Communication method and apparatus

Abstract

Provided in the present application is a communication method, which is executed by a sending end. The method comprises: on the basis of a first modulation solution, modulating a first bit stream to obtain a first data signal; on the basis of a second modulation solution, modulating a second bit stream to obtain a second data signal; and sending a reference signal and the second data signal, the reference signal comprising the first data signal and a DMRS sequence, the first data signal and the DMRS sequence being located in different frequency domain resources, the reference signal and the second data signal being located in different time domain resources, and the order of the first modulation solution being lower than the order of the second modulation solution. In a frequency division multiplexing mode of the DMRS sequence and data, the technical solution can ensure that the PAPR of the reference signal is not lower than the PAPR of the second data signal.

Description

Communication method and apparatus

[0001] This application claims priority to the Chinese Patent Application No. 202410637548.0, filed on May 21, 2024, and entitled "Communication method and apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication, and more particularly, to a communication method and apparatus. BACKGROUND

[0003] Physical downlink shared channel (PDSCH) and physical uplink shared channel (PUSCH) are used for transmitting downlink data and uplink data respectively. In long term evolution (LTE) and new radio (NR), demodulation reference signal (DMRS) is used for channel estimation when demodulating data symbols in PDSCH or PUSCH.

[0004] In LTE and NR, DMRS design can be divided into two types according to the frequency domain resources occupied by DMRS: Type 1 and Type 2. Whether it is Type 1 or Type 2, it only occupies part of the subcarriers within one resource block (RB). At the same time, the occupied subcarriers are power boosted, and the unoccupied subcarriers are empty. For example, for Type 1, only 6 subcarriers within 1 RB are used to place DMRS, and the 6 subcarriers are empty. In addition, each of the 6 occupied subcarriers is power boosted by 3dB. The prior art proposes that the unoccupied subcarriers are no longer empty, but transmit single-carrier data (i.e., the discrete fourier transform (DFT) result of the quadrature amplitude modulation (QAM) symbol sequence is placed in the frequency domain). That is, at this time, the DMRS sequence also carries data, and the DMRS sequence and the data adopt frequency division multiplexing. The advantage of this is that it will improve the spectral efficiency and reduce the demodulation delay. For example, previously in NR, DMRS symbols and data symbols were time division multiplexed, and two symbols (one DMRS symbol and one data symbol) needed to be received before data demodulation could begin. Now, only the DMRS symbol needs to be received before data demodulation can begin.

[0005] Taking a single-symbol type 1 DMRS design as an example, FIG. 1 is a schematic diagram of frequency division multiplexing of a DMRS sequence and data in a DMRS symbol. As shown in FIG. 1, even-indexed subcarriers in a RB are used to carry a DMRS sequence, for example, subcarriers 0, 2, 4, 6, 8, and 10 are used to carry a DMRS sequence. Odd-indexed subcarriers are used to transmit data, for example, subcarriers 1, 3, 5, 7, 9, and 11 are used to transmit data. However, in the frequency division multiplexing manner of DMRS sequences and data, the peak-to-average power ratio (PAPR) of the DMRS symbol can be deteriorated, so that the PAPR of the DMRS symbol is higher than the PAPR of the data symbol. SUMMARY

[0006] The present application provides a communication method, which can ensure that the PAPR of a DMRS symbol is not higher than the PAPR of a data symbol in the frequency division multiplexing manner of DMRS sequences and data.

[0007] In a first aspect, a communication method is provided. The method is performed by a transmitting end. In the absence of special instructions, the "transmitting end" in the present application can refer to the transmitting end itself, a component (for example, a processor, a chip, or a chip system) in the transmitting end, or a logic module or software capable of realizing all or part of the functions of the transmitting end.

[0008] The method includes: modulating a first bit stream based on a first modulation scheme to obtain a first data signal; modulating a second bit stream based on a second modulation scheme to obtain a second data signal; and transmitting a reference signal and the second data signal, the reference signal including the first data signal and a DMRS sequence, the first data signal and the DMRS sequence being located in different frequency domain resources, the reference signal and the second data signal being located in different time domain resources; wherein an order of the first modulation scheme is lower than an order of the second modulation scheme.

[0009] It should be understood that in the embodiments of the present application, the reference signal can also be referred to as a DMRS symbol, wherein the DMRS symbol carries a DMRS sequence and a first data signal, and the DMRS sequence and the first data signal are located in the DMRS symbol in a frequency division multiplexing manner. The data symbol refers to a symbol carrying data, that is, in the present application, the data symbol refers to a symbol carrying a second data signal, which will not be described again hereinafter.

[0010] It should also be understood that the DMRS symbol in the embodiments of the present application is different from the DMRS symbol in the existing NR, specifically, in the existing NR, the DMRS symbol only carries a DMRS sequence, while the DMRS symbol in the embodiments of the present application carries a DMRS sequence and a first data signal, in other words, the DMRS symbol in the embodiments of the present application can be considered as a time domain symbol in which a DMRS sequence and a first data signal are multiplexed.

[0011] In the technical solutions of the present application, by constraining the order of the first modulation scheme to be lower than the order of the second modulation scheme, it can be ensured that the PAPR of the DMRS symbol is not higher than the PAPR of the data symbol in the frequency division multiplexing manner of the DMRS sequence and the first data signal.

[0012] In combination with the first aspect, in some implementations of the first aspect, the DMRS sequence is generated based on a Zadoff-Chu (ZC) sequence, and a root of the ZC sequence is one of a first root set. Based on the above technical solution, the sending end generates a DMRS sequence based on a root in the first root set, so as to ensure that the PAPR of the DMRS symbol is not higher than the PAPR of the data symbol in the frequency division multiplexing manner of the DMRS sequence and the first data signal.

[0013] In combination with the first aspect, in some implementations of the first aspect, the first root set is related to the length of the ZC sequence.

[0014] It should be understood that the length of the ZC sequence is related to the length of the DMRS sequence, and the length of the DMRS sequence is related to the transmission bandwidth, therefore, the root values included in the first root set will also change with the change of the transmission bandwidth. Based on the above technical solution, it can be ensured that the PAPR of the DMRS symbol is not higher than the PAPR of the data symbol under different transmission bandwidths.

[0015] It should also be understood that the aforementioned "related" can be replaced by "related" or "associated", and the following will not be repeated.

[0016] In combination with the first aspect, in some implementations of the first aspect, the DMRS sequence is generated based on a Pi / 2-binary phase shift keying (BPSK) Pi / 2-BPSK symbol sequence. Based on the above technical solution, the DMRS sequence generated by the sending end based on the Pi / 2-BPSK symbol sequence can ensure that the PAPR of the DMRS symbol is not higher than the PAPR of the data symbol in the frequency division multiplexing manner of the DMRS sequence and the first data signal.

[0017] In some implementations of the first aspect, the DMRS sequence is generated based on a Pi / 2-BPSK symbol sequence, and the DMRS sequence is generated based on the Pi / 2-BPSK symbol sequence when the order of the second modulation scheme is greater than or equal to a first threshold. Based on the above technical solution, the PAPR of the DMRS symbol can be ensured to be not higher than the PAPR of the data symbol in the frequency division multiplexing manner between the DMRS sequence and the first data signal.

[0018] In some implementations of the first aspect, the reference signal further includes a first signal occupying a first reserved subcarrier, and the second data signal further includes a second signal occupying a second reserved subcarrier, and the number of the first reserved subcarriers is greater than the number of the second reserved subcarriers.

[0019] Optionally, in a possible implementation, the number of the second reserved subcarriers is 0, and the number of the first reserved subcarriers is a positive integer greater than 0. That is, the second data signal does not carry the second signal.

[0020] It should be understood that the first signal and the second signal can also be referred to as reserved signals, and the present application does not limit this.

[0021] In the embodiments of the present application, the first reserved subcarriers carry the first signal, which functions to reduce the PAPR of the reference signal, and the second subcarriers carry the second signal, which functions to reduce the PAPR of the second data signal. Since the number of the first reserved subcarriers is greater than the number of the second reserved subcarriers, that is, the reference signal has more reserved subcarriers than the second data signal, the PAPR of the reference signal is reduced more greatly. Therefore, based on the above technical solution, the PAPR of the DMRS symbol can be ensured to be not higher than the PAPR of the data symbol in the frequency division multiplexing manner between the DMRS sequence and the first data signal.

[0022] In some implementations of the first aspect, the reference signal and the second data signal occupy different bandwidths.

[0023] In some implementations of the first aspect, a first bandwidth expansion coefficient is greater than or equal to a second bandwidth expansion coefficient, where the first bandwidth expansion coefficient is a ratio of a bandwidth occupied by a first signal included in the reference signal to a bandwidth occupied by the reference signal, and the second bandwidth expansion coefficient is a ratio of a bandwidth occupied by a second signal included in the second data signal to a bandwidth occupied by the second data signal. Based on the above technical solution, the PAPR of the DMRS symbol can be ensured to be not higher than the PAPR of the data symbol in the frequency division multiplexing manner between the DMRS sequence and the first data signal.

[0024] In some implementations of the first aspect, the first reserved subcarrier and the DMRS sequence are located at different subcarriers, and the first reserved subcarrier is located at one side or both sides of the frequency domain resource occupied by the reference signal; and / or the first reserved subcarrier is evenly placed on the frequency domain resource occupied by the reference signal. Based on the above technical solution, the signaling overhead for notifying the position of the frequency domain resource occupied by the first reserved subcarrier can be reduced, or the signaling design for notifying the position of the frequency domain resource occupied by the first reserved subcarrier can be simplified.

[0025] In some implementations of the first aspect, the second reserved subcarrier is located at one side or both sides of the frequency domain resource occupied by the second data signal; and / or the second reserved subcarrier is evenly placed on the frequency domain resource occupied by the second data signal. Based on the above technical solution, the signaling overhead for notifying the position of the frequency domain resource occupied by the second reserved subcarrier can be reduced, or the signaling design for notifying the position of the frequency domain resource occupied by the second reserved subcarrier can be simplified.

[0026] In some implementations of the first aspect, before transmitting the reference signal and the second data signal, the method further includes: performing frequency domain spectrum shaping (FDSS) processing on the reference signal and the second data signal. Based on the above technical solution, the PAPR of the reference signal and the second data signal can be reduced.

[0027] In some implementations of the first aspect, the FDSS processing on the reference signal and the second data signal includes: the window function used for the FDSS processing on the reference signal is different from the window function used for the FDSS processing on the second data signal. In the technical solution of the present application, it is assumed that the window function used for the FDSS processing on the reference signal is window function 1, the window function used for the FDSS processing on the second data signal is window function 2, and the window function 1 and the window function 2 are selected so that in the frequency division multiplexing manner of the DMRS sequence and the first data signal, the PAPR of the DMRS symbol is not higher than the PAPR of the data symbol.

[0028] In some implementations of the first aspect, the FDSS processing of the reference signal and the second data signal includes: a roll-off coefficient of a window function used for the FDSS processing of the reference signal is greater than a roll-off coefficient of a window function used for the FDSS processing of the second data signal. According to the above technical solution, by constraining the roll-off coefficient of the window function used for the FDSS processing of the reference signal to be greater than the roll-off coefficient of the window function used for the FDSS processing of the second data signal, it can be ensured that the PAPR of the DMRS symbol is not higher than the PAPR of the data symbol in the case where the DMRS sequence and the first data signal use frequency division multiplexing.

[0029] In some implementations of the first aspect, an energy per resource element (EPRE) of the first data signal is lower than an EPRE of the DMRS sequence.

[0030] In some implementations of the first aspect, an energy per resource element (EPRE) of the first data signal is lower than an EPRE of the DMRS sequence.

[0031] It should be understood that the EPRE of the first data signal being lower than the EPRE of the DMRS sequence can also be described as the ratio between the EPRE of the first data signal and the EPRE of the DMRS sequence being less than 1.

[0032] According to the above technical solution, in the case where the order of the modulation scheme of the first data signal is lower than the order of the modulation scheme of the second data signal, further constraining the EPRE of the first data signal to be lower than the EPRE of the DMRS sequence can ensure that the PAPR of the DMRS symbol (the time domain symbol in which the DMRS sequence and the first data signal are multiplexed) is not higher than the PAPR of the data symbol (the time domain symbol of the second data signal).

[0033] In some implementations of the first aspect, the reference signal includes the first data signal and a DMRS, including: in the case where the order of the second modulation scheme is greater than or equal to a second threshold, the reference signal includes the first data signal and a DMRS.

[0034] It should be understood that the present application does not limit the value of the second threshold. For example, the second threshold can be 1, or the second threshold can be 2.

[0035] With reference to the first aspect, in some implementations of the first aspect, the reference signal comprises a first data signal and a DMRS, and the method further comprises: receiving indication information, the indication information being used to indicate that the reference signal comprises the first data signal.

[0036] With reference to the first aspect, in some implementations of the first aspect, the first bit stream and the second bit stream belong to a same code word; or the first bit stream and the second bit stream belong to different code words.

[0037] The second aspect provides a communication method, which is performed by a receiving end. In the absence of special description, the "receiving end" in the present application can refer to the receiving end itself (for example, a session management function (SMF) network element, an access and mobility management function (AMF) network element, etc.), a component (for example, a processor, a chip, or a chip system, etc.) in the receiving end, or a logic module or software capable of realizing all or part of the functions of the receiving end. It should be understood that the name of the network element is not limited in the present application. For example, the access and mobility management function network element can also be referred to as a mobility management function network element.

[0038] The method comprises: receiving a reference signal and a second data signal, the reference signal comprising a first data signal and a DMRS sequence, the first data signal and the DMRS sequence being located in different frequency domain resources, the reference signal and the second data signal being located in different time domain resources; wherein the first data signal is obtained by modulating a first bit stream based on a first modulation scheme, and the second data signal is obtained by modulating a second bit stream based on a second modulation scheme, the order of the first modulation scheme being lower than the order of the second modulation scheme.

[0039] The beneficial effects of the second aspect and its implementations can refer to the beneficial effects of the first aspect and its implementations, which will not be repeated here.

[0040] With reference to the second aspect, in some implementations of the second aspect, the DMRS sequence is generated based on a ZC sequence, and a root of the ZC sequence is one of a first root set.

[0041] With reference to the second aspect, in some implementations of the second aspect, the first root set is related to the length of the ZC sequence.

[0042] With reference to the second aspect, in some implementations of the second aspect, the DMRS sequence is generated based on a Pi / 2-BPSK symbol sequence.

[0043] With reference to the second aspect, in some implementations of the second aspect, the DMRS sequence is generated based on a Pi / 2-BPSK symbol sequence, including: in a case where the order of the second modulation scheme is greater than or equal to a first threshold, the DMRS sequence is generated based on a Pi / 2-BPSK symbol sequence.

[0044] With reference to the second aspect, in some implementations of the second aspect, the reference signal includes a first signal, the first signal occupying the first reserved subcarriers.

[0045] With reference to the second aspect, in some implementations of the second aspect, the reference signal further includes a first signal, the first signal occupying the first reserved subcarriers, the second data signal further includes a second signal, the second signal occupying the second reserved subcarriers, a number of the first reserved subcarriers being greater than a number of the second reserved subcarriers.

[0046] Optionally, in a possible implementation, the number of the second reserved subcarriers is 0, and the number of the first reserved subcarriers is a positive integer greater than 0. That is, the second data signal does not carry the second signal.

[0047] It should be understood that the first signal and the second signal can also be referred to as reserved signals, and the present application does not limit this.

[0048] With reference to the second aspect, in some implementations of the second aspect, the first reserved subcarriers and the DMRS sequence are located in different subcarriers, wherein the first reserved subcarriers are located at one side or both sides of the frequency domain resource occupied by the reference signal; and / or the first reserved subcarriers are uniformly placed on the frequency domain resource occupied by the reference signal.

[0049] With reference to the second aspect, in some implementations of the second aspect, the second reserved subcarriers are located at one side or both sides of the frequency domain resource occupied by the second data signal; and / or the second reserved subcarriers are uniformly placed on the frequency domain resource occupied by the second data signal.

[0050] With reference to the second aspect, in some implementations of the second aspect, the reference signal and the second data signal have undergone FDSS processing.

[0051] With reference to the second aspect, in some implementations of the second aspect, the reference signal and the second data signal are subjected to FDSS processing, including that a window function used for FDSS processing of the reference signal is different from a window function used for FDSS processing of the second data signal. In the technical solution of the present application, it is assumed that a window function used for FDSS processing of the reference signal is window function 1, and a window function used for FDSS processing of the second data signal is window function 2, and the window function 1 and the window function 2 are selected such that, in the frequency division multiplexing manner of the DMRS sequence and the first data signal, the PAPR of the DMRS symbol is not higher than the PAPR of the data symbol.

