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 channel bandwidth comprises N sub-bands, and each sub-band corresponds to a group of first sequences; the nth group of 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 frequency shift operation on the first sequence corresponding to each sub-band on the channel bandwidth to obtain N groups of second sequences; performing inverse Fourier transform on the group of second sequences corresponding to each sub-band to obtain 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 channel bandwidth includes N subbands, and each subband corresponds to a group of first sequences; the nth group of the first sequences includes 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 frequency shift operations on the first sequences corresponding to each subband on the channel bandwidth to obtain N groups of second sequences;

[0007] Performing inverse Fourier transform on a set of second sequences corresponding to each sub-band respectively to obtain a set of target time domain data sequences;

[0008] The target time domain data sequence is transmitted on preconfigured time-frequency resources.

[0009] An embodiment of the present application provides a communication device, including: a memory, and one or more processors;

[0010] The memory is configured to store one or more programs;

[0011] 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.

[0012] 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

[0013] Figure 1 is a flow chart of a data transmission method provided in an embodiment of the present application;

[0014] Figure 2 It is a schematic diagram of generating a target time domain data sequence provided by an embodiment of the present application;

[0015] Figure 3 is a schematic diagram of generating another target time domain data sequence provided by an embodiment of the present application;

[0016] Figure 4 This is another schematic diagram of generating a target time domain data sequence provided by an embodiment of the present application;

[0017] Figure 5 This is a schematic diagram of generating another target time domain data sequence provided in an embodiment of the present application;

[0018] Figure 6 This is a schematic diagram of generating another target time domain data sequence provided in an embodiment of the present application;

[0019] Figure 7 This is a schematic diagram of generating another target time domain data sequence provided in an embodiment of the present application;

[0020] Figure 8 is a transmission schematic diagram of data to be transmitted provided in an embodiment of the present application;

[0021] Fig. 9 is a structural block diagram of a data transmission device provided in an embodiment of the present application;

[0022] Fig.10 It is a structural diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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-S140.

[0028] S110, dividing the data to be transmitted into N groups of first sequences.

[0029] The channel bandwidth includes N subbands, each subband corresponds to a group of first sequences; the nth group of first sequences includes 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; or the data to be transmitted can be Fourier transformed first, and then the frequency domain data obtained by Fourier transform is divided to obtain the corresponding N groups of first sequences.

[0030] S120 , performing frequency shift operation on the first sequence corresponding to each subband on the channel bandwidth to obtain N groups of second sequences.

[0031] Before performing inverse Fourier transform on the first sequence corresponding to each subband, a frequency shift operation is first performed on the first sequence to obtain the corresponding N groups of second sequences. The correct position for performing the first-order inverse Fourier transform can be adjusted by using the data corresponding to the first sequence on the frequency shift subband. The first-order inverse Fourier transform refers to the inverse Fourier transform operation performed on the second sequence.

[0032] S130 , respectively perform inverse Fourier transform on a group of second sequences corresponding to each subband to obtain a group of target time domain data sequences.

[0033] In one example, each group of second sequences is first subjected to inverse Fourier transform to form a corresponding third sequence; and then N groups of third sequences are subjected to inverse Fourier transform to obtain a corresponding group of target time-domain data sequences.

[0034] S140. Transmit a target time domain data sequence on pre-configured time-frequency resources.

[0035] In one embodiment, the process of performing a frequency shift operation on the first sequence corresponding to each sub-band on the channel bandwidth includes: frequency shifting data included in the first sequence on each sub-band to a sub-band containing a baseband zero frequency.

[0036] In one embodiment, frequency shifting the data included in the first sequence on each subband to a subband containing a baseband zero frequency includes: making the data at the zero frequency position when the data of each subband is subjected to inverse Fourier transform be at the zero frequency of the baseband. In one example, frequency shifting the data of N subbands on the channel bandwidth is respectively performed, which is to frequency shift the data of each subband to a subband containing a baseband zero frequency; in one example, frequency shifting the data of each subband to a subband containing a baseband zero frequency is to make the data at the zero frequency position when the data of each subband is subjected to inverse Fourier transform be at the zero frequency of the baseband. By frequency shifting each subband to a subband containing a baseband zero frequency, the position of each subband subjected to the first-order inverse Fourier transform can be made the same, so that the subband positions are aligned.

