs can be divided into two types based on the frequency domain resources occupied by the DMRS: Type 1 and Type 2. Both Type 1 and Type 2 occupy only a portion of the subcarriers within a resource block (RB). For example, in Type 1, only six subcarriers within one RB are used to house the DMRS. The remaining subcarriers within an RB (i.e., not used for DMRS transmission) can be handled in two ways: 1) left idle; 2) carrying data. When using Type 1, power boosting can be applied to the subcarriers occupied by the DMRS to improve channel estimation performance. In Type 2, DMRS and data are frequency-division multiplexed. This improves spectral efficiency and reduces demodulation latency. For example, with time-division multiplexing of DMRS and data symbols, at least two symbols (one DMRS symbol and one data symbol) must be received before data demodulation can begin; now, only the DMRS symbol needs to be received before data demodulation can begin. In NR, processing mode 2 is only allowed when the data uses an orthogonal frequency division multiplexing (OFDM) waveform.

[0005] Some technologies propose supporting DMRS and data frequency division multiplexing when data uses discrete fourier transform spreading (DFT-s-OFDM) waveforms. However, this degrades the peak-to-average power ratio (PAPR) or cubic metric of DMRS symbols, making the PAPR / cubic metric of DMRS higher than that of DFT-s-OFDM data symbols, thus affecting transmission performance. Summary of the Invention

[0006] This application provides a communication method and a communication device that can improve the transmission performance of a physical shared channel.

[0007] In a first aspect, embodiments of this application provide a communication method that can be applied to the terminal side or the network side, such as a terminal device or a communication module in a terminal device, or a circuit or chip in a terminal device responsible for communication functions (such as a modem chip, also known as a baseband chip, or a system-on-chip (SoC) chip containing a modem core or a system-in-package (SIP) chip), such as a network device or a communication module in a network device, or a circuit or chip in a network device responsible for communication functions. The method includes:

[0008] A reference signal is acquired, the frequency domain resources of which include a first resource, a second resource, and a third resource. The first resource is used to carry a demodulated reference signal (DMRS) sequence, the second resource is used to carry first single-carrier data, and the third resource is left unused. The first, second, and third resources do not overlap with each other. The second resource is evenly distributed across the frequency domain resources of the reference signal. The reference signal is then transmitted.

[0009] By using a portion of the remaining resources (equal to the sum of the second and third resources), excluding the frequency domain resources occupied by the DMRS sequence, namely the second resource, to carry the first single-carrier data, it is possible to improve spectral efficiency by utilizing the reference signal to carry data while ensuring that the PAPR of the reference signal is no higher than that of the data signal (carrying the second single-carrier data). The data signal and the reference signal are time-division multiplexed. Furthermore, by uniformly distributing the second resource used to carry the first single-carrier data across the frequency domain resources of the reference signal, channel diversity gain can be obtained, while simultaneously reducing the PAPR of the reference signal, ensuring that the PAPR of the reference signal is no higher than that of the data signal.

[0010] In one possible design, the energy per resource element (RE) EPRE corresponding to the first resource is determined based on the first resource and the third resource. For example, without changing the reference signal (average) power, the energy corresponding to the third resource is superimposed on the first resource, thereby reducing the reference signal's PAPR and improving the receiver's channel estimation performance.

[0011] It should be understood that the EPRE corresponding to the first resource can also be replaced with the EPRE of the DMRS sequence.

[0012] In one possible design, when the size of the third resource is a0, the corresponding EPRE of the DMRS sequence is y0; when the size of the third resource is a1, the corresponding EPRE of the DMRS sequence is y1, and when a0 is greater than a1, y0 is greater than y1. That is, the larger the size of the third resource, the larger the EPRE of the DMRS sequence, and the smaller the size of the third resource, the smaller the EPRE of the DMRS sequence.

[0013] In one possible design, the modulation order of the first single-carrier data is less than the modulation order of the second single-carrier data, and the EPRE of the first single-carrier data is less than the EPRE of the second single-carrier data. The EPRE of the DMRS sequence is determined based on the EPRE of the first single-carrier data and the second resource. The second single-carrier data is carried by a data signal, and the time domain resources of the data signal do not overlap with those of the reference signal.

[0014] By setting the modulation order of the first single-carrier data to be less than that of the second single-carrier data, it can be ensured that the PAPR of the reference signal is not higher than that of the data signal (carrying the second single-carrier data). Furthermore, when the modulation order of the first single-carrier data is less than that of the second single-carrier data, the transmit power or EPRE of the first single-carrier data can be reduced without degrading its demodulation performance. Without changing the (average) power of the reference signal, the energy reduction of the first single-carrier data (equal to the EPRE reduction of the first single-carrier data multiplied by the size of the second resource) can be superimposed onto the DMRS sequence. This helps to reduce the PAPR of the reference signal and simultaneously improves the channel estimation performance at the receiver.

[0015] In one possible design, when the EPRE of the first single-carrier data is b0, the corresponding EPRE of the DMRS sequence is z0; when the EPRE of the first single-carrier data is b1, the corresponding EPRE of the DMRS sequence is z1, and when b0 is greater than b1, z0 is less than z1. That is, the higher the EPRE of the first single-carrier data, the lower the EPRE of the DMRS sequence; the lower the EPRE of the first single-carrier data, the higher the EPRE of the DMRS sequence.

[0016] In one possible design, a first indication message is received or transmitted. This first indication message indicates the ratio of the EPRE of the first single-carrier data to the EPRE of the DMRS sequence, and / or the ratio of the EPRE of the second single-carrier data to the EPRE of the DMRS sequence. The ratio of the EPRE of the first single-carrier data to the EPRE of the DMRS sequence, and / or the ratio of the EPRE of the second single-carrier data to the EPRE of the DMRS sequence, is used to demodulate the first single-carrier data and the second single-carrier data. The first indication message enables the demodulation of the first and second single-carrier data.

[0017] In one possible design, the size of the second resource is related to at least one of the following: the density of the DMRS sequence, the modulation and coding scheme (MCS) of the first and second single-carrier data, the DMRS sequence, the channel quality, and the distribution interval of the second resource. The second single-carrier data is carried by a data signal, and the time-domain resources of the data signal do not overlap with those of the reference signal.

[0018] The above design relates the size of the second resource to at least one of the following parameters: the density of the DMRS sequence, and the MCS of the first and second single-carrier data. This allows the size of the second resource to be dynamically adjusted as these parameters change, thereby improving transmission performance. For example, while ensuring that the PAPR of the reference signal is no higher than that of the data signal, the second resource can be increased, allowing the reference signal to carry more data. Alternatively, with the second resource fixed, the PAPR of the reference signal can be decreased.

[0019] In one possible design, the size of the second resource is related to the density of the DMRS sequence.

[0020] In one possible design, the size of the second resource is related to the modulation and coding scheme (MCS) of the first and second single-carrier data.

[0021] In one possible design, the size of the second resource is related to the channel quality.

[0022] In one possible design, the size of the second resource is related to the distribution interval of the second resource.

[0023] In one possible design, the size of the second resource being related to the DMRS sequence includes: the size of the second resource being related to at least one of the Zadoff-Chu (ZC) root and the length of the DMRS sequence, the DMRS sequence being generated based on the ZC sequence.

[0024] On the one hand, when the DMRS sequence is generated based on the ZC sequence, the PAPR corresponding to the DMRS sequence (equal to the PAPR when the reference signal only carries the DMRS sequence) is also affected by the ZC root and / or the length of the DMRS sequence (i.e., the size of the first resource). Therefore, when the reference signal simultaneously carries the DMRS sequence and the first single-carrier data, the PAPR is also affected by the ZC root and / or the length of the DMRS sequence. For example, given the DMRS sequence length, the PAPR of the reference signal is poor at certain root values. For example, given the ZC root value, the PAPR of the reference signal is affected by the length of the DMRS sequence. On the other hand, when the frequency domain resources and the first resource of the reference signal are fixed, the larger the second resource (or the smaller the third resource), the worse the PAPR of the reference signal. Considering both aspects, it is necessary to adjust the size of the second resource according to the ZC root and / or the DMRS sequence length to ensure that the PAPR of the reference signal is not higher than the PAPR of the data signal.

[0025] In one possible design, when the ZC root is q0, the PAPR corresponding to the DMRS sequence is x0, and the size of the corresponding second resource is N0 or located in the interval I0; when the ZC root is q1, the PAPR corresponding to the DMRS sequence is x1, and the size of the corresponding second resource is N1 or located in the interval I1. When x0 and x1 are close or the absolute value of their difference is less than a first threshold, N0 is equal to N1 or I0 is equal to I1.

[0026] The above design implements the allocation of the same second resource size or the same second resource size range to ZC roots with similar PAPR corresponding to the DMRS sequence, thereby reducing the design complexity of the second resource size or reducing the signaling overhead of the second resource size notification.

[0027] In one possible design, the first resource includes a first set of subcarriers, and the second resource includes a second set of subcarriers, wherein at least one subcarrier in the second set of subcarriers is adjacent to a subcarrier in the first set of subcarriers.

[0028] When the first resource is fixed or the first subcarrier set is determined, ensuring the second resource is evenly distributed across the frequency domain resources of the reference signal may lead to conflicts between the second and first resources. For example, subcarrier #1 from the first subcarrier set and subcarrier #2 from the second subcarrier set may overlap. Through the above design, when a conflict occurs, the position of subcarrier #2 is adjusted so that it is located to the left or right of subcarrier #1, i.e., subcarrier #2 is adjacent to subcarrier #1. This ensures that channel estimation performance and the first single-carrier data demodulation performance are not compromised, while also preventing significant degradation of the PAPR of the reference signal.

[0029] In one possible design, the reference signal and data signal are subjected to frequency domain spectral shaping (FDSS) and / or spectrum spreading (SE) processing, wherein the time domain resources of the data signal and the reference signal do not overlap. By performing FDSS and / or SE processing on the reference signal and data signal, it is ensured that the PAPR of the reference signal is not higher than that of the data signal.

[0030] In one possible design, the reference signal and the data signal use the same FDSS. This makes the FDSS transparent, meaning the terminal device is unaware of the FDSS, and the network device does not need to indicate the FDSS to the terminal device, reducing signaling overhead.

[0031] In one possible design, the spectral spread factor corresponding to the SE processing of the reference signal is greater than the spectral spread factor corresponding to the SE processing of the data signal. This ensures that the PAPR of the reference signal is not higher than the PAPR of the data signal.

[0032] Secondly, embodiments of this application provide a communication method that can be applied to a network side or a terminal device, such as a network device or a communication module in a network device, or a circuit or chip in a network device responsible for communication functions; or, a terminal device or a communication module in a terminal device, or a circuit or chip in a terminal device responsible for communication functions. The method includes:

[0033] A reference signal is received, wherein the frequency domain resources of the reference signal include a first resource, a second resource, and a third resource. The first resource is used to carry the demodulation reference signal DMRS sequence, the second resource is used to carry the first single-carrier data, and the third resource is left unused. The first resource, the second resource, and the third resource do not overlap with each other.

[0034] The second resource is evenly distributed across the frequency domain resources of the reference signal.

[0035] By using a portion of the remaining resources (equal to the sum of the second and third resources), excluding the frequency domain resources occupied by the DMRS sequence, namely the second resource, to carry the first single-carrier data, it is possible to improve spectral efficiency by utilizing the reference signal to carry data while ensuring that the PAPR of the reference signal is no higher than that of the data signal (carrying the second single-carrier data). The data signal and the reference signal are time-division multiplexed. Furthermore, by uniformly distributing the second resource used to carry the first single-carrier data across the frequency domain resources of the reference signal, channel diversity gain can be obtained, while simultaneously reducing the PAPR of the reference signal, ensuring that the PAPR of the reference signal is no higher than that of the data signal.

[0036] In one possible design, the energy per resource element (RE) EPRE corresponding to the first resource is determined based on the first resource and the third resource. For example, without changing the reference signal (average) power, the energy corresponding to the third resource is superimposed on the first resource, thereby reducing the reference signal's PAPR and improving the receiver's channel estimation performance.

[0037] It should be understood that the EPRE corresponding to the first resource can also be replaced with the EPRE of the DMRS sequence.

[0038] In one possible design, when the size of the third resource is a0, the corresponding EPRE of the DMRS sequence is y0; when the size of the third resource is a1, the corresponding EPRE of the DMRS sequence is y1, and when a0 is greater than a1, y0 is greater than y1. That is, the larger the size of the third resource, the larger the EPRE of the DMRS sequence, and the smaller the size of the third resource, the smaller the EPRE of the DMRS sequence.

[0039] In one possible design, the modulation order of the first single-carrier data is less than the modulation order of the second single-carrier data, and the EPRE of the first single-carrier data is less than the EPRE of the second single-carrier data. The EPRE of the DMRS sequence is determined based on the EPRE of the first single-carrier data and the second resource. The second single-carrier data is carried by a data signal, and the time domain resources of the data signal do not overlap with those of the reference signal.

[0040] By setting the modulation order of the first single-carrier data to be less than that of the second single-carrier data, it can be ensured that the PAPR of the reference signal is not higher than that of the data signal (carrying the second single-carrier data). Furthermore, when the modulation order of the first single-carrier data is less than that of the second single-carrier data, the transmit power or EPRE of the first single-carrier data can be reduced without degrading its demodulation performance. Without changing the (average) power of the reference signal, the energy reduction of the first single-carrier data (equal to the EPRE reduction of the first single-carrier data multiplied by the size of the second resource) can be superimposed onto the DMRS sequence. This helps to reduce the PAPR of the reference signal and simultaneously improves the channel estimation performance at the receiver.

[0041] In one possible design, when the EPRE of the first single-carrier data is b0, the corresponding EPRE of the DMRS sequence is z0; when the EPRE of the first single-carrier data is b1, the corresponding EPRE of the DMRS sequence is z1, and when b0 is greater than b1, z0 is less than z1. That is, the higher the EPRE of the first single-carrier data, the lower the EPRE of the DMRS sequence; the lower the EPRE of the first single-carrier data, the higher the EPRE of the DMRS sequence.

[0042] In one possible design, a first indication message is transmitted or received. This first indication message indicates the ratio of the EPRE of the first single-carrier data to the EPRE of the DMRS sequence, and / or the ratio of the EPRE of the second single-carrier data to the EPRE of the DMRS sequence. The ratio of the EPRE of the first single-carrier data to the EPRE of the DMRS sequence, and / or the ratio of the EPRE of the second single-carrier data to the EPRE of the DMRS sequence, is used to demodulate the first single-carrier data and the second single-carrier data. The first indication message enables the demodulation of the first and second single-carrier data.

[0043] In one possible design, the size of the second resource is related to at least one of the following: the density of the DMRS sequence, the modulation and coding scheme (MCS) of the first and second single-carrier data, the DMRS sequence, the channel quality, and the distribution interval of the second resource. The second single-carrier data is carried by a data signal, and the time-domain resources of the data signal do not overlap with those of the reference signal.

[0044] The above design relates the size of the second resource to at least one of the following parameters: the density of the DMRS sequence, and the MCS of the first and second single-carrier data. This allows the size of the second resource to be dynamically adjusted as these parameters change, thereby improving transmission performance. For example, while ensuring that the PAPR of the reference signal is no higher than that of the data signal, the second resource can be increased, allowing the reference signal to carry more data. Alternatively, with the second resource fixed, the PAPR of the reference signal can be decreased.

[0045] In one possible design, the size of the second resource is related to the density of the DMRS sequence.