[0052] With reference to the second aspect, in some implementations of the second aspect, the reference signal and the second data signal are subjected to FDSS processing, including that a roll-off coefficient of a window function used for FDSS processing of the reference signal is greater than a roll-off coefficient of a window function used for FDSS processing of the second data signal.

[0053] With reference to the second aspect, in some implementations of the second aspect, the EPRE of the first data signal is lower than the EPRE of the DMRS sequence.

[0054] With reference to the second aspect, in some implementations of the second aspect, the reference signal includes the first data signal and the DMRS sequence, including that, in a case where the order of the second modulation scheme is greater than or equal to a second threshold, the reference signal includes the first data signal and the DMRS sequence.

[0055] It should be understood that the present application does not limit the value of the second threshold. For example, the second threshold can be 1, or the second threshold can be 2.

[0056] With reference to the second aspect, in some implementations of the second aspect, the method further includes: sending indication information, the indication information being used to indicate that the reference signal includes the first data signal.

[0057] With reference to the second aspect, in some implementations of the second aspect, the first bit stream and the second bit stream belong to the same code word; or the first bit stream and the second bit stream belong to different code words.

[0058] With reference to the second aspect, in some implementations of the second aspect, the reference signal and the second data signal occupy different bandwidths.

[0059] With reference to the second aspect, in some implementations of the second aspect, the first bandwidth spreading factor is greater than or equal to the second bandwidth spreading factor, where the first bandwidth spreading factor is a ratio of a bandwidth occupied by a first signal included in the reference signal to a bandwidth occupied by the reference signal, and the second bandwidth spreading factor is a ratio of a bandwidth occupied by a second signal included in the second data signal to a bandwidth occupied by the second data signal.

[0060] In a third aspect, a communication method is provided. The method is performed by a transmitting end. In the absence of specific statements, the transmitting end in the present application can refer to the transmitting end itself, a component (for example, a processor, a chip, or a chip system) in the transmitting end, or a logic module or software capable of realizing all or part of the functions of the transmitting end.

[0061] The method includes: generating a reference signal, the reference signal including a first data signal and a DMRS sequence, the first data signal and the DMRS sequence being located in different frequency domain resources; and transmitting the reference signal and a second data signal, the reference signal and the second data signal being located in different time domain resources; where the DMRS sequence is generated based on a ZC sequence, and a root of the ZC sequence is one of a first root set, or, in a case where an order of a modulation scheme corresponding to the second data signal is greater than or equal to a first threshold, the DMRS sequence is generated based on a Pi / 2-BPSK symbol sequence.

[0062] In the technical solution of the present application, the transmitting end generates a DMRS sequence based on a root in a first root set, or the transmitting end generates a DMRS sequence based on a Pi / 2-BPSK symbol sequence, which can make the PAPR of the DMRS sequence lower, thereby ensuring that the PAPR of the DMRS symbol is not higher than the PAPR of the data symbol in a frequency division multiplexing manner between the DMRS sequence and the first data signal.

[0063] With reference to the third aspect, in some implementations of the third aspect, the first root set is related to a length of the ZC sequence.

[0064] It should be understood that the length of the ZC sequence is related to the length of the DMRS sequence, and the length of the DMRS sequence is related to the transmission bandwidth, and therefore, the root values included in the first root set will also change with the change of the transmission bandwidth. Based on the above technical solution, it can be ensured that the PAPR of the DMRS symbol is not higher than the PAPR of the data symbol under different transmission bandwidths.

[0065] It should also be understood that the aforementioned “related” can be replaced by “related” or “associated”, and the following will not be repeated.

[0066] In some implementations of the third aspect, the reference signal further includes a first signal occupying a first reserved subcarrier, and the second data signal further includes a second signal occupying a second reserved subcarrier, wherein a number of the first reserved subcarriers is greater than a number of the second reserved subcarriers.

[0067] Optionally, in a possible implementation, the number of the second reserved subcarriers is 0, and the number of the first reserved subcarriers is a positive integer greater than 0. That is, the second data signal does not carry the second signal.

[0068] It should be understood that the first signal and the second signal can also be referred to as reserved signals, and the present application does not limit this.

[0069] In the embodiments of the present application, the first reserved subcarriers carry the first signal, which serves to reduce the PAPR of the reference signal, and the second subcarriers carry the second signal, which serves to reduce the PAPR of the second data signal. Since the number of the first reserved subcarriers is greater than the number of the second reserved subcarriers, that is, the reference signal has more reserved subcarriers than the second data signal, the PAPR of the reference signal is reduced more greatly. Therefore, based on the above technical solution, it can be ensured that the PAPR of the DMRS symbol is not higher than the PAPR of the data symbol in the frequency division multiplexing manner of the DMRS sequence and the first data signal.

[0070] In some implementations of the third aspect, the first reserved subcarriers and the DMRS are located in different subcarriers, wherein the first reserved subcarriers are located at one side or both sides of the frequency domain resource occupied by the reference signal; and / or the first reserved subcarriers are evenly placed on the frequency domain resource occupied by the reference signal. Based on the above technical solution, the signaling overhead for notifying the frequency domain resource position occupied by the first reserved subcarriers can be reduced or the signaling design for notifying the frequency domain resource position occupied by the first reserved subcarriers can be simplified.

[0071] In some implementations of the third aspect, the second reserved subcarriers are located at one side or both sides of the frequency domain resource occupied by the second data signal; and / or the second reserved subcarriers are evenly placed on the frequency domain resource occupied by the second data signal. Based on the above technical solution, the signaling overhead for notifying the frequency domain resource position occupied by the second reserved subcarriers can be reduced or the signaling design for notifying the frequency domain resource position occupied by the second reserved subcarriers can be simplified.

[0072] In some implementations of the third aspect, before the reference signal and the second data signal are transmitted, the method further includes: performing FDSS processing on the reference signal and the second data signal. Based on the above technical solution, the PAPR of the reference signal and the second data signal can be reduced.

[0073] In some implementations of the third aspect, the FDSS processing of the reference signal and the second data signal includes that a window function used for the FDSS processing of the reference signal is different from a window function used for the FDSS processing of the second data signal. In the technical solution of the present application, it is assumed that the window function used for the FDSS processing of the reference signal is window function 1, the window function used for the FDSS processing of the second data signal is window function 2, and the window function 1 and the window function 2 are selected so that the PAPR of the DMRS symbol is not higher than the PAPR of the data symbol in the frequency division multiplexing manner of the DMRS sequence and the first data signal.

[0074] In some implementations of the third aspect, the FDSS processing of the reference signal and the second data signal includes that a roll-off coefficient of the window function used for the FDSS processing of the reference signal is greater than a roll-off coefficient of the window function used for the FDSS processing of the second data signal. Based on the above technical solution, by constraining the roll-off coefficient of the window function used for the FDSS processing of the reference signal to be greater than the roll-off coefficient of the window function used for the FDSS processing of the second data signal, the PAPR of the DMRS symbol can be ensured to be not higher than the PAPR of the data symbol in the frequency division multiplexing manner of the DMRS sequence and the first data signal.

[0075] In some implementations of the third aspect, the first data signal is obtained by modulating a first bit stream based on a first modulation scheme, and the second data signal is obtained by modulating a second bit stream based on a second modulation scheme, and an order of the first modulation scheme is lower than an order of the second modulation scheme. Based on the above technical solution, by constraining the order of the first modulation scheme to be lower than the order of the second modulation scheme, the PAPR of the DMRS symbol can be ensured to be not higher than the PAPR of the data symbol in the frequency division multiplexing manner of the DMRS sequence and the first data signal.

[0076] In some implementations of the third aspect, the EPRE of the first data signal is lower than the EPRE of the DMRS sequence. According to the above technical solution, in the case that the order of the modulation scheme (the first modulation scheme) of the first data signal is lower than the order of the modulation scheme (the second modulation scheme) of the second data signal, the EPRE of the first data signal is lower than the EPRE of the DMRS sequence, which can ensure that the PAPR of the DMRS symbol (the time domain symbol multiplexed by the DMRS sequence and the first data signal) is not higher than the PAPR of the data symbol (the time domain symbol of the second data signal).

[0077] With reference to the third aspect, in some implementations of the third aspect, the reference signal comprises the first data signal and a DMRS, and the method further comprises: in a case where the order of the second modulation scheme is greater than or equal to a second threshold, the reference signal comprises the first data signal and a DMRS sequence.

[0078] It should be understood that the present application does not limit the value of the second threshold. For example, the second threshold can be 1, or the second threshold can be 2.

[0079] With reference to the third aspect, in some implementations of the third aspect, the reference signal comprises the first data signal and a DMRS sequence, and the method further comprises: receiving indication information, the indication information being used to indicate that the reference signal comprises the first data signal.

[0080] With reference to the third aspect, in some implementations of the third aspect, the first bit stream and the second bit stream belong to the same code word; or the first bit stream and the second bit stream belong to different code words.

[0081] With reference to the third aspect, in some implementations of the third aspect, the reference signal and the second data signal occupy different bandwidths.

[0082] With reference to the third aspect, in some implementations of the third aspect, a first bandwidth expansion coefficient is greater than or equal to a second bandwidth expansion coefficient, wherein the first bandwidth expansion coefficient is a ratio of a bandwidth occupied by a first signal comprised in the reference signal to a bandwidth occupied by the reference signal, and the second bandwidth expansion coefficient is a ratio of a bandwidth occupied by a second signal comprised in the second data signal to a bandwidth occupied by the second data signal. Based on the above technical solution, in a case where a DMRS sequence and a first data signal adopt a frequency division multiplexing manner, it can be ensured that the PAPR of the DMRS symbol is not higher than the PAPR of the data symbol.

[0083] A fourth aspect provides a communication method, which is performed by a receiving end. In the case where not specially stated, the "receiving end" in the present application can refer to the receiving end itself (such as an SMF network element, an AMF network element, etc.), a component (such as a processor, a chip, or a chip system, etc.) in the receiving end, or a logic module or software capable of realizing all or part of the functions of the receiving end.

[0084] The method comprises: receiving a reference signal and a second data signal, the reference signal comprising a first data signal and a DMRS sequence, the first data signal and the DMRS sequence being located in different frequency domain resources; the reference signal and the second data signal being located in different time domain resources; wherein the DMRS sequence is generated based on a ZC sequence, and a root of the ZC sequence is one in a first root set, or, in a case where an order of a modulation scheme corresponding to the second data signal is greater than or equal to a first threshold, the DMRS sequence is generated based on a Pi / 2-BPSK symbol sequence.

[0085] The beneficial effects of the fourth aspect and its implementation manners can refer to the beneficial effects of the third aspect and its implementation manners, which are not described herein.

[0086] In combination with the fourth aspect, in some implementation manners of the fourth aspect, the first root set is related to a length of the ZC sequence.

[0087] In combination with the fourth aspect, in some implementation manners of the fourth aspect, the reference signal comprises a first signal, the first signal occupying first reserved subcarriers.

[0088] In combination with the fourth aspect, in some implementation manners of the fourth aspect, the reference signal further comprises a first signal, the first signal occupying first reserved subcarriers, the second data signal further comprises a second signal, the second signal occupying second reserved subcarriers, a number of the first reserved subcarriers is greater than a number of the second reserved subcarriers.

[0089] Optionally, in a possible implementation manner, the number of the second reserved subcarriers is 0, and the number of the first reserved subcarriers is a positive integer greater than 0. That is, the second data signal does not carry the second signal.

[0090] It should be understood that the first signal and the second signal can also be referred to as reserved signals, which are not limited in the present application.

[0091] In combination with the fourth aspect, in some implementation manners of the fourth aspect, the first reserved subcarriers and the DMRS are located in different subcarriers, wherein the first reserved subcarriers are located at one side or both sides of the frequency domain resources occupied by the reference signal; and / or the first reserved subcarriers are uniformly placed on the frequency domain resources occupied by the reference signal.

[0092] In combination with the fourth aspect, in some implementation manners of the fourth aspect, the second reserved subcarriers are located at one side or both sides of the frequency domain resources occupied by the second data signal; and / or the second reserved subcarriers are uniformly placed on the frequency domain resources occupied by the second data signal.

[0093] With reference to the fourth aspect, in some implementations of the fourth aspect, before the transmitting the reference signal and the second data signal, the method further includes: performing FDSS processing on the reference signal and the second data signal.

[0094] With reference to the fourth aspect, in some implementations of the fourth aspect, the performing FDSS processing on the reference signal and the second data signal includes: using different window functions for the performing FDSS processing on the reference signal and the second data signal.

[0095] With reference to the fourth aspect, in some implementations of the fourth aspect, the performing FDSS processing on the reference signal and the second data signal includes: using a window function with a larger roll-off factor for the performing FDSS processing on the reference signal than for the performing FDSS processing on the second data signal.

[0096] With reference to the fourth aspect, in some implementations of the fourth aspect, the first data signal is obtained by modulating a first bit stream based on a first modulation scheme, and the second data signal is obtained by modulating a second bit stream based on a second modulation scheme, where an order of the first modulation scheme is lower than an order of the second modulation scheme.

[0097] With reference to the fourth aspect, in some implementations of the fourth aspect, an EPRE of the first data signal is lower than an EPRE of the DMRS sequence.

[0098] With reference to the fourth aspect, in some implementations of the fourth aspect, the reference signal includes the first data signal and a DMRS sequence, including: in a case where the order of the second modulation scheme is greater than or equal to a second threshold, the reference signal includes the first data signal and the DMRS sequence.

[0099] With reference to the fourth aspect, in some implementations of the fourth aspect, the reference signal includes the first data signal and a DMRS sequence, further including: receiving indication information, the indication information being used to indicate that the reference signal includes the first data signal.

[0100] With reference to the fourth aspect, in some implementations of the fourth aspect, the first bit stream and the second bit stream belong to a same code word; or the first bit stream and the second bit stream belong to different code words.

[0101] With reference to the fourth aspect, in some implementations of the fourth aspect, the reference signal and the second data signal occupy different bandwidths.

[0102] With reference to the fourth aspect, in some implementations of the fourth aspect, the first bandwidth spreading factor is greater than or equal to the second bandwidth spreading factor, where the first bandwidth spreading factor is a ratio of a bandwidth occupied by a first signal included in the reference signal to a bandwidth occupied by the reference signal, and the second bandwidth spreading factor is a ratio of a bandwidth occupied by a second signal included in the second data signal to a bandwidth occupied by the second data signal.

[0103] In a fifth aspect, a communication method is provided. The method is performed by a transmitting end. In the absence of specific statements, the "transmitting end" in the present application can refer to the transmitting end itself, a component (for example, a processor, a chip, or a chip system) in the transmitting end, or a logic module or software capable of realizing all or part of the functions of the transmitting end.

[0104] The method includes: generating a reference signal, the reference signal including a first data signal and a DMRS sequence, the first data signal and the DMRS sequence being located in different frequency domain resources; transmitting the reference signal and a second data signal, the reference signal and the second data signal being located in different time domain resources; wherein the reference signal further includes a first signal, the first signal occupying a first reserved subcarrier, the second data signal further includes a second signal, the second signal occupying a second reserved subcarrier, the number of the first reserved subcarriers being greater than the number of the second reserved subcarriers, and / or the reference signal and the second data signal being subjected to FDSS processing.

[0105] Optionally, in a possible implementation, the number of the second reserved subcarriers is 0, and the number of the first reserved subcarriers is a positive integer greater than 0. That is, the second data signal does not carry the second signal.

[0106] It should be understood that the first signal and the second signal can also be referred to as a reserved signal, and the present application does not limit this.

[0107] In the technical solution of the present application, the first reserved subcarriers carry the first signal, which serves to reduce the PAPR of the reference signal, and the second subcarriers carry the second signal, which serves to reduce the PAPR of the second data signal. Since the number of the first reserved subcarriers is greater than the number of the second reserved subcarriers, that is, the reference signal has more reserved subcarriers than the second data signal, the PAPR of the reference signal is reduced more greatly. Moreover, the reference signal and the second data signal are subjected to FDSS processing, which can reduce the PAPR of the reference signal and the second data signal. Therefore, based on the above technical solution, the PAPR of the DMRS symbol can be ensured to be not higher than the PAPR of the data symbol in the frequency division multiplexing manner of the DMRS sequence and the first data signal.