[0037] In one embodiment, the frequency shift amount of each data included in the first sequence corresponding to a sub-band is the same. In one example, when the data of each sub-band is frequency-shifted to a sub-band containing a baseband zero frequency, the frequency shift amount of each data on the sub-band can be configured to be equal, which can ensure that the order of data in each sub-band remains unchanged.

[0038] In one embodiment, the frequency shift amounts of data included in the first sequences corresponding to different sub-bands are different.

[0039] In one embodiment, when a subcarrier in a subband is at the zero frequency position of the baseband, the data of the subband is not subjected to a frequency shift operation.

[0040] In one embodiment, when the widths of the N sub-bands are the same, the frequency shift amount of each data in the first sequence is an integer multiple of the width of one sub-band. When the widths of the N sub-bands are the same, the frequency shift amount of the frequency shift operation performed on the first sequence is an integer multiple of the width of one sub-band, that is, the data of the first sequence corresponding to other sub-bands can be frequency shifted to the sub-band containing the baseband zero frequency.

[0041] In one embodiment, the widths of the N sub-bands are different. In the case where the widths of the N sub-bands are different, sub-band frequency shifting can also be performed.

[0042] In one embodiment, the zero frequency position of the baseband is the zero frequency position of the channel bandwidth.

[0043] 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; the system zero frequency position corresponding to at least some of the sub-bands is different from the zero frequency position of the baseband. The system zero frequency position corresponding to some sub-bands is the same as the zero frequency position of the baseband, and the system zero frequency position corresponding to some sub-bands is different from the zero frequency position of the baseband.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] In one embodiment, a set of second sequences corresponding to each subband is subjected to inverse Fourier transform to obtain a set of target time domain data sequences, including:

[0048] Perform inverse Fourier transform on a group of second sequences corresponding to each subband to obtain N groups of third sequences;

[0049] Perform inverse Fourier transform on the N groups of third sequences to obtain a group of target time domain data sequences.

[0050] In one embodiment, before performing inverse Fourier transform on a group of second sequences corresponding to each subband respectively, the method further includes:

[0051] Perform zero padding operation on both ends of each group of second sequences to obtain a zero-padded second sequence; wherein each group of the zero-padded second sequence contains M*s(n) data, where M is a positive integer;

[0052] The number of points for performing inverse Fourier transform on each group of second sequences is M*s(n).

[0053] In one embodiment, before performing inverse Fourier transform on the N groups of third sequences, the method further includes:

[0054] Adding a cyclic prefix CP with a length of Ncp to N groups of third sequences; wherein Ncp is a natural number;

[0055] When Ncp is 0, it means that no CP is added to the third sequence.

[0056] In one embodiment, before performing inverse Fourier transform on the N groups of third sequences, the method further includes:

[0057] A frequency shift operation is performed on the N groups of third sequences.

[0058] 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.

[0059] In one embodiment, a zero padding operation is performed on both ends of each group of second sequences, and [M*s(n)-k(n)] / 2 zero data are added to both ends of each group of second sequences.

[0060] In one embodiment, the number of points for inverse Fourier transform of each group of second sequences satisfies one of the following conditions: the ratio of the number of points for inverse Fourier transform of two adjacent groups of second sequences satisfies 2 to the power of i; the number of points for inverse Fourier transform of each group of second 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.

[0061] 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.

[0062] In one embodiment, multiple inverse Fourier transforms are performed on N groups of third sequences to form a group of target time domain data sequences, including:

[0063] 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;

[0064] 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.

[0065] In one embodiment, the number of points of performing multiple inverse Fourier transforms on the N groups of third sequences is greater than N; and the number of points of each inverse Fourier transform in the multiple inverse Fourier transforms is greater than or equal to M.

