CN111510412A - Data modulation method, device and equipment - Google Patents
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Abstract
The embodiment of the disclosure discloses a data modulation method, a device, equipment and a computer-readable storage medium, wherein the method comprises the steps of respectively inserting a sequence S1 and a sequence S2 in front of and behind each of L first data sequences to be transmitted, inserting a sequence NS3 behind the sequence S2 to form L second data sequences, wherein the sequence NS3 is composed of N sequences S3, L and N are integers, L > is 2, and N > is 0, and the L second data sequences are sequentially transmitted.
Description
Technical Field
The disclosed embodiments relate to, but are not limited to, a data modulation method, apparatus, device and computer readable storage medium.
Background
The 4G (Fourth Generation) L TE (L ong Term Evolution) adopts OFDM (Orthogonal Frequency Division Multiplexing) technology, and time-Frequency resources formed by subcarriers and OFDM symbols constitute wireless physical time-Frequency resources of L TE system, the OFDM technology adopts CP (Cyclic Prefix) to solve the multipath time delay problem well, and divides a Frequency selective channel into a set of parallel flat fading channels, which simplifies the channel estimation method well, the DFT-s-OFDM (Discrete Fourier Transform spread OFDM) technology is based on CP-OFDM, and adds DFT (Discrete Fourier Transform) before the subcarrier mapping, which solves the high PAPR (Peak Average Power Ratio) of CP-OFDM (peer generated Average Power Ratio) well, so that the CP-OFDM (New Generation) PAPR (Peak Average Power Ratio) problem still adopts the CP-NR (Third Generation) communication technology, which adopts the CP (Cyclic Prefix) technology.
But CP-OFDM has the disadvantages of spectral leakage and low spectral efficiency.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
The embodiment of the disclosure provides a data modulation method, a device, equipment and a computer readable storage medium.
The embodiment of the disclosure provides a data modulation method, which includes:
inserting a sequence S1 and a sequence S2 in front of and behind each of L first data sequences to be transmitted respectively, and inserting a sequence NS3 behind the sequence S2 to form L second data sequences, wherein the sequence NS3 consists of N sequences S3, L and N are integers, L > is 2, and N > is 0;
and transmitting the L second data sequences in sequence.
The embodiment of the present disclosure further provides a data modulation apparatus, including:
the device comprises a generating module, a transmitting module and a receiving module, wherein the generating module is used for respectively inserting a sequence S1 and a sequence S2 in front of and behind each L first data sequences to be transmitted, inserting a sequence NS3 behind the sequence S2 to form L second data sequences, wherein the sequence NS3 consists of N sequences S3, L and N are integers, L > is 2, and N > is 0;
and the transmission module is used for sequentially transmitting the L second data sequences.
An embodiment of the present disclosure further provides a data modulation apparatus, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the data modulation method when executing the program.
The embodiment of the disclosure also provides a computer-readable storage medium, which stores computer-executable instructions for executing the data modulation method.
The method comprises the steps of respectively inserting a sequence S1 and a sequence S2 in front of and behind each L first data sequences to be transmitted, inserting a sequence NS3 behind the sequence S2 to form L second data sequences, wherein the sequence NS3 is composed of N sequences S3, L and N are integers, L > is equal to 2, and N > is equal to 0, and transmitting the L second data sequences in sequence.
Other aspects will be apparent upon reading and understanding the attached drawings and detailed description.
Drawings
Fig. 1 is a flow chart of a data modulation method of an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a first application example of the disclosure;
FIG. 3 is a schematic diagram of a second application example of the disclosure;
FIG. 4 is a schematic diagram of a third application example of the present disclosure;
FIG. 5 is a schematic diagram of example four of an application of the present disclosure;
FIG. 6 is a schematic diagram of application example five of the present disclosure;
FIG. 7 is a schematic diagram of example six of an application of the present disclosure;
FIG. 8 is a schematic diagram of example application seventh of the present disclosure;
FIG. 9 is a schematic diagram of a data modulation device of an embodiment of the present disclosure;
fig. 10 is a schematic diagram of a data modulation apparatus of an embodiment of the present disclosure.