[0108] In some implementations of the fifth aspect, the first reserved subcarrier and the DMRS sequence are located at different subcarriers, wherein the first reserved subcarrier is located at one side or both sides of the frequency domain resource occupied by the reference signal; and / or the first reserved subcarrier is evenly placed on the frequency domain resource occupied by the reference signal. Based on the above technical solution, the signaling overhead for notifying the position of the frequency domain resource occupied by the first reserved subcarrier can be reduced or the signaling design for notifying the position of the frequency domain resource occupied by the first reserved subcarrier can be simplified.

[0109] In some implementations of the fifth aspect, the second reserved subcarrier is located at one side or both sides of the frequency domain resource occupied by the second data signal; and / or the second reserved subcarrier is evenly placed on the frequency domain resource occupied by the second data signal. Based on the above technical solution, the signaling overhead for notifying the position of the frequency domain resource occupied by the second reserved subcarrier can be reduced or the signaling design for notifying the position of the frequency domain resource occupied by the second reserved subcarrier can be simplified.

[0110] In some implementations of the fifth aspect, the reference signal and the second data signal are subjected to FDSS processing, including that the window function used for FDSS processing of the reference signal is different from the window function used for FDSS processing of the second data signal. In the technical solution of the present application, it is assumed that the window function used for FDSS processing of the reference signal is window function 1, the window function used for FDSS processing of the second data signal is window function 2, and the window function 1 and the window function 2 are selected such that the PAPR of the DMRS symbol is not higher than the PAPR of the data symbol in the frequency division multiplexing manner of the DMRS sequence and the first data signal.

[0111] In some implementations of the fifth aspect, the reference signal and the second data signal subjected to FDSS processing, including that the roll-off coefficient of the window function used for FDSS processing of the reference signal is greater than the roll-off coefficient of the window function used for FDSS processing of the second data. Based on the above technical solution, by constraining the roll-off coefficient of the window function used for FDSS processing of the reference signal to be greater than the roll-off coefficient of the window function used for FDSS processing of the second data signal, the PAPR of the DMRS symbol can be ensured to be not higher than the PAPR of the data symbol in the frequency division multiplexing manner of the DMRS sequence and the first data signal.

[0112] In some implementations of the fifth aspect, the DMRS sequence is generated based on a ZC sequence, and a root of the ZC sequence is one of a first set of roots. Based on the above technical solution, the transmitting end generates the DMRS sequence based on the root in the first set of roots, thereby ensuring that the PAPR of the DMRS symbol is not higher than the PAPR of the data symbol in a manner in which the DMRS sequence and the first data signal use frequency division multiplexing.

[0113] In some implementations of the fifth aspect, the first set of roots is related to a length of the ZC sequence.

[0114] It should be understood that the length of the ZC sequence is related to the length of the DMRS sequence, and the length of the DMRS sequence is related to the transmission bandwidth, and therefore, the root values included in the first set of roots will also change with the change of the transmission bandwidth. Based on the above technical solution, it can be ensured that the PAPR of the DMRS symbol is not higher than the PAPR of the data symbol under different transmission bandwidths.

[0115] In some implementations of the fifth aspect, the DMRS sequence is generated based on a Pi / 2-BPSK symbol sequence. Based on the above technical solution, the DMRS sequence generated by the transmitting end based on the Pi / 2-BPSK symbol sequence can ensure that the PAPR of the DMRS symbol is not higher than the PAPR of the data symbol in a manner in which the DMRS sequence and the first data signal use frequency division multiplexing.

[0116] In some implementations of the fifth aspect, the DMRS sequence is generated based on a Pi / 2-BPSK symbol sequence, including: in a case where an order of a modulation scheme corresponding to the second data signal is greater than or equal to a first threshold, generating the DMRS sequence based on the Pi / 2-BPSK symbol sequence. Based on the above technical solution, it can be ensured that the PAPR of the DMRS symbol is not higher than the PAPR of the data symbol in a manner in which the DMRS sequence and the first data signal use frequency division multiplexing.

[0117] In some implementations of the fifth aspect, the first data signal is obtained by modulating a first bit stream based on a first modulation scheme, and the second data signal is obtained by modulating a second bit stream based on a second modulation scheme, where an order of the first modulation scheme is lower than an order of the second modulation scheme. Based on the above technical solution, by constraining the order of the first modulation scheme to be lower than the order of the second modulation scheme, it can be ensured that the PAPR of the DMRS symbol is not higher than the PAPR of the data symbol in a manner in which the DMRS sequence and the first data signal use frequency division multiplexing.

[0118] In some implementations of the fifth aspect, the EPRE of the first data signal is lower than the EPRE of the DMRS sequence. According to the above technical solution, in the case that the order of the modulation scheme (first modulation scheme) of the first data signal is lower than the order of the modulation scheme (second modulation scheme) of the second data signal, further constraining the EPRE of the first data signal to be lower than the EPRE of the DMRS sequence can ensure that the PAPR of the DMRS symbol (the time domain symbol in which the DMRS sequence and the first data signal are multiplexed) is not higher than the PAPR of the data symbol (the time domain symbol of the second data signal).

[0119] In some implementations of the fifth aspect, the reference signal includes the first data signal and the DMRS sequence, and the method further includes: in the case that the order of the second modulation scheme is greater than or equal to a second threshold, the reference signal includes the first data signal and the DMRS sequence.

[0120] In some implementations of the fifth aspect, the reference signal includes the first data signal and the DMRS sequence, and the method further includes: receiving indication information, the indication information being used to indicate that the reference signal includes the first data signal.

[0121] In some implementations of the fifth aspect, the first bit stream and the second bit stream belong to the same code word, or the first bit stream and the second bit stream belong to different code words.

[0122] In some implementations of the fifth aspect, the reference signal and the second data signal occupy different bandwidths.

[0123] In some implementations of the fifth aspect, the first bandwidth expansion coefficient is greater than or equal to the second bandwidth expansion coefficient, where the first bandwidth expansion coefficient is a ratio of the bandwidth occupied by the first signal included in the reference signal to the bandwidth occupied by the reference signal, and the second bandwidth expansion coefficient is a ratio of the bandwidth occupied by the second signal included in the second data signal to the bandwidth occupied by the second data signal. Based on the above technical solution, in the case that the DMRS sequence and the first data signal use frequency division multiplexing, the PAPR of the DMRS symbol can be ensured to be not higher than the PAPR of the data symbol.

[0124] In a sixth aspect, a communication method is provided, which is performed by a receiving end. In the case that no special description is given, the "receiving end" in the present application can refer to the receiving end itself (such as an SMF network element, an AMF network element, etc.), a component (such as a processor, a chip, or a chip system, etc.) in the receiving end, or a logic module or software capable of realizing all or part of the functions of the receiving end.

[0125] The method comprises: receiving a reference signal and a second data signal, the reference signal comprising a first data signal and a DMRS sequence, the first data signal and the DMRS sequence being located in different frequency domain resources, the reference signal and the second data signal being located in different time domain resources; wherein the reference signal further comprises a first signal, the first signal occupying first reserved subcarriers, the second data signal further comprises a second signal, the second signal occupying second reserved subcarriers, the number of the first reserved subcarriers being greater than the number of the second reserved subcarriers, and / or the reference signal and the second data signal have undergone FDSS processing.

[0126] Optionally, in a possible implementation manner, the number of the second reserved subcarriers is 0, and the number of the first reserved subcarriers is a positive integer greater than 0. That is, the second data signal does not carry the second signal.

[0127] It should be understood that the first signal and the second signal can also be referred to as reserved signals, and the present application does not limit this.

[0128] The beneficial effects of the sixth aspect and the implementation manners thereof can be referred to the beneficial effects of the fifth aspect and the implementation manners thereof, which will not be described herein.

[0129] In combination with the sixth aspect, in some implementation manners of the sixth aspect, the first reserved subcarriers and the DMRS sequence are located in different subcarriers, wherein the first reserved subcarriers are located at one side or both sides of the frequency domain resources occupied by the reference signal; and / or the first reserved subcarriers are uniformly placed on the frequency domain resources occupied by the reference signal.

[0130] In combination with the sixth aspect, in some implementation manners of the sixth aspect, the second reserved subcarriers are located at one side or both sides of the frequency resources occupied by the second data signal; and / or the second reserved subcarriers are uniformly placed on the frequency domain resources occupied by the second data signal.

[0131] In combination with the sixth aspect, in some implementation manners of the sixth aspect, the reference signal and the second data signal have undergone FDSS processing, comprising: the window function used for FDSS processing of the reference signal is different from the window function used for FDSS processing of the second data signal.

[0132] In combination with the sixth aspect, in some implementation manners of the sixth aspect, the reference signal and the second data signal have undergone FDSS processing, comprising: the roll-off coefficient of the window function used for FDSS processing of the reference signal is greater than the roll-off coefficient of the window function used for FDSS processing of the second data signal.

[0133] In combination with the sixth aspect, in some implementation manners of the sixth aspect, the DMRS sequence is generated based on a ZC column, and the root of the ZC sequence is one of a first root set.

[0134] With reference to the sixth aspect, in some implementations of the sixth aspect, the first root set is related to a length of the ZC sequence.

[0135] With reference to the sixth aspect, in some implementations of the sixth aspect, the DMRS sequence is generated based on a Pi / 2-BPSK symbol sequence.

[0136] With reference to the sixth aspect, in some implementations of the sixth aspect, the DMRS sequence is generated based on a Pi / 2-BPSK symbol sequence, including: in a case where an order of the modulation scheme corresponding to the second data signal is greater than or equal to a first threshold, generating the DMRS sequence based on the Pi / 2-BPSK symbol sequence.

[0137] With reference to the sixth aspect, in some implementations of the sixth aspect, the first data signal is obtained by modulating a first bit stream based on a first modulation scheme, and the second data signal is obtained by modulating a second bit stream based on a second modulation scheme, where an order of the first modulation scheme is lower than an order of the second modulation scheme.

[0138] With reference to the sixth aspect, in some implementations of the sixth aspect, an EPRE of the first data signal is lower than an EPRE of the DMRS sequence.

[0139] With reference to the sixth aspect, in some implementations of the sixth aspect, the reference signal includes the first data signal and the DMRS sequence, including: in a case where the order of the second modulation scheme is greater than or equal to a second threshold, the reference signal includes the first data signal and the DMRS.

[0140] With reference to the sixth aspect, in some implementations of the sixth aspect, the method further includes: sending indication information, the indication information being used to indicate that the reference signal includes the first data signal.

[0141] With reference to the sixth aspect, in some implementations of the sixth aspect, the first bit stream and the second bit stream belong to a same code word; or the first bit stream and the second bit stream belong to different code words.

[0142] With reference to the sixth aspect, in some implementations of the sixth aspect, the reference signal and the second data signal occupy different bandwidths.

[0143] With reference to the sixth aspect, in some implementations of the sixth aspect, the first bandwidth spreading factor is greater than or equal to the second bandwidth spreading factor, wherein the first bandwidth spreading factor is a ratio of a bandwidth occupied by a first signal included in the reference signal to a bandwidth occupied by the reference signal, and the second bandwidth spreading factor is a ratio of a bandwidth occupied by a second signal included in the second data signal to a bandwidth occupied by the second data signal.

[0144] The seventh aspect provides a communication apparatus, including: a transceiver, a processing unit, and the like.

[0145] With reference to the seventh aspect, in some implementations of the seventh aspect, the communication apparatus is configured to perform the method of the first aspect and any of the implementations of the first aspect, or the method of the second aspect and any of the implementations of the second aspect, or the method of the third aspect and any of the implementations of the third aspect, or the method of the fourth aspect and any of the implementations of the fourth aspect, or the method of the fifth aspect and any of the implementations of the fifth aspect, or the method of the sixth aspect and any of the implementations of the sixth aspect.

[0146] The eighth aspect provides a chip, including a processor, the processor and a memory are coupled, the memory is configured to store a computer program, and the processor is configured to execute the computer program stored in the memory to implement the method of the first aspect and any of the implementations of the first aspect, or the processor is configured to execute the computer program stored in the memory to implement the method of the second aspect and any of the implementations of the second aspect, or the processor is configured to execute the computer program stored in the memory to implement the method of the third aspect and any of the implementations of the third aspect, or the processor is configured to execute the computer program stored in the memory to implement the method of the fourth aspect and any of the implementations of the fourth aspect, or the processor is configured to execute the computer program stored in the memory to implement the method of the fifth aspect and any of the implementations of the fifth aspect, or the processor is configured to execute the computer program stored in the memory to implement the method of the sixth aspect and any of the implementations of the sixth aspect.

[0147] In a ninth aspect, a computer readable storage medium is provided, having stored thereon a computer program or instructions, which when executed by a processor, causes the method of the first aspect and any possible implementation of the first aspect to be performed or the method of the second aspect and any possible implementation of the second aspect to be performed or the method of the third aspect and any possible implementation of the third aspect to be performed or the method of the fourth aspect and any possible implementation of the fourth aspect to be performed or the method of the fifth aspect and any possible implementation of the fifth aspect to be performed or the method of the sixth aspect and any possible implementation of the sixth aspect to be performed.

[0148] In a tenth aspect, a computer program product is provided, comprising instructions, which when executed on a computer, cause the method of the first aspect and any possible implementation of the first aspect to be performed or the method of the second aspect and any possible implementation of the second aspect to be performed or the method of the third aspect and any possible implementation of the third aspect to be performed or the method of the fourth aspect and any possible implementation of the fourth aspect to be performed or the method of the fifth aspect and any possible implementation of the fifth aspect to be performed or the method of the sixth aspect and any possible implementation of the sixth aspect to be performed.

[0149] In an eleventh aspect, a communication system is provided, comprising a terminal device configured to perform the method of the first aspect and any possible implementation of the first aspect, and a first network element configured to perform the method of the second aspect and any possible implementation of the second aspect; or the terminal device configured to perform the method of the third aspect and any possible implementation of the third aspect, and the first network element configured to perform the method of the fourth aspect and any possible implementation of the fourth aspect; or the terminal device configured to perform the method of the fifth aspect and any possible implementation of the fifth aspect, and the first network element configured to perform the method of the sixth aspect and any possible implementation of the sixth aspect.

[0150] The advantages of the seventh aspect to the eleventh aspect can refer to the advantages of the first aspect to the sixth aspect, which are not repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0151] FIG. 1 is a schematic diagram of DMRS and data frequency division multiplexing in a DMRS symbol.

[0152] FIG. 2 is a schematic diagram of a communication system suitable for use with the present application.

[0153] FIG. 3 is a schematic diagram of a processing flow of a DFT-s-OFDM technique.

[0154] FIG. 4 is a schematic diagram of OFDM / DFT-s-OFDM signal generation with sequence spreading and FDSS.

[0155] FIG. 5 is a schematic flowchart of a communication method 500 according to an embodiment of the present application.

[0156] FIG. 6 is a PAPR comparison diagram of a reference signal and a second data signal.

[0157] FIG. 7 is a schematic diagram of frequency domain positions of a first reserved subcarrier and a second reserved subcarrier according to an embodiment of the present application.

[0158] FIG. 8 is a schematic flowchart of a communication method 800 according to another embodiment of the present application.

[0159] FIG. 9 is a schematic flowchart of a communication method 900 according to another embodiment of the present application.

[0160] FIG. 10 is a schematic block diagram of a communication apparatus 1000 according to an embodiment of the present application.

[0161] FIG. 11 is another communication apparatus 1100 according to an embodiment of the present application.

[0162] FIG. 12 is a chip system 1200 according to an embodiment of the present application. DETAILED DESCRIPTION

[0163] In order to facilitate understanding of the embodiments of the present application, the following points are first explained.

[0164] First, in the present application, "for indicating" can include direct indication and indirect indication. When describing that certain indication information is for indicating A, it can include that the indication information directly indicates A or indirectly indicates A, and does not mean that A must be carried in the indication information.

[0165] The information indicated by the indication information is referred to as to-be-indicated information. In the specific implementation process, there are many ways to indicate the to-be-indicated information, for example, but not limited to, the to-be-indicated information can be directly indicated, such as the to-be-indicated information itself or an index of the to-be-indicated information. The to-be-indicated information can also be indirectly indicated by indicating other information, where the other information and the to-be-indicated information have an association relationship. The to-be-indicated information can also be indicated only by a part of the to-be-indicated information, and the other part of the to-be-indicated information is known or agreed in advance. For example, the indication of a specific information can also be realized by means of the arrangement order of each information agreed in advance (for example, a protocol stipulates), thereby reducing the indication overhead to a certain extent. At the same time, the common part of each information can be identified and uniformly indicated, so as to reduce the indication overhead caused by separately indicating the same information.