[0066] In one embodiment, the process of multiple inverse Fourier transforms includes: for subbands with different subcarrier spacings, taking the length of the second sequence corresponding to the subband with the minimum subcarrier spacing as the reference length; for the second sequence corresponding to the subband with non-minimum subcarrier spacing, selecting at least two groups of second sequences, serially connecting them to form a sequence with the same length as the reference length, forming a new N groups of second sequences, and performing multiple inverse Fourier transforms on the new N groups of second sequences. Wherein, the subbands with different subcarrier spacings represent first sequences with different numbers of data.

[0067] 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:

[0068] 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.

[0069] 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.

[0070] 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).

[0071] 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.

[0072] In one embodiment, the zero frequency position of the second 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 second 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).

[0073] 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.

[0074] 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;

[0075] 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.

[0076] 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.

[0077] 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.

[0078] In one embodiment, the data transmission method further includes: performing a windowing operation on a set of target time domain data sequences.

[0079] Example 1

[0080] In one example, Figure 2 This is a 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 12, the subcarrier spacing as the same, and the shaded part as the subcarrier position of the first group of data as an example.

[0081] like Figure 2 As shown, in this embodiment, the data to be transmitted is divided into 4 groups of first sequences, each group of first sequences contains 12 data, and the subcarrier spacing is the same, wherein Figure 2 The shaded part in the middle is the subcarrier position of the first group of data.

[0082] When processing the first set of data, first align the zero frequency of the Fourier transform of the first set of data with the zero frequency of the baseband. Assuming that the zero frequency of the Fourier transform of the first set of data has been aligned with the zero frequency of the baseband, this operation is not performed, that is, the first sequence is the same as the second sequence; 10 0 subcarriers are added to both ends of the second sequence corresponding to the first set of data to form a second sequence with a length of 32 points after zero padding, and then a 32-point inverse Fourier transform (first-level IFFT) is performed on the second sequence after zero padding to obtain the corresponding third sequence; frequency shift operation is also performed on the other three sets of data. Then, CP is added to the four sets of third sequences, and after the frequency shift operation, a subband-level inverse Fourier transform (second-level IFFT) and multi-phase filtering operation are performed to form a set of target time domain data sequences. A set of target time domain data sequences is transmitted on the time-frequency resources.

[0083] Example 2

[0084] 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 12, the subcarrier spacing as the same, and the shaded part as the subcarrier position of the second group of data as an example.

[0085] like Figure 3As shown, in this embodiment, the data to be transmitted is divided into 4 groups of first sequences, each group of first sequences contains 12 data, and the subcarrier spacing is the same, wherein Figure 3 The shaded part in is the subcarrier position of the second group of data.

[0086] When processing the second group of data, first align the zero frequency of the inverse Fourier transform of the second group of data with the zero frequency of the baseband to obtain the corresponding second sequence; wherein the frequency shift amount is one times the subband width, i.e., 12 subcarrier intervals, and the position of the zero frequency of the Fourier transform of the second group of data in the second group is the same as the position of the zero frequency of the Fourier transform of the first group of data in the first group; 10 0 subcarriers are added to both ends of the second sequence corresponding to the second group of data to form a second sequence with a length of 32 points after zero padding, and then a 32-point inverse Fourier transform (first-level IFFT) is performed on the second sequence after zero padding to obtain the corresponding third sequence; frequency shift operation is also performed on the other three groups of data. Then, CP is added to the four groups of third sequences, and after the frequency shift operation, a subband-level inverse Fourier transform (second-level IFFT) and multi-phase filtering operation are performed to form a group of target time domain data sequences. A group of target time domain data sequences are transmitted on time-frequency resources.

[0087] Example 3

[0088] In one example, Figure 4 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 12, the subcarrier spacing as the same, and the shaded part as the subcarrier position of the third group of data as an example.