[0046] In one possible design, the size of the second resource is related to the modulation and coding scheme (MCS) of the first and second single-carrier data.

[0047] In one possible design, the size of the second resource is related to the channel quality.

[0048] In one possible design, the size of the second resource is related to the distribution interval of the second resource.

[0049] In one possible design, the size of the second resource being related to the DMRS sequence includes: the size of the second resource being related to at least one of the Zadoff Chu (ZC) root and the length of the DMRS sequence, the DMRS sequence being generated based on the ZC sequence.

[0050] On the one hand, when the DMRS sequence is generated based on the ZC sequence, the PAPR corresponding to the DMRS sequence (equal to the PAPR when the reference signal only carries the DMRS sequence) is also affected by the ZC root and / or the length of the DMRS sequence (i.e., the size of the first resource). Therefore, when the reference signal simultaneously carries the DMRS sequence and the first single-carrier data, the PAPR is also affected by the ZC root and / or the length of the DMRS sequence. For example, given the DMRS sequence length, the PAPR of the reference signal is poor at certain root values. For example, given the ZC root value, the PAPR of the reference signal is affected by the length of the DMRS sequence. On the other hand, when the frequency domain resources and the first resource of the reference signal are fixed, the larger the second resource (or the smaller the third resource), the worse the PAPR of the reference signal. Considering both aspects, it is necessary to adjust the size of the second resource according to the ZC root and / or the DMRS sequence length to ensure that the PAPR of the reference signal is not higher than the PAPR of the data signal.

[0051] In one possible design, when the ZC root is q0, the PAPR corresponding to the DMRS sequence is x0, and the size of the corresponding second resource is N0 or located in the interval I0; when the ZC root is q1, the PAPR corresponding to the DMRS sequence is x1, and the size of the corresponding second resource is N1 or located in the interval I1. When x0 and x1 are close or the absolute value of their difference is less than a first threshold, N0 is equal to N1 or I0 is equal to I1.

[0052] The above design implements the allocation of the same second resource size or the same second resource size range to ZC roots with similar PAPR corresponding to the DMRS sequence, thereby reducing the design complexity of the second resource size or reducing the signaling overhead of the second resource size notification.

[0053] In one possible design, the first resource includes a first set of subcarriers, and the second resource includes a second set of subcarriers, wherein at least one subcarrier in the second set of subcarriers is adjacent to a subcarrier in the first set of subcarriers.

[0054] When the first resource is fixed or the first subcarrier set is determined, ensuring the second resource is evenly distributed across the frequency domain resources of the reference signal may lead to conflicts between the second and first resources. For example, subcarrier #1 from the first subcarrier set and subcarrier #2 from the second subcarrier set may overlap. Through the above design, when a conflict occurs, the position of subcarrier #2 is adjusted so that it is located to the left or right of subcarrier #1, i.e., subcarrier #2 is adjacent to subcarrier #1. This ensures that channel estimation performance and the first single-carrier data demodulation performance are not compromised, while also preventing significant degradation of the PAPR of the reference signal.

[0055] In one possible design, the reference signal and data signal undergo frequency domain spectral shaping (FDSS) and / or spectrum spreading (SE) processing, and the time domain resources of the data signal and the reference signal do not overlap. By performing FDSS and / or SE processing on the reference signal and data signal, it is ensured that the PAPR of the reference signal is not higher than that of the data signal.

[0056] In one possible design, the reference signal and the data signal use the same FDSS. This makes the FDSS transparent, meaning the terminal device is unaware of the FDSS, and the network device does not need to indicate the FDSS to the terminal device, reducing signaling overhead.

[0057] In one possible design, the spectral spread factor corresponding to the SE processing of the reference signal is greater than the spectral spread factor corresponding to the SE processing of the data signal. This reduces the PAPR of the reference signal, ensuring that the PAPR of the reference signal is not higher than the PAPR of the data signal.

[0058] Thirdly, embodiments of this application provide a communication device that performs the functions described in the first aspect above. For example, the communication device includes modules, units, or means corresponding to the operations involved in the first aspect. These modules, units, or means can be implemented in software, hardware, or a combination of software and hardware. The device includes:

[0059] The processing module is used to acquire a reference signal. The frequency domain resources of the reference signal include a first resource, a second resource, and a third resource. The first resource is used to carry the demodulated reference signal (DMRS) sequence, the second resource is used to carry the first single-carrier data, and the third resource is left unused. The first resource, the second resource, and the third resource do not overlap with each other.

[0060] The second resource is evenly distributed across the frequency domain resources of the reference signal;

[0061] A communication module is used to transmit the reference signal.

[0062] In one possible design, the per-resource-unit energy (EPRE) of the DMRS sequence is determined based on the first resource and the third resource.

[0063] In one possible design, when the size of the third resource is a0, the corresponding EPRE of the DMRS sequence is y0; when the size of the third resource is a1, the corresponding EPRE of the DMRS sequence is y1, and when a0 is greater than a1, y0 is greater than y1.

[0064] In one possible design, the modulation order of the first single-carrier data is less than the modulation order of the second single-carrier data, and the EPRE of the first single-carrier data is less than the EPRE of the second single-carrier data. The EPRE of the DMRS sequence is determined based on the EPRE of the first single-carrier data and the second resource. The second single-carrier data is carried by a data signal, and the time domain resources of the data signal do not overlap with those of the reference signal.

[0065] In one possible design, when the EPRE of the first single-carrier data is b0, the EPRE of the corresponding DMRS sequence is z0; when the EPRE of the first single-carrier data is b1, the EPRE of the corresponding DMRS sequence is z1, and when b0 is greater than b1, z0 is less than z1.

[0066] In one possible design, the communication module is further configured to receive or transmit first indication information, the first indication information being used to indicate the ratio of the EPRE of the first single-carrier data to the EPRE of the DMRS sequence, and / or the ratio of the EPRE of the second single-carrier data to the EPRE of the DMRS sequence;

[0067] The ratio of the EPRE of the first single-carrier data to the EPRE of the DMRS sequence, and / or the ratio of the EPRE of the second single-carrier data to the EPRE of the DMRS sequence, are used to demodulate the first single-carrier data and the second single-carrier data.

[0068] In one possible design, the size of the second resource is related to at least one of the following: the density of the DMRS sequence, the modulation and coding scheme (MCS) of the first and second single-carrier data, the DMRS sequence, the channel quality, and the distribution interval of the second resource. The second single-carrier data is carried by a data signal, and the time-domain resources of the data signal do not overlap with those of the reference signal.

[0069] In one possible design, the size of the second resource related to the DMRS sequence includes:

[0070] The size of the second resource is related to at least one of the Zadoff Chu (ZC) root and the length of the DMRS sequence, which is generated based on the ZC sequence.

[0071] In one possible design, when the ZC root is q0, the PAPR corresponding to the DMRS sequence is x0, and the size of the corresponding second resource is N0 or located in the interval I0; when the ZC root is q1, the PAPR corresponding to the DMRS sequence is x1, and the size of the corresponding second resource is N1 or located in the interval I1. When x0 and x1 are close or the absolute value of their difference is less than a first threshold, N0 is equal to N1 or I0 is equal to I1.

[0072] In one possible design, the first resource includes a first set of subcarriers, and the second resource includes a second set of subcarriers, wherein at least one subcarrier in the second set of subcarriers is adjacent to a subcarrier in the first set of subcarriers.

[0073] In one possible design, the processing module is further configured to perform frequency domain spectral shaping (FDSS) processing and / or spectral spreading (SE) processing on the reference signal and the data signal, wherein the time domain resources of the data signal and the reference signal do not overlap.

[0074] In one possible design, the reference signal and the data signal use the same FDSS.

[0075] In one possible design, the spectral spread factor corresponding to the SE processing of the reference signal is greater than the spectral spread factor corresponding to the SE processing of the data signal.

[0076] Fourthly, embodiments of this application provide a communication device that performs the functions described in the second aspect above. For example, the communication device includes modules, units, or means corresponding to the operations involved in the second aspect. These modules, units, or means can be implemented in software, hardware, or a combination of software and hardware. The device includes:

[0077] A communication module is used to receive a reference signal. The frequency domain resources of the reference signal include a first resource, a second resource, and a third resource. The first resource is used to carry a demodulated reference signal (DMRS) sequence, the second resource is used to carry first single-carrier data, and the third resource is left unused. The first resource, the second resource, and the third resource do not overlap with each other.

[0078] The second resource is evenly distributed across the frequency domain resources of the reference signal.

[0079] In one possible design, the per-resource-unit energy (EPRE) of the DMRS sequence is determined based on the first resource and the third resource.

[0080] In one possible design, when the size of the third resource is a0, the corresponding EPRE of the DMRS sequence is y0; when the size of the third resource is a1, the corresponding EPRE of the DMRS sequence is y1, and when a0 is greater than a1, y0 is greater than y1.

[0081] In one possible design, the modulation order of the first single-carrier data is less than the modulation order of the second single-carrier data, and the EPRE of the first single-carrier data is less than the EPRE of the second single-carrier data. The EPRE of the DMRS sequence is determined based on the EPRE of the first single-carrier data and the second resource. The second single-carrier data is carried by a data signal, and the time domain resources of the data signal do not overlap with those of the reference signal.

[0082] In one possible design, when the EPRE of the first single-carrier data is b0, the EPRE of the corresponding DMRS sequence is z0; when the EPRE of the first single-carrier data is b1, the EPRE of the corresponding DMRS sequence is z1, and when b0 is greater than b1, z0 is less than z1.

[0083] In one possible design, a communication module is configured to send or receive first indication information, the first indication information being used to indicate the ratio of the EPRE of the first single-carrier data to the EPRE of the DMRS sequence, and / or the ratio of the EPRE of the second single-carrier data to the EPRE of the DMRS sequence;

[0084] The ratio of the EPRE of the first single-carrier data to the EPRE of the DMRS sequence, and / or the ratio of the EPRE of the second single-carrier data to the EPRE of the DMRS sequence, are used to demodulate the first single-carrier data and the second single-carrier data.

[0085] In one possible design, the size of the second resource is related to at least one of the following: the density of the DMRS sequence, the modulation and coding scheme (MCS) of the first and second single-carrier data, the DMRS sequence, the channel quality, and the distribution interval of the second resource. The second single-carrier data is carried by a data signal, and the time-domain resources of the data signal do not overlap with those of the reference signal.

[0086] In one possible design, the size of the second resource related to the DMRS sequence includes:

[0087] The size of the second resource is related to at least one of the Zadoff Chu (ZC) root and the length of the DMRS sequence, which is generated based on the ZC sequence.

[0088] In one possible design, when the ZC root is q0, the PAPR corresponding to the DMRS sequence is x0, and the size of the corresponding second resource is N0 or located in the interval range I0; when the ZC root is q1, the PAPR corresponding to the DMRS sequence is x1, and the size of the corresponding second resource is N1 or located in the interval range I1. When x0 and x1 are close or the absolute value of their difference is less than a first threshold, N0 is equal to N1 or I0 is equal to I1.

[0089] In one possible design, the first resource includes a first set of subcarriers, and the second resource includes a second set of subcarriers, wherein at least one subcarrier in the second set of subcarriers is adjacent to a subcarrier in the first set of subcarriers.

[0090] In one possible design, the reference signal and the data signal are subjected to frequency domain spectral shaping (FDSS) processing and / or spectral spreading (SE) processing, and the time domain resources of the data signal do not overlap with those of the reference signal.

[0091] In one possible design, the reference signal and the data signal use the same FDSS.

[0092] In one possible design, the spectral spread factor corresponding to the SE processing of the reference signal is greater than the spectral spread factor corresponding to the SE processing of the data signal.

[0093] Fifthly, embodiments of this application provide a communication device, which includes a memory and one or more processors. The memory is used to store part or all of the computer program or instructions necessary for implementing the functions involved in the first aspect above. The one or more processors can execute the computer program or instructions, and when the computer program or instructions are executed, cause the communication device to implement the methods in any possible design or implementation of the first aspect above.

[0094] In one possible design, the communication device may further include an interface circuit, through which the processor communicates with other devices or components.

[0095] In one possible design, the communication device may also include the memory.

[0096] The aforementioned communication device may be a network device, a communication module in a network device, or a chip in a network device that is responsible for communication functions, such as a modem chip (also known as a baseband chip) or a SoC or SIP chip that contains a modem module.

[0097] The aforementioned communication device may also be a terminal device, a communication module in a terminal device, or a chip in a terminal device that is responsible for communication functions, such as a modem chip (also known as a baseband chip) or a SoC or SIP chip containing a modem module.

[0098] Sixthly, embodiments of this application provide a communication device, which includes a memory and one or more processors. The memory is used to store part or all of the computer program or instructions necessary to implement the functions involved in the second aspect above. The one or more processors are capable of executing the computer program or instructions, which, when executed, cause the communication device to implement the methods in any possible design or implementation of the second aspect above.

[0099] In one possible design, the communication device may further include an interface circuit, through which the processor communicates with other devices or components.

[0100] In one possible design, the communication device may also include the memory.

[0101] The aforementioned communication device may be a terminal device, a communication module in a terminal device, or a chip in a terminal device that is responsible for communication functions, such as a modem chip (also known as a baseband chip) or a SoC or SIP chip that contains a modem module.

[0102] The aforementioned communication device may also be a network device, a communication module in a network device, or a chip in a network device that is responsible for communication functions, such as a modem chip (also known as a baseband chip) or a SoC or SIP chip that contains a modem module.

[0103] Seventhly, this application provides a communication device, which may be a terminal device, a device within a terminal device, or a device compatible with a terminal device. The device may be a network device, a device within a network device, or a device compatible with a network device. The communication device may also be a chip system. The communication device can execute the method described in the first aspect. The functions of the communication device can be implemented in hardware or by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above functions. These units can be software and / or hardware. The operations performed by the communication device and its beneficial effects are described in the first aspect above, and will not be repeated here.

[0104] Eighthly, this application provides a communication device, which may be a network device, a device within a network device, or a device compatible with a network device. The device may be a terminal device, a device within a terminal device, or a device compatible with a terminal device. The communication device may also be a chip system. The communication device can execute the method described in the second aspect. The functions of the communication device can be implemented in hardware or by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above functions. These units can be software and / or hardware. The operations performed by the communication device and its beneficial effects are described in the second aspect above, and will not be repeated here.

[0105] Ninthly, this application provides a computer-readable storage medium for storing a computer program that, when executed, causes the method described in any one of the first to second aspects to be implemented.

[0106] In a tenth aspect, this application provides a computer program product including a computer program that, when executed, causes the method described in any one of the first to second aspects to be implemented.

[0107] Eleventhly, embodiments of this application provide a communication system including a network device and a terminal device. The network device is used to perform the steps in the first aspect described above, and the terminal device is used to perform the steps in the second aspect described above. Alternatively, the network device is used to perform the steps in the second aspect described above, and the terminal device is used to perform the steps in the first aspect described above.

[0108] In a twelfth aspect, a chip is provided, the chip including a processor and a communication interface for communicating with external or internal devices, the processor for implementing the methods of the above aspects.

[0109] In one possible design, the chip may further include a memory storing computer programs or instructions, which the processor executes, either from the stored computer programs or instructions or derived from other programs or instructions. When the computer program or instructions are executed, the processor implements the methods described above.