[0166] Second, "at least one" in the present application means one or more, and "more than one" means two or more (including two). In addition, in the embodiments of the present application, "first", "second", and various numerical numbers (for example, "#1", "#2", and the like) are only used for the convenience of description and do not limit the scope of the embodiments of the present application. The size of the serial number of each process below does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. It should be understood that the objects thus described can be interchanged under appropriate circumstances, so as to be able to describe solutions other than the embodiments of the present application. In addition, in the embodiments of the present application, "S410" and the like are only used for the convenience of description and are not limited to the order of execution steps.

[0167] Third, in the embodiments of the present application, "exemplary" or "for example" and the like are used to represent an example, illustration or description. Any embodiment or design scheme described as "exemplary" or "for example" in the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the use of "exemplary" or "for example" and the like is intended to present the relevant concept in a specific manner.

[0168] Fourth, in the embodiments of the present application, "protocol" can refer to a standard protocol in the communication field, which can include NR protocol and related protocols applied in future communication systems, and the present application does not limit this.

[0169] Fifth, in the embodiments of the present application, "of", "corresponding", "corresponding" and "associated" can be used interchangeably at times. It should be pointed out that when the distinction is not emphasized, the meanings expressed are consistent.

[0170] Sixth, in the embodiments of the present application, "in the case of" can be replaced by "when", "if", and the like. It should be pointed out that when the distinction is not emphasized, the meanings expressed are consistent.

[0171] Seventh, the term "and / or" in the present application is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. In addition, the character " / " in the present application generally represents an "or" relationship between the associated objects before and after it.

[0172] In the present application, "sending" and "receiving" represent the direction of signal transmission. For example, "sending information to XX" can be understood as that the destination of the information is XX, and "sending information" can include direct sending and indirect sending through other units or modules. "Receiving information from YY" can be understood as that the source of the information is YY, and "receiving information" can include direct receiving from YY and indirect receiving from YY through other units or modules. In addition, "sending" can also be understood as the "output" of the chip interface, and "receiving" can also be understood as the "input" of the chip interface. In other words, "sending" or "receiving" can be carried out between devices, for example, sending or receiving through the air interface between network devices and terminal devices, and "sending" or "receiving" can also be carried out within the device, for example, sending or receiving between components, modules, chips, software modules or hardware modules within the device through buses, wires or interfaces.

[0173] The technical solutions in the present application will be described below with reference to the drawings.

[0174] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD), a universal mobile communication system (UMTS), a worldwide interoperability for microwave access (WiMAX) communication system, a 5th generation (5G) system or new radio (NR), and future communication systems, vehicle-to-X (V2X), which can include vehicle to network (V2N), vehicle to vehicle (V2V), vehicle to infrastructure (V2I), vehicle to pedestrian (V2P), etc., LTE-V, Internet of Vehicles, machine type communication (MTC), Internet of Things (IoT), LTE-M, machine to machine (M2M), etc.

[0175] FIG. 2 is a schematic diagram of a communication system suitable for use with the present application. As shown in FIG. 2, the communication system 100 includes at least one network device, such as the network device 111, the network device 112, and the network device 113 shown in FIG. 1. The wireless communication system can also include at least one terminal device, such as the terminal device 121, the terminal device 122, the terminal device 123, the terminal device 124, the terminal device 125, the terminal device 126, and the terminal device 127 shown in FIG. 1.

[0176] Exemplarily, communications can be conducted between network devices and terminal devices, including but not limited to: multi-site transmission, enhanced mobile broadband (eMBB) transmission, etc., wherein network device 112 and network device 113 as shown in FIG. 1 can conduct multi-site transmission with terminal device 124, and network device 112 as shown in FIG. 1 can conduct eMBB transmission with terminal device 121, terminal device 122 and terminal device 123.

[0177] Exemplarily, communications can also be conducted between network devices, including but not limited to: backhaul, wherein network device 111 and network device 112 as shown in FIG. 1 can conduct communication through backhaul, and network device 111 and network device 113 can also conduct communication through backhaul, wherein network device 112 and network device 113 can play the role of relay nodes in the system.

[0178] Exemplarily, communications can also be conducted between terminal devices, including but not limited to: device-to-device (D2D) transmission, wherein terminal device 122 as shown in FIG. 1 can conduct communication with terminal device 125 through D2D transmission.

[0179] A network device is a network-side device with wireless transceiving function. The network device can be an apparatus in a radio access network (RAN) that provides wireless communication function for terminal devices. The network device can be a 3rd generation partnership project (3GPP)-related cellular system, such as a 5G mobile communication system or a future-oriented evolved system. The network device can also be an open radio access network (O-RAN or ORAN), a cloud radio access network (CRAN), or a wireless fidelity (WiFi) system. For example, the network device can be a base station, an evolved NodeB (eNodeB), a next generation NodeB (gNB) in a 5G mobile communication system, a base station in a subsequent evolution of 3GPP, a transmission reception point (TRP), an access node in a WiFi system, a wireless relay node, a wireless backhaul node, or the like. In a communication system employing different radio access technologies (RATs), the name of a device with base station function can be different. For example, it can be referred to as an eNB or eNodeB in an LTE system, or a gNB in a 5G or NR system, and the specific name of the base station is not limited in the present application. The network device can include one or more co-sited or non-co-sited transmission reception points. For another example, the network device can include at least one of one or more central units (CUs), one or more distributed units (DUs), and one or more radio units (RUs).

[0180] In different systems, the CU (or CU-CP and CU-UP), DU or RU can also have different names, but those skilled in the art can understand their meanings. For example, in an open RAN (ORAN) system, the CU can also be referred to as an O-CU (open CU), the DU can also be referred to as an O-DU (open DU), the CU-CP can also be referred to as an O-CU-CP, the CU-UP can also be referred to as an O-CU-UP, and the RU can also be referred to as an O-RU. Any of the CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module. Exemplarily, the functions of the CU can be implemented by one entity or different entities. For example, the functions of the CU are further divided, i.e., the control plane and the user plane are separated and implemented by different entities, which are a control plane CU entity (i.e., a CU-CP entity) and a user plane CU entity (i.e., a CU-UP entity), respectively. The CU-CP entity and the CU-UP entity can be coupled with the DU to jointly complete the functions of the access network device. For example, the CU is responsible for processing non-real-time protocols and services, implementing radio resource control (RRC), and the functions of the packet data convergence protocol (PDCP) layer. The DU is responsible for processing physical layer protocols and real-time services, implementing the functions of the radio link control (RLC) layer, the media access control (MAC) layer and the physical (PHY) layer. In this way, part of the functions of the wireless access network device can be implemented by multiple network function entities. These network function entities can be network elements in a hardware device, or software functions running on a dedicated hardware, or virtualized functions instantiated on a platform (e.g., a cloud platform). The network device can also include an active antenna unit (AAU). The AAU implements part of the physical layer processing functions, radio frequency processing and related functions of the active antenna. Since the information of the RRC layer will eventually become the information of the PHY layer, or be converted from the information of the PHY layer, in this architecture, high-layer signaling, such as RRC layer signaling, can also be considered as being sent by the DU, or by the DU+AAU. It can be understood that the network device can be a device including one or more of the CU node, the DU node and the AAU node. In addition, the CU can be divided into a network device in a radio access network (RAN), or the CU can be divided into a network device in a core network (CN), which is not limited in this application.For another example, in vehicle to everything (V2X) technology, the access network device can be a road side unit (RSU). A plurality of access network devices in a communication system can be base stations of the same type or base stations of different types. A base station can communicate with a terminal device directly or through a relay station. In embodiments of the present application, the device for implementing the function of a network device can be the network device itself or a device capable of supporting the network device to implement the function, such as a chip system or a combination device or component capable of implementing the function of an access network device, which can be installed in the network device. In embodiments of the present application, the chip system can be composed of a chip or can include a chip and other discrete devices.

[0181] The terminal device is a user-side device with wireless transceiver function, which can be a fixed device, a mobile device, a handheld device (such as a mobile phone), a wearable device, a vehicle-mounted device, or a wireless device (such as a communication module, a modem, or a chip system) built into the above devices. The terminal device is used to connect people, things, machines, etc., 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, Internet of Things, virtual reality (VR), augmented reality (AR), industrial control, self-driving, remote medical, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, unmanned aerial vehicle, robot, etc. For example, the terminal device can be a handheld terminal in cellular communication, a communication device in D2D, an Internet of Things device in MTC, a monitoring camera in smart transportation and smart city, or a communication device on an unmanned aerial vehicle, etc. The terminal device can also be 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. The terminal device can also be a terminal device in an IoT system. IoT is an important part of future information technology development, and its main technical feature is to connect objects through communication technology and network, so as to realize the intelligent network of man-machine interconnection and object-object interconnection. In the embodiments of the present application, IoT technology can achieve massive connection, deep coverage, and terminal power saving through, for example, narrow band (NB) technology. In the embodiments of the present application, the device for realizing the function of the terminal device can be a terminal device, or a device capable of supporting the terminal device to realize the function, such as a chip system or a combination device or component that can realize the function of the terminal device, which can be installed in the terminal device.

[0182] The network device and the terminal device can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; can also be deployed on the water surface; and can also be deployed on airplanes, balloons and satellites in the air. The scenarios in which the network device and the terminal device are located are not limited in the embodiments of the present application.

[0183] Exemplarily, the communication system 100 can further include an application function (AF) network element, which is a control plane network function provided by an operator network, and is used to provide application layer information; and the communication system 100 can further include a session management function (SMF) network element, which is a control plane network function provided by an operator network. In the embodiment of the application, in the case where the communication system 100 includes the AF network element and the SMF network element, the AF can send service-related information to the network device through the SMF.

[0184] In order to facilitate understanding of the embodiments of the application, first, the basic concepts involved in the application are described.

[0185] 1. Peak to average power ratio (PAPR): The wireless signal is observed from the time domain as a sinusoidal wave with varying amplitude, and the amplitude is not constant. The signal amplitude peak in one period is not the same as the amplitude peak in other periods, so the average power and the peak power of each period are not the same. In a long period of time, the peak power is the maximum transient power that occurs with a certain probability, and the probability is usually 0.01% (i.e. 10 -4 ). The ratio of the peak power at this probability to the total average power of the system is the PAPR.

[0186] PAPR is defined as the ratio of the maximum power of the signal envelope (P peak ) to the average power (P avg ), expressed in decibels (dB), that is

[0187] It should be understood that PAPR is a value that measures the degree of fluctuation of the envelope. The greater the PAPR, the greater the degree of fluctuation of the envelope.

[0188] 2. Harm of excessively high PAPR: The signal of the wireless communication system needs to be transmitted to a remote place and needs to be power amplified. Due to the limitation of technology and equipment cost, a power amplifier is usually linearly amplified within a certain range, and if the range is exceeded, the signal will be distorted. Signal distortion can cause the receiving end of the received signal to be unable to correctly parse the signal. In order to ensure that the peak value of the signal is still within the linear range of the power amplifier that can normally amplify the power, it is necessary to reduce the average power of the transmitted signal. This way will cause the power amplifier to be low in efficiency, or equivalent to a smaller coverage range.

[0189] 3. OFDM: a sequence S d with N m symbols (equal to s m) mapped to corresponding subcarriers, through weighting (that is, precoding, frequency domain windowing, power control, etc.), and then inverse Fourier transform to obtain the time domain signal x m . Optionally, a cyclic prefix is added. Since the signal on a certain carrier of OFDM is represented as a sinc function, there will be a tail on the left and right sides. The tails of multiple carriers may, under certain probabilities, superimpose to form a point with very high peak power at a distance, that is, the use of OFDM waveform is prone to cause the problem of excessively high PAPR.

[0190] Therefore, in order to meet the coverage requirement, a signal generation technology with low PAPR needs to be selected.

[0191] 4. Single carrier: in order to reduce the PAPR of the OFDM waveform, a single carrier waveform can be used to transmit data. A single carrier can be understood as follows: a sequence S d with N m symbols is subjected to N d point Fourier transform to obtain a frequency domain signal S m , which is mapped to corresponding subcarriers, through weighting (that is, precoding, frequency domain windowing, power control, etc.), inverse Fourier transform, to obtain a time domain signal X m . Finally, a cyclic prefix is optionally added. The single carrier includes but is not limited to the following waveforms:

[0192] Single carrier-quadrature amplitude modulation (SC-QAM) waveform, single carrier-offset quadrature amplitude modulation (SC-OQAM) waveform, DFT-s-OFDM waveform, etc. In the embodiments of the present application, the network device and the terminal device can use the single carrier introduced above to communicate.

[0193] In the present application, the DFT-s-OFDM waveform is mainly involved, and the DFT-s-OFDM technology is introduced as follows.

[0194] 5、DFT-s-OFDM: is a single-carrier technology based on OFDM waveform. Under the same power amplifier, DFT-s-OFDM waveform can provide greater output power and higher power amplifier efficiency than the above-mentioned OFDM waveform, thereby improving coverage and reducing energy consumption. In some embodiments, the DFT-s-OFDM signal is at least one of the following signals: DFT-s-OFDM with FDSS (frequency-domain spectral shaping), DFT-s-OFDM signal carrying real and imaginary part separation, DFT-s-OFDM signal carrying pulse amplitude modulation (PAM) constellation, DFT-s-OFDM signal carrying real and imaginary part separation with additive filter, DFT-s-OFDM signal carrying PAM constellation with additive filter, and SC-OQAM signal.

[0195] The DFT-s-OFDM waveform can be applied to uplink transmission, but in high-frequency communication, due to the limitation of device capability, the PAPR problem is more serious, so the DFT-s-OFDM waveform can also be applied to downlink transmission. Among them, the frequency band of high-frequency communication can be 24250MHz to 52600MHz in the NR system, and can also be a frequency band above 52600MHz supported by the subsequent evolution of the NR system, or can also be a higher frequency band of the next generation communication system, such as a terahertz (THz) frequency band.

[0196] The DFT-s-OFDM technology has a discrete Fourier transform (DFT) processing before the OFDM processing process, so the DFT-s-OFDM technology can also be called linear precoding OFDM technology. In order to facilitate understanding, the DFT-s-OFDM technology is briefly introduced in conjunction with FIG. 2.

[0197] FIG. 3 is a processing flow diagram of a DFT-s-OFDM technology.

[0198] The sending end sequentially performs serial-to-parallel conversion, M-point discrete Fourier transformation (DFT), subcarrier mapping, N-point inverse discrete Fourier transform (IDFT), parallel-to-serial conversion, cyclic prefix (CP) addition, digital-to-analog conversion (DAC), and the like on the time-domain discrete sequence, and then sends the signal through an antenna port and a channel.

[0199] When the receiving end receives the signal through the channel and the antenna, the signal is sequentially subjected to analog-to-digital conversion (ADC), cyclic prefix removal, serial-to-parallel conversion, N-point DFT, subcarrier demapping, M-point IDFT, and parallel-to-serial conversion to obtain a time-domain discrete sequence.

[0200] The sending end can obtain a frequency-domain sequence of the time-domain discrete sequence through M-point DFT. The frequency-domain sequence is input into IDFT after subcarrier mapping, and N-point IDFT is performed, where M < N. Because the length of IDFT is greater than that of DFT, the part of IDFT is padded with zeros. After IDFT, cyclic prefix addition can avoid symbol interference.

[0201] Compared with general OFDM, the PAPR of DFT-s-OFDM is relatively low, which can improve the power transmission efficiency of a mobile terminal, prolong the use time of a battery, and reduce the cost of a terminal.

[0202] 5. Pilot: also referred to as a reference signal, the pilot involved in the present application includes but is not limited to the following reference signals:

[0203] 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), sensing reference signals (SeRS), etc.

[0204] It should be understood that the pilot in the present application can also be a signal capable of being carried in OFDM or single carrier other than the above-mentioned enumerated reference signals, which will not be enumerated one by one here.

[0205] 6. OFDM pilot: OFDM pilot can be directly transmitted on each subcarrier in the frequency domain, and the OFDM pilot and the data subcarrier are orthogonal without interference. The receiver can estimate the channel corresponding to each OFDM pilot subcarrier, and then obtain the channel of the entire frequency band, that is, all subcarriers, and then equalize (remove the channel influence) and demodulate the data carried on other data subcarriers.