[0089] like Figure 4 As shown, in this embodiment, the data to be transmitted is divided into 4 groups of first sequences, each group of first sequences contains 12 data, and the subcarrier spacing is the same, wherein Figure 3 The shaded part in is the subcarrier position of the third group of data.

[0090] When processing the third group of data, first align the zero frequency of the inverse Fourier transform of the third group of data with the zero frequency of the baseband to obtain the corresponding second sequence; wherein, the zero frequency of the system where the third group of data is located is different from the zero frequency of the baseband, and the zero frequency of the inverse Fourier transform of the third group of data is in the same position as the zero frequency of the system where it is located, and the data of subband 3 is frequency shifted to the position where the zero frequency of the inverse Fourier transform of subband 3 and the zero frequency of the baseband are aligned, and the frequency shift amount is 34 subcarrier intervals; 8 and 12 0 subcarriers are added to both ends of the second sequence corresponding to the third group of data, respectively, to form a second sequence with a length of 32 points after zero padding, and then a 32-point inverse Fourier transform (first-level IFFT) is performed on the second sequence after zero padding to obtain the corresponding third sequence; frequency shift operation is also performed on the other 3 groups of data. Then, CP is added to the 4 groups of third sequences, and after the frequency shift operation, a subband-level inverse Fourier transform (second-level IFFT) and multi-phase filtering operation are performed to form a group of target time domain data sequences. A group of target time domain data sequences are transmitted on time-frequency resources.

[0091] Example 4

[0092] 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 number of groups N of the first sequence is 4, the number of data contained in the first three groups of the first sequence is the same, all 12, the number of data contained in the fourth group of the first sequence is 6, and the subcarrier spacing is different, the first three groups of subcarrier spacing is 15kHz, the fourth group of subcarrier spacing is 30kHz, and the shaded part is the subcarrier position of the fourth group of data as an example, the generation process of the target time domain data sequence is described.

[0093] like Figure 5 As shown, in this embodiment, the data to be transmitted is divided into 4 groups of first sequences, each of the first three groups of first sequences contains 12 data, and the fourth group of first sequences contains 6 data, and the subcarrier spacing is different. The subcarrier spacing of the first three groups is 15kHz, and the subcarrier spacing of the fourth group is 15kHz, where Figure 5 The shaded part in is the subcarrier position of the fourth group of data.

[0094] When processing the fourth group of data, the zero frequency of the inverse Fourier transform of the fourth group of data is first aligned with the zero frequency of the baseband to obtain the corresponding second sequence; wherein the frequency shift amount is 1 times the subband width, that is, 6 30kHz subcarrier number intervals, wherein the zero frequency of the Fourier transform of the fourth group of data is on the third subcarrier;

[0095] Add 5 zero subcarriers to both ends of the second sequence corresponding to the fourth group of data to form a second sequence with a length of 16 points after zero padding, and then perform a 16-point inverse Fourier transform (first-level IFFT) on the second sequence after zero padding to obtain the corresponding third sequence; frequency shift operation is also performed on the other 3 groups of data. Then, add CP to the 4 groups of third sequences, and after frequency shift operation, concatenate two consecutive symbol data of the fourth group of data to form data of the same length as the first, second, and third groups of data, and then perform subband-level inverse Fourier transform (second-level IFFT) and multi-phase filtering operations to form a group of target time domain data sequences. Transmit a group of target time domain data sequences on time-frequency resources.

[0096] Example 5

[0097] 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 number of groups N of the first sequence is 4, the number of data contained in the first three groups of the first sequence is the same, all 12, the number of data contained in the fourth group of the first sequence is 6, and the subcarrier spacing is different, the first three groups of subcarrier spacing is 15kHz, the fourth group of subcarrier spacing is 30kHz, and the shaded part is the subcarrier position of the fourth group of data as an example, the generation process of the target time domain data sequence is described.