[0110] In one possible design, the chip can be integrated into a network device or a terminal device. Attached Figure Description

[0111] To more clearly illustrate the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. Obviously, those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0112] Figure 1 is a schematic diagram of a communication system provided in an embodiment of this application;

[0113] Figure 2 is a schematic diagram of the generation and demodulation process of an NR OFDM symbol (or "waveform");

[0114] Figure 3 is a schematic diagram of the AM-AM curve of a typical solid PA;

[0115] Figure 4 is a schematic diagram of the energy of each subcarrier with and without FDSS;

[0116] Figure 5 is a schematic diagram of OFDM / DFT-s-OFDM signal generation with sequence spread and FDSS;

[0117] Figure 6 is a schematic diagram of a PDSCH / PUSCH dual-symbol DMRS Type 1;

[0118] Figure 7 is a schematic diagram of a PDSCH / PUSCH dual-symbol DMRS Type 2;

[0119] Figure 8 is a schematic diagram of a type 1 DMRS CDM group without data = 1;

[0120] Figure 9 is a schematic diagram of a type 1 DMRS CDM group without data = 2.

[0121] Figure 10 is a schematic diagram of PAPR of PUSCH DMRS when using DFT-s-OFDM waveform;

[0122] Figure 11 is a flowchart illustrating a communication method provided in an embodiment of this application;

[0123] Figure 12A is a schematic diagram of resource distribution;

[0124] Figure 12B is a schematic diagram of another resource distribution;

[0125] Figure 13A is a schematic diagram of another resource distribution;

[0126] Figure 13B is a schematic diagram of another resource distribution;

[0127] Figure 14 is a comparative diagram of PAPR;

[0128] Figure 15 is a schematic diagram of demodulation performance;

[0129] Figure 16A is a schematic diagram showing the relationship between PAPR and the root of a reference signal;

[0130] Figure 16B is a schematic diagram of the relationship between PAPR and the root of another reference signal;

[0131] Figure 16C is a schematic diagram of the relationship between PAPR and the root of another reference signal;

[0132] Figure 16D is a schematic diagram of the relationship between PAPR and the root of another reference signal;

[0133] Figure 16E is a schematic diagram of the relationship between PAPR and the root of another reference signal;

[0134] Figure 17 is a schematic diagram of dividing the range of γ values ​​into different intervals;

[0135] Figure 18 is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0136] Figure 19 is a schematic diagram of another communication device provided in an embodiment of this application;

[0137] Figure 20 is a schematic diagram of the structure of a network device provided in an embodiment of this application;

[0138] Figure 21 is a schematic diagram of the structure of a terminal device provided in an embodiment of this application. Detailed Implementation

[0139] To facilitate understanding of the embodiments of this application, the following points will be explained first.

[0140] First, in this application, "for indicating" can include both direct and indirect indication. When describing an indication message as indicating A, it can include whether the indication message directly indicates A or indirectly indicates A, but does not necessarily mean that the indication message carries A.

[0141] The information indicated by the instruction is called the information to be instructed. In the specific implementation process, there are many ways to indicate the information to be instructed, such as, but not limited to, directly indicating the information to be instructed, such as the information to be instructed itself or its index. It can also be indirectly indicated by indicating other information, where there is a relationship between the other information and the information to be instructed. It can also indicate only a part of the information to be indicated, while the other parts are known or pre-agreed upon. For example, the instruction of specific information can be achieved by using a pre-agreed (e.g., protocol-defined) arrangement of various pieces of information, thereby reducing instruction overhead to some extent. At the same time, common parts of various pieces of information can be identified and indicated uniformly to reduce the instruction overhead caused by individually indicating the same information.

[0142] Second, in this application, "at least one" refers to one or more, and "more than one" refers to two or more (including two). Furthermore, in the embodiments of this application, "first," "second," and various numerical designations (e.g., "#1," "#2," etc.) are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application. The sequence numbers of the processes below do not imply the order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application. It should be understood that the objects described in this way can be interchanged where appropriate to describe solutions other than those in the embodiments of this application. Moreover, in the embodiments of this application, terms such as "S410" are merely identifiers for descriptive convenience and do not limit the order of execution steps.

[0143] Third, in the embodiments of this application, the words "exemplary" or "for example" are used to indicate that they are examples, illustrations, or descriptions. Any embodiment or design that is described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or design options. Specifically, the use of the words "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0144] Fourth, in the implementation of this application, "protocol" may refer to standard protocols in the field of communications, such as the NR protocol and related protocols applied in future communication systems, and this application does not limit it.

[0145] Fifth, in the embodiments of this application, the terms "of", "corresponding (relevant)", "corresponding", and "associate" can sometimes be used interchangeably. It should be noted that when their differences are not emphasized, their intended meanings are consistent.

[0146] Sixth, in the embodiments of this application, "under the circumstances" can also be replaced with "when..." or "if...". It should be noted that when the distinction is not emphasized, the meanings they express are the same.

[0147] Seventh, the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0148] In this application, "send" and "receive" indicate the direction of signal transmission. For example, "send information to XX" can be understood as the destination of the information being XX, and "send information" can include direct transmission or indirect transmission through other units or modules. "Receive information from YY" can be understood as the source of the information being YY, and "receive information" can include direct reception from YY or indirect reception from YY through other units or modules. Furthermore, "send" can also be understood as the "output" of a chip interface, and "receive" can be understood as the "input" of a chip interface. In other words, "send" or "receive" can occur between devices, such as network devices and terminal devices transmitting or receiving data via an air interface, or they can occur within a device, such as transmitting or receiving data between components, modules, chips, software modules, or hardware modules within a device via a bus, wiring, or interface.

[0149] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0150] The technical solutions provided in this application can be applied to various communication systems, such as: Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication systems, non-terrestrial network (NTN) systems, 5th generation (5G) systems or new radio (NR) systems and future communication systems, vehicle-to-X (V2X) communication, where V2X can include vehicle-to-network (V2N), vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P), etc., Long Term Evolution-V (LTE-V) technology for vehicle-to-everything (V2V) communication, vehicle-to-everything (V2X) communication, and machine-type communication. Communication, MTC, Internet of Things (IoT), Long Term Evolution of Machine (LTE-M), Machine to Machine (M2M), Device to Device (D2D), etc.

[0151] Figure 1 is a schematic diagram of a communication system provided in an embodiment of this application. As shown in Figure 1, the communication system 100 includes at least one network device, such as network device 111, network device 112, and network device 113 shown in Figure 1. The wireless communication system may also include at least one terminal device, such as terminal device 121, terminal device 122, terminal device 123, terminal device 124, terminal device 125, terminal device 126, and terminal device 127 shown in Figure 1.

[0152] For example, network devices and terminal devices can communicate with each other, including but not limited to: multi-site transmission, enhanced mobile broadband (eMBB) transmission, etc. For example, network devices 112 and 113 shown in FIG1 can transmit with terminal device 124 through multi-site transmission. Also, network device 112 shown in FIG1 can transmit with terminal devices 121, 122 and 123 through eMBB transmission.

[0153] For example, network devices can also communicate with each other, including but not limited to: backhaul. As shown in FIG1, network device 111 and network device 112 can communicate through backhaul, and network device 111 and network device 113 can also communicate through backhaul. In this case, network device 112 and network device 113 can act as relay nodes in the system.

[0154] For example, terminal devices can also communicate with each other, including but not limited to device-to-device (D2D) transmission. For example, terminal device 122 and terminal device 125 can communicate with each other via D2D transmission as shown in FIG1.

[0155] A network device is a network-side device with wireless transceiver capabilities. A network device can be a device in a radio access network (RAN) that provides wireless communication capabilities to terminal devices. Network devices can be cellular systems related to the 3rd Generation Partnership Project (3GPP), such as 5G mobile communication systems, or future-oriented evolution systems. Network devices can also be open radio access networks (O-RAN or ORAN), cloud radio access networks (CRAN), or wireless fidelity (WiFi) systems. For example, the network device can be a base station, an evolved NodeB (NodeB), a next-generation NodeB (gNB) in a 5G mobile communication system, a 3GPP subsequent evolution base station, a transmission reception point (TRP), an access node, a wireless relay node, or a wireless backhaul node in a WiFi system. In communication systems employing different radio access technologies (RATs), the names of devices with base station capabilities may differ. For example, in an LTE system, it may be called an eNB or eNodeB, and in a 5G or NR system, it may be called a gNB. This application does not limit the specific name of the base station. The network equipment may include one or more co-located or non-co-located transmitting and receiving points. Furthermore, the network equipment may include at least one of the following: one or more central units (CUs), one or more distributed units (DUs), and one or more radio units (RUs).

[0156] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an open RAN (ORAN) system, CU can also be called O-CU (open CU), DU can also be called O-DU (open DU), CU-CP can also be called O-CU-CP, CU-UP can also be called O-CU-UP, and RU can also be called O-RU. Any of the units among CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules. Exemplarily, the function of CU can be implemented by one entity or different entities. For example, the function of CU can be further divided, that is, the control plane and user plane can be separated and implemented through different entities, namely the control plane CU entity (i.e., the CU-CP entity) and the user plane CU entity (i.e., the CU-UP entity). The CU-CP entity and the CU-UP entity can be coupled with the DU to jointly complete the function of the access network device. For example, the CU (Complex Unit) is responsible for handling non-real-time protocols and services, implementing the functions of the radio resource control (RRC) and packet data convergence protocol (PDCP) layers. The DU (Digital Unit) is responsible for handling physical layer protocols and real-time services, implementing the functions of the radio link control (RLC), media access control (MAC), and physical (PHY) layers. This allows multiple network function entities to implement some of the functions of a radio access network device. These network function entities can be network elements in hardware devices, software functions running on dedicated hardware, or virtualized functions instantiated on a platform (e.g., a cloud platform). Network devices can also include active antenna units (AAUs). The AAU implements some physical layer processing functions, radio frequency processing, and related functions of the active antenna. Since RRC layer information ultimately becomes PHY layer information, or is derived from PHY layer information, in this architecture, higher-layer signaling, such as RRC layer signaling, can also be considered as being sent by the DU, or by the DU+AAU. It is understood that network devices can be one or more of the following: CU nodes, DU nodes, and AAU nodes. Furthermore, a CU can be classified as a network device in the radio access network (RAN) or as a network device in the core network (CN); this application does not impose any limitations on this.For example, in vehicle-to-everything (V2X) technology, the access network equipment can be a roadside unit (RSU). Multiple access network devices in the communication system can be base stations of the same type or different types. Base stations can communicate with terminal devices, or they can communicate with terminal devices through relay stations. In this embodiment, the device used to implement the network device function can be the network device itself, or a device that supports the network device in implementing that function, such as a chip system or a combination of devices or components that can implement the access network device function. This device can be installed in the network device. In this embodiment, the chip system can be composed of chips, or it can include chips and other discrete devices.

[0157] A terminal device is a user-side device with wireless transceiver capabilities. It can be a fixed device, mobile device, handheld device (e.g., mobile phone), wearable device, in-vehicle device, or a wireless device (e.g., communication module, modem, or chip system) built into the aforementioned devices. Terminal devices are used to connect people, things, and machines, and can be widely used in various scenarios, such as: cellular communication, device-to-device (D2D) communication, V2X communication, machine-to-machine / machine-type communications (M2M / MTC) communication, the Internet of Things (IoT), virtual reality (VR), augmented reality (AR), industrial control, self-driving, remote medical care, smart grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, drones, and robots. For example, a terminal device can be a handheld terminal in cellular communication, a communication device in D2D, an IoT device in MTC, a monitoring camera in intelligent transportation and smart cities, or a communication device on a drone, etc. Terminal devices are sometimes referred to as user equipment (UE), user terminal, user device, user unit, user station, terminal, access terminal, access station, UE station, remote station, mobile device, or wireless communication device, etc. A terminal device can also be a terminal device in an IoT system. IoT is an important component of future information technology development. Its main technical characteristic is connecting objects to networks through communication technology, thereby realizing an intelligent network of human-machine interconnection and machine-to-machine interconnection. In the embodiments of this application, IoT technology can achieve massive connectivity, deep coverage, and terminal power saving through, for example, narrowband (NB) technology. In the embodiments of this application, the device used to implement the functions of the terminal device can be the terminal device itself, or a device capable of supporting the terminal device to implement the functions, such as a chip system or a combination of devices or components capable of implementing the functions of the terminal device. This device can be installed in the terminal device.

[0158] Network devices and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed in the air on airplanes, balloons, and satellites. This application does not limit the scenario in which the network devices and terminal devices are located.

[0159] For example, the communication system 100 may further include an application function (AF) network element, which is a control plane network function provided by the operator's network for providing application layer information; the communication system 100 may also include a session management function (SMF) network element, which is a control plane network function provided by the operator's network. In this embodiment, when the communication system 100 includes both AF and SMF network elements, the AF can send service-related information to the network device through the SMF.

[0160] To facilitate understanding of the embodiments of this application, some technical terms used in this application are explained below. It should be noted that these explanations are intended to make the embodiments of this application easier to understand and should not be considered as limiting the scope of protection claimed by this application.

[0161] (1) Orthogonal frequency division multiplexing (OFDM)

[0162] Please refer to Figure 2, which is a schematic diagram of the generation and demodulation process of an NR OFDM symbol (or "waveform"). As shown in Figure 2, the signal {S(p)} is a frequency domain signal. The serial-to-parallel (S / P) conversion module converts M consecutive data S(kM), S(kM+1), ..., S(kM+M-1) into an M-dimensional data block S. k =[S(kM),S(kM+1),…,S(kM+M-1)] T The subscript k is the OFDM symbol number, while the superscript T indicates transpose. Through subcarrier mapping, S k The M data carried modulate N of the N subcarriers. sc N subcarriers, of which N sc =M, the rest (NN) sc The N subcarriers can be understood as being modulated by data 0. The N-dimensional data vector X k A set of N complex time-domain sampling points x is obtained through N-point IDFT. k =[x k (0),x k (1),…,x k (N-1)] T .

[0163] The next important step in generating OFDM symbols is adding a cyclic prefix (CP). This is specifically implemented by copying x. k The last G samples are appended to x.k At the beginning, we obtain the time-domain OFDM symbol. Therefore, an OFDM symbol contains valid data x k And cyclic prefix (redundant data).

[0164] CP can eliminate inter-symbol interference (ISI) caused by multipath propagation (the propagation phenomenon of radio signals reaching the receiver through two or more paths).

[0165] At the receiver, OFDM symbols are demodulated through inverse processing. Assuming time and frequency synchronization is available and the CP length is sufficient, the CP removal operation (i.e., removing the first G samples from the received signal) yields a data block with N samples completely free of ISI, which is still equal to x. k Circular convolution with the channel impulse response. The time-domain circular convolution can be converted into frequency-domain dot product using the DFT, and then channel equalization can be performed with low complexity using frequency-domain single-tap equalization.

[0166] S k This may include modulation symbols and / or redundant signal sampling points. Modulation symbols can be obtained by modulating the (coded) bit stream. Modulation schemes may include pulse amplitude modulation (PAM), phase shift keying (PSK), quadrature amplitude modulation (QAM), amplitude phase shift keying (APSK), etc.

[0167] Redundant signal sampling points can include phase tracking reference signal (PTRS) sampling points, demodulation reference signals, tone-preserving signals, etc.

[0168] It should be understood that when the number of transform points N satisfies certain constraints, such as N being a power of 2, 3, or 5, the IDFT can also be implemented using the efficient inverse fast fourier transform (IFFT). Correspondingly, the DFT can also be implemented using the efficient FFT. In the following text, IDFT and IFFT are interchangeable, as are DFT and fast fourier transform (FFT).

