Data transmission method and device and storage medium

Abstract

The invention provides a data transmission method and device and a storage medium. The method comprises the following steps: dividing data to be transmitted into N groups of first sequences; wherein the nth group of the first sequence comprises k (n) data, and k (n) is a positive integer; n = 1, 2,..., N; n is an integer greater than or equal to 2; performing inverse Fourier transform on each group of first sequences to obtain N groups of second sequences; performing frequency shift operation on the N groups of second sequences to obtain N groups of third sequences; inverse Fourier transform is carried out on the N groups of third sequences to form a group of target time domain data sequences; and transmitting the target time domain data sequence on a pre-configured time frequency resource.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a data transmission method, device and storage medium. Background Art

[0002] In 5G communication technology, Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) is used as the basic waveform, and different parameter sets (Numerology) can be used between two adjacent sub-bands, which will destroy the orthogonality between sub-carriers and bring new interference problems. As for how to solve this interference problem, one of the more direct methods is to insert a protection bandwidth between two transmission bands with different Numerologies, but this will waste frequency resources. How to design a unified waveform architecture, flexibly integrate multiple waveforms, and how to flexibly support applications with different channel bandwidths is an urgent problem to be solved. Summary of the invention

[0003] In view of this, the embodiments of the present application provide a data transmission method, device and storage medium, which reduce the guard interval, reduce the interference between systems or between sub-bands, and improve the spectrum efficiency.

[0004] The present application provides a data transmission method, including:

[0005] Divide the data to be transmitted into N groups of first sequences; wherein the nth group of the first sequence contains k(n) data, k(n) is a positive integer; n=1, 2, ..., N; N is an integer greater than or equal to 2;

[0006] Performing inverse Fourier transform on each group of the first sequences respectively to obtain N groups of second sequences;

[0007] Performing a frequency shift operation on the N groups of second sequences to obtain N groups of third sequences;

[0008] Performing inverse Fourier transform on the N groups of third sequences to form a group of target time domain data sequences;

[0009] The target time domain data sequence is transmitted on preconfigured time-frequency resources.

[0010] An embodiment of the present application provides a communication device, including: a memory, and one or more processors;

[0011] The memory is configured to store one or more programs;

[0012] When the one or more programs are executed by the one or more processors, the one or more processors implement the method described in any of the above embodiments.

[0013] An embodiment of the present application provides a storage medium, wherein the storage medium stores a computer program, and when the computer program is executed by a processor, the method described in any of the above embodiments is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a flow chart of a data transmission method provided by an embodiment of the present application;

[0015] Figure 2 It is a schematic diagram of generating a target time domain data sequence provided by an embodiment of the present application;

[0016] Figure 3 is a schematic diagram of generating another target time domain data sequence provided by an embodiment of the present application;

[0017] Figure 4 This is another schematic diagram of generating a target time domain data sequence provided by an embodiment of the present application;

[0018] Figure 5 This is a schematic diagram of generating another target time domain data sequence provided in an embodiment of the present application;

[0019] Figure 6 This is a schematic diagram of generating another target time domain data sequence provided in an embodiment of the present application;

[0020] Figure 7 This is a schematic diagram of generating another target time domain data sequence provided in an embodiment of the present application;

[0021] Figure 8 This is a schematic diagram of generating another target time domain data sequence provided in an embodiment of the present application;

[0022] Fig. 9 This is a schematic diagram of generating another target time domain data sequence provided in an embodiment of the present application;

[0023] Fig.10 This is a schematic diagram of generating another target time domain data sequence provided in an embodiment of the present application;

[0024] Fig.11 This is a schematic diagram of generating another target time domain data sequence provided in an embodiment of the present application;

[0025] Fig.12 This is a schematic diagram of generating another target time domain data sequence provided in an embodiment of the present application;

[0026] Fig.13is a transmission schematic diagram of data to be transmitted provided in an embodiment of the present application;

[0027] Fig.14 is a structural block diagram of a data transmission device provided in an embodiment of the present application;

[0028] Fig.15 It is a structural diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] The following will describe the embodiments of the present application in conjunction with the accompanying drawings. The following will describe the present application in conjunction with the accompanying drawings of the embodiments, and the examples cited are only used to explain the present application and are not used to limit the scope of the present application.

[0030] Long Term Evolution (LTE) is a 4G (Fourth Generation) wireless cellular communication technology. LTE uses orthogonal frequency division multiplexing (OFDM) technology. The time-frequency resources composed of subcarriers and OFDM symbols constitute the wireless physical time-frequency resources of the LTE system. At present, OFDM technology has been widely used in wireless communications. Due to the use of cyclic prefix CP (Cyclic Prefix), the CP-OFDM system can well solve the multipath delay problem and divide the frequency selective channel into a set of parallel flat channels, which greatly simplifies the channel estimation method and has a higher channel estimation accuracy. However, the performance of the CP-OFDM system is sensitive to the frequency offset and time offset between adjacent subbands. This is mainly because the spectrum leakage of the system is relatively large, which easily leads to inter-subband interference. At present, the LTE system uses a guard interval in the frequency domain, but this reduces the spectrum efficiency, so some new technologies are needed to suppress out-of-band leakage.

[0031] 5G NR (Fifth Generation New Radio) communication technology still uses CP-OFDM as the basic waveform, and two adjacent sub-bands can use different Numerologies, which will destroy the orthogonality between sub-carriers and bring new interference problems. As for how to solve this interference problem, one of the more direct methods is to insert a guard bandwidth between two transmission bands with different Numerologies, but this will waste frequency resources.

[0032] The frequency bands used by future 6G services will span a wide range, and the deployment methods will also be diverse. Not only will multi-bandwidth channels be required, but also waveform solutions that meet different scenarios will be required. The independent implementation of each waveform solution will increase the cost of base stations / terminals. How to design a unified waveform architecture to flexibly integrate multiple waveforms and how to flexibly support applications with different channel bandwidths is an urgent problem to be solved.

[0033] In one embodiment, Figure 1 1 is a flow chart of a data transmission method provided by an embodiment of the present application. This embodiment is applied to the case of flexibly supporting multiple bandwidth channels and supporting multiple waveforms. Figure 1 As shown, this embodiment includes: S110-S130.

[0034] S110, dividing the data to be transmitted into N groups of first sequences.

[0035] Among them, the nth group of first sequences contains k(n) data, k(n) is a positive integer; n=1,2,...,N; N is an integer greater than or equal to 2. In one example, the data to be transmitted is a data sequence that needs to be sent from the transmitter to the receiver. The data to be transmitted can be frequency domain data or time domain data. In one example, when the data to be transmitted is frequency domain data, the data to be transmitted is directly divided to obtain multiple first sequences that are also frequency domain data; in one example, when the data to be transmitted is time domain data, the data to be transmitted can be divided first to obtain N groups of data that are also time domain data, and then the divided N groups of time domain data are Fourier transformed to obtain the corresponding N groups of first sequences; it is also possible to first perform Fourier transform on the data to be transmitted, and then divide the frequency domain data obtained by Fourier transform to obtain the corresponding N groups of first sequences.

[0036] S120, performing inverse Fourier transform on each group of first sequences to obtain N groups of second sequences.

[0037] S130. Perform frequency shift operation on N groups of second sequences to obtain N groups of third sequences.

[0038] S140, performing inverse Fourier transform on the N groups of third sequences to form a group of target time domain data sequences.

[0039] S150. Transmit a target time domain data sequence on pre-configured time-frequency resources.

[0040] In an embodiment, after the data to be transmitted is divided into N groups of first sequences, Fourier transform is performed on each group of first sequences to form N groups of second sequences; frequency shift operation is performed on the N groups of second sequences to obtain N groups of third sequences; then, inverse Fourier transform is performed on the N groups of third sequences to form a group of target time domain data sequences; finally, this group of target time domain data sequences is transmitted on time-frequency resources, and by performing frequency shift operation before the second-level inverse Fourier transform, each subband can be mapped to the frequency domain position under the channel bandwidth, or the system zero frequency of each subband can be adjusted to the actual position.

[0041] In one embodiment, performing a frequency shift operation on N groups of second sequences to obtain N groups of third sequences includes:

[0042] The n-th group of second sequences in the N groups of second sequences are multiplied by the coefficient group X(n) to obtain N groups of third sequences; wherein n=1, 2, ..., N; and N is an integer greater than or equal to 2.

[0043] In one embodiment, when all elements in X(n) are 1, the nth group of second sequences does not perform a frequency shift operation.

[0044] In one embodiment, the elements included in the coefficient group X(n) satisfy at least one of the following conditions:

[0045] The modulus of each element is always 1; the coefficient group X(n) is a phase compensation coefficient group; the coefficient group X(n) is a phase sequence; X(n) is related to the zero-frequency position of the channel bandwidth and the frequency domain position corresponding to the first sequence of the nth group; the phase difference of adjacent elements is equal; the phase of each element increases or decreases at equal intervals. In one example, when the coefficient group X(n) is a sequence of elements whose modulus is always 1, X(n) is a phase compensation coefficient group, that is, the coefficient group X(n) belongs to a phase sequence. In one example, the phase difference of adjacent elements in the coefficient group X(n) is equal; in one example, the phase of each element in the coefficient group X(n) increases or decreases at equal intervals, and the position of each subband in the frequency domain can be adjusted through phase compensation.

[0046] In one embodiment, the zero frequency position of the channel bandwidth satisfies one of the following: the zero frequency position of the baseband; the zero frequency position when the N groups of third sequences are subjected to inverse Fourier transform. In one example, the zero frequency position of the channel bandwidth is also the zero frequency position of the baseband; in one example, the zero frequency position of the channel bandwidth is also the zero frequency position when the N groups of third sequences are subjected to inverse Fourier transform.

[0047] In one embodiment, before performing inverse Fourier transform on each group of first sequences to obtain N groups of second sequences, the method further includes:

[0048] Perform zero padding operation on both ends of each group of first sequences to obtain the zero-padded first sequences; wherein each group of the zero-padded first sequences contains M*s(n) data, where M is a positive integer;

[0049] The number of points for inverse Fourier transform of each group of first sequences is M*s(n). In one example, each group of first sequences is firstly padded with zeros at both ends to obtain the first sequences after zero padding, and each group of first sequences after zero padding contains M*s(n) data; then, inverse Fourier transform is performed on each group of first sequences after zero padding, that is, the number of points for inverse Fourier transform of each group of first sequences is M*s(n). In one example, the inverse Fourier transform is an oversampled inverse Fourier transform.