[0098] like Figure 6 As shown, in this embodiment, the data to be transmitted is divided into 4 groups of first sequences, each of the first three groups of first sequences contains 12 data, and the fourth group of first sequences contains 6 data, and the subcarrier spacing is different. The subcarrier spacing of the first three groups is 15kHz, and the subcarrier spacing of the fourth group is 30kHz, where Figure 6 The shaded part in is the subcarrier position of the fourth group of data.

[0099] When processing the fourth group of data, the zero frequency of the inverse Fourier transform of the fourth group of data is first aligned with the zero frequency of the baseband to obtain the corresponding second sequence; wherein the frequency shift amount is 18 subcarrier intervals of 30 kHz, wherein the zero frequency of the Fourier transform of the fourth group of data is on the second subcarrier;

[0100] Add 6 and 4 0 subcarriers to both ends of the second sequence corresponding to the fourth group of data to form a second sequence with a length of 16 points after zero padding, and then perform a 16-point inverse Fourier transform (first-level IFFT) on the second sequence after zero padding to obtain the corresponding third sequence; frequency shift operation is also performed on the other 3 groups of data. Then, add CP to the 4 groups of third sequences, and after frequency shift operation, concatenate two consecutive symbol data of the fourth group of data to form data of the same length as the first, second, and third groups of data, and then perform subband-level inverse Fourier transform (second-level IFFT) and multi-phase filtering operations to form a group of target time domain data sequences. Transmit a group of target time domain data sequences on time-frequency resources.

[0101] Example 6

[0102] In one example, Figure 7 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 3, the number of data contained in each group of the first sequence being the same, which is 12, and the subcarrier spacing being the same, and the shaded part being the subcarrier position of the 1st, 2nd and 3rd groups of data as an example.

[0103] like Figure 7 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, and the subcarrier spacing is the same, wherein Figure 7 The shaded parts in the figure are the subcarrier positions of the 1st, 2nd and 3rd groups of data from top to bottom.

[0104] Align the zero frequency of the inverse Fourier transform of the first group of data with the zero frequency of the baseband to obtain a corresponding second sequence; wherein the frequency shift is twice the subband width, i.e., 24 subcarrier intervals, wherein the position of the zero frequency of the Fourier transform of the first group of data in the first group is the same as the position of the zero frequency of the Fourier transform of the third group of data in the third group;

[0105] Aligning the zero frequency of the inverse Fourier transform of the second group of data with the zero frequency of the baseband to obtain a corresponding second sequence; wherein the frequency shift amount is 1 times the subband width, i.e., 12 subcarrier intervals, wherein the position of the zero frequency of the Fourier transform of the second group of data in the second group is the same as the position of the zero frequency of the Fourier transform of the third group of data in the third group;

[0106] The frequency shift amounts of different groups of data are different and are all integer multiples of the sub-band width.

[0107] Assuming that the zero frequency of the Fourier transform of the third set of data is aligned with the zero frequency of the baseband, no frequency shift operation is performed, that is, the first sequence and the second sequence corresponding to the third set of data are the same;

[0108] Add 10 zero subcarriers at both ends of the second sequence corresponding to the 1st, 2nd, and 3rd data groups to form a 32-point zero-padded second sequence, and then perform a 32-point inverse Fourier transform (first-level IFFT) on the zero-padded second sequence to obtain the corresponding third sequence. Then, add CP to the three data sequences, perform frequency shift operations, perform subband-level inverse Fourier transform (second-level IFFT) and multi-phase filtering operations to form a set of target time domain data sequences. Transmit a set of target time domain data sequences on time-frequency resources.

[0109] Example 7

[0110] In one example, Figure 8 Schematic diagram of a transmission of data to be transmitted provided by an embodiment of the present application. Figure 8 As shown, the target time domain data sequence corresponding to the data to be transmitted is windowed or filtered in turn; then the DAC and RF processes are performed.

[0111] like Figure 8 As shown, transmitting a target time domain data sequence corresponding to a set of data sequences to be transmitted also includes windowing or filtering the target time domain data sequence corresponding to the data sequences to be transmitted, and then performing DAC and RF processes.

