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 two-end zero padding, cyclic shift and inverse Fourier transform operations on each group of first sequences in sequence 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 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 zero padding, cyclic shift and inverse Fourier transform operations on each group of the first sequences in turn to obtain a group of target time domain data sequences;

[0007] The target time domain data sequence is transmitted on preconfigured time-frequency resources.

[0008] An embodiment of the present application provides a communication device, including: a memory, and one or more processors;

[0009] The memory is configured to store one or more programs;

[0010] 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.

[0011] 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

[0012] Figure 1 is a flow chart of a data transmission method provided by an embodiment of the present application;

[0013] Figure 2 It is a schematic diagram of generating a target time domain data sequence provided by an embodiment of the present application;

[0014] Figure 3 is a schematic diagram of generating another target time domain data sequence provided by an embodiment of the present application;

[0015] Figure 4 This is another schematic diagram of generating a target time domain data sequence provided by an embodiment of the present application;

[0016] Figure 5 This is a schematic diagram of generating another target time domain data sequence provided in an embodiment of the present application;

[0017] Figure 6 This is a schematic diagram of generating another target time domain data sequence provided in an embodiment of the present application;

[0018] Figure 7 This is a schematic diagram of generating another target time domain data sequence provided in an embodiment of the present application;

[0019] Figure 8 This is a schematic diagram of generating another target time domain data sequence provided in an embodiment of the present application;

[0020] Fig. 9 This is a schematic diagram of generating another target time domain data sequence provided in an embodiment of the present application;

[0021] Fig.10 is a transmission schematic diagram of data to be transmitted provided in an embodiment of the present application;

[0022] Fig.11 is a structural block diagram of a data transmission device provided in an embodiment of the present application;

[0023] Fig.12 It is a structural diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] S110, dividing the data to be transmitted into N groups of first sequences.

[0030] 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 N groups of 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.

[0031] S120, performing zero padding, cyclic shift and inverse Fourier transform operations on each group of first sequences in turn to obtain a group of target time domain data sequences.

[0032] S130. Transmit a target time domain data sequence on pre-configured time-frequency resources.

[0033] The data to be transmitted is divided into N groups of first sequences, and the nth group of first sequences in the N groups of first sequences is padded with zeros at both ends, cyclic shifted, and inverse Fourier transformed in turn to form a group of target time domain data sequences, and this group of target time domain data sequences is transmitted on the pre-configured time-frequency resources. By performing cyclic shift in the frequency domain on the first sequence after padding with zeros at both ends before performing inverse Fourier transform on the first sequence in advance, the data of each sub-band can be aligned with its own position in the frequency domain, thereby ensuring that it can be accurately mapped to the sub-band position during subsequent filtering.

[0034] In one embodiment, each group of first sequences is subjected to zero padding at both ends, cyclic shift, and inverse Fourier transform operations in sequence to obtain a group of target time domain data sequences, including:

[0035] Perform zero padding operation on both ends of each group of first sequences to obtain N groups of second sequences; wherein each group of second sequences contains M*s(n) data; M is a positive integer, s(n)≥k(n);

[0036] Cyclic shift is performed on each group of second sequences to obtain N groups of third sequences;

[0037] Perform inverse Fourier transform on the N groups of third sequences to obtain N groups of fourth sequences;

[0038] Perform inverse Fourier transform on the N groups of fourth sequences to form a group of target time domain data sequences.

[0039] Perform zero padding operation on both ends of each group of first sequences to obtain N groups of second sequences, each group of second sequences contains M*s(n) data; perform cyclic shift operation on each group of second sequences to obtain N groups of third sequences; perform M*s(n) point inverse Fourier transform on each group of third sequences to form N groups of fourth sequences; then perform inverse Fourier transform on the N groups of fourth sequences to form a group of target time domain data sequences, and transmit this group of target time domain data sequences on time-frequency resources.

[0040] In one embodiment, the channel bandwidth includes N sub-bands, and each sub-band corresponds to a set of first sequences.