[0206] 7. Antenna port: Antenna port is a logical concept, and one antenna port can correspond to one physical transmitting antenna or multiple physical transmitting antennas. In these two cases, the receiver of the terminal does not decompose the signal from the same antenna port. Because from the perspective of the terminal, whether the channel is formed by a single physical transmitting antenna or combined by multiple physical transmitting antennas, the reference signal corresponding to the antenna port defines the antenna port, for example, the DMRS port corresponding to the demodulation reference signal (DMRS), and the terminal can obtain the channel estimation of the antenna port according to the reference signal. Each antenna port corresponds to a time / frequency resource grid, and has its own reference signal. One antenna port is one channel, and the terminal performs channel estimation and data demodulation according to the reference signal corresponding to the antenna port.

[0207] 8、Roll-off factor: generally used to describe the steepness of the Nyquist filter frequency response function with frequency. Using the roll-off factor can reduce the difficulty of filter implementation, but increases the bandwidth. Among them, the bandwidth beyond the Nyquist frequency 1 / 2T is called the transition bandwidth, and the roll-off factor is defined as the ratio of the transition bandwidth to the Nyquist frequency.

[0208] 9、Frequency-domain spectral shaping (FDSS) + sequence spreading: FDSS can be understood as a frequency signal S k Do a windowing process. Mathematically described as shown in the following formula (2):

[0209] Where c[i] is the i-th coefficient of the FDSS window function. Mapping to the N SC =M subcarriers.

[0210] It should be noted that the benefits of doing FDSS are as follows:

[0211] On the one hand, in the integrated sensing and communication (ISAC) scenario, reduce the sidelobe of the ambiguity function, and improve the sensing performance.

[0212] On the other hand, it can improve the PAPR performance of the DFT-s-OFDM signal, which helps to increase the transmit signal power and improve the coverage.

[0213] Because FDSS makes the amplitude (energy) of some S k [i] detection / demodulation performance loss. In order to alleviate / avoid the loss of demodulation performance caused by FDSS, generally S k Do sequence expansion before doing FDSS, as shown in FIG. 4. FIG. 4 is a schematic diagram of DFT-s-OFDM signal generation with sequence expansion and FDSS. S k Do sequence expansion to get N sc Long sequence Then do FDSS to get N sc Long sequence The relationship between And

[0214] It should be understood that there are many ways to extend the sequence, and the application does not limit the way of extending the sequence. The sequence extension actually increases the redundancy, which is beneficial to improve the demodulation performance.

[0215] 10. Tone reservation (TR): Tone reservation is also a technique for reducing the PAPR of the transmitted signal. A part of the subcarriers in the transmission bandwidth is used to transmit data, and the remaining subcarriers are called reserved subcarriers. Among them, the reserved subcarriers carry a reserved signal, which functions to reduce the PAPR of the OFDM / DFT-s-OFDM signal corresponding to the data subcarriers.

[0216] At present, the DMRS symbol can be designed in the manner shown in FIG. 1, that is, the DMRS sequence and the data are frequency division multiplexed. This has the advantages of improving the spectral efficiency and reducing the demodulation delay. However, frequency division multiplexing of the DMRS sequence and the data can worsen the PAPR of the DMRS symbol, so that the PAPR of the DMRS symbol is higher than that of the data symbol.

[0217] Based on this, the application aims to provide a communication method, which can ensure that the PAPR of the DMRS symbol is not higher than that of the data symbol in the manner of frequency division multiplexing of the DMRS sequence and the data.

[0218] FIG. 5 is a schematic flowchart of a communication method 500 provided by an embodiment of the application. As shown in FIG. 5, the method at least includes the following steps.

[0219] S510, the sending end modulates the first bit stream based on a first modulation scheme to obtain a first data signal.

[0220] S520, the sending end modulates the second bit stream based on a second modulation scheme to obtain a second data signal.

[0221] Specifically, in step S510, the sending end modulates the first bit stream based on a first modulation scheme to obtain a first data signal can be roughly divided into several steps: first, the sending end modulates the first bit stream based on a first modulation scheme to obtain first data, and then the sending end performs DFT on the first data to obtain a first data signal. It should be understood that the above processing manner is only for illustration, and the application does not limit this.

[0222] Optionally, the sending end can also insert some other data in the first data, such as a phase tracking reference signal or a unique word. It should be understood that the application does not limit this.

[0223] Further, after obtaining the first data signal, the first data signal and the DMRS sequence can be obtained to generate a first composite signal based on a frequency-division multiplexing (FDM) manner. That is, the first data signal and the DMRS sequence are located on different frequency domain resources. For the convenience of understanding, the FDM manner is uniformly used instead of the FDM manner in the following description.

[0224] For example, in a possible implementation, the first data signal and the DMRS sequence can be obtained to generate the first composite signal based on the FDM manner. That is, in this case, the first composite signal is obtained based on the FDM manner from the first data signal and the DMRS sequence.

[0225] For example, in another possible implementation, the first data signal, the signal #1 and the DMRS sequence can also be obtained to generate the first composite signal based on the FDM manner. That is, in this case, the first composite signal is obtained based on the FDM manner from the first data signal, the DMRS sequence and the signal #1.

[0226] It should be noted that, in one case, the signal #1 can be a redundant signal, where the redundant signal can be understood as a signal occupying a bandwidth but not transmitting new information. Alternatively, in another case, the signal #1 can also be a reserved signal, where the reserved signal can be understood as a signal occupying a reserved subcarrier. The related description of the redundant signal and the reserved signal can be referred to the prior art, which is not described here.

[0227] Optionally, in a possible implementation, the signal #1 can also be generated based on the first data signal and the DMRS sequence.

[0228] Subsequently, after the first composite signal is obtained based on the FDM manner, the first composite signal needs to be processed to obtain the reference signal. For example, the first composite signal can be subjected to subcarrier mapping, IDFT, CP addition and the like to obtain the reference signal. It should be understood that the processing manner of obtaining the reference signal from the first composite signal is only for example, and the present application is not limited thereto.

[0229] Optionally, in a possible implementation, before the first composite signal is subjected to subcarrier mapping, IDFT, CP addition and the like, the first composite signal can also be subjected to FDSS processing.

[0230] It should be understood that in the embodiments of the present application, the reference signal can also be referred to as a DMRS symbol, wherein the DMRS symbol carries a DMRS sequence and the first data signal, and the DMRS sequence and the first data signal are located in the DMRS symbol in a frequency division multiplexing manner. In other words, the DMRS symbol in the embodiments of the present application can be considered as a time domain symbol in which the DMRS sequence and the first data signal are multiplexed.

[0231] In step S520, the sending end modulates the second bit stream based on the second modulation scheme to obtain a second data signal. The process can be roughly divided into several steps: first, the sending end modulates the second bit stream based on the second modulation scheme to obtain second data, and then the sending end performs DFT, subcarrier mapping, CP addition and DAC and the like on the second data to obtain a processed second data signal. It should be understood that the above processing manner is only for illustration, and the present application is not limited thereto. It should also be understood that in the embodiments of the present application, the second data signal can also be referred to as a data symbol, wherein the data symbol refers to a symbol carrying data. For the sake of brevity, the following will not be described in detail.

[0232] Optionally, the sending end can also insert some other data, such as a phase tracking reference signal or a unique word, into the second data. It should be understood that the present application is not limited thereto.

[0233] Optionally, in a possible implementation manner, the sending end can also perform FDSS processing on the frequency domain signal #1 before performing subcarrier mapping on the frequency domain signal #1, wherein the frequency domain signal #1 is obtained by performing DFT processing on the second data. For example, the sending end performs DFT, FDSS, subcarrier mapping, IDFT and CP addition and the like on the second data in sequence to obtain the second data signal.

[0234] Optionally, in a possible implementation manner, the sending end can also insert the second signal into the frequency domain signal #1 to obtain a second composite signal before performing subcarrier mapping on the frequency domain signal #1, and take the second composite signal as the input of the subcarrier mapping module, wherein the frequency domain signal #1 is obtained by performing DFT processing on the second data.

[0235] It should be noted that inserting the second signal into the frequency domain signal #1 to obtain a second composite signal can be understood as obtaining the second composite signal based on frequency division multiplexing of the frequency domain signal #1 and the signal #2. For example, the sending end performs DFT, signal #2 insertion, subcarrier mapping, IDFT and CP addition and the like on the second data in sequence to finally obtain the second data signal.

[0236] Since the second composite signal is obtained based on frequency division multiplexing of the frequency domain signal #1 and the signal #2, in another possible implementation, the transmitter can also perform subcarrier mapping on the frequency domain signal #1 and the signal #2 in a manner that subcarriers do not overlap. For example, the transmitter first performs DFT on the second data to obtain the frequency domain signal #1, and then performs subcarrier mapping, IDFT, and CP addition and the like on the frequency domain signal #1 and the signal #2 in a manner that subcarriers do not overlap, to finally obtain the second data signal.

[0237] Optionally, in a possible implementation, the transmitter can also perform FDSS processing on the second composite signal before performing subcarrier mapping on the second composite signal. For example, the transmitter performs DFT, signal #2 insertion, FDSS, subcarrier mapping, IDFT, and CP addition and the like on the second data in sequence, to finally obtain the second data signal.

[0238] It should be noted that in one case, the signal #2 can be a redundant signal, where the redundant signal can be understood as a signal occupying bandwidth but not transmitting new information. Alternatively, in another case, the signal #2 can also be a reserved signal, where the reserved signal can be understood as a signal occupying reserved subcarriers. The related description of the redundant signal and the reserved signal can be referred to the prior art, which will not be described here.

[0239] Optionally, in a possible implementation, the signal #2 can be generated based on the frequency domain signal #1.

[0240] It should be noted that in the embodiments of the present application, the order of the first modulation scheme is lower than the order of the second modulation scheme. That is, the order of the modulation scheme used to obtain the first data signal is lower than the order of the modulation scheme used to obtain the second data signal.

[0241] For example, in a possible implementation, the first modulation scheme can be QPSK modulation, and the second modulation scheme can be 16-QAM modulation.

[0242] For example, in a possible implementation, the first modulation scheme can be QPSK modulation, and the second modulation scheme can be 64-QAM modulation.

[0243] For example, in a possible implementation, the first modulation scheme can be 16-QAM modulation, and the second modulation scheme can be 64-QAM modulation.

[0244] It should be noted that the above examples are only for illustration, and the present application is not limited thereto.

[0245] According to the technical solution, by constraining the order of the first modulation scheme to be lower than the order of the second modulation scheme, the PAPR of the DMRS symbol (a time domain symbol in which the DMRS sequence and the first data signal are multiplexed) can be ensured to be not higher than the PAPR of the data symbol (a time domain symbol of the second data signal) in a frequency division multiplexing manner of the DMRS sequence and the first data signal.

[0246] However, the lower the order of the modulation scheme is, the lower the required signal-to-noise ratio (or demodulation signal-to-noise ratio) to achieve a given demodulation performance (such as a block error rate of 0.1) is. In the technical solution, the order of the first modulation scheme used by the first data signal (a data signal frequency-division multiplexed with the DMRS sequence) is constrained to be lower than the order of the second modulation scheme used by the second data signal, and then the required signal-to-noise ratio to achieve a given demodulation performance is determined by the signal-to-noise ratio of the second data signal, which is higher than the signal-to-noise ratio of the first data signal. That is to say, for the first data signal, the signal-to-noise ratio is excessive. In order not to make the signal-to-noise ratio of the first data signal excessive, the power of the first data signal can be reduced. Further, by reducing the power of the first data signal, the PAPR of the DMRS symbol (a time domain symbol in which the DMRS sequence and the first data signal are multiplexed) can be reduced.

[0247] Optionally, in a possible implementation, the energy per resource element (EPRE) of the first data signal is lower than the EPRE of the DMRS sequence. Alternatively, the ratio (EPRE ratio) between the EPRE of the first data signal and the EPRE of the DMRS sequence is less than 1. Wherein, the EPRE of the first data signal refers to the energy of each resource element (RE) carrying the first data signal, and the EPRE of the DMRS sequence refers to the energy of each RE carrying the DMRS sequence.

[0248] Taking the frequency domain positions of the DMRS sequence and the first data signal as shown in FIG. 1 as an example, as shown in FIG. 1, the density of the DMRS sequence is 1 / 2, at this time, the EPRE of the first data signal is equal to the EPRE of the DMRS sequence, that is to say, the ratio between the EPRE of the first data signal and the EPRE of the DMRS sequence is equal to 1, in this case, the power occupancy ratios of the DMRS sequence and the first data signal are the same, and each of them accounts for 50%. Wherein, the power occupancy ratio of the DMRS sequence is the ratio of the power of the DMRS sequence to the total power (i.e. the total power of the reference signal), and the power occupancy ratio of the first data signal is the ratio of the power of the first data signal to the total power (i.e. the total power of the reference signal).

[0249] In the embodiments of the present application, the power of the first data signal can be reduced by reducing the EPRE of the first data signal. Accordingly, in the case where the total power is unchanged, the power of the DMRS sequence is increased, and the EPRE of the DMRS sequence is also increased. At this time, the EPRE of the first data signal is lower than the EPRE of the DMRS sequence, or the power ratio of the first data signal is lower than the power ratio of the DMRS sequence, that is, there is a power offset between the first data signal and the DMRS sequence. For example, if the ratio between the EPRE of the first data signal and the EPRE of the DMRS sequence is equal to 1 / 3, the power ratio of the first data signal is 25%, and the power ratio of the DMRS sequence is 75%.

[0250] According to the above technical solution, by reducing the EPRE of the first data signal and increasing the EPRE of the DMRS sequence, the PAPR of the DMRS symbol (the time domain symbol in which the DMRS sequence and the first data signal are multiplexed) can be reduced.

[0251] FIG. 6 is a PAPR comparison diagram of a reference signal and a second data signal, in which the vertical coordinate is a complementary cumulative distribution function (CCDF), and the horizontal coordinate is a PAPR value. It is assumed that in a possible case, the modulation scheme adopted by the second data signal is 16QAM, the modulation scheme adopted by the first data signal is QPSK, and the DMRS sequence frequency-division-multiplexed with the first data signal is generated based on a ZC sequence (the root index of the ZC sequence is 2). The density of the DMRS sequence is 1 / 2. As can be seen from FIG. 6, when the ratio between the EPRE of the first data signal and the EPRE of the DMRS sequence is equal to 1 / 3, the PAPR of the reference signal is obviously reduced, and is obviously lower than the PAPR of the reference signal and the PAPR of the second data signal when the EPRE ratio is equal to 1. Therefore, it can be concluded that by making the EPRE of the first data signal lower than the EPRE of the DMRS sequence, the PAPR of the DMRS symbol (the time domain symbol in which the DMRS sequence and the first data signal are multiplexed) can be improved.

[0252] According to the above technical solution, in the case where the order of the modulation scheme of the first data signal is lower than the order of the modulation scheme of the second data signal, further constraining the EPRE of the first data signal to be lower than the EPRE of the DMRS sequence can ensure that the PAPR of the DMRS symbol (the time domain symbol in which the DMRS sequence and the first data signal are multiplexed) is not higher than the PAPR of the data symbol (the time domain symbol of the second data signal).

[0253] Further, in the embodiments of the present application, the first bit stream and the second bit stream are both encoded bit streams obtained after encoding. That is, the first bit stream can also be referred to as a first encoded bit stream, and the second bit stream can also be referred to as a second encoded bit stream. It should be understood that the present application does not limit this.

[0254] Optionally, in a possible implementation, the first bit stream and the second bit stream belong to the same code word.

[0255] Optionally, in another possible implementation, the first bit stream and the second bit stream belong to different code words.

[0256] Optionally, in another possible implementation, the first bit stream and the second bit stream belong to different code words.

[0257] It should be noted that the specific encoding manner adopted by the first bit stream and the second bit stream can refer to the existing protocol, which will not be described here.

[0258] It should be understood that the bit stream described above can also be referred to as a bit sequence, and correspondingly, the encoded bit stream described above can also be referred to as an encoded bit sequence. The present application does not limit this.

[0259] With reference to FIG. 5, the method further includes: S530, the sending end sends the reference signal and the second data signal to the receiving end, and correspondingly, the receiving end receives the reference signal and the second data signal. It should be understood that the reference signal is obtained after some processing of the first composite signal. The related description of the first composite signal and how to obtain the reference signal based on the first composite signal can refer to the foregoing description, which will not be described here.