[0169] N sc This can be understood as the number of subcarriers within the transmission bandwidth. In the above text, N... sc=M. It should be understood that N sc It can also be greater than M. For example, in this patent application, S of length M will be specified. k Perform sequence expansion, assuming the length of the expanded sequence is equal to N. sc Therefore, N sc ≥M.

[0170] This application mainly relates to orthogonal frequency division multiplexing (DFT-s-OFDM) of discrete fourier transform spreading. The DFT-s-OFDM technology is introduced below.

[0171] (2) DFT-s-OFDM

[0172] As shown in Figure 2, DFT-s-OFDM defines the data block s transmitted in the time domain. k Before the OFDM processing, there is an additional DFT (Discrete Fourier Transform) process, that is, for each data block s containing M data points... k Perform an M-point DFT operation to obtain S k This operation gives DFT-s-OFDM signals the characteristics of a single carrier, resulting in a significantly lower peak-to-average power ratio (PAPR) than multi-carrier signals like OFDM. Therefore, with the same power amplifier, DFT-s-OFDM can provide greater output power and higher amplifier efficiency, thereby improving coverage and reducing power consumption. The coverage and power consumption advantages of DFT-s-OFDM are particularly evident on the terminal device side; therefore, in current versions of LTE and NR, DFT-s-OFDM is used for uplink transmission.

[0173] s k This can include modulation symbols and / or redundant signal sampling points. Modulation symbols can be obtained by modulating the (coded) bitstream. Modulation schemes can include PAM, PSK, QAM, offset quadrature amplitude modulation (OQAM), APSK, etc.

[0174] Redundant signal sampling points can include PTRS sampling points, unique words, zeros, etc.

[0175] Understandably, in practice, if s kFor waveforms including UW and zero-tail (ZT), the CP operation may not be required. That is, the solution in this application is applicable not only to CP DFT-s-OFDM waveforms, but also to waveforms such as ZT-DFT-s-OFDM and UW-DFT-s-OFDM.

[0176] Compared to OFDM, DFT-s-OFDM has a lower PAPR, which can improve the power transmission efficiency of mobile terminals, extend battery life, and reduce terminal costs.

[0177] (3) - Binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), and quadrature amplitude modulation (QAM)

[0178] Section 5.1 of the NR protocol 38.211 defines BPSK, Bit mapping schemes such as QSPK and QAM are used. QSPK can also be called 4QAM. Taking the BPSK modulation mapper as an example, it maps the i-th bit b(i) to the i-th BPSK symbol d(i) according to the following formula.

[0179] by Taking the modulation mapper as an example, it maps the i-th bit b(i) to the i-th bit according to the following formula. The symbol d(i).

[0180] It can be seen that, two adjacent symbols in a symbol sequence Symbols only have a 90-degree phase transition. Taking a QPSK modulation mapper as an example, it maps two consecutive bits to a QPSK symbol, as follows:

[0181] Where b(2i) and b(2i+1) represent the 2i-th and 2i+1-th bits respectively, and d(i) represents the i-th QPSK symbol. Taking a 16QAM modulation mapper as an example, it maps four consecutive bits to a 16QAM symbol, as follows:

[0182] Where b(4i), b(4i+1), b(4i+2) and b(4i+3) represent the 4i, 4i+1, 4i+2 and 4i+3 bits respectively, and d(i) represents the i-th 16QAM symbol.

[0183] Understandably, in future communication systems, Bit mapping schemes such as QSPK and QAM may be implemented using other methods.

[0184] (4) Power amplifier output power reduction

[0185] Before being transmitted through the antenna, a signal is amplified by a power amplifier (PA). One of the most fundamental ways to describe PA behavior is through its AM-AM (amplitude modulation-amplitude modulation) and AM-PM (amplitude modulation-phase modulation) characteristics. Figure 3 shows the AM-AM curve of a typical solid-state PA, illustrating the output power as a function of the input power. It can be seen that the amplifier has a linear operating region. Within this region, the amplifier's output power increases linearly with the input power. This can also be understood as the PA gain (i.e., the ratio of PA output power to input power) remaining constant, or the slope of the AM-AM curve remaining constant. As the input power continues to increase, the amplifier enters a nonlinear region, and the output power no longer increases linearly with the input power. The gain is compressed, and the slope of the AM-AM curve decreases. When the saturation output power is reached, i.e., the output power no longer increases with the input power, the slope becomes 0.

[0186] The nonlinear characteristics of a power amplifier (PA) affect the transmitted signal in two ways: in-band distortion and out-of-band distortion. In-band distortion mainly manifests as amplitude and phase distortion, degrading signal demodulation / detection performance. Out-of-band distortion mainly manifests as signal spectral spread / regeneration, increasing interference to users in adjacent channels. To mitigate the effects of PA nonlinearity, the input signal power can be appropriately reduced, i.e., input power back-off (IBO) or output power back-off (OBO) can be implemented to keep the PA operating within its linear region. However, this method comes at the cost of reduced PA efficiency.

[0187] (5) Peak to average power ratio (PAPR)

[0188] This can be understood as the ratio of peak power to average power. For a signal x(t), its peak power over a certain time interval (e.g., from t0 to t1) is... And the average power is PAPR can be represented as:

[0189] Communication signals (including OFDM and DFT-s-OFDM signals) are random signals. Their mean power can be considered a fixed value, while their peak power is a random variable. Therefore, PAPR is also a random variable. In statistics, the value of a random signal at a certain moment is often described by a probability density function. In the communications industry, PAPR is usually described using the complementary cumulative distribution function (CCDF) curve: the probability that the instantaneous power exceeds the mean power by xx dB is yy, or the proportion of the time when the instantaneous power exceeds the mean power by xx dB is yy. This can be expressed by the formula:

[0190] Where P(·) represents probability.

[0191] A higher PAPR for the PA input signal x(t) means a larger fluctuation range in input power. Therefore, to ensure the signal remains entirely within the linear amplification range, a greater power back-off is required. Thus, designing a signal with low PAPR can reduce PA OBO, increase transmission power, and improve coverage.

[0192] (6) Dangers of excessively high PAPR

[0193] Wireless communication systems require power amplification to transmit signals over long distances. Due to technological and equipment cost limitations, a power amplifier typically operates linearly within a certain range; exceeding this range leads to signal distortion. This distortion can prevent the receiving end from correctly interpreting the signal. To ensure the signal peak remains within the linear range of the power amplifier's amplification capability, the average power of the transmitted signal needs to be reduced. This approach results in lower power amplifier efficiency, or equivalently, a smaller coverage area.

[0194] (7) Single carrier

[0195] To reduce the PAPR of OFDM waveforms, a single-carrier waveform can be used to transmit data. A single carrier can be understood as: transmitting data with N... d A sequence S of symbols m Perform N d Point Fourier transform yields the frequency domain signal S m The signal is mapped onto the corresponding subcarrier, weighted (i.e., precoding, frequency windowing, power control, etc.), and then subjected to inverse Fourier transform to obtain the time-domain signal X. m Finally, a cyclic prefix can be optionally added. A single carrier includes, but is not limited to, the following waveforms:

[0196] Single carrier-quadrature amplitude modulation (SC-QAM) waveforms, single carrier-offset quadrature amplitude modulation (SC-OQAM) waveforms, DFT-s-OFDM waveforms, etc. In the embodiments of this application, network devices and terminal devices can communicate using the single carrier described above.

[0197] (8) Pilot

[0198] Also known as reference signals, the pilots involved in this application include, but are not limited to, the following reference signals: demodulation reference signals (DMRS), channel state information-reference signals (CSI-RS), tracking reference signals (TRS), sounding reference signals (SRS), phase tracking reference signals (PT-RS), positioning reference signals (PRS), and sensing reference signals (SeRS).

[0199] It is understood that the pilot signal in this application may also be any signal that can be carried in OFDM or a single carrier, other than the reference signals listed above. These will not be listed here.

[0200] (9) OFDM pilot

[0201] OFDM pilots can be transmitted directly on each subcarrier in the frequency domain, and the OFDM pilots and data subcarriers are orthogonal and interference-free. The receiver can estimate the channel corresponding to each OFDM pilot subcarrier through the OFDM pilots, and then obtain the channel of the entire frequency band, that is, all subcarriers. Then, it can perform equalization (removing channel effects) and demodulation on the data carried on other data subcarriers.

[0202] (10) DMRS

[0203] Information is sent from the sender, transmitted through a transmission channel, and received at the receiver. Because the information may change during transmission (due to noise, fading, etc.), the received information may differ from the transmitted information. To accurately reconstruct the correct information, it is necessary to understand what changes the information underwent during transmission; therefore, the reference signal (RS) is introduced.

[0204] The transmitting and receiving ends agree on a known signal (RS) beforehand. RS is transmitted along with the information to be sent in the transmission channel. After receiving the signal (RS'), the receiving end compares the differences between RS and RS' to understand the changes that have occurred in the information in the transmission channel, performs channel characteristic estimation, and obtains the channel characteristic H. Based on the channel characteristic H, the received information can be restored to the correct transmitted information.

[0205] The demodulation reference signal (DMRS) is used for channel estimation during demodulation.

[0206] (11) Modulation and Coding Scheme (MCS) Table

[0207] The MCS table is a combination of different modulation schemes and coding efficiencies (code rates) used to define the number of effective bits that a resource element (RE) can carry. Table 6.1.4.1-1 of 3GPP TS 38.214 (Table 1 below) is given below, where q takes the value 1 or 2.

[0208] Table 1 MCS Table

[0209] As shown in Table 1, the first column gives the MCS index value (ranging from 0 to 31), and the second column gives the modulation order corresponding to the modulation scheme. For example, a modulation order of 1 corresponds to pi / 2-BPSK modulation, a modulation order of 2 corresponds to QPSK modulation, a modulation order of 4 corresponds to 16QAM, and a modulation order of 6 corresponds to 64QAM. The third column gives the result of the code rate R multiplied by 1024. For example, when the MCS index value is 2, the result of R multiplied by 1024 is 193, so R is 193 / 1024. The fourth column gives the number of effective bits that a RE can carry, which is equal to the modulation order multiplied by the code rate. For example, when the MCS index value is 2, the modulation order is 2, and R is 193 / 1024, so 2 multiplied by 193 / 1024 equals 0.3770.

[0210] (12) Frequency-domain spectral shaping (FDSS) + spectrum extension (SE)

[0211] Data symbols can be subjected to FDSS and / or SE to reduce PAPR. FDSS can be understood as the frequency signal S to be transmitted. k Perform a windowing process. Mathematically, this can be described by the following formula:

[0212] Where C[i] represents the i-th coefficient of the FDSS window function. Mapped to N corresponding to transmission bandwidth sc = On M subcarriers.

[0213] Assume S k [i] is a QPSK symbol with an amplitude of 1, while the FDSS window function is a root raised cosine (RRC) with a roll-off factor of 0.2. Additionally, N sc The value is 720. Please refer to Figure 4, which is a schematic diagram of the energy of each subcarrier with and without FDSS. As shown in Figure 4, S is given. k [i] and The amplitude, with index i on the horizontal axis. S k [i] corresponds to the "No FDSS" case, while This corresponds to the case of "FDSS:RRC with β=0.2".

[0214] As can be seen from Figure 4, FDSS makes certain The amplitude (energy) is significantly reduced, causing the corresponding S k [i] Detection / demodulation performance loss. To mitigate / avoid the performance loss caused by FDSS, the S... k Perform sequence expansion, as shown in Figure 5. Sequence expansion can also be called spectral expansion (SE). At this point, N... sc >M. S k Perform sequence expansion to obtain N sc Long sequences Then perform FDSS to obtain N. sc Long sequences and The relationship is:

[0215] The sequence / spectral spread factor can be defined as follows:

[0216] Understandably, other definitions of sequence / spectral spread factors also exist, such as:

[0217] In this application, the first sequence / spectral spread factor definition can be used.

[0218] Generally, the FDSS window function is symmetric. Taking this into account, a common sequence expansion method is:

[0219] Here, mod represents the remainder operation, for example, 12 mod 5 = 2.

[0220] It is understandable that there are multiple ways to extend sequences, and this application does not limit the methods of sequence extension.

[0221] PDSCH can be used to transmit downlink data, while PUSCH is used to transmit uplink data. In LTE and NR, DMRS is used for channel estimation during data symbol demodulation in PDSCH or PUSCH. The time-frequency resources of DMRS symbols are as follows:

[0222] Time-domain resources: Single-symbol DMRS and double-symbol DMRS: Based on the number of symbols occupied by the DMRS, it is divided into two types: single-symbol DMRS and double-symbol DMRS.

[0223] Frequency domain resources: Based on the different maximum number of antenna ports supported, DMRS can be divided into the following two categories:

[0224] Type 1: It is distributed in a comb shape in the frequency domain and is divided into two code division multiplexing (CDM) groups, denoted as CDM group 0 and CDM group 1. Code division multiplexing is used between ports within the group.

[0225] Single symbol DMRS: Supports a maximum of 4 antenna ports, with port numbers 1000, 1001, 1002, and 1003. Ports 1000 and 1001 belong to CDM group 0, while ports 1002 and 1003 belong to CDM group 1.

[0226] Dual-symbol DMRS: Supports a maximum of 8 antenna ports, with port numbers 1000, 1001, 1002, 1003, 1004, 1005, 1006, and 1007. Ports 1000, 1001, 1004, and 1005 belong to CDM group 0, while ports 1002, 1003, 1006, and 1007 belong to CDM group 1.

[0227] Please refer to Figure 6, which is a schematic diagram of a PDSCH / PUSCH dual-symbol DMRS Type 1. In the time domain, under normal CP, one slot contains 14 symbols, corresponding to indices 0-13. In the frequency domain, one resource block (RB) contains 12 subcarriers, corresponding to indices 0-11. One resource element (RE) corresponds to one symbol in the time domain and one subcarrier in the frequency domain. One antenna port has 6 REs within one RB for transmitting pilot signals. It should be understood that the term "pilot" can also be replaced with "DMRS". Within the time-frequency resource grid corresponding to one symbol and one RB, the first CDM group occupies subcarriers with even-numbered indices, i.e., subcarrier indices 0, 2, 4, 6, 8, 10. The second CDM group occupies subcarriers with odd-numbered indices, i.e., subcarrier indices 1, 3, 5, 7, 9, 11.

[0228] Type 2: Compared to Type 1, Type 2 reduces the frequency domain density of the DMRS. In this case, one antenna port has 4 REs within one RB for transmitting pilot signals.

[0229] Type 2 is divided into three CDM groups, denoted as CDM group 0, CDM group 1 and CDM group 2, and code division multiplexing is used between ports within the group.

[0230] Single symbol DMRS: Supports a maximum of 6 antenna ports, divided into: CDM group 0, including ports 1000 and 1001; CDM group 1, including ports 1002 and 1003; CDM group 2, including ports 1004 and 1005.

[0231] Dual Symbol DMRS: Supports a maximum of 12 antenna ports, divided into: CDM group 0, containing ports 1000, 1001, 1006, and 1007; CDM group 1, containing ports 1002, 1003, 1008, and 1009; and CDM group 2, containing ports 1004, 1005, 1010, and 1011.