[0050] In one embodiment, the channel bandwidth includes N sub-bands, and each sub-band corresponds to a set of first sequences.

[0051] In one embodiment, when a subcarrier in a subband is at a zero frequency position of a baseband, a second sequence formed by a first sequence corresponding to the subband does not perform a frequency shift operation.

[0052] In one embodiment, the system zero frequency position corresponding to at least some of the sub-bands is the same as the zero frequency position of the baseband;

[0053] At least some of the sub-bands correspond to system zero-frequency positions that are different from the baseband zero-frequency positions. In one example, some of the sub-bands correspond to system zero-frequency positions that are the same as the baseband zero-frequency positions, and some of the sub-bands correspond to system zero-frequency positions that are different from the baseband zero-frequency positions.

[0054] In one embodiment, the system zero-frequency position corresponding to each sub-band is different from the frequency domain position to which the data at the zero-frequency position is mapped when the sub-band is subjected to inverse Fourier transform.

[0055] In one embodiment, the positions of zero subcarriers for inverse Fourier transform of data in different subbands with the same subcarrier spacing in the same system are the same within the subband.

[0056] In one embodiment, the system in which the subband is located includes at least one of the following: an LTE system, a 5G NR system, or a 6G system.

[0057] In one embodiment, before the nth group of second sequences in the N groups of second sequences are multiplied by the coefficient group X(n), the method further includes: adding a cyclic prefix CP of length Ncp to the N groups of second sequences; wherein Ncp is a natural number; the number of elements included in the coefficient group X(n) is the sum of Ncp and M*s(n); when Ncp is 0, it indicates that no CP is added to the second sequence. In one example, a CP of length Ncp is first added to the N groups of second sequences; and then they are multiplied by the coefficient groups; wherein the coefficient group X(n) is a sequence containing Ncp+M*s(n) elements; when the length of the CP Ncp=0, it indicates that no CP is added to the second sequence.

[0058] In one embodiment, if the zero frequency position of the inverse Fourier transform of the third sequence is aligned with the zero frequency position of the demodulation of the receiving end corresponding to the first sequence, the phase sequence of each symbol frequency shift corresponding to the first sequence is the same; if the zero frequency position of the inverse Fourier transform of the third sequence is not aligned with the zero frequency position of the demodulation of the receiving end corresponding to the first sequence, the phase sequence of the continuous symbol frequency shift corresponding to the first sequence is continuous; wherein the zero frequency position of the inverse Fourier transform of the third sequence is aligned with the zero frequency of the baseband of the transmitting end. In one embodiment, at least part of the second sequence of phase compensation coefficient groups X(n) has the same phase between continuous symbols in the time domain; at least part of the second sequence of phase compensation coefficient groups X(n) has a continuous phase between continuous symbols in the time domain. Some second sequence of phase compensation coefficient groups X(n) has the same phase between continuous symbols in the time domain; some second sequence of phase compensation coefficient groups X(n) has a continuous phase between continuous symbols in the time domain. Depending on the different systems in which the subbands are located, it can be selected to use the same phase or a continuous phase for compensation.

[0059] In one embodiment, the frequency domain operation of the time domain data carried by at least part of the sub-bands includes: a phase compensation coefficient group X1(n) with the same phase between consecutive symbols in the time domain; a phase compensation coefficient group X2(n) with continuous phase between consecutive symbols in the time domain. The frequency shift operation of the time domain data carried by some sub-bands may include two types at the same time: a phase compensation coefficient group X1(n) with the same phase between consecutive symbols in the time domain, and a phase compensation coefficient group X2(n) with continuous phase between consecutive symbols in the time domain. If the system zero frequency and baseband zero frequency of some sub-bands are different, and the system zero frequency is not in the sub-band, two types of phase compensation are required.

[0060] In one embodiment, if the frequency domain difference between the frequency domain position mapped by the data at the zero subcarrier position when the first sequence is subjected to inverse Fourier transform and the zero frequency position of the corresponding baseband is y(n), then the phase difference between adjacent elements of the phase sequence of the frequency domain point product is: mod(y(n),M*s(n)) / (M*n(n))*2π; wherein the unit of the frequency domain difference y(n) is the subcarrier spacing corresponding to the first-level inverse Fourier transform; the subcarrier spacing is the subcarrier spacing corresponding to the frequency domain subband corresponding to the first sequence. wave interval; the phase difference between adjacent elements of the phase sequence is: the difference between the phase of the latter element in the phase sequence and the phase of the previous element is: mod(y(n),M*n(n)) / (M*s(n))*2π; wherein the zero-frequency position of the baseband is the zero-frequency position of the second-level inverse Fourier transform; if the zero-frequency position of the baseband is 0 Hz, the frequency domain difference y(n) is: the ratio between the subcarrier position mapped by the data at the zero subcarrier position of the inverse Fourier transform of the first sequence and the subcarrier interval. The phase compensation coefficient can be calculated based on the specific frequency domain difference. The units of the subcarrier position and the subcarrier interval are both Hertz. In one example, the first-level inverse Fourier transform is the inverse Fourier transform performed on the first sequence; the second-level inverse Fourier transform is the inverse Fourier transform performed on the third sequence.

[0061] In one embodiment, if the frequency domain difference between the frequency domain position mapped by the data at the zero subcarrier position when the first sequence is subjected to inverse Fourier transform and the zero frequency position of the corresponding baseband is y(n), then the phase difference between adjacent elements of the phase sequence of the frequency domain dot product is: mod(y(n),M*s(n)*d(n)) / (M*s(n)*d(n))*2π; wherein d(n) is the subcarrier spacing corresponding to the frequency domain subband of the first sequence;

[0062] The phase difference between adjacent elements of the phase sequence is: the difference between the phase of the next element and the phase of the previous element in the phase sequence is: mod(y(n),M*s(n)*d(n)) / (M*s(n)*d(n))*2π; where the zero frequency position of the baseband is the zero frequency position of the second-order inverse Fourier transform;

[0063] If the zero frequency position of the baseband is 0 Hz, the frequency domain difference y(n) is: the ratio between the subcarrier position mapped by the data at the zero subcarrier position of the first sequence subjected to inverse Fourier transform and the subcarrier spacing.

[0064] In one embodiment, when the phase sequence multiplied by each symbol frequency shift is the same, the phase of the X(n) element corresponding to the first data in the second sequence without CP of each OFDM symbol is 0; when the phase sequence multiplied by each symbol frequency shift is continuous, the phase of the X(n) element corresponding to the first data in the second sequence without CP of the first OFDM symbol is 0. In this way, the 0 phase position in the compensation coefficient can be made clear.

[0065] In one embodiment, the phases between consecutive symbols of the coefficient group X(n) in the time domain are the same.

[0066] In one embodiment, the phases of the coefficient group X(n) between consecutive symbols in the time domain are the same, and X(n) corresponding to each consecutive symbol is the same.

[0067] In one embodiment, if the frequency domain zero subcarrier position corresponding to the nth group of first sequences is located on the last y(n) subcarriers of the zero frequency of the channel bandwidth, then the phase compensation coefficients of all symbols are Among them, 1:(M*s(n)+Ncp) is the serial number corresponding to the elements in the coefficient group X(n): 1, 2,...,(M*s(n)+Ncp); y(n) is a real number greater than or equal to 0; wherein the frequency domain zero subcarrier position corresponding to the first sequence is the frequency domain position in the channel bandwidth mapped to the data at the zero subcarrier position when the first sequence is inverse Fourier transformed.

[0068] In one embodiment, if the frequency domain zero subcarrier position corresponding to the nth group of first sequences is located on the first y(n) subcarriers of the zero frequency of the channel bandwidth, then the phase compensation coefficients of all symbols are Among them, 1:(M*s(n)+Ncp) is the serial number corresponding to the elements in the coefficient group X(n): 1, 2,...,(M*s(n)+Ncp); y(n) is a real number greater than or equal to 0; wherein the frequency domain zero subcarrier position corresponding to the first sequence is the frequency domain position in the channel bandwidth mapped to the data at the zero subcarrier position when the first sequence is inverse Fourier transformed.

[0069] In one embodiment, if the zero frequency of the channel bandwidth is at the frequency domain zero subcarrier position corresponding to the nth group of first sequences, the elements in X(n) of all symbols are 1, and the nth group of second sequences of all symbols are not multiplied by the coefficient group;

[0070] The phase of the element in X(n) corresponding to the first data in the second sequence of each OFDM symbol not including the CP is 0.

[0071] In one embodiment, the phase between consecutive symbols in the coefficient group X(n) in the time domain is continuous and changes at equal intervals; the X(n) corresponding to consecutive symbols in the time domain are different, and the phase differences between all adjacent elements in multiple continuous phase compensation coefficient groups X(n) corresponding to the consecutive symbols are the same.

[0072] In one embodiment, if the system zero frequency of the subband where the nth group of first sequences is located is on the y(n)th subcarriers after the baseband zero frequency position, and y(n) is a real number >=0, then X(n,m) of the mth symbol = exp(-2πj / M / s(n)*y(n)*([1:(M*s(n)+Ncp)]-Ncp-1+(m-1)*(M*s(n)+Ncp))).

[0073] In one embodiment, if the system zero frequency of the subband where the nth group of first sequences is located is on the first y(n) subcarriers of the baseband zero frequency position, and y(n) is a real number >=0, then X(n,m) of the mth symbol = exp(2πj / M / s(n)*y(n)*([1:(M*s(n)+Ncp)]-Ncp-1+(m-1)*(M*s(n)+Ncp))).

[0074] In one embodiment, the number of data k(n) included in each group of first sequences satisfies one of the following conditions: any positive integer; an integer multiple of a resource block RB; 2 to the power of i; the ratio of two adjacent k(n)s satisfies 2 to the power of i; k(n)s are the same. In one example, the number of data k(n) included in each group of first sequences is any positive integer; in one example, the number of data k(n) included in each group of first sequences satisfies 12 to the power of i, that is, an integer multiple of one RB. In one example, the number of data k(n) included in each group satisfies 2 to the power of i (that is, 2 i ), where i is an integer greater than or equal to 0. In one example, the ratio between the number of data k(n) contained in each group of the first sequence satisfies 2 to the power of i (i.e., 2 i ), wherein i is an integer greater than or equal to 0. In one example, the number of data k(n) included in each group of first sequences is the same.

[0075] In one embodiment, a zero padding operation is performed on both ends of each group of first sequences, and [M*s(n)-k(n)] / 2 zero data are added to both ends of each group of first sequences.