[0112] 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.

[0113] 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.

[0114] In one embodiment, Fig. 9 is a structural block diagram of a data transmission device provided in an embodiment of the present application. Fig. 9 As shown, the data transmission device in this embodiment includes: a division module 910, a first conversion module 920, a first transformation module 930 and a transmission module 940.

[0115] The division module 910 is configured to divide the data to be transmitted into N groups of first sequences.

[0116] The channel bandwidth includes N subbands, each subband corresponds to a group of first sequences; the nth group of first sequences includes k(n) data, k(n) is a positive integer; n=1, 2, ..., N; N is an integer greater than or equal to 2.

[0117] The first conversion module 920 is configured to perform a frequency shift operation on the first sequence corresponding to each sub-band on the channel bandwidth to obtain N groups of second sequences.

[0118] The first transform module 930 is configured to perform inverse Fourier transform on a group of second sequences corresponding to each sub-band to obtain a group of target time domain data sequences.

[0119] The transmission module 940 is configured to transmit the target time domain data sequence on the pre-configured time-frequency resources.

[0120] In one embodiment, the process of performing a frequency shift operation on the first sequence corresponding to each sub-band on the channel bandwidth includes: frequency shifting data included in the first sequence on each sub-band to a sub-band containing a baseband zero frequency.

[0121] In one embodiment, frequency shifting the data included in the first sequence on each subband to a subband containing a baseband zero frequency includes: performing an inverse Fourier transform on the data of each subband so that the data at the zero frequency position is at the baseband zero frequency.

[0122] In one embodiment, the frequency shift amount of each data included in the first sequence corresponding to one sub-band is the same.

[0123] In one embodiment, the frequency shift amounts of data included in the first sequences corresponding to different sub-bands are different.

[0124] In one embodiment, when a subcarrier in a subband is at the zero frequency position of the baseband, the data of the subband is not subjected to a frequency shift operation.

[0125] In one embodiment, when the widths of the N sub-bands are the same, the frequency shift amount of each data in the first sequence is an integer multiple of the width of one sub-band.

[0126] In one embodiment, the widths of the N sub-bands are different.

[0127] In one embodiment, the zero frequency position of the baseband is the zero frequency position of the channel bandwidth.

[0128] 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;

[0129] The system zero-frequency position corresponding to at least some of the sub-bands is different from the zero-frequency position of the baseband.

[0130] 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.

[0131] 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.

[0132] 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.

[0133] In one embodiment, a set of second sequences corresponding to each subband is subjected to inverse Fourier transform to obtain a set of target time domain data sequences, including:

[0134] Perform inverse Fourier transform on a group of second sequences corresponding to each subband to obtain N groups of third sequences;

[0135] Perform inverse Fourier transform on the N groups of third sequences to obtain a group of target time domain data sequences.

[0136] In one embodiment, before performing inverse Fourier transform on a group of second sequences corresponding to each subband respectively, the method further includes:

[0137] Perform zero padding operation on both ends of each group of second sequences to obtain a zero-padded second sequence; wherein each group of the zero-padded second sequence contains M*s(n) data, where M is a positive integer;

[0138] The number of points for performing inverse Fourier transform on each group of second sequences is M*s(n).

[0139] In one embodiment, before performing inverse Fourier transform on the N groups of third sequences, the method further includes:

[0140] Adding a cyclic prefix CP with a length of Ncp to N groups of third sequences; wherein Ncp is a natural number;

[0141] When Ncp is 0, it means that no CP is added to the third sequence.

[0142] In one embodiment, before performing inverse Fourier transform on the N groups of third sequences, the method further includes:

[0143] A frequency shift operation is performed on the N groups of third sequences.

[0144] 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.

[0145] In one embodiment, a zero padding operation is performed on both ends of each group of second sequences, and [M*s(n)-k(n)] / 2 zero data are added to both ends of each group of second sequences.