Detailed Description
Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
The spectrum leakage of the CP-OFDM-based waveform is large. The 5G NR supports mixed use of different parameter sets (Numerology), i.e., supports different subcarrier spacings between adjacent subbands, and thus, a certain interference is generated between the adjacent subbands. Although some implementation techniques, such as soft CP or filtering, may reduce the spectrum leakage and interference between sub-bands slightly, some guard interval is still required between sub-bands with different sub-carrier intervals. This reduces the spectral efficiency.
For a high-frequency scene, currently, the IEEE 802.11ad protocol adopts an SC (Single Carrier) technology, the PAPR of an SC signal is low, and an adopted GI (Guard Interval) has the advantages of supporting channel estimation, time/frequency tracking, phase noise compensation, and the like, however, the SC needs a certain Guard Interval when performing frequency division multiplexing, which reduces the spectrum efficiency.
In addition, although the CP can resist multipath delay, the CP does not carry any useful data, and the overhead of wireless physical time-frequency resources is increased. When the frequency band used is high frequency, such as the frequency band range of 24.25GHz-52.6GHz and >52.6GHz, the CP overhead problem is more serious because the subcarrier spacing requirement is larger, i.e. the symbol length is shorter.
In view of the above situation, the embodiments of the present disclosure provide a data modulation method, which can be applied to a transmitting node, including but not limited to a base station, a terminal, and the like. The method of the embodiment of the disclosure can flexibly reduce the cost of CP/GI, and can well inhibit the out-of-band leakage, and keep lower PAPR and higher channel estimation precision.
As shown in fig. 1, a data modulation method according to an embodiment of the present disclosure includes:
And 102, sequentially transmitting the L second data sequences.
In step 101, the sequence insertion method is also equivalent to inserting the sequence S2, the sequence NS3 and the sequence S1 between every adjacent first data sequence in L first data sequences, inserting the sequence S1 in front of L first data sequences, and inserting the sequence S2 and the sequence NS3 behind L first data sequences.
In the embodiment of the disclosure, the sequence S1 and the sequence S2 are respectively inserted into the front edge and the back edge of each L first data sequences, so that the front edge data and the back edge data of each second data sequence obtained after insertion are equal.
In the embodiment of the disclosure, the same sequence NS3 is inserted after each sequence S2, and since the front and rear sides of each second data sequence are equal, a tail data sequence of each second data sequence is equal after oversampling or digital-to-analog conversion, so that when a receiving end performs DFT processing, the tail data sequence of a preceding DFT-S-OFDM symbol or data segment can be used as a Cyclic Prefix (CP) of a following DFT-S-OFDM symbol or data segment, and when the receiving end performs DFT processing, the influence of a multipath delay channel can be resisted.
The sequence NS3 is composed of N identical sequences S3, and when the N values of adjacent DFT-S-OFDM symbols or data segments are different, the tail data sequence of the preceding DFT-S-OFDM symbol or data segment can still be used as the cyclic prefix CP of the following symbol or data segment. Thus, the system can flexibly adjust the length of the sequence NS3 according to the multipath delay of the wireless channel. In the case that the FFT (Fast Fourier Transform) processing window length is not changed, when N is smaller, the data sequence of the symbol may be longer, which is equivalent to improving the spectrum efficiency.
In one embodiment, the sequence S1, the sequence S2, and the sequence S3 are reference sequences, i.e., known by the receiving end. For example, the sequence S1, the sequence S2, and the sequence S3 may include, but are not limited to, a pi/2 BPSK (Binary Phase shift keying) modulated data sequence, a ZC (Zadoff-chu) sequence, a Golay (gray) sequence, and the like.