[0076] In one embodiment, the number of points for inverse Fourier transform of each group of first sequences satisfies one of the following conditions: the ratio of the number of points for inverse Fourier transform of two adjacent groups of first sequences satisfies 2 to the power of i; the number of points for inverse Fourier transform of each group of first sequences is the same; where i is an integer. In one example, inverse Fourier transform of M*s(n) points is performed on each group of third sequences, and the ratio of the number of points for inverse Fourier transform of each group of third sequences satisfies 2 to the power of i (i.e., 2 i ), wherein i is an integer greater than or equal to 0. In one example, each group of third sequences is subjected to inverse Fourier transform with M*s(n) points, and each group of third sequences is subjected to inverse Fourier transform with the same number of points.

[0077] In one embodiment, the data to be transmitted at least includes: constellation point modulated data; the data to be transmitted also includes: at least one reference signal data. In one embodiment, the data to be transmitted may include constellation point modulated data. In one embodiment, the data to be transmitted may include: constellation point modulated data, and at least one reference signal data.

[0078] In one embodiment, inverse Fourier transform is performed on N groups of third sequences to form a group of target time domain data sequences, including:

[0079] Performing frequency domain zero padding and cyclic shift operations on other P groups of initial frequency domain data sequences in turn to obtain other P groups of target frequency domain data sequences;

[0080] Perform inverse Fourier transform on N groups of third sequences and other P groups of target frequency domain data sequences to form a group of target time domain data sequences; wherein the other P groups of target frequency domain data sequences include: data after M times frequency domain oversampling, and data sequences not included in the data sequence generated by the data sequence to be transmitted. In one example, perform inverse Fourier transform on N groups of third sequences and other P groups of initial frequency domain data sequences together to form a group of target time domain data sequences. Among them, the other P groups of initial frequency domain data sequences can be data after M times frequency domain oversampling, or can be data sequences that are not generated by the data to be transmitted. In one example, the other P groups of initial frequency domain data sequences are first padded with zeros in the frequency domain, and then cyclically shifted to obtain the other P groups of target frequency domain data sequences; then perform inverse Fourier transform on N groups of third sequences and other P groups of target frequency domain data sequences together to form a group of target time domain data sequences.

[0081] In one embodiment, inverse Fourier transform is performed on N groups of third sequences to form a group of target time domain data sequences, including:

[0082] Every N data is subjected to an oversampled inverse Fourier transform, and every N data is respectively from N groups of third sequences. In one example, the process of performing an inverse Fourier transform on the N groups of third sequences includes: every N data is subjected to an oversampled inverse Fourier transform, and every N data is respectively from N groups of third sequences.

[0083] In one embodiment, a set of target time domain data sequences is formed by serially linking multiple initial time domain data sequences generated by performing multiple inverse Fourier transforms on the third sequence; wherein the number of initial time domain data sequences is equal to the number of operations of the inverse Fourier transform. The initial time domain data sequence refers to a sub-symbol obtained by performing an oversampled inverse Fourier transform on the third sequence. In an embodiment, an oversampled inverse Fourier transform is performed on N data in the third sequence to obtain corresponding sub-symbols, and then the sub-symbols are repeatedly extended and finally serially connected in the time domain to obtain a corresponding set of target time domain data sequences.

[0084] In one embodiment, the process of generating an initial time domain data sequence by an inverse Fourier transform in multiple inverse Fourier transforms includes: extracting N data of the same number as the total number of groups of the first sequence from N groups of third sequences; performing an oversampled inverse Fourier transform on the N data to obtain a corresponding initial time domain data sequence; wherein the N data are respectively from the N groups of third sequences. Exemplarily, it is assumed that the N groups of third sequences are distributed in N rows (i.e., one group of third sequences is distributed in one row), and then N data are selected according to the column number (i.e., data of one column are selected), and then an oversampled inverse Fourier transform is performed on each of the selected N data (i.e., data of each column). For another example, it is assumed that the N groups of third sequences are distributed in N columns (i.e., one group of third sequences is distributed in one column), and then N data are selected according to the row number (i.e., data of one row are selected), and then an oversampled inverse Fourier transform is performed on each of the selected N data (i.e., data of each row).

[0085] In one embodiment, the serial connection interval of the target time domain data sequence is 1 / M of the length after the inverse Fourier transform of the N target data is oversampled. In the embodiment, the target time domain data sequence generated by the inverse Fourier transform is serially connected, and the serial connection interval between each two adjacent groups of initial time domain data sequences is: half of the length after the inverse Fourier transform of each N target data is oversampled, that is, half of the sub-symbol length. Among them, each N target data refers to a data extracted from each of the N groups of third sequences, forming N target data.

[0086] In one embodiment, the process of generating multiple initial time domain data sequences by multiple inverse Fourier transforms includes: for subbands with different subcarrier spacings, taking the length of the third sequence corresponding to the subband with the minimum subcarrier spacing as the reference length; for the third sequence corresponding to the subband with non-minimum subcarrier spacing, selecting at least two groups of third sequences, serially connecting them to form a sequence with the same length as the reference length, forming a new N groups of third sequences, and performing multiple inverse Fourier transforms on the new N groups of third sequences to obtain the corresponding multiple initial time domain data sequences. Among them, the subbands with different subcarrier spacings represent the first sequences with different numbers of data.

[0087] In one embodiment, each group of first sequences is transmitted in a corresponding frequency domain resource block; each frequency domain resource block includes Z subcarriers; the number of data included in each group of second sequences meets one of the following conditions: M*s(n); greater than or equal to M times the number of subcarriers included in each frequency domain resource block. In one example, among N groups of second sequences, the number of data included in each group of second sequences is M*s(n), that is, greater than or equal to M times the number of subcarriers included in each frequency domain resource block.

[0088] In one embodiment, the zero frequency position of the third sequence when the inverse Fourier transform operation is performed is within the range of the corresponding frequency domain resource block; the zero frequency positions of different groups of third sequences when the inverse Fourier transform operation is performed are different. In the embodiment, the zero frequency position refers to the zero subcarrier in the frequency domain resource block (i.e., the 0th subcarrier, which can also be understood as the subcarrier index is 0).

[0089] In one embodiment, the zero frequency position during the inverse Fourier transform operation is one of the subcarriers included in each frequency domain resource block. In an embodiment, the zero frequency position (i.e., zero subcarrier) during the inverse Fourier transform operation in each group of original data sequences is one of the subcarriers included in each frequency domain resource block.

[0090] In one embodiment, the frequency domain resource blocks include: all frequency domain resource blocks in the channel bandwidth; some frequency domain resource blocks in the channel bandwidth;

[0091] The data to be transmitted includes: all the data to be transmitted in the channel bandwidth; and part of the data to be transmitted in the channel bandwidth.

[0092] In one embodiment, the data transmission method further includes: filtering a set of target time domain data sequences; wherein the filtering operation includes one of the following: single-phase filtering and multi-phase filtering.

[0093] In one embodiment, the filter function used in the polyphase filtering includes one of the following: a root raised cosine function; a raised cosine function; a rectangular function; an isotropic orthogonal transform algorithm IOTA function.

[0094] In one embodiment, the data transmission method further includes: performing a windowing operation on a set of target time domain data sequences.

[0095] Example 1

[0096] In one example, Figure 2 This is a schematic diagram of generating a target time domain data sequence provided by an embodiment of the present application. In the embodiment, the generation process of the target time domain data sequence is described by taking the number of groups N of the first sequence as 4, the number of data contained in each group of the first sequence as the same, which is 64, and the number of zeros padded at both ends of each group of the first sequence as 32 as an example.

[0097] like Figure 2 As shown, in this embodiment, the data to be transmitted is divided into 4 groups of first sequences, each of which contains 64 data. 32 zero subcarriers are added to both ends of each group of first sequences to form 4 groups of zero-padded first sequences, each of which contains 128 points. Then, a 128-point inverse Fourier transform is performed on each group of zero-padded first sequences to form 4 groups of second sequences.

[0098] Assuming that the zero frequency position of the channel bandwidth is at the 0 subcarrier position when the first group of data is subjected to inverse Fourier transform, a frequency shift operation is performed on the second and fourth groups of data, i.e., they are multiplied by coefficient groups X(2) and X(4) to obtain the corresponding third sequence; the phases of the phase compensation coefficient groups X(2) and X(4) in the time domain between consecutive symbols are the same.

[0099] Assuming that the zero frequency position of the channel bandwidth is respectively on the first 64 and 192 subcarriers of the 0 subcarrier position when the second and fourth groups of data are inverse Fourier transformed, then X(2)=X(4)=exp(2πj / 2 / 64*64*(-Ncp:2*64-1)) of all symbols, Ncp is the length of CP, Ncp=4, then X(2)=X(4)=exp(πj*(-4:127));

[0100] Then, the four groups of third sequences are subjected to subband-level inverse Fourier transform and polyphase filtering operations to form a group of target time-domain data sequences, and the group of target time-domain data sequences is transmitted on the time-frequency resources.

[0101] Example 2

[0102] In one example, Figure 3 This is another schematic diagram of generating a target time domain data sequence provided in an embodiment of the present application. In the embodiment, the generation process of the target time domain data sequence is described by taking the number of groups N of the first sequence as 4, the number of data contained in each group of the first sequence as the same, which is 64, and the number of zeros padded at both ends of each group of the first sequence as 32 as an example.

[0103] like Figure 3 As shown, in this embodiment, the data to be transmitted is divided into 4 groups of first sequences, each of which contains 64 data. 32 zero subcarriers are added to both ends of each group of first sequences to form 4 groups of zero-padded first sequences, and the number of points of each group of zero-padded first sequences is 128. Then, a 128-point inverse Fourier transform is performed on the zero-padded first sequences to form 4 groups of second sequences.

[0104] Assuming that the zero frequency position of the channel bandwidth is at the 0 subcarrier position when the second group of data is subjected to inverse Fourier transform, a frequency shift operation is performed on the first and third groups of data, i.e., they are multiplied by the coefficient groups X(1) and X(3) to obtain the corresponding third sequence; the phases between consecutive symbols in the time domain of the phase compensation coefficient groups X(1) and X(3) are the same.