[0041] In one embodiment, the cyclic shift is performed within the range after the first sequence is padded with zeros at both ends, and the cyclic shift operation range is greater than k(n). Each of the N groups of second sequences is cyclically shifted, and the operation range of the cyclic shift is greater than k(n), that is, the cyclic shift is performed within the range after the first sequence is padded with zeros at both ends. Since the first-level IFFT is oversampled, the actual cyclic shift direction should be within the range of the first-level IFFT, that is, greater than k(n).

[0042] In one embodiment, the cyclic shift amount of the nth group of second sequences is related to the zero frequency position of the channel bandwidth and the frequency domain position corresponding to the nth group of first sequences. The cyclic shift amount can be configured according to the position of the subband in the channel bandwidth.

[0043] In one embodiment, if the zero frequency of the channel bandwidth is on the first y(n) subcarriers of the frequency domain position mapped to the data at the zero subcarrier position when the nth group of first sequences is inverse Fourier transformed, the nth group of second sequences is cyclically shifted backward by [y(n)mod M*s(n)] data; wherein y(n) is a real number ≥0.

[0044] In one embodiment, if the zero frequency of the channel bandwidth is on the y(n) subcarriers after the frequency domain position mapped by the data at the zero subcarrier position when the nth group of first sequences is inversely Fourier transformed, the nth group of second sequences is cyclically shifted forward by [y(n)mod M*s(n)] data; wherein y(n) is a real number ≥ 0. In one example, the relationship between the cyclic shift amount and the subband position can be specifically given.

[0045] In one embodiment, when the cyclic shift amount of the nth group of second sequences is [y(n)mod M*s(n)], the nth group of second sequences does not perform cyclic shift. No cyclic shift is required for subbands that meet the conditions.

[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, 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.

[0048] 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 second sequences.

[0049] In one embodiment, the number of points for inverse Fourier transform of each group of third sequences satisfies one of the following conditions: the ratio of the number of points for inverse Fourier transform of two adjacent groups of third sequences satisfies 2 to the power of i; the number of points for inverse Fourier transform of each group of third 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.

[0050] 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.

[0051] In one embodiment, inverse Fourier transform is performed on N groups of fourth sequences to form a group of target time domain data sequences, including:

[0052] 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;

[0053] Perform inverse Fourier transform on the N groups of fourth 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-fold 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 the N groups of fourth 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-fold 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 the N groups of fourth sequences and other P groups of target frequency domain data sequences together to form a group of target time domain data sequences.

[0054] In one embodiment, performing inverse Fourier transform on N groups of fourth sequences to form a group of target time domain data sequences includes: performing an oversampled inverse Fourier transform on each N data, and each N data comes from the N groups of third sequences. In one example, the process of performing inverse Fourier transform on N groups of fourth sequences includes: performing an oversampled inverse Fourier transform on each N data, and each N data comes from the N groups of fourth sequences.

[0055] 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 fourth 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 fourth sequence. In an embodiment, an oversampled inverse Fourier transform is performed on N data in the fourth 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.

[0056] 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 fourth 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 N groups of fourth sequences. Exemplarily, it is assumed that N groups of fourth sequences are distributed in N rows (i.e., one group of fourth 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 N groups of fourth sequences are distributed in N columns (i.e., one group of fourth 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).

[0057] 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 oversampled N target data. 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.

[0058] 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 fourth sequence corresponding to the subband with the minimum subcarrier spacing as the reference length; for the fourth sequence corresponding to the subband with non-minimum subcarrier spacing, selecting at least two groups of fourth sequences, serially connecting them to form a sequence with the same length as the reference length, forming a new N groups of fourth sequences, and performing multiple inverse Fourier transforms on the new N groups of fourth 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.

[0059] 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.

[0060] 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).

[0061] 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.

[0062] 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;

[0063] 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.

[0064] 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.

[0065] 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.