In the embodiment of the present disclosure, the sequence S1, the sequence S2, and the sequence S3 may serve as a CP to resist multipath delay, and the sequence S1, the sequence S2, and the sequence S3 are reference sequences, so that the CP carries useful data, and accordingly, the wireless physical time-frequency resource overhead is reduced.
In one embodiment, S2 is S3 (i.e., the sequence S2 is the same length and content as the sequence S3), which corresponds to inserting the sequence (N +1) S3 after each first data sequence. The sequence (N +1) S3 consists of N +1 sequences S3.
In one embodiment, the sequence S1 is S2 (i.e., the sequence S1 is the same length and content as the sequence S2).
In one embodiment, the sequence S1 is S2 is S3 (i.e., the sequence S1, the sequence S2 and the sequence S3 are the same length and content).
The three schemes of the sequence S2-S3, the sequence S1-S2 and the sequence S1-S2-S3 simplify the implementation complexity of the schemes.
In an embodiment, the method further comprises:
said sequence NS3 is inserted before the sequence S1 preceding the first said first data sequence.
Thus, each sequence S1 is preceded by a sequence NS3, and the sequence NS3 can be used as a cyclic prefix to withstand the effects of the multipath delay channel.
Therefore, in step 101, the sequence insertion method is also equivalent to inserting the sequence S1 and the sequence S2 before and after each of the L first data sequences to be transmitted, inserting the sequence NS3 before the sequence S1, and inserting the sequence NS3 after the sequence S2 after the L first data sequences.
In an embodiment, the method further comprises:
when the value of N is changed, the length of the second data sequence is kept unchanged.
The length of the second data sequence is a data block length, and when the N value changes, the data block length is not changed, and the length of the first data sequence can be set to change in accordance with the N value.
In this embodiment, when the value of N changes, the length of the second data sequence does not change, so that the FFT processing window length may not change regardless of the change of the value of N. Therefore, the method is simple to operate and beneficial to synchronization, and can realize orthogonality with other users when frequency division multiplexing is carried out.
In an embodiment, after the step 101, the method further includes: performing FFT processing, subcarrier mapping (when some subcarriers contain data 0, oversampling may be achieved), and IFFT (Inverse Fast Fourier Transform) processing on each second data sequence in sequence;
the step 102 comprises: and sequentially transmitting the second data sequence after the FFT processing, the subcarrier mapping and the IFFT processing.
In one embodiment, the length of the second data sequence is equal to the length of the window used for the FFT processing.
In an embodiment, the start-stop position of the FFT processing corresponds to the start-stop position of the second data sequence.
That is, the start/stop positions of the second data sequence are the start/stop positions of FFT processing, and the start/stop positions of FFT processing are sequence S1 and sequence NS3, respectively.
Herein, the FFT processing also includes the DFT processing concept, and the IFFT processing also includes the IDFT (inverse discrete Fourier Transform) processing concept.
In an embodiment, said sequentially transmitting the L second data sequences includes:
filter and a/d conversion are performed on the L second data sequences, and a signal is obtained after the transmission of the d/a conversion (FFT and IFFT processing may not be performed)
In an embodiment, said sequentially transmitting the L second data sequences includes:
dividing real parts and imaginary parts of the L second data sequences to form data sequences of the real parts and data sequences of the imaginary parts respectively;
filtering and carrying out digital-to-analog conversion on the data sequence of the real part, and filtering and carrying out digital-to-analog conversion on the data sequence of the imaginary part;
and obtaining a signal after the transmission digital-to-analog conversion.
In an embodiment, the method further comprises:
and carrying indication information for indicating the value of the N in the control information, and transmitting the control information.
In an embodiment, the indication information is further used to indicate a length of the first data sequence, that is, a number of data included in the first data sequence.
In an embodiment, the Control information is transmitted through a downlink or uplink Control channel, or the Control information is transmitted through a downlink or uplink RRC (Radio Resource Control) signaling.