[0146] In one embodiment, the number of points for inverse Fourier transform of each group of second sequences satisfies one of the following conditions: the ratio of the number of points for inverse Fourier transform of two adjacent groups of second sequences satisfies 2 to the power of i; the number of points for inverse Fourier transform of each group of second sequences is the same; wherein i is an integer.

[0147] In one embodiment, multiple inverse Fourier transforms are performed on N groups of third sequences to form a group of target time domain data sequences, including:

[0148] 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;

[0149] 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.

[0150] In one embodiment, the number of points of performing multiple inverse Fourier transforms on the N groups of third sequences is greater than N; and the number of points of each inverse Fourier transform in the multiple inverse Fourier transforms is greater than or equal to M.

[0151] In one embodiment, the process of multiple inverse Fourier transforms includes:

[0152] For subbands with different subcarrier spacings, the length of the second sequence corresponding to the subband with the smallest subcarrier spacing is used as the reference length;

[0153] For the second sequences corresponding to the subbands with non-minimum subcarrier spacing, at least two groups of second sequences are selected, connected in series to form sequences with the same length as the reference length, forming new N groups of second sequences, and multiple inverse Fourier transforms are performed on the new N groups of second sequences.

[0154] 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:

[0155] An oversampled inverse Fourier transform is performed on every N data, and every N data comes from N groups of third sequences.

[0156] 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.

[0157] 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:

[0158] Extract N data from the N groups of the third sequence, the same number as the total number of groups in the first sequence;

[0159] 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.

[0160] 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;

[0161] 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.

[0162] In one embodiment, the zero frequency position of the second sequence when performing an inverse Fourier transform operation is within the range of the corresponding frequency domain resource block;

[0163] The zero-frequency positions of different groups of second sequences when performing inverse Fourier transform operations are different.

[0164] 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.

[0165] 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;

[0166] 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.

[0167] In one embodiment, the data transmission device further includes:

[0168] A filter is configured to filter a set of target time domain data sequences; wherein the filtering operation includes one of the following: single-phase filtering and multi-phase filtering.

[0169] 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.

[0170] In one embodiment, the data transmission device further includes:

[0171] The windowing module is configured to perform a windowing operation on a set of target time domain data sequences.

[0172] 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.

[0173] In one embodiment, Fig.10 Schematic diagram of a communication device provided in an embodiment of the present application. Fig.10 As shown, the device provided by the present application includes: a processor 1010, a memory 1020 and a communication module 1030. The number of processors 1010 in the device can be one or more. Fig.10In the example, a processor 1010 is used. The number of memories 1020 in the device may be one or more. Fig.10 A memory 1020 is taken as an example. The processor 1010, the memory 1020 and the communication module 1030 of the device can be connected via a bus or other means. Fig.10 In the embodiment, the communication device may be a base station side or a terminal side.

[0174] The memory 1020, as a computer-readable storage medium, may 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 (e.g., the division module 910, the first conversion module 920, the first transformation module 930, and the transmission module 940 in the data transmission device). The memory 1020 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 1020 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 1020 may further include a memory remotely arranged relative to the processor 1010, 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 combinations thereof.

[0175] The above-provided device can be configured to execute the data transmission method provided by any of the above-provided embodiments, and has corresponding functions and effects.

[0176] An embodiment of the present application also provides a storage medium containing computer executable instructions, which are used to execute a data transmission method when executed by a computer processor. The method includes: dividing the data to be transmitted into N groups of first sequences; wherein the channel bandwidth includes N sub-bands, and each sub-band corresponds to a group of first sequences; the nth group of first sequences includes k(n) data, k(n) is a positive integer; n=1, 2, ..., N; N is an integer greater than or equal to 2; performing frequency shift operations on the first sequences corresponding to each sub-band on the channel bandwidth to obtain N groups of second sequences; performing inverse Fourier transform on a group of second sequences corresponding to each sub-band to obtain a group of target time domain data sequences; and transmitting the target time domain data sequences on pre-configured time-frequency resources.

[0177] 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.

[0178] 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.

[0179] 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.