[0066] In one embodiment, the data transmission method further includes: performing a windowing operation on a set of target time domain data sequences.

[0067] Example 1

[0068] 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.

[0069] like Figure 2As shown, the data to be transmitted is divided into 4 groups of first sequences, each group of first sequences contains 64 data. First, 32 0 subcarriers are added to both ends of each group of first sequences to form 4 groups of second sequences, and the number of points of each group of second sequences is 128. 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 and fourth groups of data are cyclically shifted backward by 64 data to obtain the third sequence; then the third sequence is subjected to 128-point inverse Fourier transform to form 4 groups of fourth sequences; then the 4 groups of fourth sequences are subjected to subband-level inverse Fourier transform and multi-phase 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.

[0070] Example 2

[0071] 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.

[0072] like Figure 3 As shown, the data to be transmitted is divided into 4 groups of first sequences, each group of first sequences contains 64 data. First, 32 0 subcarriers are added to both ends of each group of first sequences to form 4 groups of second sequences, and the number of points of each group of second sequences is 128. 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, the first group of data is cyclically shifted forward by 64 data, and the third group of data is cyclically shifted backward by 64 data to obtain the third sequence; then the third sequence is subjected to 128-point inverse Fourier transform to form 4 groups of fourth sequences; then the 4 groups of fourth sequences are subjected to subband-level inverse Fourier transform and multi-phase 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.

[0073] Example 3

[0074] 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.

[0075] like Figure 4As shown, the data to be transmitted is divided into 4 groups of first sequences, each group of first sequences contains 48 data. First, 40 0 ​​subcarriers are added to both ends of each group of first sequences to form 4 groups of second sequences, and the number of points of each group of second sequences is 128. 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 and third groups of data are cyclically shifted backward by 48 and 96 data respectively, and the fourth group of data is cyclically shifted backward by 16 data to obtain the third sequence; then the third sequence is subjected to 128-point inverse Fourier transform to form 4 groups of fourth sequences; then the 4 groups of fourth sequences are subjected to subband-level inverse Fourier transform and multi-phase 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.

[0076] Example 4

[0077] 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.

[0078] like Figure 5 As shown, the data to be transmitted is divided into 4 groups of first sequences, each group of first sequences contains 40 data. 44 0 subcarriers are added to both ends of each group of first sequences to form 4 groups of second sequences, and the number of points of each group of second sequences is 128. 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 cyclically shifted backward by 40, 80 and 120 data respectively to obtain the third sequence; then the third sequence is subjected to 128-point inverse Fourier transform to form 4 groups of fourth sequences; then the 4 groups of fourth sequences are subjected to subband-level inverse Fourier transform and multi-phase 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.

[0079] Example 5

[0080] 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, which is 64, and the number of zeros padded at both ends of each group of the first sequence as 32 as an example.

[0081] like Figure 6As shown, the data to be transmitted is divided into 4 groups of first sequences, each group of first sequences contains 64 data. 32 0 subcarriers are added to both ends of each group of first sequences to form 4 groups of second sequences, and the number of points of each group of second sequences is 128. 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 and fourth groups of data are cyclically shifted backward by 64 data to obtain the third sequence; then the third sequence is subjected to 128-point inverse Fourier transform to form 4 groups of fourth sequences; then the 4 groups of fourth sequences and other groups of data are subjected to subband-level inverse Fourier transform and multi-phase 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 subband-level processing after zero padding, cyclic shift, IDFT and other operations. The group of target time domain data sequences is transmitted on the time-frequency resources.

[0082] Example 6

[0083] 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, 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.

[0084] like Figure 7 As shown, the data to be transmitted is divided into 4 groups of first sequences, each group of first sequences contains 64 data. The first group of first sequences contains 32 reference signals. 32 0 subcarriers are added to both ends of each group of first sequences to form 4 groups of second sequences, and the number of points of each group of second sequences is 128. 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 and fourth groups of data are cyclically shifted backward by 64 data to obtain the third sequence; then the third sequence is subjected to 128-point inverse Fourier transform to form 4 groups of fourth sequences; then the 4 groups of fourth sequences are subjected to subband-level inverse Fourier transform and multi-phase 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.