In the embodiment of the disclosure, indication information may be added to the control information format to indicate the value of N, so that the system may adjust the length of the sequence NS3 timely and flexibly according to the size of the wireless channel multipath delay, thereby improving the spectrum efficiency to the maximum extent. The receiving end knows the value of N from the indication information, and then knows the length of the sequence NS3 and the length of the first/second data sequence.
The following description is given with reference to some application examples.
Application example 1
As shown in fig. 2, an example of a time domain modulation process is performed for each of the L first data sequences.
In fig. 2, the L first Data sequences are Data1 and Data2, respectively, that is, they contain 2 first Data sequences, wherein the front and back of the 1 st first Data sequence Data1 are inserted into sequence S1 and sequence S2, respectively, and sequence NS3 is inserted after the sequence S2 to form the 1 st second Data sequence, the front and back of the 2 nd first Data sequence Data2 are inserted into sequences S1 and S2, respectively, and sequence NS3 is inserted after the sequence S2 to form the 2 nd second Data sequence, the sequence NS3 is composed of N sequences S3, wherein the value of N can be flexibly adjusted according to the magnitude of the wireless channel multipath delay, and N in the sequence NS3 in fig. 2 takes the same value of 3, that is, the wireless channel multipath delays of the 1 st second Data sequence and the 2 nd second Data sequence are the same.
The length of each second data sequence is one data block length (when the value of N changes, the data block length is unchanged).
Application example two
Fig. 3 is an example of performing a time domain modulation process on each of the L first data sequences.
In fig. 3, the L first Data sequences are Data1 and Data2, respectively, that is, contain 2 first Data sequences, wherein sequence S1 and sequence S2 are inserted before and after the 1 st first Data sequence Data1, respectively, sequence NS3 is inserted after the sequence S2 to form a1 st second Data sequence, sequence S1 and sequence S2 are inserted before and after the 2 nd first Data sequence Data2, sequence NS3 is inserted after the sequence S2 to form a2 nd second Data sequence, the sequence NS3 is composed of N sequences S3, wherein the value of N can be flexibly adjusted according to the magnitude of wireless channel multipath delay, and N inserted into the sequence NS3 for each second Data sequence in fig. 3 takes the same value of 3, that is, the wireless channel multipath delays of the 1 st second Data sequence and the 2 nd second Data sequence are the same.
The length of each second data sequence is the window length of the subsequent FFT processing, namely, the window lengths of the FFT processing of the 1 st second data sequence and the 2 nd second data sequence are the same; the start and stop position of each second data sequence is the start and stop position of the subsequent FFT processing, that is, the stop position of the FFT processing of the 1 st second data sequence is the start position of the FFT processing of the 2 nd second data sequence.
And transmitting the L second data sequences in sequence.
Application example three
Fig. 4 is an example of performing a time domain modulation process on each of the L first data sequences.
In fig. 4, the L first Data sequences are Data1 and Data2, respectively, that is, 2 first Data sequences are included, wherein the front and rear sides of the 1 st first Data sequence Data1 are inserted into a sequence S1 and a sequence S2, respectively, the sequence S1 is S2, a sequence NS3 is inserted after the sequence S2 to form a1 st second Data sequence, the front and rear sides of the 2 nd first Data sequence Data2 are inserted into sequences S1 and S2, respectively, the sequence S1 is S2, a sequence NS3 is inserted after the sequence S2 to form a2 nd second Data sequence, the sequence NS3 is composed of N sequences S3, wherein N values can be flexibly adjusted according to the size of wireless channel multipath delay, and in fig. 4, N inserted into the sequence NS3 of each second Data sequence takes the same value of 0, that is, the 1 st second Data sequence and the 2 nd second Data sequence are very short wireless channel multipath delay.