[0105] Assuming that the zero frequency position of the channel bandwidth is respectively on the last 64 and first 64 subcarriers of the 0 subcarrier position when the second and fourth groups of data are subjected to inverse Fourier transform, then X(1)=exp(-2πj / 2 / 64*64*(-Ncp:2*64-1)), X(3)=exp(2πj / 2 / 64*64*(-Ncp:2*64-1)) of all symbols, Ncp is the length of cp, Ncp=4, then X(1)=exp(-πj*(-4:127)), X(3)=exp(πj*(-4:127));

[0106] Then, the four groups of third sequences are subjected to subband-level inverse Fourier transform and polyphase filtering operations to form a group of target time-domain data sequences, and the group of target time-domain data sequences is transmitted on the time-frequency resources.

[0107] Example 3

[0108] In one example, Figure 4 This is another schematic diagram of generating a target time domain data sequence provided by an embodiment of the present application. In the embodiment, the generation process of the target time domain data sequence is described by taking the number of groups N of the first sequence as 4, the number of data contained in each group of the first sequence as the same, which is 48, and the number of zeros padded at both ends of each group of the first sequence as 40 as an example.

[0109] like Figure 4 As shown, in this embodiment, the data to be transmitted is divided into 4 groups of first sequences, each of which contains 48 data. 40 zero subcarriers are added to both ends of each group of first sequences to form 4 groups of zero-padded first sequences, each of which contains 128 points. Then, a 128-point inverse Fourier transform is performed on the zero-padded first sequence to form 4 groups of second sequences.

[0110] Assuming that the zero frequency position of the channel bandwidth is at the 0 subcarrier position when the first group of data is subjected to inverse Fourier transform, the second, third and fourth groups of data are subjected to frequency shift operation, i.e., multiplied by coefficient groups X(2), X(3) and X(4) to obtain the corresponding third sequence; the phases of consecutive symbols in the time domain of the phase compensation coefficient groups X(2), X(3) and X(4) are the same.

[0111] Assuming that the zero frequency position of the channel bandwidth is respectively on the first 48, 96, and 144 subcarriers of the 0 subcarrier position when the second, third, and fourth groups of data are inverse Fourier transformed, then X(2)=exp(2πj / 2 / 64*48*(-Ncp:2*64-1)), X(3)=exp(2πj / 2 / 64*96*(-Ncp:2*64-1)), X(4)=exp(2πj / 2 / 64*144*(-Ncp:2*64-1)), Ncp is the length of cp, Ncp=4, then X(2)=exp(3πj / 4*(-4:127)), X(3)=exp(3πj / 2*(-4:127)), X(4)=exp(πj / 4*(-4:127));

[0112] Then, the four groups of third sequences are subjected to subband-level inverse Fourier transform and polyphase filtering operations to form a group of target time-domain data sequences, and the group of target time-domain data sequences is transmitted on the time-frequency resources.

[0113] Example 4

[0114] In one example, Figure 5 This is another schematic diagram of generating a target time domain data sequence provided in an embodiment of the present application. In the embodiment, the generation process of the target time domain data sequence is described by taking the number of groups N of the first sequence as 4, the number of data contained in each group of the first sequence as the same, both as 40, and the number of zeros padded at both ends of each group of the first sequence as 44 as an example.

[0115] like Figure 5 As shown, in this embodiment, the data to be transmitted is divided into 4 groups of first sequences, each group of first sequences contains 40 data. 44 zero subcarriers are added to both ends of each group of first sequences to form 4 groups of zero-padded first sequences, and the number of points of each group of zero-padded first sequences is 128. Then, a 128-point inverse Fourier transform is performed on the zero-padded first sequences to form 4 groups of second sequences.

[0116] Assuming that the zero frequency position of the channel bandwidth is at the 0 subcarrier position when the first group of data is subjected to inverse Fourier transform, the second, third and fourth groups of data are subjected to frequency shift operation, i.e., multiplied by coefficient groups X(2), X(3) and X(4) to obtain the corresponding third sequence; the phases of consecutive symbols in the time domain of the phase compensation coefficient groups X(2), X(3) and X(4) are the same.

[0117] Assuming that the zero-frequency position of the channel bandwidth is respectively on the first 40, 80, and 120 subcarriers of the 0 subcarrier position when the second, third, and fourth groups of data are subjected to inverse Fourier transform, then X(2)=exp(2πj / 2 / 64*40*(-Ncp:2*64-1)), X(3)=exp(2πj / 2 / 64*80*(-Ncp:2*64-1)), X(4)=exp(2πj / 2 / 64*120*(-Ncp:2*64-1)), Ncp is the length of cp, Ncp=4, then X(2)=exp(5πj / 8*(-4:127)), X(3)=exp(5πj / 4*(-4:127)), X(4)=exp(15πj / 8*(-4:127));

[0118] Then, the four groups of third sequences are subjected to subband-level inverse Fourier transform and polyphase filtering operations to form a group of target time-domain data sequences, and the group of target time-domain data sequences is transmitted on the time-frequency resources.

[0119] Example 5

[0120] In one example, Figure 6 This is another schematic diagram of generating a target time domain data sequence provided in an embodiment of the present application. In the embodiment, the generation process of the target time domain data sequence is described by taking the number of groups N of the first sequence as 4, the number of data contained in each group of the first sequence as the same, both as 40, and the number of zeros padded at both ends of each group of the first sequence as 44 as an example.

[0121] like Figure 6 As shown, in this embodiment, the data to be transmitted is divided into 4 groups of first sequences, each of which contains 40 data. 44 zero subcarriers are added to both ends of each group of first sequences to form 4 groups of zero-padded first sequences, each of which contains 128 points. Then, a 128-point inverse Fourier transform is performed on the zero-padded first sequence to form 4 groups of second sequences.

[0122] Assuming that the zero frequency position of the channel bandwidth is at the position of the first 0.5 subcarrier of the 0 subcarrier when the first group of data is subjected to inverse Fourier transform, the first, second, third and fourth groups of data are subjected to frequency shift operation, i.e., multiplied by the coefficient groups X(1), X(2), X(3) and X(4) to obtain the corresponding third sequence; the phases of the phase compensation coefficient groups X(1), X(2), X(3) and X(4) in the time domain are the same between consecutive symbols.

[0123] Assuming that the zero frequency position of the channel bandwidth is respectively 0.5, 40.5, 80.5, and 120.5 subcarriers before the 0 subcarrier position when the second, third, and fourth groups of data are inverse Fourier transformed, then X(1) = exp(2πj / 2 / 64*0.5*(-Ncp:2*64-1)), X(2) = exp(2πj / 2 / 64*40.5*(-Ncp:2*64-1)), and X(3) = exp(2πj / 2 / 64*80.5*(-Ncp: 2*64-1)), X(4)=exp(2πj / 2 / 64*120.5*(-Ncp:2*64-1)), Ncp is the length of cp, Ncp=4, then X(1)=exp(πj / 128*(-4:127)), X(2)=exp(81πj / 128*(-4:127)), X(3)=exp(161πj / 128*(-4:127)), X(4)=exp(241πj / 128*(-4:127));

[0124] Then, the four groups of third sequences are subjected to subband-level inverse Fourier transform and polyphase filtering operations to form a group of target time-domain data sequences, and the group of target time-domain data sequences is transmitted on the time-frequency resources.

[0125] Example 6

[0126] In one example, Figure 7 This is another schematic diagram of generating a target time domain data sequence provided by an embodiment of the present application. In the embodiment, the generation process of the target time domain data sequence is described by taking the number of groups N of the first sequence as 2, the number of data contained in each group of the first sequence as the same, both as 256, and the number of zeros padded at both ends of each group of the first sequence as 128 as an example.

[0127] like Figure 7 As shown, in this embodiment, the data to be transmitted is divided into two groups of first sequences, each of which contains 256 data. 128 zero subcarriers are added to both ends of each group of first sequences to form two groups of zero-padded first sequences, each of which contains 512 points. Then, a 512-point inverse Fourier transform is performed on the zero-padded first sequence to form two groups of second sequences.

[0128] Assuming that the zero-frequency position of the system where the first set of data is located is at the first 5 subcarrier positions of the 0 subcarrier when it is subjected to inverse Fourier transform, a frequency shift operation is performed on the first set of data, that is, multiplied by the coefficient group X(1); since the zero-frequency position of the system where the second set of data is located is at the first 3 subcarrier positions of the 0 subcarrier when it is subjected to inverse Fourier transform, a frequency shift operation is performed on the second set of data, that is, multiplied by the coefficient group X(2) to obtain a corresponding third sequence; the phases of the phase compensation coefficient groups X(1) and X(2) between consecutive symbols in the time domain are continuous.

[0129] Then the mth symbol

[0130] X(1,m)=exp(2πj / 2 / 256*5*[(-Ncp:2*256-1)+(m-1)*(2*256+Ncp)]),

[0131] X(2,m)=exp(2πj / 2 / 256*3*[(-Ncp:2*256-1)+(m-1)*(2*256+Ncp)]),

[0132] Ncp is the length of cp, Ncp = 32, then

[0133] X(1,m)=exp(5πj / 256*[(-32:2*256-1)+(m-1)*544]),

[0134] X(2,m)=exp(3πj / 256*[(-32:2*256-1)+(m-1)*544]),

[0135] Then, subband-level inverse Fourier transform and polyphase filtering operations are performed on the two groups of third sequences to form a group of target time-domain data sequences, and the group of target time-domain data sequences is transmitted on the time-frequency resources.

[0136] Example 7

[0137] In one example, Figure 8 This is another schematic diagram of generating a target time domain data sequence provided in an embodiment of the present application. In the embodiment, the generation process of the target time domain data sequence is described by taking the number of groups N of the first sequence as 4, the number of data contained in each group of the first sequence as the same, which is 64, and the number of zeros padded at both ends of each group of the first sequence as 32 as an example.

[0138] like Figure 8As shown, in this embodiment, the data to be transmitted is divided into 4 groups of first sequences, each of which contains 64 data. 32 zero subcarriers are added to both ends of each group of first sequences to form 4 groups of zero-padded first sequences, each of which contains 128 points. Then, a 128-point inverse Fourier transform is performed on the zero-padded first sequence to form 4 groups of second sequences.

[0139] Assuming that the zero frequency position of the channel bandwidth is at the 0 subcarrier position when the first group of data is subjected to inverse Fourier transform, a frequency shift operation is performed on the second and fourth groups of data, i.e., they are multiplied by the coefficient groups X(2) and X(4) to obtain the corresponding third sequence; the phases between consecutive symbols in the time domain of the phase compensation coefficient groups X(2) and X(4) are the same.