[0180] 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.

[0181] 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 channel bandwidth includes N subbands, and each subband corresponds to a group of first sequences; the nth group of the first sequences includes k(n) data, k(n) is a positive integer; n=1, 2, ..., N; N is an integer greater than or equal to 2; Performing frequency shift operations on the first sequences corresponding to each subband on the channel bandwidth to obtain N groups of second sequences; Performing inverse Fourier transform on a set of second sequences corresponding to each sub-band respectively to obtain a set 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 process of performing frequency shift operation on the first sequence corresponding to each sub-band on the channel bandwidth includes: frequency shifting the data contained in the first sequence on each sub-band to a sub-band containing a baseband zero frequency.

3. The method according to claim 2, characterized in that The frequency shifting of the data included in the first sequence on each sub-band to the sub-band containing the baseband zero frequency includes: performing inverse Fourier transform on the data of each sub-band so that the data at the zero frequency position is at the baseband zero frequency.

4. The method according to claim 1, characterized in that: The frequency shift amount of each data included in the first sequence corresponding to one sub-band is the same.

5. The method according to claim 1, characterized in that The frequency shift amounts of data included in the first sequences corresponding to different sub-bands are different.

6. The method according to claim 1, characterized in that When a subcarrier in a subband is at the zero frequency position of the baseband, the data of the subband is not subjected to a frequency shift operation.

7. The method according to claim 1, characterized in that When the widths of the N sub-bands are the same, the frequency shift amount of each data in the first sequence is an integer multiple of the width of one sub-band.

8. The method according to claim 1, characterized in that: The widths of the N sub-bands are different.

9. The method according to claim 6, characterized in that The zero frequency position of the baseband is the zero frequency position of the channel bandwidth.

10. 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.

11. 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 is mapped when the sub-band is subjected to inverse Fourier transform.

12. 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.

13. 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.

14. The method according to claim 1, characterized in that Perform inverse Fourier transform on a set of second sequences corresponding to each sub-band to obtain a set of target time domain data sequences, including: Perform inverse Fourier transform on a group of second sequences corresponding to each subband to obtain N groups of third sequences; Perform inverse Fourier transform on the N groups of third sequences to obtain a group of target time domain data sequences.

15. The method according to claim 14, characterized in that Before performing inverse Fourier transform on a group of second sequences corresponding to each sub-band respectively, the method further includes: Perform zero padding operation on both ends of each group of second sequences to obtain a zero-padded second sequence; wherein each group of the zero-padded second 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 second sequences is M*s(n).

16. The method according to claim 14, characterized in that Before performing inverse Fourier transform on the N groups of third sequences, the method further includes: Adding a cyclic prefix CP of length Ncp to N groups of third sequences; wherein Ncp is a natural number; When the Ncp is 0, it means that no CP is added to the third sequence.

17. The method according to claim 14, characterized in that Before performing inverse Fourier transform on the N groups of third sequences, the method further includes: A frequency shift operation is performed on the N groups of third sequences.

18. The method according to claim 14, characterized in that The performing multiple inverse Fourier transforms 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.

19. The method according to claim 14, 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.

20. The method according to claim 19, 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.

21. The method according to claim 19, characterized in that The process of multiple inverse Fourier transforms includes: For subbands with different subcarrier spacings, the length of the second sequence corresponding to the subband with the smallest subcarrier spacing is used as the reference length; For the second sequences corresponding to the subbands with non-minimum subcarrier spacing, at least two groups of second sequences are selected, serially connected to form sequences with the same length as the reference length, forming new N groups of second sequences, and multiple inverse Fourier transforms are performed on the new N groups of second sequences.

22. The method according to claim 14, characterized in that The number of points of multiple inverse Fourier transforms performed on the N groups of third sequences is greater than N; and the number of points of each inverse Fourier transform in the multiple inverse Fourier transforms is greater than or equal to M.

23. The method according to claim 15, 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.

24. 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 23.

25. 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 23 is implemented.

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