The length of each second data sequence is the window length of the subsequent FFT processing, namely, the window lengths of the FFT processing of the 1 st second data sequence and the 2 nd second data sequence are the same, and the application example has higher spectral efficiency when the window length of the FFT processing in the application example I is the same; the start and stop position of each second data sequence is the start and stop position of the subsequent FFT processing, that is, the stop position of the FFT processing of the 1 st second data sequence is the start position of the FFT processing of the 2 nd second data sequence.
And transmitting the L second data sequences in sequence.
Application example four
Fig. 5 is an example of performing a time domain modulation process on each of the L first data sequences.
In fig. 5, the L first Data sequences are Data1 and Data2, that is, include 2 first Data sequences, wherein the front and rear sides of the 1 st first Data sequence Data1 are inserted into sequence S1 and sequence S2, respectively, sequence NS3 is inserted after the sequence S2, the front and rear sides of the 2 nd first Data sequence Data2 are inserted into sequences S1 and S2, respectively, sequence S2 is inserted after the 1 st first Data sequence Data1, the sequence S2 is S3, that is, the front and rear sides of the 2 nd first Data sequence Data 3 are inserted into sequences S1 and S2, respectively, sequence S3 is inserted after the sequence S2, the sequence S3 is S3, that is, sequence S3 is inserted after the 2 nd first Data sequence Data 3, forming a2 nd second Data sequence, the sequence NS3 is composed of N sequences S3, wherein the size of the Data sequences S3 is adjusted according to the wireless time delay value of the first Data sequence NS 365, that the number of the Data sequences S3 is smaller than the wireless multipath Data sequences NS 363.
The length of each second Data sequence is the window length of the subsequent FFT processing, namely, the window length of the FFT processing of the 1 st second Data sequence and the 2 nd second Data sequence is the same, and the sequence length of the 1 st first Data sequence Data1 is greater than that of the 2 nd first Data sequence Data 2; the start and stop position of each second data sequence is the start and stop position of the subsequent FFT processing, that is, the stop position of the FFT processing of the 1 st second data sequence is the start position of the FFT processing of the 2 nd second data sequence.
And transmitting the L second data sequences in sequence.
Application example five
Fig. 6 is an example of performing a time domain modulation process on each of the L first data sequences.
In fig. 6, L first Data sequences are respectively Data1 and Data2, that is, 2 first Data sequences are included, wherein a front edge and a rear edge of a1 st first Data sequence Data1 are respectively inserted with a sequence S1 and a sequence S2, a sequence NS 2 is inserted after the sequence S2, the sequence S2 is S2, that is, a front edge and a rear edge of a1 st first Data sequence Data2 are respectively inserted with a sequence S2 and a sequence (N +1) S2, forming a1 st second Data sequence, a front edge and a rear edge of a2 nd first Data sequence Data2 are respectively inserted with a sequence S2 and a sequence S2, the sequence S2 is inserted after the sequence S2, the sequence S2 is S2, that the sequence S2 is a sequence S2, that the Data sequence S2 is a wireless time delay value of the first Data sequence N is larger than the sequence N Data sequence N is formed by a wireless time delay, and the sequence N is a wireless multipath Data sequence N, wherein the Data sequence is formed by the Data sequence N Data sequence S2, and the Data sequence N is a multipath wireless time delay value of the Data sequence N is larger than the Data sequence N is a multipath Data sequence N.
The length of each second Data sequence is the window length of the subsequent FFT processing, namely, the window length of the FFT processing of the 1 st second Data sequence and the 2 nd second Data sequence is the same, and the sequence length of the 1 st first Data sequence Data1 is smaller than that of the 2 nd first Data sequence Data 2; the start and stop position of each second data sequence is the start and stop position of the subsequent FFT processing, that is, the stop position of the FFT processing of the 1 st second data sequence is the start position of the FFT processing of the 2 nd second data sequence.
And transmitting the L second data sequences in sequence.
Application example six
Fig. 7 shows an example of the waveform modulation process performed on the L first data sequences.
In fig. 7, it is assumed that the L first data sequences form L second data sequences by the method in application example two, application example three, application example four, or application example five.