[0140] Assuming that the zero frequency position of the channel bandwidth is respectively on the first 64 and 192 subcarriers of the 0 subcarrier position when the second and fourth groups of data are subjected to inverse Fourier transform, then X(2)=X(4)=exp(2πj / 2 / 64*64*(-Ncp:2*64-1)) of all symbols, Ncp is the length of cp, Ncp=4, then X(2)=X(4)=exp(πj*(-4:127));

[0141] Then, the four groups of third sequences and other groups of data are subjected to sub-band inverse Fourier transform and polyphase filtering operations to form a group of target time domain data sequences. Among them, the other groups of data contain 64 data, which are also subjected to zero padding, IDFT, frequency shift and other operations before being processed at the sub-band level. The group of target time domain data sequences is transmitted on the time-frequency resources.

[0142] Example 8

[0143] In one example, Fig. 9 This is another schematic diagram of generating a target time domain data sequence provided by an embodiment of the present application. In the embodiment, taking the number of groups N of the first sequence as 4, the number of data contained in each group of the first sequence being the same, both being 64, and the first group of the first sequence containing 32 reference signals, and the number of zero padding at both ends of each group of the first sequence being 32 as an example, the generation process of the target time domain data sequence is described.

[0144] like Fig. 9 As shown, in this embodiment, the data to be transmitted is divided into 4 groups of first sequences, each group of first sequences contains 64 data, and the first group contains 32 reference signals. 32 zero subcarriers are added to both ends of each group of first sequences to form 4 groups of zero-padded first sequences, and the number of points contained in each group of zero-padded first sequences is 128. Then, a 128-point inverse Fourier transform is performed on the zero-padded first sequences to form 4 groups of second sequences.

[0145] Assuming that the zero frequency position of the channel bandwidth is at the 0 subcarrier position when the first group of data is subjected to inverse Fourier transform, a frequency shift operation is performed on the second and fourth groups of data, i.e., they are multiplied by the coefficient groups X(2) and X(4) to obtain the corresponding third sequence; the phases between consecutive symbols in the time domain of the phase compensation coefficient groups X(2) and X(4) are the same.

[0146] Assuming that the zero frequency position of the channel bandwidth is respectively on the first 64 and 192 subcarriers of the 0 subcarrier position when the second and fourth groups of data are subjected to inverse Fourier transform, then X(2)=X(4)=exp(2πj / 2 / 64*64*(-Ncp:2*64-1)) of all symbols, Ncp is the length of cp, Ncp=4, then X(2)=X(4)=exp(πj*(-4:127)); then perform subband-level inverse Fourier transform and polyphase filtering operations on the four groups of third sequences to form a group of target time domain data sequences. The group of target time domain data sequences is transmitted on the time-frequency resources.

[0147] Example 9

[0148] In one example, Fig.10 This is another schematic diagram of generating a target time domain data sequence provided by an embodiment of the present application. In the embodiment, the number of groups N of the first sequence is 4, the number of data contained in the first two groups of the first sequence is the same, both are 32; the number of data contained in the second two groups of the first sequence is the same, both are 64; and the number of zeros padded at both ends of the first two groups of the first sequence is 16, and the number of zeros padded at both ends of the second two groups of the first sequence is 32 as an example, the generation process of the target time domain data sequence is described.

[0149] like Fig.10 As shown, in this embodiment, the data to be transmitted is divided into 4 groups of first sequences, each of the first two groups contains 32 data, and each of the first sequences of the last two groups contains 64 data. 16 0 subcarriers are added to both ends of each group of first sequences of the first two groups, and the number of points contained in each group of zero-padded first sequences is 64. 32 0 subcarriers are added to both ends of each group of first sequences of the last two groups, and the number of points contained in each group of zero-padded first sequences is 128, forming a total of 4 groups of first sequences after zero-padded.

[0150] Assuming that the zero frequency position of the channel bandwidth is at the 0 subcarrier position when the first group of data is subjected to inverse Fourier transform, a frequency shift operation is performed on the second and fourth groups of data, i.e., they are multiplied by the coefficient groups X(2) and X(4) to obtain the corresponding third sequence; the phases between consecutive symbols in the time domain of the phase compensation coefficient groups X(2) and X(4) are the same.

[0151] Assuming that the zero frequency position of the channel bandwidth is respectively on the first 32 subcarriers of the 0 subcarrier position when the second group of data is subjected to inverse Fourier transform, then X(2)=exp(2πj / 2 / 32*32*(-Ncp:2*32-1)) for all symbols, Ncp is the length of cp, Ncp=2, then X(2)=exp(πj*(-2:63));

[0152] Assuming that the zero frequency position of the channel bandwidth is respectively on the first 192 subcarriers of the 0 subcarrier position when the fourth group of data is subjected to inverse Fourier transform, then X(4)=exp(2πj / 2 / 64*192*(-Ncp:2*64-1)) of all symbols, Ncp is the length of cp, Ncp=4, then X(4)=exp(πj*(-4:127));

[0153] Then the first two groups of data are subjected to 64-point inverse Fourier transform, and the second two groups of data are subjected to 128-point inverse Fourier transform. The first two groups of data are connected in series with the symbol data of the next moment to form two groups of data with a length of 128 points, and then together with the second two groups of data, four groups of 128-point third sequences are formed; then the four groups of third sequences are subjected to subband-level inverse Fourier transform and polyphase filtering operations to form a group of target time domain data sequences. The group of target time domain data sequences is transmitted on the time-frequency resources.

[0154] Example 10

[0155] In one example, Fig.11 This is another schematic diagram of generating a target time domain data sequence provided by an embodiment of the present application. In the embodiment, the generation process of the target time domain data sequence is described by taking the number of groups N of the first sequence as 4, the number of data contained in each group of the first sequence as the same, which is 64, and the number of zeros padded at both ends of each group of the first sequence as 32 as an example.

[0156] like Fig.11 As shown, in this embodiment, the data to be transmitted is divided into 4 groups of first sequences, each of which contains 64 data. 32 zero subcarriers are added to both ends of each group of first sequences to form 4 groups of zero-padded first sequences, each of which contains 128 points. Then, a 128-point inverse Fourier transform is performed on the zero-padded first sequence to form 4 groups of second sequences.

[0157] Assuming that the zero frequency position of the channel bandwidth is at the 0 subcarrier position when the first group of data is subjected to inverse Fourier transform, a frequency shift operation is performed on the second and fourth groups of data, i.e., they are multiplied by the coefficient groups X(2) and X(4) to obtain the corresponding third sequence; the phases between consecutive symbols in the time domain of the phase compensation coefficient groups X(2) and X(4) are the same.

[0158] Assuming that the zero-frequency position of the channel bandwidth is on the first 64 and 192 subcarriers of the 0 subcarrier position when the second and fourth groups of data are inverse Fourier transformed, respectively, then X(2)=X(4)=exp(2πj / 2 / 64*64*(-Ncp:2*64-1)) of all symbols, Ncp is the length of cp, Ncp=4, then X(2)=X(4)=exp(πj*(-4:127));.

[0159] Then, one data is taken out from each group of the third sequence in sequence according to the columns, and a total of four data are taken out. An oversampled 16-point inverse Fourier transform is performed on each of the four taken out data to obtain a sub-symbol, and each sub-symbol is repeatedly expanded by 4 times. Finally, 128 sub-symbols are connected in series in the time domain to form a group of target time domain data sequences, wherein the interval during the series connection is 8 points, that is, half the sub-symbol length. The group of target time domain data sequences is transmitted on the time-frequency resources.

[0160] Example 11

[0161] In one example, Fig.12 This is another schematic diagram of generating a target time domain data sequence provided by an embodiment of the present application. In the embodiment, the generation process of the target time domain data sequence is described by taking the number of groups N of the first sequence as 3 and the number of data contained in each group of the first sequence as the same, which is 12.

[0162] like Fig.12 As shown, in this embodiment, the data to be transmitted is divided into 3 groups of first sequences, each group of first sequences contains 12 data. The 3 groups of data correspond to 3 subbands, which are 3 shaded compensations in the figure, 1, 2, and 3 subbands from top to bottom, with the same subcarrier spacing, and there are 12 0 subcarriers between the 1st subband and the 3rd subband as a protection interval, and there is no protection interval between the 2nd and 3rd subbands; the system zero frequency of subband 1 is the 8th subcarrier in subband 1, the system zero frequency of subbands 2 and 3 is the 6th subcarrier in subband 3, and the system zero frequency of subbands 2 and 3 is the baseband zero frequency.

[0163] Ten zero subcarriers are added to both ends of each group of first sequences to form three groups of zero-padded first sequences, and the number of points in each group of zero-padded first sequences is 32. Then, a 32-point inverse Fourier transform is performed on the zero-padded first sequences to form three groups of second sequences.

[0164] The first and second groups of data are subjected to frequency shift operation, i.e., multiplied by coefficient groups X(1) and X(2), to obtain the corresponding third sequence; the phases between consecutive symbols in the time domain of the phase compensation coefficient group X(1) are continuous, and the phases between consecutive symbols in the time domain of the phase compensation coefficient group X(2) are the same.

[0165] For subband 1, since the frequency domain position mapped by the data at the zero subcarrier position during the inverse Fourier transform of subband 1 and the frequency domain difference between the zero frequency position of the corresponding baseband is -34 subcarrier intervals, the phase difference between adjacent elements of the phase sequence multiplied by the frequency shift is: mod(-34,2*16) / (2*16)*2π=-π / 8, and the phase of the X(n) element corresponding to the first data without CP of the first OFDM symbol is 0;

[0166] For subband 2, since the frequency domain position mapped by the data at the zero subcarrier position during the inverse Fourier transform of subband 2 and the frequency domain difference between the zero frequency position of the corresponding baseband is -12 subcarrier intervals, the phase difference between adjacent elements of the phase sequence multiplied by the frequency shift is: mod(-12,2*16) / (2*16)*2π=-3π / 4, and the phase of the X(n) element corresponding to the first data without CP of each OFDM symbol is 0;

[0167] Then, the four groups of third sequences are subjected to subband-level inverse Fourier transform and polyphase filtering operations to form a group of target time-domain data sequences, and the group of target time-domain data sequences is transmitted on the time-frequency resources.

[0168] Example 12

[0169] In one example, Fig.13 Schematic diagram of a transmission of data to be transmitted provided by an embodiment of the present application. Fig.13 As shown, the data to be transmitted is windowed or filtered in sequence; then the DAC and RF processes are performed.

[0170] like Fig.13 As shown, transmitting the set of data to be transmitted also includes windowing or filtering the data to be transmitted, and then performing DAC and RF processes.