[0085] Example 7

[0086] In one example, Figure 8This 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.

[0087] like Figure 8 As shown, the data to be transmitted are divided into 4 groups of first sequences, each of the first two groups of first sequences contains 32 data, and each of the last two groups of first sequences contains 64 data. Firstly, 16 0 subcarriers are added to both ends of each first sequence of the first two groups to obtain the corresponding second sequence, and the number of points of each second sequence is 64. 32 0 subcarriers are added to both ends of each first sequence of the last two groups to obtain the corresponding second sequence, and the number of points of each second sequence is 128, forming a total of 4 groups of second sequences; 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 group of data is cyclically shifted backward by 32 data, and the fourth group of data is cyclically shifted backward by 64 data to obtain the corresponding third sequence; then the first two groups of third sequences are subjected to 64-point inverse Fourier transform, and the second two groups of third sequences are subjected to 128-point inverse Fourier transform, and the first two groups of data are respectively 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 last two groups of data, form 4 groups of 128-point fourth sequences; then the 4 groups of fourth sequences are subjected to subband-level inverse Fourier transform and polyphase filtering operations to form a group of target time domain data sequences. The set of target time domain data sequences is transmitted on the time-frequency resources.

[0088] Example 8

[0089] 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, 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.

[0090] like Fig. 9As shown, the data to be transmitted is divided into 4 groups of first sequences, each group of first sequences contains 64 data. 32 0 subcarriers are added to both ends of each group of first sequences to form 4 groups of second sequences, and the number of points of each group of second sequences is 128. 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 and fourth groups of data are cyclically shifted backward by 64 data to obtain the corresponding third sequence; then the third sequence is subjected to 128-point inverse Fourier transform to form 4 groups of fourth sequences; then one data is taken out from each fourth sequence in sequence according to the column, and a total of 4 data are taken out, and an oversampled 16-point inverse Fourier transform is performed on each of the 4 taken out data to obtain a subsymbol, and then each subsymbol is repeatedly extended by 4 times, and finally 128 subsymbols 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, i.e., half a subsymbol length. The group of target time domain data sequences is transmitted on the time-frequency resources.

[0091] Example 9

[0092] In one example, Fig.10 Schematic diagram of data transmission to be transmitted provided by an embodiment of the present application. Fig.10 As shown, the data to be transmitted is windowed or filtered in sequence; then the DAC and RF processes are performed.

[0093] like Fig.10 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.

[0094] 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.

[0095] 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.

[0096] In one embodiment, Fig.11 is a structural block diagram of a data transmission device provided in an embodiment of the present application. Fig.11 As shown, the data transmission device in this embodiment includes: a division module 1110 , a conversion module 1120 and a transmission module 1130 .

[0097] The division module 1110 is configured to divide 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.

[0098] The conversion module 1120 is configured to perform zero padding at both ends, cyclic shift and inverse Fourier transform operations on each group of first sequences in sequence to obtain a group of target time domain data sequences.

[0099] The transmission module 1130 is configured to transmit the target time domain data sequence on the pre-configured time-frequency resources.

[0100] In one embodiment, the conversion module 1120 includes:

[0101] The zero padding unit is configured to perform zero padding operations on both ends of each group of first sequences to obtain N groups of second sequences; wherein each group of second sequences contains M*s(n) data; M is a positive integer, s(n)≥k(n);

[0102] A shift unit, configured to perform cyclic shift on each group of second sequences respectively to obtain N groups of third sequences;

[0103] A first transform unit is configured to perform inverse Fourier transform on the N groups of third sequences to obtain N groups of fourth sequences;

[0104] The second transformation unit is configured to perform inverse Fourier transform on the N groups of fourth sequences to form a group of target time domain data sequences.