In fig. 7, the leftmost side is a second data sequence which is serial in the time domain, then DFT processing of M points is performed to convert the second data sequence into a parallel frequency domain, the value of M is the length (i.e. the number of data) of the second data sequence, then subcarrier mapping is performed, data 0 is placed at the position of some subcarriers, oversampling is realized, then IFFT processing of K points is performed to convert the second data sequence into time domain data which is serial in the time domain, thereby sequentially forming L time domain data after IFFT processing, because of oversampling, K > M.
Application example seven
Fig. 8 is an example of the waveform modulation process performed on the L first data sequences.
In fig. 8, it is assumed that the L first data sequences form L second data sequences by the method in application example one, application example two, application example three, application example four, or application example five.
The sequence S1 and the sequence S2 are added before and after each of the L first data sequences, respectively, and the sequence S2 is followed by the sequence ns3. then the real and imaginary parts of the L second data sequences are separated to form the data sequences of the real and imaginary parts, respectively.
As shown in fig. 9, an embodiment of the present disclosure further provides a data modulation apparatus, including:
the generating module 21 is configured to insert a sequence S1 and a sequence S2 in front of and behind each of L first data sequences to be transmitted, and insert a sequence NS3 behind the sequence S2 to form L second data sequences, where the sequence NS3 is composed of N sequences S3, L and N are both integers, L > is 2, and N > is 0;
and the transmission module 22 is configured to sequentially transmit the L second data sequences.
By the embodiment of the disclosure, the out-of-band leakage can be well inhibited, the multi-path time delay change can be flexibly adapted, the spectrum efficiency is improved, and the lower PAPR and the higher channel estimation precision are kept.
In one embodiment, the sequence S1, sequence S2, and sequence S3 are reference sequences.
In one embodiment, the sequence S1, the sequence S2, and the sequence S3 include at least one of:
a pi/2 BPSK modulated data sequence;
a ZC sequence;
a Golay sequence.
In one embodiment, the sequence S2 is the same as sequence S3 in length and content; or
The sequence S1 is the same as the sequence S2 in length and content; or
The sequence S1, the sequence S2 and the sequence S3 are all the same in length and content.
In an embodiment, the generating module 21 is further configured to:
said sequence NS3 is inserted before the sequence S1 preceding the first said first data sequence.
In an embodiment, the generating module 21 is further configured to:
when the value of N is changed, the length of the second data sequence is kept unchanged.
In an embodiment, the transmission module 22 is further configured to:
performing FFT processing, subcarrier mapping and IFFT processing on each second data sequence in sequence;
and sequentially transmitting the second data sequence after the FFT processing, the subcarrier mapping and the IFFT processing.
In one embodiment, the length of the second data sequence is equal to the length of the window used for the FFT processing.
In an embodiment, the start-stop position of the FFT processing corresponds to the start-stop position of the second data sequence.
In an embodiment, the transmission module 22 is configured to:
and filtering and carrying out analog-to-digital conversion on the L second data sequences, and transmitting the signals obtained after the digital-to-analog conversion.
In an embodiment, the transmission module 22 is configured to:
dividing real parts and imaginary parts of the L second data sequences to form data sequences of the real parts and data sequences of the imaginary parts respectively;
filtering and carrying out digital-to-analog conversion on the data sequence of the real part, and filtering and carrying out digital-to-analog conversion on the data sequence of the imaginary part;
and obtaining a signal after the transmission digital-to-analog conversion.
In an embodiment, the transmission module 22 is further configured to:
and carrying indication information for indicating the value of the N in the control information, and transmitting the control information.
In an embodiment, the indication information is further used for indicating the length of the first data sequence.
In an embodiment, the transmission module 22 is configured to:
and transmitting the control information through a downlink or uplink control channel, or transmitting the control information through a downlink or uplink RRC signaling.