[0171] The windowing process includes: grouping the target time domain data sequence corresponding to the data to be transmitted, then performing period extension, then performing point multiplication by a preset function, and then performing staggered superposition between the groups.

[0172] The filtering is single-phase filtering or multi-phase filtering, and the multi-phase filtering is filtering each group of the new N groups of data sequences.

[0173] In one embodiment, Fig.14 is a structural block diagram of a data transmission device provided in an embodiment of the present application. Fig.14 As shown, the data transmission device in this embodiment includes: a division module 1410, a first transformation module 1420, a first conversion module 1430, a second transformation module 1440 and a transmission module 1450.

[0174] The division module 1410 is configured to divide the data to be transmitted into N groups of first sequences.

[0175] The nth group of first sequences contains k(n) data, k(n) is a positive integer; n=1, 2, ..., N; N is an integer greater than or equal to 2.

[0176] A first transform module 1420 is configured to perform inverse Fourier transform on each group of first sequences to obtain N groups of second sequences;

[0177] A first conversion module 1430 is configured to perform a frequency shift operation on the N groups of second sequences to obtain N groups of third sequences;

[0178] The second transformation module 1440 is configured to perform inverse Fourier transformation on the N groups of third sequences to form a group of target time domain data sequences.

[0179] The transmission module 1450 is configured to transmit the target time domain data sequence on the pre-configured time-frequency resources.

[0180] In one embodiment, performing a frequency shift operation on N groups of second sequences to obtain N groups of third sequences includes:

[0181] The n-th group of second sequences in the N groups of second sequences are multiplied by the coefficient group X(n) to obtain N groups of third sequences; wherein n=1, 2, ..., N; and N is an integer greater than or equal to 2.

[0182] In one embodiment, when all elements in X(n) are 1, the nth group of second sequences does not perform a frequency shift operation.

[0183] In one embodiment, the elements included in the coefficient group X(n) satisfy at least one of the following conditions:

[0184] The modulus of each element is always 1; the coefficient group X(n) is a phase compensation coefficient group; the coefficient group X(n) is a phase sequence; X(n) is related to the zero-frequency position of the channel bandwidth and the frequency domain position corresponding to the first sequence of the nth group; the phase difference of adjacent elements is equal; the phase of each element increases or decreases at equal intervals.

[0185] In one embodiment, the zero-frequency position of the channel bandwidth satisfies one of the following: the zero-frequency position of the baseband; the zero-frequency position when performing inverse Fourier transform on N groups of third sequences.

[0186] In one embodiment, before performing inverse Fourier transform on each group of first sequences to obtain N groups of second sequences, the method further includes:

[0187] Perform zero padding operation on both ends of each group of first sequences to obtain the zero-padded first sequences; wherein each group of the zero-padded first sequences contains M*s(n) data, where M is a positive integer;

[0188] The number of points for performing inverse Fourier transform on each group of first sequences is M*s(n).

[0189] In one embodiment, the channel bandwidth includes N sub-bands, and each sub-band corresponds to a set of first sequences.

[0190] In one embodiment, when a subcarrier in a subband is at a zero frequency position of a baseband, a second sequence formed by a first sequence corresponding to the subband does not perform a frequency shift operation.

[0191] In one embodiment, the system zero frequency position corresponding to at least some of the sub-bands is the same as the zero frequency position of the baseband;

[0192] The system zero-frequency position corresponding to at least some of the sub-bands is different from the zero-frequency position of the baseband.

[0193] In one embodiment, the system zero-frequency position corresponding to each sub-band is different from the frequency domain position to which the data at the zero-frequency position is mapped when the sub-band is subjected to inverse Fourier transform.

[0194] In one embodiment, the positions of zero subcarriers for inverse Fourier transform of data in different subbands with the same subcarrier spacing in the same system are the same within the subband.

[0195] In one embodiment, the system in which the subband is located includes at least one of the following: an LTE system, a 5G NR system, or a 6G system.

[0196] In one embodiment, before multiplying the n-th group of second sequences in the N groups of second sequences by the coefficient group X(n), the method further includes:

[0197] Add a cyclic prefix CP of length Ncp to the N groups of second sequences; wherein Ncp is a natural number; the number of elements contained in the coefficient group X(n) is the sum of Ncp and M*s(n);

[0198] When Ncp is 0, it means that no CP is added to the second sequence.

[0199] In one embodiment, if the zero frequency position of the third sequence subjected to inverse Fourier transform is aligned with the zero frequency position of the receiving end demodulation corresponding to the first sequence, the phase sequence of each symbol frequency shift corresponding to the first sequence is the same;

[0200] If the zero frequency position of the third sequence subjected to inverse Fourier transform is not aligned with the zero frequency position of the receiving end demodulation corresponding to the first sequence, the phase sequence of the point multiplication of the continuous symbol frequency shifts corresponding to the first sequence is continuous;

[0201] The zero frequency position of the inverse Fourier transform of the third sequence is aligned with the zero frequency of the baseband at the transmitting end.

[0202] In one embodiment, at least part of the second sequence of phase compensation coefficient groups X(n) has the same phase between consecutive symbols in the time domain;

[0203] At least part of the second sequence of phase compensation coefficient groups X(n) has continuous phases between consecutive symbols in the time domain.

[0204] In one embodiment, the frequency domain operation of the time domain data carried by at least part of the subbands includes: a phase compensation coefficient group X1(n) with the same phase between consecutive symbols in the time domain; and a phase compensation coefficient group X2(n) with continuous phase between consecutive symbols in the time domain.

[0205] In one embodiment, if the frequency domain difference between the frequency domain position mapped by the data at the zero subcarrier position when the first sequence is subjected to inverse Fourier transform and the zero frequency position of the corresponding baseband is y(n), then the phase difference between adjacent elements of the phase sequence of the frequency domain point product is: mod(y(n),M*s(n)) / (M*s(n))*2π; wherein the unit of the frequency domain difference y(n) is the subcarrier spacing corresponding to the first-level inverse Fourier transform; the subcarrier spacing is the subcarrier spacing of the frequency domain subband corresponding to the first sequence;

[0206] The phase difference between adjacent elements of the phase sequence is: the difference between the phase of the next element in the phase sequence and the phase of the previous element is: mod(y(n),M*s(n)) / (M*s(n))*2π; where the zero frequency position of the baseband is the zero frequency position of the second-order inverse Fourier transform;

[0207] If the zero frequency position of the baseband is 0 Hz, the frequency domain difference y(n) is: the ratio between the subcarrier position mapped by the data at the zero subcarrier position of the first sequence subjected to inverse Fourier transform and the subcarrier spacing.

[0208] In one embodiment, if the frequency domain difference between the frequency domain position mapped by the data at the zero subcarrier position when the first sequence is subjected to inverse Fourier transform and the zero frequency position of the corresponding baseband is y(n), then the phase difference between adjacent elements of the phase sequence of the frequency domain dot product is: mod(y(n),M*s(n)*d(n)) / (M*s(n)*d(n))*2π; wherein d(n) is the subcarrier spacing corresponding to the frequency domain subband of the first sequence;

[0209] The phase difference between adjacent elements of the phase sequence is: the difference between the phase of the next element and the phase of the previous element in the phase sequence is: mod(y(n),M*s(n)*d(n)) / (M*s(n)*d(n))*2π; where the zero frequency position of the baseband is the zero frequency position of the second-order inverse Fourier transform;

[0210] If the zero frequency position of the baseband is 0 Hz, the frequency domain difference y(n) is: the ratio between the subcarrier position mapped by the data at the zero subcarrier position of the first sequence subjected to inverse Fourier transform and the subcarrier spacing.

[0211] In one embodiment, when the phase sequence multiplied by each symbol frequency shift is the same, the phase of the X(n) element corresponding to the first data in the second sequence without CP of each orthogonal frequency division multiplexing OFDM symbol is 0;

[0212] In the case where the phase sequence of each symbol frequency shift point-multiplied is continuous, the phase of the X(n) element corresponding to the first data in the second sequence without CP of the first OFDM symbol is 0.

[0213] In one embodiment, the phases between consecutive symbols of the coefficient group X(n) in the time domain are the same.

[0214] In one embodiment, the phases of the coefficient group X(n) between consecutive symbols in the time domain are the same, and X(n) corresponding to each consecutive symbol is the same.

[0215] In one embodiment, if the frequency domain zero subcarrier position corresponding to the nth group of first sequences is located on the last y(n) subcarriers of the zero frequency of the channel bandwidth, then the phase compensation coefficients of all symbols are Among them, 1:(M*s(n)+Ncp) is the serial number corresponding to the elements in the coefficient group X(n): 1, 2,...,(M*s(n)+Ncp); y(n) is a real number greater than or equal to 0; wherein the frequency domain zero subcarrier position corresponding to the first sequence is the frequency domain position in the channel bandwidth mapped to the data at the zero subcarrier position when the first sequence is inverse Fourier transformed.

[0216] In one embodiment, if the frequency domain zero subcarrier position corresponding to the nth group of first sequences is located on the first y(n) subcarriers of the zero frequency of the channel bandwidth, then the phase compensation coefficients of all symbols are Among them, 1:(M*s(n)+Ncp) is the serial number corresponding to the elements in the coefficient group X(n): 1, 2,...,(M*s(n)+Ncp); y(n) is a real number greater than or equal to 0; wherein the frequency domain zero subcarrier position corresponding to the first sequence is the frequency domain position in the channel bandwidth mapped to the data at the zero subcarrier position when the first sequence is inverse Fourier transformed.

[0217] In one embodiment, if the zero frequency of the channel bandwidth is at the frequency domain zero subcarrier position corresponding to the nth group of first sequences, the elements in X(n) of all symbols are 1, and the nth group of second sequences of all symbols are not multiplied by the coefficient group;

[0218] The phase of the element in X(n) corresponding to the first data in the second sequence of each OFDM symbol not including the CP is 0.

[0219] In one embodiment, the phase between consecutive symbols in the coefficient group X(n) in the time domain is continuous and changes at equal intervals; the X(n) corresponding to consecutive symbols in the time domain are different, and the phase differences between all adjacent elements in multiple continuous phase compensation coefficient groups X(n) corresponding to the consecutive symbols are the same.

[0220] In one embodiment, if the system zero frequency of the subband where the nth group of first sequences is located is on the y(n)th subcarriers after the baseband zero frequency position, and y(n) is a real number >=0, then X(n,m) of the mth symbol = exp(-2πj / M / s(n)*y(n)*([1:(M*s(n)+Ncp)]-Ncp-1+(m-1)*(M*s(n)+Ncp))).