[0232] Please refer to Figure 7, which is a schematic diagram of a PDSCH / PUSCH dual-symbol DMRS Type 2. Within the time-frequency resource grid corresponding to one symbol and one RB, the first CDM group occupies subcarriers with indices 0, 1, 6, and 7. The second CDM group occupies subcarriers with indices 2, 3, 8, and 9. The third CDM group occupies subcarriers with indices 4, 5, 10, and 11.

[0233] When using OFDM waveforms, NR allows frequency division multiplexing (FDM) for DMRS and data. For a single CDM group or a single port, whether Type 1 or Type 2, it only occupies a portion of the subcarriers within a single RB. For example, for Type 1, port 1000 only occupies subcarriers 0, 2, 4, 6, 8, and 10. NR defines the concept of "number of DMRS CDM groups without data." Based on the number of DMRS CDM groups without data and the antenna port number, it can be determined whether the remaining subcarriers of an RB (which do not carry DMRS sequences) carry data or are empty. The specific determination method is shown in Table 2.

[0234] Table 2 determines whether DMRS symbols carry data and the method of data carrying based on the number of DMRS CDM groups without data and the antenna port number.

[0235] If a subcarrier is vacant, the power allocated to the vacant subcarrier is superimposed on the DMRS sequence. For example, for type 1, port 1000 occupies subcarriers 0, 2, 4, 6, 8, and 10, meaning these subcarriers carry the DMRS sequence, and the number of DMRS CDM groups without data is 2. In this case, the power superposition method increases the DMRS sequence power by 1 time (or 3 dB), which is beneficial for improving channel estimation performance and data symbol demodulation performance.

[0236] In NR, PUSCH supports two waveforms: OFDM waveform and DFT-s-OFDM waveform.

[0237] NR PDSCH only supports OFDM waveforms. Additionally, for a given DMRS type, the relationship between the number of DMRS CDM groups without data and the waveform is shown in Table 3.

[0238] Table 3. Relationship between the number of DMRS CDM groups without data and waveforms for different DMRS types.

[0239] It can be seen that when using OFDM waveforms, DMRS sequences and data FDM are allowed, and the DMRS sequence is a QPSK symbol sequence. However, when using DFT-s-OFDM waveforms, NR does not allow DMRS sequences and data FDM.

[0240] However, when using OFDM waveforms, DMRS symbols have high PAPR, resulting in large nonlinear distortion of the signal after passing through the power amplifier.

[0241] In NR, PUSCH supports two waveforms: OFDM waveforms and DFT-s-OFDM waveforms. When using DFT-s-OFDM waveforms, the DMRS sequence has two designs: low PAPR sequence generation type 1 and low PAPR sequence generation type 2. When using low PAPR sequence generation type 2 and the DMRS sequence length M... zc When the value is ≥36, the DMRS sequence is generated based on the ZC sequence, as follows:

[0242] Where, N zc It is less than M zc The largest prime number. For example, M zc =60, then N zc =59. `mod` represents the modulo operation. For example, 12 mod 5 = 2. `q` represents the root index of the ZC sequence, and `q` is related to N. zc Coprime, q is defined as follows:

[0243] Where u∈{0,1,…,29}; if 36≤M zc When ≤60, v=0, and 72≤M zc When v is in this case, it can take the values ​​0 and 1. This indicates rounding down to the nearest integer.

[0244] The above NR design q values ​​constitute a set. Since u has 30 possible values, we can deduce that if v = 0, then the set... It contains 30 q values; if v can take the values ​​0 and 1, then the set... It contains 60 q values.

[0245] In q and N zc Under coprime constraints, q has (N zc -1) possible values, forming a set

[0246] As you can see, It is a set A subset of.

[0247] For example, when M zc When N = 36,zc =31, at this time at this time and same.

[0248] For example, when M zc When N = 72, zc =71, at this time at this time It is a set A subset of.

[0249] Please refer to Figure 10, which is a schematic diagram of the PAPR of PUSCH DMRS when using a DFT-s-OFDM waveform. Again, it is emphasized that this DMRS only carries the DMRS sequence and does not carry data. The parameters involved in generating the DMRS are configured as M. zc =72, and N zc =71. The IDFT size is 4096. The q values ​​are 2, 5, 16, and 50, and they come from the set... As can be seen, the PAPR of DMRS is related to the q value. Figure 10 also shows the PAPR of the QPSK DFT-s-OFDM signal (labeled "DFTs, QPSK" in the figure). It can be seen that when the q value is 2 and 5, the PAPR of DMRS is lower than that of the QPSK DFT-s-OFDM signal; when the q value is 16 and 50, the PAPR of DMRS exceeds that of the QPSK DFT-s-OFDM signal. In this application, when using the DFT-s-OFDM waveform, frequency division multiplexing of DMRS sequence and data is allowed, that is, DMRS also carries data to improve spectral efficiency. It should be noted here that DMRS carrying data will worsen the PAPR of DMRS, that is, DMRS carrying data has a worse PAPR than DMRS without data. One possible case is that the PAPR of DMRS without data is lower than that of the data signal (e.g., when the q value is 2 and 5), but when data is carried, the PAPR of DMRS exceeds that of the data signal.

[0250] Therefore, the technical problem to be solved by this application is: when the reference signal carries data, how to ensure that the PAPR of the reference signal is not higher than that of the single-carrier data signal, wherein the reference signal and the single-carrier data signal are time-division multiplexed, and the data carried by the reference signal and the sequence carried by the reference signal are FDM.

[0251] This also points out that DFT-s-OFDM waveforms may be used in PDSCH in future communication systems. For example, in the sub-52.6 GHz band, NR uses OFDM waveforms for downlink and both OFDM and DFT-s-OFDM waveforms for uplink. OFDM waveforms have advantages such as flexible frequency division multiplexing, good compatibility with multiple-input multiple-output (MIMO) technology, and good downlink performance in frequency-selective channels. However, OFDM waveforms have a higher PAPR, requiring a larger backoff to allow the power amplifier to operate in the linear range. DFT-s-OFDM waveforms have good compatibility with OFDM, and their PAPR is significantly lower than OFDM. With the same power amplifier, they can achieve greater output power than OFDM waveforms, thus they can be used to improve uplink coverage. In the sub-52.6 GHz band, the linearity of the power amplifier is worse and the output power is lower, so the necessity of low PAPR waveforms is stronger. In addition, in the high-frequency band, the frequency selectivity of the channel is weaker, so the performance advantage of OFDM is reduced. In summary, DFT-s-OFDM waveforms are likely to see wider application in frequency bands above 52.6 GHz. For example, standards for frequency bands above 52.6 GHz may introduce DFT-s-OFDM waveforms in the downlink.

[0252] As shown in Figure 11, Figure 11 is a flowchart illustrating a communication method provided in an embodiment of this application. The first device is a terminal device, and the second device can be a network device; or, the first device is a network device, and the second device is a terminal device. The method mainly includes the following steps:

[0253] S1101, the first device acquires the reference signal.

[0254] Acquiring the reference signal can be understood as either generating the reference signal or retrieving the reference signal from the memory.

[0255] S1102, the first device sends a reference signal to the second device.

[0256] The frequency domain resources of the reference signal include a first resource, a second resource, and a third resource. The first resource is used to carry the demodulated reference signal (DMRS) sequence, the second resource is used to carry the first single-carrier data, and the third resource is left unused. The first, second, and third resources do not overlap. By using a portion of the remaining resources (equal to the sum of the second and third resources), i.e., the second resource, excluding the frequency domain resources occupied by the DMRS sequence, to carry the first single-carrier data, it is possible to utilize the reference signal to carry data and improve spectral efficiency while ensuring that the PAPR of the reference signal is not higher than that of the data signal (carrying the second single-carrier data). The data signal and the reference signal are time-division multiplexed.

[0257] The frequency domain resources of the reference signal can also be replaced by: the transmission bandwidth of the reference signal; the frequency domain resources occupied by the reference signal; and the frequency domain resources allocated / scheduled for the reference signal. The reference signal can be a DMRS, and the first single-carrier data can also be called frequency-division data.

[0258] In the embodiments of this application, the PAPR of the reference signal can be ensured to be no higher than that of the data signal through the following implementation methods. These implementation methods can be used independently or in combination, and this application does not limit their use.

[0259] In one implementation, the second resource is uniformly distributed across the frequency domain resources of the reference signal. By uniformly distributing the second resource used to carry the first single-carrier data across the frequency domain resources of the reference signal, channel diversity gain can be obtained, while reducing the PAPR of the reference signal and ensuring that the PAPR of the reference signal is not higher than that of the data signal.

[0260] For example, the transmission bandwidth of DMRS includes N sc With N subcarriers, the overhead of DMRS is 1 / 2, and the remaining N sc 50% of the 2 subcarriers are used to carry frequency-division data, that is, N sc Four subcarriers carrying frequency-divided data can be mapped across the entire transmission bandwidth at intervals of four. Figure 12A illustrates one resource distribution. Considering the DMRS overhead is 1 / 2, and the DMRS RE occupies even-numbered index REs (i.e., subcarriers 0, 2, 4, 6, 8, 10, ...), with frequency-divided data mapped at intervals of four, the frequency-divided data can occupy subcarriers 1, 5, 9, ..., while subcarriers 3, 7, 11, ... remain unused. Alternatively, as shown in Figure 12B, another resource distribution can be implemented. With frequency-divided data mapped at intervals of four, the frequency-divided data can occupy subcarriers 3, 7, 11, ..., while subcarriers 1, 5, 9, ... remain unused.

[0261] For example, the cost of DMRS is 1 / 3, with the remaining 2N... sc 50% of the 3 subcarriers are used to carry frequency-division data, that is, N scData can be carried on 3 subcarriers and mapped at intervals of 3 across the entire transmission bandwidth. Figure 13A illustrates another resource distribution. Considering the DMRS OH is 1 / 3 and the DMRS RE occupies subcarriers 0, 3, 6, 9, ..., and frequency-divided data is mapped at intervals of 3, then the frequency-divided data can occupy subcarriers 1, 4, 7, 10, ..., while subcarriers 2, 5, 8, 11, ... remain vacant. Figure 13B illustrates another resource distribution. With frequency-divided data mapped at intervals of 3, the frequency-divided data can occupy subcarriers 2, 5, 8, 11, ..., while subcarriers 1, 4, 7, 10, ... remain vacant.

[0262] Optionally, the first resource includes a first set of subcarriers, and the second resource includes a second set of subcarriers, wherein at least one subcarrier in the second set of subcarriers is adjacent to a subcarrier in the first set of subcarriers.

[0263] When the first resource is fixed or the first subcarrier set is determined, ensuring the second resource is evenly distributed across the frequency domain resources of the reference signal may lead to conflicts between the second and first resources. For example, subcarrier #1 from the first subcarrier set and subcarrier #2 from the second subcarrier set may overlap. Through the above implementation, when a conflict occurs, the position of subcarrier #2 is adjusted so that it is located to the left or right of subcarrier #1, i.e., subcarrier #2 is adjacent to subcarrier #1. This ensures that channel estimation performance and the first single-carrier data demodulation performance are not compromised, while also preventing significant degradation of the PAPR of the reference signal.

[0264] In this embodiment, the second resource is uniformly distributed across the frequency domain resources of the reference signal. To improve channel estimation performance, the first resource can also be uniformly distributed across the frequency domain resources of the reference signal. However, the spacing between two adjacent first resources and the spacing between two adjacent second resources may not be equal. For example, the overhead of DMRS is 1 / 3, leaving 2N. sc 75% of the 3 subcarriers are used to carry frequency-division data, that is, N sc Two subcarriers carry frequency-division multiplexing (FDM) data. FDM data can be mapped across the entire transmission bandwidth at intervals of two, which can lead to collisions. DMRS RE occupies subcarriers 0, 3, 6, 9, 12, ..., while FDM data occupies subcarriers 1, 3, 5, 7, 9, 11, ... It can be seen that collisions occur at subcarriers 3 and 9.

[0265] In case of collisions, the RE position of the frequency division multiplexing (FDM) data can be adjusted, while the DMRS RE position remains unchanged. Adjusting the RE position of the FDM data can include shifting it by one RE towards a lower or higher frequency direction, or performing puncturing (without mapping the data). For example, for the colliding subcarriers 3 and 9 mentioned above, if shifting one RE to the left, the FDM data will occupy subcarriers 1, 2, 5, 7, 8, 11, ...; if shifting one RE to the right, the FDM data will occupy subcarriers 1, 4, 5, 7, 10, 11, ...; or, if puncturing is performed, the FDM data will occupy subcarriers 1, 5, 7, 11, ... . The specific choice of shifting one RE towards a lower or higher frequency direction or puncturing the RE can be determined by the network device and then indicated to the terminal device via signaling, or it can be agreed upon between the network device and the terminal device.

[0266] In another implementation, the energy per resource unit (RE) EPRE corresponding to the first resource is determined based on the first and third resources. For example, without changing the reference signal (average) power, the energy corresponding to the third resource can be superimposed on the first resource, thereby reducing the reference signal's PAPR and improving the receiver's channel estimation performance.

[0267] It should be understood that the EPRE corresponding to the first resource can also be replaced with the EPRE of the DMRS sequence.

[0268] Furthermore, when the size of the third resource is a0, the corresponding EPRE of the DMRS sequence is y0; when the size of the third resource is a1, the corresponding EPRE of the DMRS sequence is y1. When a0 is greater than a1, y0 is greater than y1. That is, the larger the size of the third resource, the larger the EPRE of the DMRS sequence; the smaller the size of the third resource, the smaller the EPRE of the DMRS sequence.

[0269] Alternatively, the modulation order of the first single-carrier data is less than the modulation order of the second single-carrier data, and the EPRE of the first single-carrier data is less than the EPRE of the second single-carrier data. The EPRE of the DMRS sequence is determined based on the EPRE of the first single-carrier data and the second resource. The second single-carrier data is carried by a data signal, and the time-domain resources of the data signal do not overlap with those of the reference signal. Wherein, the first single-carrier data is frequency-division multiplexing (FDM) data, and the second single-carrier data is non-FDM data.

[0270] By setting the modulation order of the first single-carrier data to be less than that of the second single-carrier data, it can be ensured that the PAPR of the reference signal is not higher than that of the data signal (carrying the second single-carrier data). Furthermore, when the modulation order of the first single-carrier data is less than that of the second single-carrier data, the transmit power or EPRE of the first single-carrier data can be reduced without degrading its demodulation performance. Without changing the (average) power of the reference signal, the energy reduction of the first single-carrier data (equal to the EPRE reduction of the first single-carrier data multiplied by the size of the second resource) can be superimposed onto the DMRS sequence. This helps to reduce the PAPR of the reference signal and simultaneously improves the channel estimation performance at the receiver.

[0271] Furthermore, when the EPRE of the first single-carrier data is b0, the corresponding EPRE of the DMRS sequence is z0; when the EPRE of the first single-carrier data is b1, the corresponding EPRE of the DMRS sequence is z1. When b0 is greater than b1, z0 is less than z1. That is, the higher the EPRE of the first single-carrier data, the lower the EPRE of the DMRS sequence; the lower the EPRE of the first single-carrier data, the higher the EPRE of the DMRS sequence.

[0272] For example, the transmission bandwidth of DMRS includes N sc There are 1 subcarrier, and the overhead of DMRS is 1 / Δ, so the number of frequency division data is 1 / Δ. Furthermore, the EPRE of the frequency division data is reduced by R dB, and the EPRE of the DMRS RE is:

[0273] in, This represents the total energy of the frequency-divided data. This represents the total energy allocated to the DMRS RE. The number of DMRS REs.