[0105] In one embodiment, the channel bandwidth includes N sub-bands, and each sub-band corresponds to a set of first sequences.

[0106] In one embodiment, the cyclic shift is performed within a range after zero padding is performed on both ends of the first sequence, and the cyclic shift operation range is greater than k(n).

[0107] In one embodiment, the cyclic shift amount of the cyclic shift performed on the nth group of second sequences is related to the zero-frequency position of the channel bandwidth and the frequency domain position corresponding to the nth group of first sequences.

[0108] In one embodiment, if the zero frequency of the channel bandwidth is on the first y(n) subcarriers of the frequency domain position mapped to the data at the zero subcarrier position when the nth group of first sequences is inverse Fourier transformed, the nth group of second sequences is cyclically shifted backward by [y(n)mod M*s(n)] data; wherein y(n) is a real number ≥0.

[0109] In one embodiment, if the zero frequency of the channel bandwidth is on the last y(n) subcarriers of the frequency domain position mapped to the data at the zero subcarrier position when the nth group of first sequences is inverse Fourier transformed, the nth group of second sequences is cyclically shifted forward by [y(n)mod M*s(n)] data; wherein y(n) is a real number ≥0.

[0110] In one embodiment, when the cyclic shift amount of the n-th group of second sequences is [y(n)mod M*s(n)], the n-th group of second sequences is not cyclically shifted.

[0111] 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.

[0112] 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.

[0113] 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 second sequences.

[0114] In one embodiment, the number of points for inverse Fourier transform of each group of third sequences satisfies one of the following conditions: the ratio of the number of points for inverse Fourier transform of two adjacent groups of third sequences satisfies 2 to the power of i; the number of points for inverse Fourier transform of each group of third sequences is the same; wherein i is an integer.

[0115] In one embodiment, inverse Fourier transform is performed on N groups of fourth sequences to form a group of target time domain data sequences, including:

[0116] 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;

[0117] Perform inverse Fourier transform on the N groups of fourth 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.

[0118] In one embodiment, inverse Fourier transform is performed on N groups of fourth sequences to form a group of target time domain data sequences, including:

[0119] An oversampled inverse Fourier transform is performed on every N data, and every N data comes from N groups of third sequences.

[0120] 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 fourth sequence; wherein the number of initial time domain data sequences is equal to the number of inverse Fourier transform operations.

[0121] 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:

[0122] Extract N data from the N groups of the fourth sequence, the same number as the total number of groups in the first sequence;

[0123] 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 fourth sequences respectively.

[0124] 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.

[0125] In one embodiment, the process of generating multiple initial time domain data sequences by multiple inverse Fourier transforms includes:

[0126] For subbands with different subcarrier spacings, the length of the fourth sequence corresponding to the subband with the smallest subcarrier spacing is used as the reference length;

[0127] For the fourth sequence corresponding to the subband with non-minimum subcarrier spacing, select at least two groups of fourth sequences, concatenate them into sequences with the same length as the reference length, form new N groups of fourth sequences, perform multiple inverse Fourier transforms on the new N groups of fourth sequences, and obtain corresponding multiple initial time domain data sequences.

[0128] 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;

[0129] 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.

[0130] 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;

[0131] The zero-frequency positions of different groups of third sequences when performing inverse Fourier transform operations are different.

[0132] 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.

[0133] 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;

[0134] 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.

[0135] 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.

[0136] 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.

[0137] In one embodiment, the data transmission method further includes: performing a windowing operation on a set of target time domain data sequences.

[0138] 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.

[0139] In one embodiment, Fig.12 Schematic diagram of a communication device provided in an embodiment of the present application. Fig.12 As shown, the device provided by the present application includes: a processor 1210, a memory 1220 and a communication module 1230. The number of processors 1210 in the device can be one or more. Fig.12 In the example, a processor 1210 is used. The number of memories 1220 in the device may be one or more. Fig.12 A memory 1220 is taken as an example. The processor 1210, the memory 1220 and the communication module 1230 of the device can be connected via a bus or other means. Fig.12 In the embodiment, the communication device may be a base station side or a terminal side.