[0221] In one embodiment, if the system zero frequency of the subband where the nth group of first sequences is located is on the first y(n) subcarriers of the baseband zero frequency position, and y(n) is a real number >=0, then X(n,m) of the mth symbol =ecp(2πj / M / s(n)*y(n)*([1:(M*s(n)+Ncp)]-Ncp-1+(m-1)*(M*s(n)+Ncp))).

[0222] In one embodiment, the number of data k(n) included in each group of first sequences satisfies one of the following conditions: an arbitrary positive integer; an integer multiple of a resource block RB; 2 to the power of i; the ratio of two adjacent k(n)s satisfies 2 to the power of i; k(n)s are all the same.

[0223] In one embodiment, a zero padding operation is performed on both ends of each group of first sequences, and [M*s(n)-k(n)] / 2 zero data are added to both ends of each group of first sequences.

[0224] In one embodiment, the number of points for inverse Fourier transform of each group of first sequences satisfies one of the following conditions: the ratio of the number of points for inverse Fourier transform of two adjacent groups of first sequences satisfies 2 to the power of i; the number of points for inverse Fourier transform of each group of first sequences is the same; wherein i is an integer.

[0225] In one embodiment, inverse Fourier transform is performed on N groups of third sequences to form a group of target time domain data sequences, including:

[0226] Performing frequency domain zero padding and cyclic shift operations on other P groups of initial frequency domain data sequences in turn to obtain other P groups of target frequency domain data sequences;

[0227] Perform inverse Fourier transform on the N groups of third sequences and the other P groups of target frequency domain data sequences to form a group of target time domain data sequences; wherein the other P groups of target frequency domain data sequences include: data after M times frequency domain oversampling, and data sequences not included in the data sequence generated by the data sequence to be transmitted.

[0228] In one embodiment, inverse Fourier transform is performed on N groups of third sequences to form a group of target time domain data sequences, including:

[0229] An oversampled inverse Fourier transform is performed on every N data, and every N data comes from N groups of third sequences.

[0230] In one embodiment, a set of target time domain data sequences is formed by serially linking multiple initial time domain data sequences generated by performing multiple inverse Fourier transforms on a third sequence; wherein the number of initial time domain data sequences is equal to the number of inverse Fourier transform operations.

[0231] In one embodiment, the process of generating an initial time domain data sequence by performing one inverse Fourier transform among multiple inverse Fourier transforms includes:

[0232] Extract N data from N groups of third sequences, the same number as the total number of groups in the first sequence;

[0233] An oversampled inverse Fourier transform is performed on the N data to obtain a corresponding initial time domain data sequence; wherein the N data come from N groups of third sequences respectively.

[0234] In one embodiment, the serial connection interval of the target time domain data sequence is 1 / M of the length after inverse Fourier transformation of the oversampled N target data.

[0235] In one embodiment, the process of generating multiple initial time domain data sequences by multiple inverse Fourier transforms includes:

[0236] For subbands with different subcarrier spacings, the length of the third sequence corresponding to the subband with the smallest subcarrier spacing is used as the reference length;

[0237] For the third sequence corresponding to the subband with non-minimum subcarrier spacing, select at least two groups of third sequences, concatenate them into sequences with the same length as the reference length, form new N groups of third sequences, perform multiple inverse Fourier transforms on the new N groups of third sequences, and obtain corresponding multiple initial time domain data sequences.

[0238] In one embodiment, each group of first sequences is transmitted in a corresponding frequency domain resource block; each frequency domain resource block includes Z subcarriers;

[0239] The number of data included in each group of the second sequence meets one of the following conditions: M*s(n); greater than or equal to M times the number of subcarriers included in each frequency domain resource block.

[0240] In one embodiment, the zero frequency position of the third sequence when performing an inverse Fourier transform operation is within the range of the corresponding frequency domain resource block;

[0241] The zero-frequency positions of different groups of third sequences when performing inverse Fourier transform operations are different.

[0242] In one embodiment, the zero frequency position during the inverse Fourier transform operation is located at one of the subcarriers included in each frequency domain resource block.

[0243] In one embodiment, the frequency domain resource blocks include: all frequency domain resource blocks in the channel bandwidth; some frequency domain resource blocks in the channel bandwidth;

[0244] The data to be transmitted includes: all the data to be transmitted in the channel bandwidth; and part of the data to be transmitted in the channel bandwidth.

[0245] In one embodiment, the data transmission method further includes:

[0246] A set of target time domain data sequences is filtered; wherein the filtering operation includes one of the following: single-phase filtering and multi-phase filtering.

[0247] In one embodiment, the filter function used in the polyphase filtering includes one of the following: a root raised cosine function; a raised cosine function; a rectangular function; an isotropic orthogonal transform algorithm IOTA function.

[0248] In one embodiment, the data transmission method further includes:

[0249] Perform windowing operation on a set of target time domain data series.

[0250] The data transmission device provided in this embodiment is configured to implement Figure 1 The data transmission method of the illustrated embodiment and the data transmission device provided in this embodiment have similar implementation principles and technical effects, which will not be described in detail here.

[0251] In one embodiment, Fig.15 Schematic diagram of the structure of a communication device provided in an embodiment of the present application. Fig.15 As shown, the device provided by the present application includes: a processor 1510, a memory 1520 and a communication module 1530. The number of processors 1510 in the device can be one or more. Fig.15 In the example, a processor 1510 is used. The number of memories 1520 in the device may be one or more. Fig.15A memory 1520 is taken as an example. The processor 1510, the memory 1520 and the communication module 1530 of the device can be connected via a bus or other means. Fig.15 In the embodiment, the communication device may be a base station side or a terminal side.

[0252] The memory 1520, as a computer-readable storage medium, can be configured to store software programs, computer executable programs and modules, such as program instructions / modules corresponding to the device of any embodiment of the present application (for example, the division module 1410, the first transformation module 1420, the first conversion module 1430, the second transformation module 1440 and the transmission module 1450 in the data transmission device). The memory 1520 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the device, etc. In addition, the memory 1520 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 1520 may further include a memory remotely arranged relative to the processor 1510, and these remote memories may be connected to the device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network and a combination thereof.

[0253] The communication device provided above can be configured to execute the data transmission method provided in any of the above embodiments, and has corresponding functions and effects.

[0254] An embodiment of the present application also provides a storage medium containing computer executable instructions, which, when executed by a computer processor, are used to execute a data transmission method, the method comprising: dividing the data to be transmitted into N groups of first sequences; wherein the nth group of first sequences contains k(n) data, k(n) is a positive integer; n=1, 2, ..., N; N is an integer greater than or equal to 2; performing inverse Fourier transform and frequency shift operations on each group of first sequences respectively to obtain a group of target time domain data sequences; and transmitting the target time domain data sequences on pre-configured time-frequency resources.

[0255] It will be appreciated by those skilled in the art that the term user equipment encompasses any suitable type of wireless user equipment, such as a mobile phone, a portable data processing device, a portable web browser or a car-mounted mobile station.

[0256] In general, various embodiments of the present application can be implemented in hardware or dedicated circuits, software, logic or any combination thereof. For example, some aspects can be implemented in hardware, while other aspects can be implemented in firmware or software that can be executed by a controller, microprocessor or other computing device, although the present application is not limited thereto.

[0257] Embodiments of the present application may be implemented by executing computer program instructions by a data processor of a mobile device, for example in a processor entity, or by hardware, or by a combination of software and hardware. The computer program instructions may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages.

[0258] The block diagram of any logic flow in the drawings of the present application may represent program steps, or may represent interconnected logic circuits, modules and functions, or may represent a combination of program steps and logic circuits, modules and functions. A computer program may be stored on a memory. The memory may have any type suitable for the local technical environment and may be implemented using any suitable data storage technology, such as but not limited to read-only memory (ROM), random access memory (RAM), optical memory devices and systems (digital versatile discs (DVD) or compact disks (CD)), etc. Computer-readable media may include non-transient storage media. A data processor may be any type suitable for the local technical environment, such as but not limited to a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FGPAs) and a processor based on a multi-core processor architecture.

[0259] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A data transmission method, characterized in that: include: Divide the data to be transmitted into N groups of first sequences; wherein the nth group of the first sequence contains k(n) data, k(n) is a positive integer; n=1, 2, ..., N; N is an integer greater than or equal to 2; Performing inverse Fourier transform on each group of the first sequences respectively to obtain N groups of second sequences; Performing a frequency shift operation on the N groups of second sequences to obtain N groups of third sequences; Performing inverse Fourier transform on the N groups of third sequences to form a group of target time domain data sequences; The target time domain data sequence is transmitted on preconfigured time-frequency resources.

2. The method according to claim 1, characterized in that The performing frequency shift operation on the N groups of second sequences to obtain N groups of third sequences includes: The nth group of second sequences in the N groups of second sequences are multiplied by the coefficient group X(n) to obtain N groups of third sequences; wherein n=1, 2, ..., N; and N is an integer greater than or equal to 2.

3. The method according to claim 2, characterized in that When all elements in X(n) are 1, the nth group of second sequences does not perform frequency shift operation.

4. The method according to claim 2, characterized in that: The elements contained in the coefficient group X(n) satisfy at least one of the following conditions: The modulus of each element is always 1; the coefficient group X(n) is a phase compensation coefficient group; the coefficient group X(n) is a phase sequence; X(n) is related to the zero-frequency position of the channel bandwidth and the frequency domain position corresponding to the first sequence of the nth group; the phase difference of adjacent elements is equal; the phase of each element increases or decreases at equal intervals.

5. The method according to claim 1, characterized in that The zero-frequency position of the channel bandwidth satisfies one of the following: the zero-frequency position of the baseband; the zero-frequency position when the inverse Fourier transform is performed on the N groups of third sequences.

6. The method according to claim 1, characterized in that Before performing inverse Fourier transform on each group of the first sequences to obtain N groups of second sequences, the method further includes: Performing zero padding operation on both ends of each group of the first sequences to obtain a zero-padded first sequence; wherein each group of the zero-padded first sequence contains M*s(n) data, where M is a positive integer; The number of points for performing inverse Fourier transform on each group of first sequences is M*s(n).

7. The method according to claim 1, characterized in that The channel bandwidth includes N sub-bands, and each sub-band corresponds to a group of first sequences.