[0260] Specifically, the reference signal and the second data signal are located in different time domain resources, for example, the reference signal and the second data signal are located in different symbols. In the embodiments of the present application, the reference signal can include the first data signal and the DMRS sequence. Since the first data signal and the DMRS sequence are obtained in a frequency division multiplexing manner, the first data signal and the DMRS sequence are located in different frequency domain resources, or in other words, the first data signal and the DMRS sequence are located in the reference signal in a frequency division multiplexing manner. It can be understood that the reference signal can carry the first data signal. Moreover, in the embodiments of the present application, the first data signal and the DMRS sequence occupy the same time domain resource, for example, the first data signal and the DMRS sequence occupy the same symbol.

[0261] Optionally, in a possible implementation, whether the first data signal and the DMRS sequence are located in the reference signal in a frequency division multiplexing manner is related to the order of the second modulation scheme.

[0262] For example, in one case, when the order of the second modulation scheme is greater than or equal to the second threshold, the first data signal and the DMRS sequence are located in the reference signal in a frequency division multiplexing manner. In another case, when the order of the second modulation scheme is less than the second threshold, the first data signal can not be carried in the reference signal as described above, that is, the reference signal as described above only includes the DMRS sequence and does not include the first data signal.

[0263] It should be noted that in one possible case, the second threshold as described above can be indicated by the network side to the sending end, for example, the network side sends indication information #1 to the terminal device, and the indication information #1 indicates the second threshold. Alternatively, in another possible case, the second threshold as described above can also be pre-defined by a protocol. For example, the second threshold is pre-set by the protocol, and the sending end further determines whether the reference signal carries the first data signal by comparing the order of the second modulation scheme with the size of the second threshold.

[0264] It should be understood that the present application does not limit the value of the second threshold. For example, the second threshold can be 1, or the second threshold can be 2.

[0265] Alternatively, in another possible implementation, whether the first data signal and the DMRS sequence are located in the reference signal in a frequency division multiplexing manner can also be specifically indicated by the network side to the sending end.

[0266] For example, in one case, the network side can send indication information #2 to the sending end, and the indication information #2 indicates that the reference signal does not carry the first data signal, or in other words, the indication information #2 indicates that the reference signal only includes the DMRS sequence.

[0267] For example, in another case, the network side can also send indication information #3 to the sending end, and the indication information #3 indicates that the reference signal carries the DMRS sequence, or in other words, the indication information #3 indicates that the reference signal includes the first data signal and the DMRS sequence.

[0268] Alternatively, in one possible implementation, in the embodiments of the present application, the DMRS sequence can be generated based on a Zadoff-Chu sequence (hereinafter referred to as a ZC sequence).

[0269] Specifically, the root of the ZC sequence is one of a first root set, wherein the first root set is related to the length of the DMRS sequence. It should be understood that "related to" can be replaced by "related to" or "associated with", and the following will not be described in detail. For example, in NR, if the DMRS sequence is generated based on the ZC sequence, the generation manner of the DMRS sequence r(n) is shown in the following formula (4).

[0270] wherein q is a root of the ZC sequence, q is coprime with N ZC , N ZC is the length of the ZC sequence, M ZC is the length of the r(n) sequence, and N ZC is the largest prime number less than M ZC . For example, if M ZC = 72, then N ZC = 71. It should be noted that in the NR, the value range of q is {n = 0, 1, …, N zc - 1}.

[0271] Table 1 shows the PAPR values of the OFDM signal generated based on r(n) when the complementary cumulative distribution function of the OFDM signal is 0.01 under different root values, assuming that M ZC = 72. It should be noted that the OFDM signal only carries r(n) and does not carry the first data signal.

[0272] As can be seen from Table 1, the OFDM signal has different PAPR under different root values. The difference in PAPR between the worst q value selection and the best q value selection can reach 3 dB. Because frequency division multiplexing can make the PAPR of the reference signal high, it can be inferred that if the OFDM signal generated based on the DMRS sequence (r(n)) has a high PAPR, the PAPR of the reference signal including the DMRS sequence and the first data signal is also high. Therefore, to reduce the PAPR of the reference signal in which the DMRS sequence and the data are frequency-division multiplexed, the PAPR of the OFDM signal generated based on the DMRS sequence (r(n)) can be reduced first. For example, the selection of q can be limited, and a suitable q value can be selected to form a first root set, instead of having (N ZC - 1) choices of q as in the NR.

[0273] Table 1 PAPR values of the OFDM signal generated based on the DMRS sequence r(n) under different root values

[0274] For example, assuming that M ZC = 36 and the size of the first root set is limited to 10, the first root set is {35, 36, 1, 70, 24, 47, 18, 53, 10, 14}. That is, the value of q is any one in the first root set.

[0275] For example, assuming that M ZC = 72 and the size of the first root set is limited to 10, the first root set is {5, 26, 8, 23, 7, 15, 16, 24, 10, 21}. That is, the value of q is any one in the first root set.

[0276] For example, assume M ZC = 120, and the size of the first root set is defined as 10, then the first root set is {45, 68, 19, 94, 38, 75, 15, 36, 77, 98}. That is, the value of q is any one of the first root set.

[0277] In combination with the above example, it can be obtained that the first root set is associated with the length of the DMRS sequence, that is, the value of the root in the first root set is related to the length of the DMRS sequence (M ZC ).

[0278] It should be understood that the length of the ZC sequence is related to the length of the DMRS sequence, and the length of the DMRS sequence is related to the transmission bandwidth, and therefore, the root value included in the first root set will also change with the change of the transmission bandwidth. Based on the above technical solution, it can be ensured that the PAPR of the DMRS symbol is not higher than the PAPR of the data symbol under different transmission bandwidths.

[0279] Optionally, in a possible implementation, the DMRS sequence described above is generated based on a Pi / 2-BPSK symbol sequence.

[0280] Specifically, it can be that the Gold sequence (also referred to as a pseudo-random sequence) or the Golay complementary pair sequence is first modulated by Pi / 2-BPSK, and then DFT is performed to obtain the DMRS sequence.

[0281] It should be noted that, in a possible case, whether the DMRS sequence described above is generated based on the Pi / 2-BPSK symbol sequence is also related to the modulation order of the second modulation scheme, for example, in the case where the order of the second modulation scheme is greater than or equal to a first threshold, the DMRS sequence is generated based on the Pi / 2-BPSK symbol sequence.

[0282] It should be noted that the first threshold can be pre-set, and it should be understood that the present application does not limit the integral of the first threshold, for example, the value of the first threshold can be 2, or the value of the first threshold can be 4.

[0283] According to the above technical solution, the DMRS sequence generated by the sending end based on the Pi / 2-BPSK symbol sequence can ensure that the PAPR of the DMRS symbol is not higher than the PAPR of the data symbol in the case where the DMRS sequence and the first data signal adopt frequency division multiplexing.

[0284] Optionally, in a possible implementation, the reference signal further includes a first signal occupying the first reserved subcarriers, and the second data signal further includes a second signal occupying the second reserved subcarriers. In addition, the number of the first reserved subcarriers is greater than the number of the second reserved subcarriers.

[0285] Optionally, in a possible implementation, the number of the second reserved subcarriers is 0, and the number of the first reserved subcarriers is a positive integer greater than 0. That is, only the first signal is carried in the reference signal, and the second signal is not carried in the second data signal.

[0286] It should be noted that, in the embodiments of the present application, the first signal is the signal #1 described above, and the second signal is the signal #2 described above.

[0287] It should be understood that, in the embodiments of the present application, the first signal and the second signal can be different signals, that is, the signal #1 and the signal #2 described above can also be different signals.

[0288] It should be further noted that the first signal and the second signal can be reserved signals or redundant signals, and the present application does not limit this. The related description of the redundant signals and the reserved signals can be referred to the description above. It should be understood that the present application does not limit the names of the first signal and the second signal, for example, the first signal can also be referred to as a first reserved signal, and the second signal can also be referred to as a second reserved signal.

[0289] Optionally, in a possible implementation, the bandwidths occupied by the reference signal and the second data signal described above are different, for example, the reference signal occupies a 50-megahertz bandwidth, and the second data signal occupies a 100-megahertz bandwidth. It should be understood that the above is only an example, and the present application does not limit this.

[0290] Optionally, in a possible implementation, the first bandwidth expansion coefficient is greater than or equal to the second bandwidth expansion coefficient.

[0291] The first bandwidth expansion coefficient is a ratio of the bandwidth occupied by the first signal to the bandwidth occupied by the reference signal, and the second bandwidth expansion coefficient is a ratio of the bandwidth occupied by the second signal to the bandwidth occupied by the second data signal. It should be understood that the bandwidth expansion coefficient can also be understood as a sequence expansion factor or a sequence expansion coefficient or a spectrum expansion coefficient, which is not limited here.

[0292] Further, in the embodiments of the present application, the first reserved subcarriers, the first data signal and the DMRS sequence are located in different subcarriers. That is to say, the first signal, the first data signal and the DMRS sequence are located in different frequency domain resources. Moreover, the frequency domain resources occupied by the second reserved subcarriers and the frequency domain resources occupied by the frequency domain signal #1 are also different. The frequency domain positions of the first reserved subcarriers and the second reserved subcarriers can be referred to the diagram 7 shown below.

[0293] Fig. 7 is a diagram of the frequency domain positions of the first reserved subcarriers and the second reserved subcarriers provided by the embodiments of the present application. It is worth noting that the embodiments of the present application limit the number of the first reserved subcarriers to be greater than the number of the second reserved subcarriers. That is to say, the examples shown in Fig. 7 are all corresponding to the case that the number of the first reserved subcarriers is greater than the number of the second reserved subcarriers.

[0294] For example, in a possible implementation, the first reserved subcarriers are located at one side of the frequency domain resources occupied by the reference signal, and the second reserved subcarriers are located at one side of the frequency domain resources occupied by the second data signal. As shown in Fig. 7(a), the first signal occupies the first reserved subcarriers, and the first signal is located at one side of the frequency domain resources occupied by the reference signal, and the second signal occupies the second reserved subcarriers, and the second signal is located at one side of the frequency domain resources occupied by the second data signal.

[0295] It should be noted that Fig. 7(a) illustrates the case that the first signal and the second signal are located at the same side, that is to say, Fig. 7(a) illustrates the case that the first reserved subcarriers and the second reserved subcarriers are located at the same side. For example, the first signal occupies subcarriers 9-11, and the second signal occupies subcarriers 10-11. Alternatively, in a possible case, the first signal and the second signal can also be located at different sides, that is to say, the first reserved subcarriers and the second reserved subcarriers can also be located at different sides. For example, the first signal occupies subcarriers 9-11, and the second signal occupies subcarriers 0-1. Alternatively, in another possible case, the first signal can occupy subcarriers 0-2, and the second signal can occupy subcarriers 10-11. It should be understood that the above are only illustrative examples, and the present application is not limited thereto.

[0296] For example, in a possible implementation, the first reserved subcarriers are located at both sides of the frequency domain resources occupied by the reference signal, and the second reserved subcarriers are located at both sides of the frequency domain resources occupied by the second data signal. As shown in Fig. 7(b), the first signal occupies the first reserved subcarriers, and the first signal is located at both sides of the frequency domain resources occupied by the reference signal, and the second signal occupies the second reserved subcarriers, and the second signal is located at both sides of the frequency domain resources occupied by the second data signal.

[0297] It should be noted that the (b) of FIG. 7 illustrates the case that the first signal and the second signal are located at both sides, that is, the (b) of FIG. 7 illustrates the case that the first reserved subcarriers and the second reserved subcarriers are located at both sides. For example, the first signal occupies subcarriers 0-1 and 10-11, and the second signal occupies subcarriers 0 and 11. Alternatively, in a possible case, the first signal and the second signal are not located at both sides, that is, the first reserved subcarriers and the second reserved subcarriers are not located at both sides. For example, the first signal occupies subcarriers 0-1 and 10-11, and the second signal occupies 0-1 or 10-11. Alternatively, in another possible case, the first signal can occupy subcarriers 0-3, and the second signal can occupy subcarriers 0 and 11.

[0298] It should be further noted that the (b) of FIG. 7 illustrates the case that the first signal is uniformly located at both sides of the frequency domain resource occupied by the reference signal, and the second signal is uniformly located at both sides of the frequency domain resource occupied by the second data signal. Alternatively, in a possible case, the first signal can occupy subcarriers 0-2 and 11.

[0299] It should be understood that the above is only an example, and the present application is not limited in this regard.

[0300] For example, in a possible implementation, the first reserved subcarriers are uniformly placed on the frequency domain resource occupied by the reference signal, that is, the first signal is uniformly placed on the frequency domain resource occupied by the reference signal. As shown in (c) of FIG. 7, the first signal occupies subcarriers 1, 5, and 9. Alternatively, in a case, the second reserved subcarriers are not necessarily uniformly placed on the frequency domain resource occupied by the second data signal, for example, the second signal occupies subcarriers 0 and 1.

[0301] For example, in a possible implementation, the second reserved subcarriers are uniformly placed on the frequency domain resource occupied by the second data signal, that is, the second signal is uniformly placed on the frequency domain resource occupied by the second data signal. As shown in (d) of FIG. 7, the second signal occupies subcarriers 3, 7, and 11. Alternatively, in a case, the first reserved subcarriers are not necessarily uniformly placed on the frequency domain resource occupied by the reference signal, for example, the first signal occupies subcarriers 8-11.

[0302] For example, in a possible implementation, the first reserved subcarriers are uniformly placed on the frequency domain resource occupied by the reference signal, and the second reserved subcarriers are uniformly placed on the frequency domain resource occupied by the second data signal. That is, the first signal is uniformly placed on the frequency domain resource occupied by the reference signal, and the second signal is uniformly placed on the frequency domain resource occupied by the second data signal. For example, as shown in (e) of FIG. 7, the first signal occupies subcarriers 1, 5, and 9, and the second signal occupies subcarriers 5 and 11.

[0303] It should be understood that the above is only an example, and the present application is not limited thereto.

[0304] In the embodiments of the present application, the first reserved subcarriers carry the first signal, which functions to reduce the PAPR of the reference signal, and the second subcarriers carry the second signal, which functions to reduce the PAPR of the second data signal. Since the number of the first reserved subcarriers is greater than the number of the second reserved subcarriers, that is, compared with the second data signal, the reference signal has more reserved subcarriers, so that the PAPR of the reference signal is reduced more greatly. Therefore, based on the above technical solution, it can be ensured that the PAPR of the DMRS symbol is not higher than the PAPR of the data symbol in the frequency division multiplexing manner of the DMRS sequence and the first data signal.

[0305] Optionally, in a possible implementation, before step S530, the method can further include: performing FDSS processing on the reference signal and the second data signal.

[0306] Specifically, in a possible implementation, the window function used for performing FDSS processing on the reference signal is different from the window function used for performing FDSS processing on the second data signal. It should be understood that, in one case, the window functions being different can be understood as the types of the window functions being different, or, in another case, the window functions being different can also be understood as the types of the window functions being the same but the parameters being different. The present application is not limited thereto.

[0307] For example, in a possible implementation, the type of the window function used for performing FDSS processing on the reference signal is different from the type of the window function used for performing FDSS processing on the second data signal, for example, the window function used for performing FDSS processing on the reference signal is a Hamming window, and the window function used for performing FDSS processing on the second data signal is a Kaiser window. It should be noted that, in the technical solution of the present application, it is assumed that the window function used for performing FDSS processing on the reference signal is window function 1, and the window function used for performing FDSS processing on the second data signal is window function 2, at this time, the window function 1 and the window function 2 are selected to make the PAPR of the DMRS symbol not higher than the PAPR of the data symbol in the frequency division multiplexing manner of the DMRS sequence and the first data signal.

[0308] For example, in another possible implementation, the window function used for FDSS processing of the reference signal and the window function used for FDSS processing of the second data signal are of the same type but have different parameters, where the parameters can be the corresponding time-domain impulse responses of the window functions. For example, the window function used for FDSS processing of the reference signal has a corresponding time-domain impulse response of [0.335 1 0.335], and the window function used for FDSS processing of the second data signal has a corresponding time-domain impulse response of [0.28 1 0.28]. It should be understood that the above parameters are merely examples, and the present application is not limited thereto.

[0309] Optionally, in a possible implementation, the roll-off coefficient of the window function used for FDSS processing of the reference signal is greater than the roll-off coefficient of the window function used for FDSS processing of the second data signal.