[0274] Optionally, the terminal device may receive first indication information from the network device, or the network device may send first indication information to the terminal device. The first indication information is used to indicate the ratio of the EPRE of the frequency-division data to the EPRE of the DMRS sequence, and / or the ratio of the EPRE of the non-frequency-division data to the DMRS sequence. After receiving the first indication information, the terminal device can demodulate the frequency-division data and the non-frequency-division data according to the ratio of the EPRE of the frequency-division data to the DMRS sequence, and / or the ratio of the EPRE of the non-frequency-division data to the DMRS sequence.

[0275] In the NR protocol, network devices do not directly notify the DMRS EPRE and the EPRE of non-frequency division multiplexing (FDM) data. Instead, they notify the ratio of the EPRE of non-FDM data to the DMRS EPRE. Assuming this design is followed, it is necessary to calculate the ratio of the EPRE of FDM data to the DMRS EPRE, and the ratio of the EPRE of non-FDM data to the DMRS EPRE. Specifically:

[0276] The ratio of frequency division multiplexing (FDM) data EPRE to DMRS EPRE:

[0277] The ratio of non-frequency division multiplexing (FDM) data EPRE to DMRS EPRE:

[0278] The terminal device has obtained N sc , The two ratios mentioned above can be determined using parameters such as Δ and R, and are used for demodulation of frequency-division and non-frequency-division data. It should be understood that these two ERPE ratio formulas can be pre-configured on the terminal device.

[0279] It should be understood that N sc , The parameters Δ and R can be obtained directly or indirectly. For example, the terminal device can determine Δ based on the DMRS type. For instance, when using DMRS type 1, Δ = 2. Alternatively, the terminal device can determine Δ through frequency division multiplexing (FDM) data mapping. In other words, the terminal device is informed which REs are used to carry frequency-division data, which can obviously be determined based on the mapping method. For example, multiple sets of R values ​​are pre-configured between terminal devices and network devices, and then an R value is selected from the multiple sets of R values ​​through signaling instructions.

[0280] Considering that non-frequency division data uses QPSK modulation, while frequency division data uses pi / 2-BPSK modulation with reduced ERPE R dB, DMRS OH = 1 / 2, transmission bandwidth is 270 RB, and ZC root index is 2. Figure 14 is a comparative schematic diagram of PAPR. This scheme is represented by the label "scheme 2" in Figure 14. equals N sc / 4, meaning 50% of the REs other than the DMRS RE are used for data transmission. Another scheme is labeled "scheme 1" in Figure 14, where the data volume of frequency division is equal to N. sc / 2, meaning all REs except the DMRS RE are used for data transmission. Consider the portion of the complementary cumulative distribution function (CCDF) less than 0.01. It can be seen that at R=3, scheme 2 has a lower PAPR than scheme 1. It can be seen that in this scheme, the DMRS PAPR is already lower than the data signal PAPR at R=3 (represented by the label "DFTs, QPSK" in Figure 14), while scheme 1 requires R=7 to make the DMRS PAPR lower than the data signal PAPR. In this scheme, the DMRS PAPR at R=4.77 is lower than the PAPR of scheme 1 at R=7.

[0281] It should be noted that significantly reducing the EPRE of the frequency-division multiplexing (FDM) data, i.e., taking a very large value for R, may cause the FDM data to become the bottleneck of demodulation performance. This is because the larger R is, the lower the transmit power of the FDM data, the lower the receive signal-to-noise ratio, and the worse the demodulation performance. It can be predicted that when R is large enough, the FDM data may become the bottleneck of demodulation performance. Consider a PUSCH containing two signals: a DMRS and a data signal. The channel is a static tapped delay line-C model with a delay spread of 220ns and a channel coding rate of 0.3508. The other parameters are the same as in Figure 14. Figure 15 is a schematic diagram of demodulation performance. The curve in the figure represents the demodulation block error rate (BLER) when all REs other than the DMRS RE are used to transmit data, and the horizontal axis is the demodulation signal-to-noise ratio. It can be seen that when R increases from 0 to 3, the demodulation performance deteriorates by 0.3dB, and when R increases from 3 to 7, the demodulation performance deteriorates further by 0.6dB.

[0282] Therefore, in the embodiments of this application, the R value will not be too large when the expected PAPR is achieved, which can avoid the problem of frequency division data becoming a bottleneck for demodulation performance.

[0283] In another implementation, the size of the second resource is related to at least one of the following: the density of the DMRS sequence, the modulation and coding scheme (MCS) of the first and second single-carrier data, the DMRS sequence, the channel quality, and the distribution interval of the second resource. The second single-carrier data is carried by a data signal, and the time-domain resources of the data signal do not overlap with those of the reference signal.

[0284] By relating the size of the second resource to at least one of the parameters, such as the density of the DMRS sequence and the MCS of the first and second single-carrier data, the size of the second resource can be dynamically adjusted as these parameters change, thereby improving transmission performance. For example, while ensuring that the PAPR of the reference signal is no higher than that of the data signal, the second resource can be increased, allowing the reference signal to carry more data. Alternatively, with the second resource fixed, the PAPR of the reference signal can be decreased.

[0285] First, the size of the second resource is related to the density of the DMRS sequence.

[0286] As can be seen from the above, the second resource should be distributed as evenly as possible across the frequency domain resources of the reference signal, which requires... Introduce constraints. Assume... To ensure a strictly uniform mapping of frequency-division data, the amount of frequency-division data is... It is possible Fluctuations, such as within ±5%, will not have a significant impact on PAPR.

[0287] Table 4 gives the values ​​of DMRS OH=1 / 2 and 1 / 3. The values ​​and the intervals between adjacent frequency division data. The first row of Table 4 shows the proportion of frequency division data used in the remaining REs other than the DMRS RE.

[0288] Table 4 DMRS OH = 1 / 2 and 1 / 3 Values ​​and the interval between two adjacent frequency divisions

[0289] Second, the size of the second resource is related to the modulation and coding scheme (MCS) of the first and second single-carrier data. The MCS can characterize the modulation order and coding rate, as described earlier in Table 1. The first single-carrier data can be frequency-division multiplexing (FDM) data, and the second single-carrier data can be non-FDM data.

[0290] (1) It is related to the difference in modulation order between frequency-division data and non-frequency-division data.

[0291] The modulation order of frequency-division multiplexing (FM) data is less than or equal to the modulation order of non-FM data. Under the design objective that the PAPR of the DMRS should not exceed the PAPR of the data signal, the larger the difference in modulation orders, the higher the tolerable degree of PAPR degradation of the DMRS (due to the DMRS sequence and data FDM), i.e., the larger the difference in orders. It can be larger and / or R can be smaller.

[0292] (2) It is correlated with the MCS difference between frequency-divided data and non-frequency-divided data.

[0293] The larger the MCS difference, the greater the potential decrease in EPRE for frequency-division data, assuming the frequency-division data does not become a bottleneck for demodulation performance; that is, the larger R is. Under the condition of achieving the desired PAPR level or DMRS ERPE, combined with the formula... Increasing R is equivalent to increasing

[0294] Third, the size of the second resource is related to the DMRS sequence. Specifically, the size of the second resource is related to at least one of the Zadoff Chu (ZC) root and the length of the DMRS sequence, which is generated based on the ZC sequence.

[0295] Consider DMRS sequences generated based on ZC sequences. It should be understood that ZC sequences can be defined in either the frequency domain or the time domain. The case defined in the time domain is described below. First, a time-domain ZC sequence can be defined as:

[0296] Where θ represents the ZC root in the time domain, and N zc Coprime, and N zc It is a prime number. The range of values ​​for θ can be {1, 2, ..., N}. zc -1}, or it could be

[0297] After obtaining N zc Long time-domain ZC sequence {x θ After (n)}, N can be used zc Point DFT yields N zc A long frequency domain sequence {X(n)}. After obtaining {X(n)}, if N zc Less than M zc For example, N zc It is less than M zc The largest prime number can be obtained by cyclic expansion M. zc Long DMRS sequences. If N zc Greater than M zc For example, N zc It is greater than M zc The smallest prime number can be obtained by truncating M. zc Long DMRS sequences.

[0298] first, It is related to the ZC root that generates the DMRS sequence. For example, given N zc In the case where the PAPR of the DMRS sequence corresponding to root q0 is lower than the PAPR of the DMRS sequence corresponding to root q1, then the PAPR of root q0 is used. When the value is greater than or equal to the root q1 The PAPR corresponding to the DMRS sequence is equal to the PAPR of the DMRS when the DMRS only carries the DMRS sequence.

[0299] Secondly The PAPR of a DMRS sequence is related to its length. For example, with a fixed q value, the PAPR of a DMRS sequence is also related to its length. Generally, the longer the DMRS sequence, the lower the PAPR. Therefore, with a fixed q value, the longer the DMRS sequence, the lower the PAPR. The value monotonically remains constant as the DMRS sequence length increases. For example, within a certain range of DMRS sequence lengths, The value increases monotonically with the length of the DMRS sequence. For example, within a certain range of DMRS sequence lengths, The value remains approximately constant as the length of the DMRS sequence increases.

[0300] The above explanation is from the perspective of a single ZC root. Related to ZC roots. If a separate configuration is set up for each ZC root... This could lead to high implementation complexity or increased signaling overhead. For example, a redesign would be necessary whenever the ZC root changes. and instructing new ones via signaling value.

[0301] To address the aforementioned issues, ZC roots with similar PAPRs corresponding to DMRS sequences can be assigned the same second resource size or the same second resource size range. This reduces the design complexity of the second resource size or the signaling overhead for second resource size notification. Specifically, when the ZC root is q0, the corresponding PAPR of the DMRS sequence is x0, and the size of the corresponding second resource is N0 or within the range I0. When the ZC root is q1, the corresponding PAPR of the DMRS sequence is x1, and the size of the corresponding second resource is N1 or within the range I1. When x0 and x1 are similar or the absolute value of their difference is less than a first threshold, N0 equals N1 or I0 equals I1.

[0302] Assume the ZC sequence is defined in the frequency domain, with root q, and values ​​in the range {1,2,…,N}. zc -1}. Definition Where δ is the integer that minimizes the absolute value of γ. For example, N zc =71, and q=1, at which point δ=0, and γ=-1; for example, N zc =71, and q=70, at this time δ=1, and γ=1; for example, Nzc =71, and q=2, at which point δ=1, and γ=35; note that the range of γ is

[0303] As shown in Figures 16A-16E, Figures 16A-16E are M zc A schematic diagram illustrating the relationship between PAPR and the root for DMRS that do not simultaneously carry data (or DMRS that only carry DMRS sequences). Given an M zc (based on M) zc N can be determined zc By considering γ and q, a PAPR curve can be obtained. The horizontal axis of this curve represents PAPR, and the vertical axis represents CCDF. Based on this PAPR curve, the PAPR can be measured when CCDF is 0.01. In Figures 16A-16E, the horizontal axis represents γ, and the vertical axis represents PAPR when CCDF is 0.01. In Figure 16A, M... zc =36, N zc =31, M zc -N zc It equals 5. As you can see, the curve follows a "W" shape. In Figure 16B, M... zc =48, N zc =47, M zc -N zc Equals 1. In Figure 16C, M zc =60, N zc =59,M zc -N zc It also equals 1. As can be seen from Figures 16B and 16C, the curve exhibits a trend resembling the letter "M". In Figure 16D, M... zc =144, N zc =139, M zc -N zc It equals 5, the same as in Figure 16A. However, the curve now exhibits an "M" trend. In Figure 16E, M... zc =540, N zc =523, M zc -N zc The value is 17, which is a relatively large difference. As you can see, the curve shows a trend resembling the letter "W".

[0304] Based on the observed trends above, the range of γ values ​​can be divided into different intervals. For example, when the curve trend in Figures 16A-16E presents an "M" shape, γ can be divided into five intervals: interval 1, interval 2, interval 3, interval 4, and interval 5. Figure 17 illustrates this division of the γ value range into different intervals. If the PAPR of the DMRS sequence in interval A is lower than that in interval B (for example, interval A corresponds to interval 1 in Figure 17, while interval B corresponds to interval 2 in Figure 17), then the PAPR of the DMRS sequence in interval A... The value is greater than or equal to the value corresponding to interval B. value.

[0305] Assign the same ZC root with similar PAPR values. Given a value or range, a kind of Designed as follows:

[0306] Assume that PAPR is lowest in the interval T0 < |γ| ≤ T1; and that PAPR is lower in the interval T1 < |γ| ≤ T2 than in the interval |γ| > T2. No restrictions are placed on the PAPR relationship within the intervals |γ| ≤ T0 and T1 < |γ| ≤ T2, nor on the relationship within the intervals |γ| ≤ T0 and |γ| > T2. Under the above restrictions, A 10 Greater than A 01 A 21 Less than A 10 A 31 Less than A 20 .

[0307] It should be understood that the value of A (A) 00 A 01 A 10 ...) can be a specific integer value or a percentage (such as 50%). For example, when A is a specific integer value, then... It is directly equal to the value of A. When the value of A is a percentage... It's not directly equal to the value of A; an intermediate conversion is needed. For example, if the value of A is a percentage, it can be understood as a percentage of the data used for frequency division in the remaining REs (excluding DMRS REs). This is the so-called intermediate conversion. Alternatively, if A is a percentage, it can be understood as a percentage of all REs in the DMRS used for frequency division data.

[0308] Note that formula (4) assumes that the ZC sequence is defined in the frequency domain. Below, we give the ZC sequence defined in the time domain with the range of values ​​for θ as follows: time The design is as shown in formula (5):

[0309] If the ZC sequence is defined in the time domain and the range of θ is {1,…,N} zc -1} The design is as shown in formula (6):

[0310] Finally, it should be pointed out that formulas (4) to (6) give information about... The range. It is also possible to combine other factors within this range for optimal selection. For example, The range is [40%, 60%]. Combining this with the first implementation method described above, the frequency-divided data is mapped as evenly as possible, i.e. exist Fluctuations. Therefore, given a range of [40%, 60%], a preferred value is 50%.

[0311] In another implementation, FDSS and / or SE processing can be performed on the reference signal and data signal, where the time-domain resources of the data signal and the reference signal do not overlap. By performing FDSS and / or SE processing on the reference signal and data signal, it is ensured that the PAPR of the reference signal is not higher than that of the data signal.

[0312] Optionally, the reference signal and data signal use the same FDSS, making the FDSS transparent, meaning the terminal device is unaware of the FDSS, and the network device does not need to indicate the FDSS used to the terminal device. Alternatively, the reference signal and data signal can use different FDSSs, resulting in a lower PAPR for the reference signal.

[0313] Optionally, the spectral spread factor corresponding to the SE processing of the reference signal is greater than the spectral spread factor corresponding to the SE processing of the data signal, thereby ensuring that the PAPR of the reference signal is not higher than that of the data signal.

[0314] Furthermore, frequency-division data can also undergo spectrum spreading (SE), and the spectral spread factor corresponding to the SE processing of frequency-division data is greater than that corresponding to the SE processing of the data signal, thereby reducing the PAPR of frequency-division data. For example, the spectral spread factor in the data signal is 20%, while the spectral spread factor used for frequency-division data is 30% or 50%, etc.

[0315] The above design reduces the PAPR of the frequency-division data carried by the reference signal. The following section introduces a design to reduce the PAPR of the DMRS sequence carried by the reference signal, combining the two to reduce the PAPR of the reference signal, thereby ensuring that the PAPR of the reference signal is not higher than that of the data signal.