8. The method according to claim 1, characterized in that In the case where a subcarrier in a subband is at the zero frequency position of the baseband, the second sequence formed by the first sequence corresponding to the subband does not perform a frequency shift operation.

9. The method according to claim 1, characterized in that: The system zero frequency position corresponding to at least some of the sub-bands is the same as the zero frequency position of the baseband; The system zero-frequency position corresponding to at least some of the sub-bands is different from the zero-frequency position of the baseband.

10. The method according to claim 1, characterized in that The system zero-frequency position corresponding to each sub-band is different from the frequency domain position to which the data at the zero-frequency position when the sub-band is subjected to inverse Fourier transform is mapped.

11. The method according to claim 1, characterized in that: The positions of zero subcarriers for inverse Fourier transform of data in different subbands with the same subcarrier spacing in the same system are the same within the subband.

12. The method according to claim 1, characterized in that The system in which the subband is located includes at least one of the following: LTE system, 5G NR system; 6G system.

13. The method according to claim 2, characterized in that Before multiplying the nth group of second sequences in the N groups of second sequences by the coefficient group X(n), the method further includes: Add a cyclic prefix CP of length Ncp to the N groups of second sequences; wherein Ncp is a natural number; the number of elements included in the coefficient group X(n) is the sum of Ncp and M*s(n); When the Ncp is 0, it means that no CP is added to the second sequence.

14. The method according to claim 1, characterized in that If the zero frequency position of the third sequence subjected to inverse Fourier transform is aligned with the zero frequency position of the receiving end demodulation corresponding to the first sequence, the phase sequence of each symbol frequency shift corresponding to the first sequence is the same; If the zero frequency position of the third sequence subjected to inverse Fourier transform is not aligned with the zero frequency position of the receiving end demodulation corresponding to the first sequence, the phase sequence of the point multiplication of the continuous symbol frequency shifts corresponding to the first sequence is continuous; The zero frequency position of the inverse Fourier transform of the third sequence is aligned with the zero frequency of the baseband at the transmitting end.

15. The method according to claim 2, characterized in that The phases of at least part of the second sequence of phase compensation coefficient groups X(n) between consecutive symbols in the time domain are the same; At least part of the second sequence of phase compensation coefficient groups X(n) has continuous phases between consecutive symbols in the time domain.

16. The method according to claim 2, characterized in that The frequency domain operation of the time domain data carried by at least part of the subbands includes: a phase compensation coefficient group X1(n) with the same phase between consecutive symbols in the time domain; and a phase compensation coefficient group X2(n) with continuous phase between consecutive symbols in the time domain.

17. The method according to claim 2, characterized in that If the frequency domain difference between the frequency domain position mapped by the data at the zero subcarrier position when the first sequence is subjected to inverse Fourier transform and the zero frequency position of the corresponding baseband is y(n), then the phase difference between adjacent elements of the phase sequence of the frequency domain point product is: mod(y(n),M*s(n)) / (M*s(n))*2π; wherein the unit of the frequency domain difference y(n) is the subcarrier spacing corresponding to the first-level inverse Fourier transform; and the subcarrier spacing is the subcarrier spacing of the frequency domain subband corresponding to the first sequence; The phase difference between adjacent elements of the phase sequence is: the difference between the phase of the next element in the phase sequence and the phase of the previous element is: mod(y(n),M*s(n)) / (M*s(n))*2π; wherein the zero frequency position of the baseband is the zero frequency position of the second-order inverse Fourier transform; If the zero frequency position of the baseband is 0 Hz, the frequency domain difference y(n) is: the ratio between the subcarrier position mapped by the data at the zero subcarrier position of the inverse Fourier transform of the first sequence and the subcarrier spacing.

18. The method according to claim 2, characterized in that If the frequency domain difference between the frequency domain position mapped by the data at the zero subcarrier position when the first sequence is subjected to inverse Fourier transform and the zero frequency position of the corresponding baseband is y(n), then the phase difference of adjacent elements of the phase sequence of the frequency domain point product is: mod(y(n),M*s(n)*d(n)) / (M*s(n)*d(n))*2π; wherein d(n) is the subcarrier spacing corresponding to the frequency domain subband of the first sequence; The phase difference between adjacent elements of the phase sequence is: the difference between the phase of the latter element and the phase of the former element in the phase sequence is: mod(y(n),M*s(n)*d(n)) / (M*s(n)*d(n))*2π; wherein the zero frequency position of the baseband is the zero frequency position of the second-order inverse Fourier transform; If the zero frequency position of the baseband is 0 Hz, the frequency domain difference y(n) is: the ratio between the subcarrier position mapped by the data at the zero subcarrier position of the inverse Fourier transform of the first sequence and the subcarrier spacing.

19. The method according to claim 2, characterized in that When the phase sequence of each symbol frequency shift is the same, the phase of the X(n) element corresponding to the first data in the second sequence without CP of each orthogonal frequency division multiplexing OFDM symbol is 0; In the case where the phase sequence of each symbol frequency shift point-multiplied is continuous, the phase of the X(n) element corresponding to the first data in the second sequence without CP of the first OFDM symbol is 0.

20. The method according to claim 2, characterized in that The phases of the coefficient group X(n) between consecutive symbols in the time domain are the same.

21. The method according to claim 2, characterized in that The phases of the coefficient group X(n) between consecutive symbols in the time domain are the same, and X(n) corresponding to each consecutive symbol is the same.

22. The method according to claim 2, characterized in that If the frequency domain zero subcarrier position corresponding to the nth group of first sequences is on the last y(n) subcarriers of the zero frequency of the channel bandwidth, then the phase compensation coefficient group of all symbols is Among them, 1:(M*s(n)+Ncp) is the serial number corresponding to the element in the coefficient group X(n): 1, 2,...,(M*s(n)+Ncp); y(n) is a real number greater than or equal to 0; wherein the frequency domain zero subcarrier position corresponding to the first sequence is the frequency domain position in the channel bandwidth mapped to the data at the zero subcarrier position when the first sequence is inverse Fourier transformed.

23. The method according to claim 2, characterized in that If the frequency domain zero subcarrier position corresponding to the nth group of first sequences is on the first y(n) subcarriers of the zero frequency of the channel bandwidth, then the phase compensation coefficient group of all symbols is Among them, 1:(M*s(n)+Ncp) is the serial number corresponding to the element in the coefficient group X(n): 1, 2,...,(M*s(n)+Ncp); y(n) is a real number greater than or equal to 0; wherein the frequency domain zero subcarrier position corresponding to the first sequence is the frequency domain position in the channel bandwidth mapped to the data at the zero subcarrier position when the first sequence is inverse Fourier transformed.

24. The method according to claim 2, characterized in that If the zero frequency of the channel bandwidth is at the zero subcarrier position in the frequency domain corresponding to the nth group of first sequences, then the elements in X(n) of all symbols are 1, and the nth group of second sequences of all symbols are not multiplied by the coefficient group; The phase of the element in X(n) corresponding to the first data in the second sequence of each OFDM symbol not including the CP is 0.

25. The method according to claim 2, characterized in that The phase between consecutive symbols in the coefficient group X(n) in the time domain is continuous and changes at equal intervals; the X(n) corresponding to consecutive symbols in the time domain are different, and the phase differences between all adjacent elements in multiple continuous phase compensation coefficient groups X(n) corresponding to continuous symbols are the same.

26. The method according to claim 2, characterized in that If the system zero frequency of the subband where the first sequence of the nth group is located is on the y(n)th subcarriers after the baseband zero frequency position, and y(n) is a real number >= 0, then X(n,m) of the mth symbol = exp(-2πj / M / s(n)*y(n)*([1:(M*s(n)+Ncp)]-Ncp-1+(m-1)*(M*s(n)+Ncp))).

27. The method according to claim 1, characterized in that If the system zero frequency of the subband where the first sequence of the nth group is located is on the first y(n) subcarriers of the baseband zero frequency position, and y(n) is a real number >= 0, then X(n,m) of the mth symbol = exp(2πj / M / s(n)*y(n)*([1:(M*n(n)+Ncp)]-Ncp-1+(m-1)*(M*s(n)+Ncp))).

28. The method according to claim 1, characterized in that The performing inverse Fourier transform on the N groups of third sequences to form a group of target time domain data sequences includes: Performing frequency domain zero padding and cyclic shift operations on other P groups of initial frequency domain data sequences in sequence to obtain other P groups of target frequency domain data sequences; Perform inverse Fourier transform on the N groups of third sequences and the other P groups of target frequency domain data sequences to form a group of target time domain data sequences; wherein the other P groups of target frequency domain data sequences include: data after M times frequency domain oversampling, and data sequences not included in the data sequence generated by the data sequence to be transmitted.

29. The method according to claim 1, characterized in that The set of target time domain data sequences is formed by serially linking a plurality of initial time domain data sequences generated by performing multiple inverse Fourier transforms on the third sequence; wherein the number of the initial time domain data sequences is equal to the number of inverse Fourier transform operations.

30. The method according to claim 29, characterized in that The process of generating an initial time domain data sequence by performing one inverse Fourier transform among the multiple inverse Fourier transforms includes: Extracting N data from N groups of third sequences, the same number as the total number of groups of the first sequence; An oversampled inverse Fourier transform is performed on the N data to obtain a corresponding initial time domain data sequence; wherein the N data are respectively from N groups of third sequences.

31. The method according to claim 29, characterized in that The serial connection interval of the target time domain data sequence is 1 / M of the length after the inverse Fourier transform of the oversampled N target data.

32. The method according to claim 29, characterized in that The process of generating multiple initial time domain data sequences by multiple inverse Fourier transforms includes: For subbands with different subcarrier spacings, the length of the third sequence corresponding to the subband with the smallest subcarrier spacing is used as the reference length; For the third sequence corresponding to the subband with non-minimum subcarrier spacing, select at least two groups of third sequences, concatenate them into sequences with the same length as the reference length, form new N groups of third sequences, perform multiple inverse Fourier transforms on the new N groups of third sequences, and obtain corresponding multiple initial time domain data sequences.

33. The method according to claim 1, characterized in that Each group of first sequences is transmitted in a corresponding frequency domain resource block; each frequency domain resource block includes Z subcarriers; The number of data included in each group of the second sequence meets one of the following conditions: M*s(n); greater than or equal to M times the number of subcarriers included in each frequency domain resource block.

34. A communication device, characterized in that: include: memory, and one or more processors; The memory is configured to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method as described in any one of claims 1 to 33.

35. A storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 33 is implemented.

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