[0310] Specifically, the window function used for FDSS processing of the reference signal and the window function used for FDSS processing of the second data signal can include any of the following: a Nyquist window (such as a raised cosine window), a truncated Nyquist window (such as a truncated raised cosine window), a root Nyquist window (such as a root raised cosine window), and a truncated root Nyquist window (such as a truncated root raised cosine window). In the embodiments of the present application, the roll-off coefficient of the window function used for FDSS processing of the reference signal is greater than the roll-off coefficient of the window function used for FDSS processing of the second data signal. It should be understood that the above window functions are merely examples, and the present application is not limited thereto.

[0311] The expression of the window function being a Nyquist window is as shown in the following formula (5). γ0=g -1 (0.5) Formula (7)

[0312] where β is the roll-off coefficient, 2B(1+β) represents the transmission bandwidth, T=1 / (2B), and f represents the frequency. -1 g(f) is the inverse function of g(f), n is a design parameter, and f represents the frequency. It should be noted that g in the above formula can be sealed or unsealed, and the present application is not limited thereto.

[0313] For example, if the Nyquist window is a raised cosine window, as shown in the following formula (8), then

[0314] where β is the roll-off coefficient, 2B(1+β) represents the transmission bandwidth, T=1 / (2B), and f represents the frequency.

[0315] The window function can also be based on a design known as a root Nyquist window. For example, if S(f) is a raised cosine, then is known as a root-raised cosine.

[0316] For example, in one possible implementation, when the window function used for FDSS processing of the reference signal and the window function used for FDSS processing of the second data signal are of the same type, for example, the window function is a Nyquist window, the roll-off factor of the Nyquist window used for FDSS processing of the reference signal is greater than the roll-off factor of the Nyquist window used for FDSS processing of the second data signal.

[0317] It should be noted that the above examples are only illustrative, and the present application is not limited in this regard.

[0318] According to the above technical solution, by constraining the roll-off factor of the window function used for FDSS processing of the reference signal to be greater than the roll-off factor of the window function used for FDSS processing of the second data signal, it is possible to ensure that the PAPR of the DMRS symbol is not higher than the PAPR of the data symbol in the frequency division multiplexing manner of the DMRS sequence and the first data signal.

[0319] FIG. 8 is a schematic flowchart of a communication method 800 according to another embodiment of the present application. As shown in FIG. 8, the method includes the following steps.

[0320] S810, the sending end generates a reference signal.

[0321] Specifically, the reference signal can include a first data signal and a DMRS sequence, wherein since the first data signal and the DMRS sequence are obtained in a frequency division multiplexing manner, the first data signal and the DMRS sequence are located in different frequency domain resources, or in other words, the first data signal and the DMRS sequence are located in the reference signal in a frequency division multiplexing manner. The specific process of the sending end obtaining the reference signal in a frequency division multiplexing manner can be referred to as described above, and will not be described here.

[0322] In addition, in the embodiment of the present application, the first data signal and the DMRS sequence occupy the same time domain resource, for example, the first data signal and the DMRS sequence occupy the same symbol. It can be understood that the DMRS sequence can carry the first data signal.

[0323] S820, the sending end sends the reference signal and the second data signal to the receiving end, and correspondingly, the receiving end receives the reference signal and the second data signal. Wherein, the reference signal and the second data signal are located in different time domain resources, for example, the reference signal and the second data signal are located in different symbols.

[0324] Optionally, before step S810 and S820, the method can further comprise: S801, modulating the first bit stream based on a modulation scheme #1 to obtain the first data signal; and S802, modulating the second bit stream based on a modulation scheme #2 to obtain the second data signal. It can be understood that the modulation scheme #1 is a modulation scheme corresponding to the first data signal, and the modulation scheme #2 is a modulation scheme corresponding to the second data signal.

[0325] It should be noted that the modulation scheme #1 can correspond to the first modulation scheme described above, and the modulation scheme #2 can correspond to the second modulation scheme described above. For the related description of the modulation scheme #1 and the modulation scheme #2, reference can be made to the related description of the first modulation scheme and the second modulation scheme described above, which will not be repeated here. Based on this, step S801 and step S802 are similar to step S510 and step S520, and for the sake of simplicity, they will not be repeated here.

[0326] Optionally, in a possible implementation, whether the first data signal and the DMRS sequence are located in the reference signal in a frequency division multiplexing manner is related to the order of the modulation scheme corresponding to the second data signal.

[0327] For example, in one case, when the order of the modulation scheme corresponding to the second data signal is greater than or equal to a second threshold, the first data signal and the DMRS sequence are located in the reference signal in a frequency division multiplexing manner. For example, in another case, when the order of the modulation scheme corresponding to the second data signal is less than the second threshold, the reference signal described above can also not carry the first data signal, that is, the reference signal described above only includes the DMRS sequence and does not include the first data signal.

[0328] It should be noted that in one possible case, the second threshold described above can be indicated by the network side to the sending end, for example, the network side sends an indication information #1 to the terminal device, and the indication information #1 indicates the second threshold. Alternatively, in another possible case, the second threshold described above can also be pre-defined by a protocol. For example, the second threshold is pre-set by the protocol, and the sending end compares the order of the modulation scheme corresponding to the second data signal with the second threshold to further determine whether the reference signal carries the first data signal.

[0329] It should be understood that the present application does not limit the value of the second threshold. For example, the second threshold can be 1, or the second threshold can be 2.

[0330] Optionally, in another possible implementation, whether the first data signal and the DMRS sequence are located in the reference signal in a frequency division multiplexing manner can also be specifically indicated by the network side to the sending end.

[0331] Exemplarily, in one case, the network side can send the sending end the indication information #2 indicating that the reference signal does not carry the first data signal, or in other words, the indication information #2 indicates that the reference signal only includes the DMRS sequence.

[0332] Exemplarily, in another case, the network side can also send the sending end the indication information #3 indicating that the reference signal carries the DMRS sequence, or in other words, the indication information #3 indicates that the reference signal includes the first data signal and the DMRS sequence.

[0333] It should be noted that the modulation scheme corresponding to the first data signal and the modulation scheme corresponding to the second data signal can be any one of the following: 16-QAM modulation, 64-QAM modulation, 16-PSK modulation, and QPSK modulation. It should be understood that the above is only illustrative, and the present application does not limit this.

[0334] It should also be noted that in step S801 and step S802, in one possible case, the order of the modulation scheme corresponding to the first data signal and the order of the modulation scheme corresponding to the second data signal can be the same. In another possible case, the order of the modulation scheme corresponding to the first data signal and the order of the modulation scheme corresponding to the second data signal can also be different. That is, the order of the modulation scheme corresponding to the first data signal can be higher than the order of the modulation scheme corresponding to the second data signal, or the order of the modulation scheme corresponding to the first data signal can also be lower than the order of the modulation scheme corresponding to the second data signal. It should be understood that the present application does not limit this.

[0335] It should also be noted that in the case where the order of the modulation scheme corresponding to the first data signal is lower than the order of the modulation scheme corresponding to the second data signal, optionally, in one possible implementation, the EPRE of the first data signal is lower than the EPRE of the DMRS sequence. Or in other words, the ratio of the EPRE of the first data signal to the EPRE of the DMRS sequence is less than 1. It should be noted that the related description of the EPRE of the first data signal being lower than the EPRE of the DMRS sequence can be referred to the foregoing description, which will not be repeated here.

[0336] Further, in the embodiment of the present application, in one possible implementation, the DMRS sequence can be generated based on a ZC sequence. Or in another possible implementation, the DMRS sequence can be generated based on a Pi / 2-BPSK symbol sequence.

[0337] For example, in the case that the DMRS sequence is generated based on a ZC sequence, the root of the ZC sequence is one of a first root set, where the first root set is related to the length of the DMRS sequence. It should be noted that the specific description about the DMRS sequence can be generated based on the ZC sequence can refer to the foregoing description, which will not be described here.

[0338] For example, in the case that the DMRS sequence can be generated based on a Pi / 2-BPSK symbol sequence, specifically, the Gold sequence or the Golay complementary pair sequence can be first modulated by Pi / 2-BPSK, and then DFT is performed to obtain the DMRS sequence.

[0339] It should be noted that in a possible case, whether the DMRS sequence described in the foregoing is generated based on the Pi / 2-BPSK symbol sequence is also related to the modulation order of the modulation scheme corresponding to the second data signal, for example, in the case that the order of the modulation scheme corresponding to the second data signal is greater than or equal to a first threshold, the DMRS sequence can be generated based on the Pi / 2-BPSK symbol sequence.

[0340] It should be noted that the first threshold can be preconfigured, and it should be understood that the present application does not limit the integral of the first threshold, for example, the value of the first threshold can be 2, or the value of the first threshold can be 4.

[0341] Optionally, in a possible implementation, the reference signal described in the foregoing further includes a first signal, the first signal occupies a first reserved subcarrier, and the second data signal further includes a second signal, the second signal occupies a second reserved subcarrier. And the number of the first reserved subcarriers is greater than the number of the second reserved subcarriers.

[0342] It should be noted that the related description of the first reserved subcarrier, the first signal and the DMRS sequence, and the related description of the second reserved subcarrier, the second signal and the second data signal can refer to the foregoing description, and for the sake of simplicity, will not be described here.

[0343] Optionally, in a possible implementation, the bandwidths occupied by the reference signal and the second data signal are different, for example, the reference signal occupies a 50-megahertz bandwidth, and the second data signal occupies a 100-megahertz bandwidth. It should be understood that the above is only an example, and the present application does not limit this.

[0344] Optionally, in a possible implementation, in the embodiment of the present application, the first bandwidth expansion coefficient is greater than or equal to the second bandwidth expansion coefficient, and the related description of the first bandwidth expansion coefficient and the second bandwidth expansion coefficient can refer to the foregoing description, which will not be described here.

[0345] Optionally, in a possible implementation, before step S820, the method further includes: S830, performing FDSS processing on the reference signal and the second data signal. It should be noted that step S830 is similar to the related step of performing FDSS processing on the reference signal and the second data signal before step S530 described above, and details are not described herein for simplicity.

[0346] According to the technical solution described above, the PAPR of the DMRS symbol can be ensured to be not higher than the PAPR of the data symbol in the frequency division multiplexing manner of the DMRS sequence and the first data signal.

[0347] FIG. 9 is a schematic flowchart of a communication method 900 according to another embodiment of the present application. As shown in FIG. 9, the method can include the following steps.

[0348] S910, the sending end generates a reference signal.

[0349] It should be noted that step S910 is similar to step S810, and details are not described herein for simplicity.

[0350] S920, the sending end sends the reference signal and the second data signal to the receiving end, and correspondingly, the receiving end receives the reference signal and the second data signal.

[0351] Specifically, the reference signal and the second data signal are located in different time domain resources, for example, the reference signal and the second data signal are located in different symbols.

[0352] Optionally, before steps S910 and S920, the method further includes: S901, the sending end modulates the first bit stream based on a modulation scheme #1 to obtain the first data signal; and S902, the sending end modulates the second bit stream based on a modulation scheme #2 to obtain the second data signal. It can be understood that the modulation scheme #1 is a modulation scheme corresponding to the first data signal, and the modulation scheme #2 is a modulation scheme corresponding to the second data signal.

[0353] It should be noted that S901 and step S902 are similar to step S801 and step S802, and details are not described herein for simplicity.

[0354] Further, in the embodiments of the present application, the reference signal described above further includes a first signal occupying first reserved subcarriers, and the second data signal further includes a second signal occupying second reserved subcarriers. Moreover, the number of the first reserved subcarriers is greater than the number of the second reserved subcarriers.

[0355] It should be noted that the related descriptions of the first reserved subcarrier, the first signal and the DMRS sequence, and the related descriptions of the second reserved subcarrier, the second signal and the second data signal can refer to the foregoing descriptions, and will not be described here for the sake of simplicity.

[0356] Optionally, in a possible implementation, the bandwidths occupied by the reference signal and the second data signal are different, for example, the reference signal occupies a 50-megahertz bandwidth, and the second data signal occupies a 100-megahertz bandwidth. It should be understood that the foregoing is merely illustrative, and the present application is not limited in this regard.

[0357] Optionally, in a possible implementation, in the embodiment of the present application, the first bandwidth expansion coefficient is greater than or equal to the second bandwidth expansion coefficient, and the related descriptions of the first bandwidth expansion coefficient and the second bandwidth expansion coefficient can refer to the foregoing descriptions, and will not be described here for the sake of simplicity.

[0358] Optionally, in a possible implementation, before step S920, the method can comprise: S930, performing FDSS processing on the reference signal and the second data signal. It should be noted that step S930 is similar to the related descriptions of the step of performing FDSS processing on the reference signal and the second data signal before step S530 described above, and will not be described here for the sake of simplicity.

[0359] Optionally, in a possible implementation, the DMRS sequence described above can be generated based on a ZC sequence. For example, in the case where the DMRS sequence is generated based on a ZC sequence, the root of the ZC sequence is one of a first root set, wherein the first root set is related to the length of the DMRS sequence. It should be noted that the specific descriptions of the DMRS sequence that can be generated based on a ZC sequence can refer to the foregoing descriptions, and will not be described here for the sake of simplicity.

[0360] Optionally, in a possible implementation, the DMRS sequence described above can be generated based on a Pi / 2-BPSK symbol sequence. Specifically, the Gold sequence or the Golay complementary pair sequence can be first modulated by Pi / 2-BPSK, and then DFT is performed to finally obtain the DMRS sequence. It should be noted that the related descriptions of the DMRS sequence that can be generated based on a Pi / 2-BPSK symbol sequence can refer to the foregoing descriptions, and will not be described here for the sake of simplicity.

[0361] It should be noted that the modulation scheme corresponding to the first data signal and the modulation scheme corresponding to the second data signal described above can be any one of the following: 16-QAM modulation, 64-QAM modulation, 16-PSK modulation and QPSK modulation. It should be understood that the foregoing is merely illustrative, and the present application is not limited in this regard.

[0362] It should be noted that, in the case that the order of the modulation scheme corresponding to the first data signal is lower than the order of the modulation scheme corresponding to the second data signal, optionally, in a possible implementation, the EPRE of the first data signal is lower than the EPRE of the DMRS sequence. In other words, the ratio of the EPRE of the first data signal to the EPRE of the DMRS sequence is less than 1. It should be noted that the description about the EPRE of the first data signal being lower than the EPRE of the DMRS sequence can refer to the foregoing description, which will not be repeated here.

[0363] According to the above technical solution, in the case that the DMRS sequence and the first data signal adopt frequency division multiplexing, the PAPR of the DMRS symbol can be ensured to be not higher than the PAPR of the data symbol.

[0364] It should be understood that some optional features in the embodiments of the present application can not depend on other features in some scenarios, or can be combined with other features in some scenarios, without limitation.

[0365] It should also be understood that the solutions in the embodiments of the present application can be reasonably combined, or the solutions in the embodiments of the present application can be reasonably decoupled, and the explanation or description of each term appearing in the embodiments can be mutually referenced or explained in each embodiment, without limitation.

[0366] It should also be understood that the size of various numerical serial numbers in the embodiments of the present application does not mean the order of execution, but is only a distinction for convenience of description, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0367] It should also be understood that some terms in the embodiments of the present application, such as the first modulation scheme, the second modulation scheme, etc., should be understood that the naming does not limit the protection scope of the embodiments of the present application.

[0368] It should also be understood that in the above various method embodiments, the methods and operations implemented by the sending end can also be implemented by the constituent components (such as chips or circuits) of the sending end, and the methods and operations implemented by the receiving end can also be implemented by the constituent components (such as chips or circuits) of the receiving end, without limitation. Corresponding to the methods given in the above various method embodiments, the embodiments of the present application also provide corresponding communication devices, and the device includes a module for executing the corresponding modules of the above various method embodiments. The module can be software, hardware, or a combination of software and hardware. It can be understood that the technical features described in the above various method embodiments are also applicable to the following device embodiments.

[0369] It should be understood that the sending end and the receiving end can perform part or all of the steps in the above-described embodiments, and these steps or operations are only examples, and the embodiments of the present application can also perform other operations or variations of various operations. In addition, various steps can be performed in different orders from those presented in the above-described embodiments, and it is possible that not all operations in the above-described embodiments are performed.

[0370] The communication method provided by the embodiments of the present application is described in detail above in combination with FIG. 5-FIG. 9, and the communication apparatus provided by the embodiments of the present application is described in detail below in combination with FIG. 10-FIG. 12. It should be understood that the description of the apparatus embodiments corresponds to the description of the method embodiments, therefore, the content not described in detail can be referred to the above method embodiments, and part of the content is not described again for brevity.