[0316] From the above description of ZC sequences, it can be seen that regardless of whether the ZC sequence is defined in the time domain or the frequency domain, the DMRS sequence is a set of N sequences. zc It is obtained by cyclically expanding a long frequency domain ZC sequence.

[0317] In a DMRS sequence design, N zc It is less than ρM ZC The largest prime number, where ρ is related to the spectral spread factor α, ρ decreases as α increases, and 0 < ρ ≤ 1.

[0318] In another DMRS sequence design, N zc It is less than The largest prime number.

[0319] Where, N zc and M ZC Please refer to the previous explanation of the ZC sequence.

[0320] Here, α can be equal to the spectral spread factor of frequency-division data or the spectral spread factor of non-frequency-division data. For example, α can be equal to the spectral spread factor of frequency-division data, thus allowing for a lower PAPR of the DMRS sequence. α can also be equal to the spectral spread factor of non-frequency-division data, making N... zc The larger the value, the wider the range of values ​​for the ZC root.

[0321] The various embodiments described herein can be independent solutions or combinations thereof based on their inherent logic, and all such solutions fall within the protection scope of this application.

[0322] It is understood that, in the above-described method embodiments, the methods and operations implemented by the terminal device can also be implemented by components (such as chips or circuits) that can be used in the terminal device, and the methods and operations implemented by the network device can also be implemented by components (such as chips or circuits) that can be used in the network device.

[0323] The foregoing mainly describes the solutions provided by the embodiments of this application from the perspective of various interactions. It is understood that each network element, such as a transmitting or receiving device, includes corresponding hardware structures and / or software modules to perform the aforementioned functions. Those skilled in the art should recognize that, based on the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed by hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art 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.

[0324] This application embodiment can divide the transmitting or receiving device into functional modules according to the above method examples. For example, each function can be divided into its own functional modules, or two or more functions can be integrated into one processing module. The integrated modules can be implemented in hardware or software. It should be noted that the module division in this application embodiment is illustrative and only represents one logical functional division; other division methods may be used in actual implementation. The following description uses the division of functional modules according to each function as an example.

[0325] It is understood that, in the above-described method embodiments, the methods and operations implemented by the network device can also be implemented by components (such as chips or circuits) that can be used in the network device, and the methods and operations implemented by the terminal device can also be implemented by components (such as chips or circuits) that can be used in the terminal device.

[0326] This application embodiment can divide network devices or terminal devices into functional modules according to the above method examples. For example, each function can be divided into its own functional modules, or two or more functions can be integrated into one processing module. The integrated modules can be implemented in hardware or software functional modules. It should be noted that the module division in this application embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods. The following description uses the division of functional modules according to each function as an example.

[0327] The method provided by the embodiments of this application has been described in detail above with reference to FIG11. The communication device provided by the embodiments of this application will be described in detail below with reference to FIGS. 18 and 19. It should be understood that the description of the device embodiments corresponds to the description of the method embodiments; therefore, any content not described in detail can be referred to the method embodiments above, and for the sake of brevity, will not be repeated here.

[0328] Please refer to Figure 18, which is a schematic diagram of a communication device provided in an embodiment of this application. This communication device can implement the steps or processes executed by the first device corresponding to those described in the method embodiments above. In one possible design, the communication device may include a processing module 1801 and a communication module 1802. Optionally, the communication device may further include a storage module for storing device program code and / or data.

[0329] The communication device can be a network-side device as described in the above embodiments, such as a network device or a communication module within a network device, or a circuit or chip within a network device responsible for communication functions. The communication device can also be a terminal-side device as described in the above embodiments, such as a terminal device or a communication module within a terminal device, or a circuit or chip within a terminal device responsible for communication functions.

[0330] Processing module 1801 is used to acquire a reference signal. The frequency domain resources of the reference signal include a first resource, a second resource, and a third resource. The first resource is used to carry a demodulated reference signal DMRS sequence, the second resource is used to carry first single-carrier data, and the third resource is unused. The first resource, the second resource, and the third resource do not overlap with each other.

[0331] The second resource is evenly distributed across the frequency domain resources of the reference signal;

[0332] The communication module 1802 is used to transmit the reference signal.

[0333] Optionally, the per-resource-unit energy (EPRE) of the DMRS sequence is determined based on the first resource and the third resource.

[0334] Optionally, when the size of the third resource is a0, the corresponding EPRE of the DMRS sequence is y0; when the size of the third resource is a1, the corresponding EPRE of the DMRS sequence is y1, and when a0 is greater than a1, y0 is greater than y1.

[0335] Optionally, the modulation order of the first single-carrier data is less than the modulation order of the second single-carrier data, and the EPRE of the first single-carrier data is less than the EPRE of the second single-carrier data. The EPRE of the DMRS sequence is determined based on the EPRE of the first single-carrier data and the second resource. The second single-carrier data is carried by a data signal, and the time domain resources of the data signal do not overlap with those of the reference signal.

[0336] Optionally, when the EPRE of the first single-carrier data is b0, the EPRE of the corresponding DMRS sequence is z0; when the EPRE of the first single-carrier data is b1, the EPRE of the corresponding DMRS sequence is z1, and when b0 is greater than b1, z0 is less than z1.

[0337] Optionally, the communication module 1802 is further configured to receive or send first indication information, the first indication information being used to indicate the ratio of the EPRE of the first single-carrier data to the EPRE of the DMRS sequence, and / or the ratio of the EPRE of the second single-carrier data to the EPRE of the DMRS sequence;

[0338] The ratio of the EPRE of the first single-carrier data to the EPRE of the DMRS sequence, and / or the ratio of the EPRE of the second single-carrier data to the EPRE of the DMRS sequence, are used to demodulate the first single-carrier data and the second single-carrier data.

[0339] Optionally, the size of the second resource is related to at least one of the following: the density of the DMRS sequence, the modulation and coding scheme (MCS) of the first single-carrier data and the second single-carrier data, the DMRS sequence, the channel quality, and the distribution interval of the second resource. The second single-carrier data is carried by a data signal, and the time-domain resources of the data signal do not overlap with those of the reference signal.

[0340] Optionally, the size of the second resource, which is related to the DMRS sequence, includes:

[0341] The size of the second resource is related to at least one of the Zadoff Chu (ZC) root and the length of the DMRS sequence, which is generated based on the ZC sequence.

[0342] Optionally, when the ZC root is q0, the PAPR corresponding to the DMRS sequence is x0, and the size of the second resource is N0 or located in the interval range I0; when the ZC root is q1, the PAPR corresponding to the DMRS sequence is x1, and the size of the second resource is N1 or located in the interval range I1. When x0 and x1 are close or the absolute value of their difference is less than the first threshold, N0 is equal to N1 or I0 is equal to I1.

[0343] Optionally, the first resource includes a first set of subcarriers, and the second resource includes a second set of subcarriers, wherein at least one subcarrier in the second set of subcarriers is adjacent to a subcarrier in the first set of subcarriers.

[0344] Optionally, the processing module 1801 is further configured to perform frequency domain spectral shaping (FDSS) processing and / or spectral spreading (SE) processing on the reference signal and the data signal, wherein the time domain resources of the data signal and the reference signal do not overlap.

[0345] Optionally, the reference signal and the data signal use the same FDSS.

[0346] Optionally, the spectral spread factor corresponding to the SE processing of the reference signal is greater than the spectral spread factor corresponding to the SE processing of the data signal.

[0347] In one possible design, when the communication device is a first device or a communication module within a first device, the function of the communication module 1802 can be implemented by a transceiver circuit. The function of the processing module 1801 can be implemented by one or more processors. Specifically, the processor may include a modem chip, or a system-on-a-chip (SoC) or SIP chip containing a modem core.

[0348] In one possible design, when the communication device is a circuit or chip responsible for communication functions in the first device, such as a modem chip or a system-on-a-chip (SoC) or SIP chip containing a modem core, the function of the communication module 1802 can be implemented by the interface circuitry or data transceiver circuitry on the aforementioned chip. The function of the processing module 1801 can be implemented by a circuit system in the aforementioned chip that includes one or more processors or processor cores.

[0349] It should be noted that the implementation of each module can also refer to the corresponding description of the method embodiment shown in FIG11, and execute the methods and functions performed by the first device in the above embodiment.

[0350] Please refer to Figure 19, which is a schematic diagram of another communication device provided in an embodiment of this application. This communication device can implement the steps or processes executed by the second device corresponding to those described in the method embodiments above. In one possible design, the communication device may include a communication module 1901. Optionally, the communication device may further include a storage module for storing device program code and / or data.

[0351] The communication device can also be a terminal-side device as described in the above embodiments, such as a terminal device or a communication module in a terminal device, or a circuit or chip in a terminal device responsible for communication functions. The communication device can also be a network-side device as described in the above embodiments, such as a network device or a communication module in a network device, or a circuit or chip in a network device responsible for communication functions.

[0352] Communication module 1901 is used to receive a reference signal. The frequency domain resources of the reference signal include a first resource, a second resource, and a third resource. The first resource is used to carry a demodulated reference signal (DMRS) sequence, the second resource is used to carry first single-carrier data, and the third resource is unused. The first resource, the second resource, and the third resource do not overlap with each other.

[0353] The second resource is evenly distributed across the frequency domain resources of the reference signal.

[0354] Optionally, the per-resource-unit energy (EPRE) of the DMRS sequence is determined based on the first resource and the third resource.

[0355] Optionally, when the size of the third resource is a0, the corresponding EPRE of the DMRS sequence is y0; when the size of the third resource is a1, the corresponding EPRE of the DMRS sequence is y1, and when a0 is greater than a1, y0 is greater than y1.

[0356] Optionally, the modulation order of the first single-carrier data is less than the modulation order of the second single-carrier data, and the EPRE of the first single-carrier data is less than the EPRE of the second single-carrier data. The EPRE of the DMRS sequence is determined based on the EPRE of the first single-carrier data and the second resource. The second single-carrier data is carried by a data signal, and the time domain resources of the data signal do not overlap with those of the reference signal.

[0357] Optionally, when the EPRE of the first single-carrier data is b0, the EPRE of the corresponding DMRS sequence is z0; when the EPRE of the first single-carrier data is b1, the EPRE of the corresponding DMRS sequence is z1, and when b0 is greater than b1, z0 is less than z1.

[0358] Optionally, the communication module 1901 is used to send or receive first indication information, the first indication information being used to indicate the ratio of the EPRE of the first single-carrier data to the EPRE of the DMRS sequence, and / or the ratio of the EPRE of the second single-carrier data to the EPRE of the DMRS sequence;

[0359] The ratio of the EPRE of the first single-carrier data to the EPRE of the DMRS sequence, and / or the ratio of the EPRE of the second single-carrier data to the EPRE of the DMRS sequence, are used to demodulate the first single-carrier data and the second single-carrier data.

[0360] Optionally, the size of the second resource is related to at least one of the following: the density of the DMRS sequence, the modulation and coding scheme (MCS) of the first single-carrier data and the second single-carrier data, the DMRS sequence, the channel quality, and the distribution interval of the second resource. The second single-carrier data is carried by a data signal, and the time-domain resources of the data signal do not overlap with those of the reference signal.

[0361] Optionally, the size of the second resource, which is related to the DMRS sequence, includes:

[0362] The size of the second resource is related to at least one of the Zadoff Chu (ZC) root and the length of the DMRS sequence, which is generated based on the ZC sequence.

[0363] Optionally, when the ZC root is q0, the PAPR corresponding to the DMRS sequence is x0, and the size of the second resource is N0 or located in the interval range I0; when the ZC root is q1, the PAPR corresponding to the DMRS sequence is x1, and the size of the second resource is N1 or located in the interval range I1. When x0 and x1 are close or the absolute value of their difference is less than the first threshold, N0 is equal to N1 or I0 is equal to I1.

[0364] Optionally, the first resource includes a first set of subcarriers, and the second resource includes a second set of subcarriers, wherein at least one subcarrier in the second set of subcarriers is adjacent to a subcarrier in the first set of subcarriers.

[0365] Optionally, the reference signal and the data signal are subjected to frequency domain spectral shaping (FDSS) processing and / or spectral spreading (SE) processing, and the time domain resources of the data signal and the reference signal do not overlap.

[0366] Optionally, the reference signal and the data signal use the same FDSS.

[0367] Optionally, the spectral spread factor corresponding to the SE processing of the reference signal is greater than the spectral spread factor corresponding to the SE processing of the data signal.

[0368] In one possible design, when the communication device is a second device or a communication module within a second device, the functionality of the communication module 1901 can be implemented by transceiver circuitry. Optionally, the communication device can also include a processing module. The functionality of this processing module can be implemented by one or more processors. Specifically, the processor may include a modem chip, or a system-on-a-chip (SoC) or SIP chip containing a modem core.

[0369] In one possible design, when the communication device is a circuit or chip responsible for communication functions in a second device, such as a modem chip or a system-on-a-chip (SoC) or SIP chip containing a modem core, the function of the communication module 1901 can be implemented by the interface circuitry or data transceiver circuitry on the aforementioned chip. Optionally, the communication device can also have a processing module. The function of this processing module can be implemented by a circuit system in the aforementioned chip that includes one or more processors or processor cores.

[0370] It should be noted that the implementation of each module can also correspond to the description of the method embodiment shown in FIG11, and execute the methods and functions performed by the second device in the above embodiment.

[0371] Figure 20 is a schematic diagram of a network device provided in an embodiment of this application. This network device can be applied to the system shown in Figure 1 to perform the functions of the network device in the above method embodiments, or to implement the steps or processes performed by the network device in the above method embodiments.

[0372] As shown in Figure 20, the network device includes a processor 2001 and a transceiver 2002. The transceiver 2002 includes a transmitter 2021, a receiver 2022, and an antenna 2023. The receiver 2022 can be used to receive transmission control information through the antenna 2023, and the transmitter 2021 can be used to send transmission feedback information to the distributed units through the antenna 2023. Optionally, the network device also includes a memory 2003. The processor 2001, transceiver 2002, and memory 2003 can communicate with each other through internal connection paths to transmit control and / or data signals. The memory 2003 stores computer programs, and the processor 2001 calls and runs the computer programs from the memory 2003 to control the transceiver 2002 to transmit and receive signals. Optionally, the network device may also include an antenna for transmitting uplink data or uplink control signaling output by the transceiver 2002 via wireless signals.

[0373] The processor 2001 described above can correspond to the processing module in Figure 18. The processor 2001 and the memory 2003 can be integrated into a single processing device. The processor 2001 is used to execute the program code stored in the memory 2003 to achieve the above functions. In specific implementations, the memory 2003 can be integrated into the processor 2001 or independent of the processor 2001.

[0374] The transceiver 2002 described above can correspond to the communication module in Figure 18 or Figure 19, and can also be called a transceiver unit or transceiver module. The transceiver 2002 may include a receiver (or receiver circuit) and a transmitter (or transmitter circuit). The receiver is used to receive signals, and the transmitter is used to transmit signals.

[0375] It should be understood that the network device shown in Figure 20 can implement the various processes involving the network device in the method embodiment shown in Figure 11. The operation and / or function of each module in the network device are respectively for implementing the corresponding processes in the above method embodiment. For details, please refer to the description in the above method embodiment; to avoid repetition, detailed descriptions are appropriately omitted here.