As shown in fig. 10, an embodiment of the present disclosure also provides a data modulation apparatus, including: a memory 31, a processor 32 and a computer program 33 stored on the memory 31 and executable on the processor 32, the processor 32 implementing the data modulation method when executing the program.
The embodiment of the disclosure also provides a computer-readable storage medium, which stores computer-executable instructions for executing the data modulation method.
In this embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
Claims (17)
1. A method of data modulation, comprising:
inserting a sequence S1 and a sequence S2 in front of and behind each of L first data sequences to be transmitted respectively, and inserting a sequence NS3 behind the sequence S2 to form L second data sequences, wherein the sequence NS3 consists of N sequences S3, L and N are integers, L > is 2, and N > is 0;
and transmitting the L second data sequences in sequence.
2. The method of claim 1,
the sequence S1, the sequence S2 and the sequence S3 are reference sequences.
3. The method of claim 2, wherein the sequence S1, the sequence S2, and the sequence S3 comprise at least one of:
a pi/2 binary phase shift keying BPSK modulated data sequence;
a ZC sequence;
golay sequences.
4. The method of claim 1,
the sequence S2 is the same as the sequence S3 in length and content; or
The sequence S1 is the same as the sequence S2 in length and content; or
The sequence S1, the sequence S2 and the sequence S3 are all the same in length and content.
5. The method of claim 1, wherein the method further comprises:
said sequence NS3 is inserted before the sequence S1 preceding the first said first data sequence.
6. The method of claim 1, wherein the method further comprises:
when the value of N is changed, the length of the second data sequence is kept unchanged.
7. The method of claim 1,
before the L second data sequences are transmitted in sequence, the method further comprises the steps of carrying out Fast Fourier Transform (FFT) processing, subcarrier mapping and Inverse Fast Fourier Transform (IFFT) processing on each second data sequence in sequence;
the sequentially transmitting the L second data sequences comprises sequentially transmitting the second data sequences after the FFT processing, the subcarrier mapping and the IFFT processing.
8. The method of claim 7,
the length of the second data sequence is equal to the window length used for the FFT processing.
9. The method of claim 8,
the start-stop position of the FFT processing corresponds to the start-stop position of the second data sequence.
10. The method of claim 1, wherein said sequentially transmitting said L second data sequences comprises:
and filtering and carrying out analog-to-digital conversion on the L second data sequences, and transmitting the signals obtained after the digital-to-analog conversion.
11. The method of claim 1, wherein said sequentially transmitting said L second data sequences comprises:
dividing real parts and imaginary parts of the L second data sequences to form data sequences of the real parts and data sequences of the imaginary parts respectively;
filtering and carrying out digital-to-analog conversion on the data sequence of the real part, and filtering and carrying out digital-to-analog conversion on the data sequence of the imaginary part;
and obtaining a signal after the transmission digital-to-analog conversion.
12. The method of claim 1, wherein the method further comprises:
and carrying indication information for indicating the value of the N in the control information, and transmitting the control information.
13. The method of claim 12,
the indication information is further used for indicating the length of the first data sequence.
14. The method of claim 12,
and transmitting the control information through a downlink or uplink control channel, or transmitting the control information through downlink or uplink Radio Resource Control (RRC) signaling.
15. A data modulation device, comprising:
the device comprises a generating module, a transmitting module and a receiving module, wherein the generating module is used for respectively inserting a sequence S1 and a sequence S2 in front of and behind each L first data sequences to be transmitted, inserting a sequence NS3 behind the sequence S2 to form L second data sequences, wherein the sequence NS3 consists of N sequences S3, L and N are integers, L > is 2, and N > is 0;
and the transmission module is used for sequentially transmitting the L second data sequences.
16. A data modulation apparatus comprising: memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the data modulation method according to any one of claims 1 to 14 when executing the program.
17. A computer-readable storage medium storing computer-executable instructions for performing the data modulation method of any one of claims 1-14.
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