[0140] The memory 1220, 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 1110, the conversion module 1120, and the transmission module 1130 in the data transmission device). The memory 1220 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 1220 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 1220 may further include a memory remotely arranged relative to the processor 1210, 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. Among them, the communication interface module 1230 is used for data interaction between multiple communication devices.

[0141] 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.

[0142] An embodiment of the present application also provides a storage medium containing computer executable instructions, which, when executed by a computer processor, is 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 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 zero-padding, cyclic shift and inverse Fourier transform operations on each group of the first sequences in turn to obtain a group of target time domain data sequences; and transmitting the target time domain data sequences on pre-configured time-frequency resources.

[0143] 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.

[0144] 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.

[0145] 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.

[0146] 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.

[0147] 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 zero padding, cyclic shift and inverse Fourier transform operations on each group of the first sequences in turn to obtain 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 step of performing zero padding, cyclic shifting, and inverse Fourier transform operations on each group of the first sequences in sequence to obtain a group of target time domain data sequences includes: Perform zero padding operation on both ends of each group of the first sequences to obtain N groups of second sequences; wherein each group of the second sequences contains M*s(n) data; M is a positive integer, s(n)≥k(n); Cyclic shift is performed on each group of the second sequences to obtain N groups of third sequences; Performing inverse Fourier transform on the N groups of third sequences to obtain N groups of fourth sequences; Perform inverse Fourier transform on the N groups of fourth sequences to form a group of target time domain data sequences.

3. 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.

4. The method according to claim 2, characterized in that: The cyclic shift is performed within a range after zero padding is performed on both ends of the first sequence, and the cyclic shift operation range is greater than k(n).

5. The method according to claim 2, characterized in that: The cyclic shift amount of the nth group of second sequences cyclically shifted is related to the zero-frequency position of the channel bandwidth and the frequency domain position corresponding to the nth group of first sequences.

6. The method according to claim 2, characterized in that If the zero frequency of the channel bandwidth is on the first y(n) subcarriers of the frequency domain position mapped to the data at the zero subcarrier position when the nth group of first sequences is subjected to inverse Fourier transform, the nth group of second sequences is cyclically shifted backward by [y(n)mod M*s(n)] data; wherein y(n) is a real number ≥0.

7. The method according to claim 2, characterized in that: If the zero frequency of the channel bandwidth is at the y(n) subcarriers after the frequency domain position mapped with the data at the zero subcarrier position when the nth group of first sequences is subjected to inverse Fourier transform, the nth group of second sequences is cyclically shifted forward by [y(n)mod M*s(n)] data; wherein y(n) is a real number ≥0.

8. The method according to claim 6 or 7, characterized in that: When the cyclic shift amount of the n-th group of second sequences is [y(n)mod M*s(n)], the n-th group of second sequences does not undergo cyclic shift.

9. The method according to claim 3, 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 performing inverse Fourier transform on N groups of third sequences.

10. The method according to claim 2, characterized in that The performing inverse Fourier transform on the N groups of fourth 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 fourth 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.

11. The method according to claim 2, 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 fourth sequence; wherein the number of the initial time domain data sequences is equal to the number of inverse Fourier transform operations.

12. The method according to claim 11, 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 fourth 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 fourth sequences.

13. The method according to claim 11, 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.

14. The method according to claim 11, 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 fourth sequence corresponding to the subband with the smallest subcarrier spacing is used as the reference length; For the fourth sequence corresponding to the subband with non-minimum subcarrier spacing, select at least two groups of fourth sequences, concatenate them into sequences with the same length as the reference length, form new N groups of fourth sequences, perform multiple inverse Fourier transforms on the new N groups of fourth sequences, and obtain corresponding multiple initial time domain data sequences.

15. The method according to claim 2, 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.

16. 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 15.

17. 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 15 is implemented.

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