[0371] FIG. 10 is a schematic block diagram of a communication apparatus 1000 provided by the embodiments of the present application. As shown in FIG. 10, the communication apparatus 1000 includes a transceiver unit 1010. The transceiver unit 1010 can implement corresponding communication functions, and the transceiver unit 1010 can also be referred to as a communication interface or a communication unit. Optionally, the communication apparatus 1000 further includes a processing unit 1020 for data processing. The communication apparatus 1000 is configured to implement the functions of the sending end and the receiving end in the above-described method embodiments shown in FIG. 5 to FIG. 9.

[0372] When the communication apparatus 1000 is configured to implement the functions of the sending end in the method embodiment shown in FIG. 5, the processing unit 1020 is configured to modulate the first bit stream based on the first modulation scheme to obtain the first data signal, and modulate the second bit stream based on the second modulation scheme to obtain the second data signal. The transceiver unit 1010 is configured to send the reference signal and the second data signal.

[0373] Optionally, the processing unit 1020 is further configured to perform frequency domain spectral shaping (FDSS) processing on the reference signal and the second data signal.

[0374] When the communication apparatus 1000 is configured to implement the functions of the receiving end in the method embodiment shown in FIG. 5, the transceiver unit 1010 is configured to receive the reference signal and the second data signal.

[0375] When the communication apparatus 1000 is configured to implement the functions of the sending end in the method embodiment shown in FIG. 8, the processing unit 1020 is configured to generate the reference signal. The transceiver unit 1010 is configured to send the reference signal and the second data signal.

[0376] Optionally, the processing unit 1020 is further configured to modulate the first bit stream based on the first modulation scheme to obtain the first data signal, and modulate the second bit stream based on the second modulation scheme to obtain the second data signal.

[0377] Optionally, the processing unit 1020 is further configured to perform FDSS processing on the reference signal and the second data signal.

[0378] When the communication apparatus 1000 is configured to implement the function of the receiving end in the method embodiment shown in FIG. 8, the transceiver unit 1010 is configured to receive the reference signal and the second data signal.

[0379] When the communication apparatus 1000 is configured to implement the function of the transmitting end in the method embodiment shown in FIG. 9, the processing unit 1020 is configured to generate the reference signal. The transceiver unit 1010 is configured to transmit the reference signal and the second data signal.

[0380] Optionally, the processing unit 1020 is further configured to modulate the first bit stream based on a first modulation scheme to obtain the first data signal, and modulate the second bit stream based on a second modulation scheme to obtain the second data signal.

[0381] Optionally, the processing unit 1020 is further configured to perform FDSS processing on the reference signal and the second data signal.

[0382] When the communication apparatus 1000 is configured to implement the function of the receiving end in the method embodiment shown in FIG. 9, the transceiver unit 1010 is configured to receive the reference signal and the second data signal.

[0383] For more detailed description of the transceiver unit 1010 and the processing unit 1020, and the meanings of the terms such as the first data signal and the first modulation scheme, please refer to the description in the method embodiments shown in FIGS. 5-9.

[0384] It should also be understood that the apparatus 1000 herein is embodied in the form of functional units. The term “unit” herein can refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (for example, a shared processor, a dedicated processor, or a group processor, etc.) and a memory for executing one or more software or firmware programs, a combination logic circuit, and / or other suitable components that support the described functions. In an optional example, those skilled in the art can understand that the apparatus 1000 can be embodied as the transmitting end and the receiving end in the above-described embodiments, and can be configured to execute the processes and / or steps corresponding to the transmitting end and the receiving end in the above-described method embodiments. Alternatively, the apparatus 1000 can be embodied as the transmitting end and the receiving end in the above-described embodiments, and can be configured to execute the processes and / or steps corresponding to the transmitting end and the receiving end in the above-described method embodiments. To avoid repetition, details are not described herein.

[0385] The apparatus 1000 of each of the above-mentioned solutions has a function of implementing the corresponding steps performed by the sending end and the receiving end in the above-mentioned methods, or the apparatus 1000 of each of the above-mentioned solutions has a function of implementing the corresponding steps performed by the sending end and the receiving end in the above-mentioned methods. The function can be implemented by hardware or by execution of corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-mentioned functions; for example, the transceiver unit can be replaced by a transceiver (for example, the sending unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiver), and other units such as the processing unit can be replaced by a processor, which respectively performs the transceiving operation and the related processing operation in each method embodiment.

[0386] In addition, the transceiver unit 1010 can also be a transceiver circuit (for example, can include a receiving circuit and a sending circuit), and the processing unit 1020 can be a processing circuit.

[0387] It should be noted that the apparatus in FIG. 10 can be a network element or a device in the foregoing embodiments, or can be a chip or a chip system, for example, a system on chip (SoC). The transceiver unit can be an input / output circuit or a communication interface, and the processing unit can be a processor or a microprocessor integrated on the chip or an integrated circuit. In this regard, no limitation is made.

[0388] As shown in FIG. 11, an embodiment of the present application provides another communication apparatus 1100. The apparatus 1100 includes a processor 1110 and a memory 1120 coupled to the processor 1110, the memory 1120 being configured to store computer programs or instructions and / or data, and the processor 1110 being configured to execute the computer programs or instructions stored in the memory 1120 or read the data stored in the memory 1120 to perform the methods in the above method embodiments.

[0389] When the communication apparatus 1100 is used to implement the methods shown in FIGS. 5 to 9, the processor 1110 is configured to implement the functions of the above-mentioned processing unit 1020.

[0390] Optionally, the processor 1110 is one or more.

[0391] Optionally, the memory 1120 is one or more.

[0392] Optionally, the memory 1120 is integrated with the processor 1110 or is separately arranged.

[0393] Optionally, as shown in FIG. 11, the apparatus 1100 further includes a transceiver 1130 configured to receive and / or send signals. For example, the processor 1110 is configured to control the transceiver 1130 to receive and / or send signals.

[0394] When the communication apparatus 1100 is used to implement the methods shown in FIGS. 5-9, the transceiver 1130 is configured to implement the functions of the transceiver unit 1010 described above.

[0395] For example, the processor 1110 is configured to execute computer programs or instructions stored in the memory 1120 to implement the relevant operations of the sending end and the receiving end in each of the method embodiments above. For example, the method of the sending end in any one of the embodiments shown in FIGS. 5-9, or the method of the receiving end in any one of the embodiments shown in FIGS. 5-9.

[0396] It should be understood that the processor mentioned in the embodiments of the present application can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0397] It should also be understood that the memory referred to in the embodiments of the present application can be a volatile memory and / or a non-volatile memory. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically EPROM (EEPROM) or a flash memory. The volatile memory can be a random access memory (RAM). For example, the RAM can be used as an external cache. As an example but not limitation, the RAM includes the following various forms: static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM) and direct rambus RAM (DR RAM).

[0398] It should be noted that when the processor is a general processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) can be integrated in the processor.

[0399] It should also be noted that the memory described herein is intended to include, but not limited to, these and any other suitable types of memory.

[0400] As shown in FIG. 12, the chip system 1200 provided by the embodiments of the present application. The chip system 1200 (or also can be called processing system) includes a logic circuit 1210 and an input / output interface 1220. It should be understood that the chip system 1200 can be installed in the communication device 1100 described above, or in other words, the communication device 1100 described above can also include the chip system 1200.

[0401] The logic circuit 1210 can be a processing circuit in the chip system 1200. The logic circuit 1210 can be coupled to a storage unit, and invoke instructions in the storage unit, so that the chip system 1200 can implement the methods and functions of the embodiments of the present application. The input / output interface 1220 can be an input / output circuit in the chip system 1200, and output information processed by the chip system 1200, or input data or signaling information to be processed by the chip system 1200.

[0402] As an option, the chip system 1200 is configured to implement the operations performed by the sending end and the receiving end in the above method embodiments.

[0403] For example, the logic circuit 1210 is configured to implement the processing-related operations of the sending end and the receiving end in the above method embodiments, such as the processing-related operations of the sending end and the receiving end in any one of the embodiments shown in FIGS. 5 to 9, that is, the logic circuit 1210 is configured to implement the functions of the processing unit 1020; the input / output interface 1220 is configured to implement the sending and / or receiving-related operations of the sending end and the receiving end in the above method embodiments, such as the sending and / or receiving-related operations performed by the sending end and the receiving end in any one of the embodiments shown in FIGS. 5 to 9, that is, the input / output interface 1220 is configured to implement the functions of the transceiver unit 1010.

[0404] The embodiments of the present application also provide a computer readable storage medium, which stores computer instructions for implementing the methods performed by the sending end and the receiving end in the above method embodiments.

[0405] For example, the computer program is executed by a computer, so that the computer can implement the methods performed by the sending end and the receiving end in the above method embodiments.

[0406] The embodiments of the present application also provide a computer program product, which contains instructions, and the instructions are executed by a computer to implement the methods performed by the sending end and the receiving end in the above method embodiments.

[0407] The explanations and beneficial effects of the related contents in any of the above-provided apparatuses can refer to the corresponding method embodiments provided above, and will not be repeated here.

[0408] In several embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented by other manners. For example, the apparatus embodiments described above are only illustrative, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units or components shown or discussed can be indirect coupling or communication connection through some interfaces, apparatuses or units, and can be electrical, mechanical or other forms.

[0409] Those skilled in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software manner depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0410] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, apparatus and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0411] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place or distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0412] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit.

[0413] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the parts that contribute to the prior art or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0414] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A communication method characterized by comprising: The method comprises: modulating a first bit stream based on a first modulation scheme to obtain a first data signal; modulating a second bit stream based on a second modulation scheme to obtain a second data signal; sending a reference signal and the second data signal, the reference signal comprising the first data signal and a demodulation reference signal (DMRS) sequence, the first data signal and the DMRS sequence being located in different frequency domain resources, the reference signal and the second data signal being located in different time domain resources; wherein an order of the first modulation scheme is lower than an order of the second modulation scheme.

2. The method of claim 1, wherein, The DMRS sequence is generated based on a Zadoff-Chu (ZC) sequence, and a root of the ZC sequence is one of a first root set.

3. The method of claim 2, wherein, The first root set is related to a length of the ZC sequence.

4. The method of claim 1, wherein, The DMRS sequence is generated based on a Pi / 2-binary phase shift keying (Pi / 2-BPSK) symbol sequence.

5. The method of claim 4, wherein, The DMRS sequence is generated based on a Pi / 2-BPSK symbol sequence, comprising: in a case where the order of the second modulation scheme is greater than or equal to a first threshold, the DMRS sequence is generated based on the Pi / 2-BPSK symbol sequence.

6. The method according to any one of claims 1 to 5, characterized in that, The reference signal further comprises a first signal occupying a first reserved subcarrier, and the second data signal further comprises a second signal occupying a second reserved subcarrier, a number of the first reserved subcarriers being greater than a number of the second reserved subcarriers.

7. The method of claim 6, wherein, The first reserved subcarriers and the DMRS sequence are located in different subcarriers, wherein the first reserved subcarriers are located at one side or both sides of a frequency domain resource occupied by the reference signal; and / or the first reserved subcarriers are uniformly placed on the frequency domain resource occupied by the reference signal.

8. The method of claim 6 or 7, wherein the second reserved subcarriers are located at one side or both sides of a frequency domain resource occupied by the second data signal; and / or the second reserved subcarriers are uniformly placed on the frequency domain resource occupied by the second data signal.

9. The method according to any one of claims 1 to 8, characterized in that, Before the sending of the reference signal and the second data signal, the method further comprises: performing frequency domain spectral shaping (FDSS) processing on the reference signal and the second data signal.

10. The method of claim 9, wherein, The FDSS processing on the reference signal and the second data signal comprises: a filter used for the FDSS processing on the reference signal is different from a filter used for the FDSS processing on the second data signal.

11. The method of claim 9, wherein, The FDSS processing on the reference signal and the second data signal comprises: a roll-off coefficient of a window function used for the FDSS processing on the reference signal is greater than a roll-off coefficient of a window function used for the FDSS processing on the second data signal.

12. The method of any of claims 1 to 11, wherein an energy per resource element (EPRE) of the first data signal is lower than an EPRE of the DMRS sequence.

13. A communication method characterized by comprising: The method comprises: receive a reference signal and a second data signal, the reference signal comprising a first data signal and a DMRS sequence, the first data signal and the DMRS sequence being located in different frequency domain resources, the reference signal and the second data signal being located in different time domain resources; wherein the first data signal is obtained by modulating a first bit stream based on a first modulation scheme, and the second data signal is obtained by modulating a second bit stream based on a second modulation scheme, an order of the first modulation scheme being lower than an order of the second modulation scheme.

14. The method of claim 13, wherein, the DMRS sequence is generated based on a ZC sequence, and a root of the ZC sequence is one of a first root set.

15. The method of claim 14, wherein, the first root set is related to a length of the ZC sequence.

16. The method of claim 13, wherein, the DMRS sequence is generated based on a Pi / 2-BPSK symbol sequence.

17. The method of claim 16, wherein, the DMRS sequence is generated based on a Pi / 2-BPSK symbol sequence, comprising: in a case where the order of the second modulation scheme is greater than or equal to a first threshold, the DMRS sequence is generated based on a Pi / 2-BPSK symbol sequence.

18. The method according to any one of claims 13 to 17, characterized in that, the reference signal further comprises a first signal, the first signal occupying a first reserved subcarrier, the second data signal further comprises a second signal, the second signal occupying a second reserved subcarrier, a number of the first reserved subcarriers being greater than a number of the second reserved subcarriers.

19. The method of claim 18, wherein, the first reserved subcarriers and the DMRS sequence are located in different subcarriers, wherein, the first reserved subcarriers are located at one side or both sides of a frequency domain resource occupied by the reference signal; and / or, the first reserved subcarriers are uniformly placed on the frequency domain resource occupied by the reference signal.

20. The method of claim 18 or 19, wherein, the second reserved subcarriers are located at one side or both sides of a frequency domain resource occupied by the second data signal; and / or, the second reserved subcarriers are uniformly placed on the frequency domain resource occupied by the second data signal.

21. The method according to any one of claims 13 to 20, characterized in that, the reference signal and the second data signal have undergone FDSS processing.

22. The method of claim 21, wherein, the reference signal and the second data signal have undergone FDSS processing, comprising: a filter used by the reference signal for the FDSS processing is different from a filter used by the second data signal for the FDSS processing.

23. The method of claim 21, wherein, the reference signal and the second data signal have undergone FDSS processing, comprising: a roll-off coefficient of a window function used by the reference signal for the FDSS processing is greater than a roll-off coefficient of a window function used by the second data signal for the FDSS processing.

24. The method of any of claims 13-23, wherein, an EPRE of the first data signal is lower than an EPRE of the DMRS sequence.

25. The method of any one of claims 1 to 24, wherein, the reference signal comprises the first data signal and the DMRS sequence, comprising: in a case where the order of the second modulation scheme is greater than or equal to a second threshold, the reference signal comprises the first data signal and the DMRS sequence.

26. The method of any one of claims 1 to 24, wherein, the method further comprises: sending indication information, the indication information being used to indicate that the reference signal comprises the first data signal.

27. The method of any of claims 1-26, wherein, the first bitstream and the second bitstream belong to a same codeword; or the first bitstream and the second bitstream belong to different codewords.

28. The method of any of claims 1-27, wherein, the reference signal and the second data signal occupy different bandwidths; and / or a first bandwidth expansion factor is greater than or equal to a second bandwidth expansion factor, wherein the first bandwidth expansion factor is a ratio of a bandwidth occupied by a first signal included in the reference signal relative to a bandwidth occupied by the reference signal, and the second bandwidth expansion factor is a ratio of a bandwidth occupied by a second signal included in the second data signal relative to a bandwidth occupied by the second data signal.

29. A communications device, characterized by comprises: a processor configured to execute a computer program stored in a memory to cause the apparatus to perform the method of any of claims 1-12 or the method of any of claims 13-28.

30. A chip, characterized by a processor coupled to a memory, the memory configured to store a computer program, and the processor configured to execute the computer program stored in the memory to implement the method of any of claims 1-12 or the method of any of claims 13-28.

31. A computer readable storage medium having stored thereon computer programs or instructions, characterized in that, The computer program or instructions, when executed by a processor, cause the method of any of claims 1-12 to be performed or the method of any of claims 13-28 to be performed.

32. A computer program product comprising instructions which, when executed on a computer, cause the method of any of claims 1-12 to be performed or the method of any of claims 13-28 to be performed.

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