[0376] The processor 2001 described above can be used to execute the actions implemented internally by the network device as described in the preceding method embodiments, while the transceiver 2002 can be used to execute the actions described in the preceding method embodiments of sending data from the network device to the terminal device or receiving data from the terminal device. For details, please refer to the descriptions in the preceding method embodiments; they will not be repeated here.

[0377] The processor 2001 can be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. The processor 2001 can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, etc. The network device may also include a communication bus, which can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. The communication bus is used to realize the connection and communication between these components. In this embodiment, the transceiver 2002 is used for signaling or data communication with other node devices. The memory 2003 may include volatile memory, such as nonvolatile random access memory (NVRAM), phase change RAM (PRAM), magnetoresistive RAM (MRAM), etc., and may also include non-volatile memory, such as at least one disk storage device, electrically erasable programmable read-only memory (EEPROM), flash memory devices, such as NOR flash memory or NAND flash memory, semiconductor devices, such as solid-state disks (SSDs), etc. Optionally, the memory 2003 may also be at least one storage device located remotely from the aforementioned processor 2001. Optionally, the memory 2003 may also store a set of computer program code or configuration information. Optionally, the processor 2001 may also execute the program stored in the memory 2003. The processor can cooperate with the memory and transceiver to execute any of the methods and functions of the network device in the above-described embodiments.

[0378] Figure 21 is a schematic diagram of a terminal device provided in an embodiment of this application. This terminal device can be applied to the system shown in Figure 1 to perform the functions of the terminal device in the above method embodiments, or to implement the steps or processes executed by the terminal device in the above method embodiments.

[0379] As shown in Figure 21, the terminal device includes a processor 2101 and a transceiver 2102. The transceiver 2102 includes a transmitter 2121, a receiver 2122, and an antenna 2123. The transmitter 2121 can be used to send transmission control information to the terminal device through the antenna 2123, and the receiver 2122 can be used to receive transmission feedback information sent by the terminal device through the antenna 2123. Optionally, the terminal device also includes a memory 2103. The processor 2101, transceiver 2102, and memory 2103 can communicate with each other through internal connection paths to transmit control and / or data signals. The memory 2103 is used to store computer programs, and the processor 2101 is used to call and run the computer programs from the memory 2103 to control the transceiver 2102 to transmit and receive signals. Optionally, the terminal device may also include an antenna for transmitting uplink data or uplink control signaling output by the transceiver 2102 via wireless signals.

[0380] The processor 2101 described above can correspond to the processing module in Figure 18. The processor 2101 and the memory 2103 can be integrated into a single processing device. The processor 2101 is used to execute the program code stored in the memory 2103 to achieve the above functions. In specific implementations, the memory 2103 can be integrated into the processor 2101 or independent of the processor 2101.

[0381] The transceiver 2102 described above can correspond to the communication module in Figure 18 or Figure 19, and can also be called a transceiver unit or transceiver module. The transceiver 2102 may include a receiver (or receiver circuit) and a transmitter (or transmitter circuit). The receiver is used to receive signals, and the transmitter is used to transmit signals.

[0382] It should be understood that the terminal device shown in Figure 21 can implement all the processes involving the terminal device in the method embodiment shown in Figure 11. The operation and / or function of each module in the terminal device are respectively for implementing the corresponding processes in the above method embodiment. For details, please refer to the description in the above method embodiment; to avoid repetition, detailed descriptions are appropriately omitted here.

[0383] The processor 2101 described above can be used to execute the actions implemented internally by the terminal device as described in the preceding method embodiments, while the transceiver 2102 can be used to execute the actions described in the preceding method embodiments of sending data to or receiving data from the network device by the terminal device. Please refer to the descriptions in the preceding method embodiments for details, which will not be repeated here.

[0384] The processor 2101 can be any of the processors mentioned above. The terminal device may also include a communication bus, which can be a PCI bus (Peripheral Component Interconnect Standard) or an EISA bus (Extended Industry Standard Architecture). The bus can be divided into an address bus, a data bus, and a control bus. The communication bus is used to enable communication between these components. In this embodiment, the transceiver 2102 is used for signaling or data communication with other devices. The memory 2103 can be any of the memory types mentioned above. Optionally, the memory 2103 can also be at least one storage device located remotely from the processor 2101. The memory 2103 stores a set of computer program code or configuration information, and the processor 2101 executes the program in the memory 2103. The processor can cooperate with the memory and the transceiver to execute any of the methods and functions of the terminal device in the above embodiments.

[0385] This application also provides a chip system including a processor for supporting terminal devices or network devices to implement the functions involved in any of the above embodiments, such as generating or processing reference signals involved in the above methods.

[0386] In one possible design, the chip system may further include a memory for storing necessary computer programs and data for the terminal device or network device. The chip system may be composed of chips or may include chips and other discrete components. The inputs and outputs of the chip system correspond to the receiving and transmitting operations of the terminal device or network device in the method embodiment, respectively.

[0387] According to the method provided in the embodiments of this application, this application also provides a computer program product, which includes: a computer program that, when run on a computer, causes the computer to perform the method of any one of the embodiments shown in FIG11.

[0388] This application also provides a processing apparatus, including a processor and an interface. The processor can be used to execute the methods described in the above method embodiments.

[0389] It should be understood that the aforementioned processing device can be a chip. For example, the processing device can be a field-programmable gate array (FPGA), an application-specific integrated circuit (ASIC), a system-on-chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a programmable logic device (PLD), or other integrated chips.

[0390] In implementation, each step of the above method can be completed by integrated logic circuits in the processor's hardware or by instructions in software. The steps of the method disclosed in the embodiments of this application can be directly implemented by a hardware processor, or by a combination of hardware and software modules in the processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method. To avoid repetition, detailed descriptions are omitted here.

[0391] It should be noted that the processor in the embodiments of this application can be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiments can be completed by the integrated logic circuitry in the processor's hardware or by instructions in software form. The processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied as being executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory, and the processor reads the information in the memory and, in conjunction with its hardware, completes the steps of the above methods.

[0392] It is understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0393] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., high-density digital video discs (DVDs)), or semiconductor media (e.g., solid-state disks (SSDs)).

[0394] In the above-described device embodiments, the network devices and terminal devices in the method embodiments correspond to each other, and the corresponding modules or units execute the corresponding steps. For example, the communication unit (transceiver) executes the receiving or sending steps in the method embodiments, while other steps besides sending and receiving can be executed by the processing unit (processor). The functions of specific units can be found in the corresponding method embodiments. There can be one or more processors.

[0395] The terms “component,” “module,” “system,” etc., used in this specification are used to refer to computer-related entities, hardware, firmware, combinations of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, and / or a computer. As illustrated, applications running on computing devices and computing devices can both be components. One or more components may reside in a process and / or an execution thread, and components may be located on a single computer and / or distributed among two or more computers. Furthermore, these components can be executed from various computer-readable media on which various data structures are stored. Components can communicate, for example, via local and / or remote processes based on signals having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system, and / or a network, such as the Internet interacting with other systems via signals).

[0396] Those skilled in the art will recognize that the various illustrative logical blocks and steps 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 implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this application.

[0397] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0398] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0399] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0400] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0401] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0402] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

A communication method characterized by comprising: The method comprises: acquiring a reference signal, frequency domain resources of the reference signal comprising a first resource, a second resource and a third resource, the first resource being used to carry a demodulation reference signal (DMRS) sequence, the second resource being used to carry first single carrier data, and the third resource being vacant, the first resource, the second resource and the third resource not overlapping with each other; wherein the second resource is uniformly distributed on the frequency domain resources of the reference signal; transmitting the reference signal. The method of claim 1, wherein The energy per resource element (EPRE) of the DMRS sequence is determined based on the first resource and the third resource. The method according to claim 2, characterized in that When the size of the third resource is a0, the EPRE of the corresponding DMRS sequence is y0; when the size of the third resource is a1, the EPRE of the corresponding DMRS sequence is y1, and when the a0 is greater than the a1, the y0 is greater than the y1. The method according to any one of claims 1 to 3, characterized in that The modulation order of the first single carrier data is less than that of second single carrier data, and the EPRE of the first single carrier data is less than that of the second single carrier data, the EPRE of the DMRS sequence being determined based on the EPRE of the first single carrier data and the second resource, the second single carrier data being carried by a data signal, and the data signal not overlapping in time domain with the reference signal. The method according to claim 4, characterized in that When the EPRE of the first single carrier data is b0, the EPRE of the corresponding DMRS sequence is z0; when the EPRE of the first single carrier data is b1, the EPRE of the corresponding DMRS sequence is z1, and when the b0 is greater than the b1, the z0 is less than the z1. The method according to claim 4 or 5, characterized in that The method further comprises: receiving or transmitting first indication information, the first indication information being used to indicate a ratio of the EPRE of the first single carrier data to the EPRE of the DMRS sequence, and / or a ratio of the EPRE of the second single carrier data to the EPRE of the DMRS sequence; wherein the ratio of the EPRE of the first single carrier data to the EPRE of the DMRS sequence, and / or the ratio of the EPRE of the second single carrier data to the EPRE of the DMRS sequence is used to demodulate the first single carrier data and the second single carrier data. The method according to any one of claims 1 to 6, characterized in that The size of the second resource is related to at least one of the density of the DMRS sequence, a modulation and coding scheme (MCS) of the first single carrier data and the second single carrier data, the DMRS sequence, channel quality, and a distribution interval of the second resource, the second single carrier data being carried by a data signal, and the data signal not overlapping in time domain with the reference signal. The method of claim 7, wherein The size of the second resource being related to the DMRS sequence comprises: The size of the second resource is related to at least one of a Zadoff Chu (ZC) root and a length of the DMRS sequence, the DMRS sequence being generated based on a ZC sequence. The method of claim 8, wherein When the ZC root is q0, a peak-to-average power ratio (PAPR) corresponding to the DMRS sequence corresponding to the ZC root is x0, and a size of the second resource corresponding to the ZC root is N0 or is located in an interval range I0; when the ZC root is q1, a PAPR corresponding to the DMRS sequence corresponding to the ZC root is x1, and a size of the second resource corresponding to the ZC root is N1 or is located in an interval range I1; when the x0 is close to the x1 or an absolute value of a difference between the x0 and the x1 is less than a first threshold, the N0 is equal to the N1 or the I0 is equal to the I1. The method according to any one of claims 1 to 9, characterized in that The first resource includes a first set of subcarriers, and the second resource includes a second set of subcarriers, at least one subcarrier in the second set of subcarriers being adjacent to a subcarrier in the first set of subcarriers. The method according to any one of claims 1 to 10, characterized in that The method further includes: performing FDSS processing and / or SE processing on the reference signal and the data signal, the data signal not overlapping in time domain resources with the reference signal. The method of claim 11, wherein The reference signal and the data signal use the same FDSS. The method according to claim 11 or 12, characterized in that The SE processing corresponding to the reference signal has a spectrum spreading factor greater than a spectrum spreading factor corresponding to SE processing of the data signal. A communication method characterized by comprising: The method includes: receiving a reference signal, a frequency domain resource of the reference signal including a first resource, a second resource, and a third resource, the first resource being used to carry a demodulation reference signal (DMRS) sequence, the second resource being used to carry first single-carrier data, and the third resource being empty, the first resource, the second resource, and the third resource not overlapping with each other; wherein the second resource is uniformly distributed on the frequency domain resource of the reference signal. The method of claim 14, wherein An energy per resource element (EPRE) of the DMRS sequence is determined based on the first resource and the third resource. The method of claim 15, wherein When a size of the third resource is a0, an EPRE of the DMRS sequence corresponding to the third resource is y0; when a size of the third resource is a1, an EPRE of the DMRS sequence corresponding to the third resource is y1; when the a0 is greater than the a1, the y0 is greater than the y1. The method according to any one of claims 14-16, characterized in that A modulation order of the first single-carrier data is less than a modulation order of second single-carrier data and an EPRE of the first single-carrier data is less than an EPRE of the second single-carrier data, the EPRE of the DMRS sequence being determined based on the EPRE of the first single-carrier data and the second resource, the second single-carrier data being carried by a data signal, the data signal not overlapping in time domain resources with the reference signal. The method of claim 17, wherein When the EPRE of the first single-carrier data is b0, the EPRE of the DMRS sequence corresponding to the first single-carrier data is z0; when the EPRE of the first single-carrier data is b1, the EPRE of the DMRS sequence corresponding to the first single-carrier data is z1; when the b0 is greater than the b1, the z0 is less than the z1. The method of claim 18, wherein The method further includes: sending or receiving first indication information, the first indication information being used to indicate a ratio of the EPRE of the first single-carrier data to the EPRE of the DMRS sequence and / or a ratio of the EPRE of the second single-carrier data to the EPRE of the DMRS sequence; The ratio of the EPRE of the first single-carrier data to the EPRE of the DMRS sequence and / or the ratio of the EPRE of the second single-carrier data to the EPRE of the DMRS sequence is used for demodulating the first single-carrier data and the second single-carrier data. The method according to any one of claims 14-19, characterized in that The size of the second resource is related to at least one of the density of the DMRS sequence, a modulation and coding scheme (MCS) of the first single-carrier data and the second single-carrier data, the DMRS sequence, channel quality, and a distribution interval of the second resource, and the second single-carrier data is carried by a data signal that does not overlap in time domain resources with the reference signal. The method of claim 20, wherein The size of the second resource is related to the DMRS sequence includes: The size of the second resource is related to at least one of a Zadoff Chu (ZC) root and a length of the DMRS sequence, and the DMRS sequence is generated based on a ZC sequence. The method of claim 21, wherein When the ZC root is q0, a corresponding peak-to-average power ratio (PAPR) of the DMRS sequence is x0, and a size of the corresponding second resource is N0 or in an interval range I0; when the ZC root is q1, a corresponding PAPR of the DMRS sequence is x1, and a size of the corresponding second resource is N1 or in an interval range I1; when the x0 and the x1 are close or an absolute value of a difference between the x0 and the x1 is less than a first threshold, the N0 is equal to the N1 or the I0 is equal to the I1. The method according to any one of claims 14-22, characterized in that The first resource includes a first set of subcarriers, and the second resource includes a second set of subcarriers, and at least one subcarrier in the second set of subcarriers is adjacent to a subcarrier in the first set of subcarriers. The method according to any one of claims 14-23, characterized in that The reference signal and the data signal are subjected to frequency domain spectral shaping (FDSS) processing and / or spectral extension (SE) processing, and the data signal does not overlap in time domain resources with the reference signal. The method of claim 24, wherein The reference signal and the data signal use the same FDSS. The method according to claim 24 or 25, characterized in that A spectral extension factor corresponding to the SE processing of the reference signal is greater than a spectral extension factor corresponding to the SE processing of the data signal. A communication device characterized by comprising: The communication device includes a memory and a processor, the memory is used to store a computer program, and the processor runs the computer program to enable the communication device to perform the method in any one of claims 1-13 or any one of claims 14-26. A computer-readable storage medium, characterized by The computer readable storage medium includes a computer program, when the computer program is run by a processor, a method as claimed in any one of claims 1-13 or any one of claims 14-26 is implemented. A chip characterized by The chip includes a processor and a communication interface, the communication interface is used to communicate with external devices or internal devices, and the processor is used to implement the method in any one of claims 1-13 or any one of claims 14-26. A communication system characterized by The system comprises a terminal device for performing the method according to any one of claims 1-13 and a network device for performing the method according to any one of claims 14-26; or the network device is for performing the method according to any one of claims 1-13 and the terminal device is for performing the method according to any one of claims 14-26.

Images