CN113114426A - Two-section coding and modulation sending method and sending end - Google Patents
Two-section coding and modulation sending method and sending end Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/007—Unequal error protection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0057—Block codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0059—Convolutional codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
Abstract
The invention provides a two-section type coding and modulation sending method and a sending end, wherein the method comprises the following steps: performing first CRC coding on a bit sequence to be transmitted to obtain a first CRC check bit sequence; dividing a bit sequence to be transmitted carrying the first CRC check bit sequence into a first section of bit sequence and a second section of bit sequence, and respectively carrying out channel coding on the first section of bit sequence and the second section of bit sequence to obtain a first coding sequence and a second coding sequence; and performing signal modulation based on the first coding sequence and the second coding sequence, and transmitting the modulated signal. In the two-segment encoding and modulation sending method and the sending end provided by the embodiment of the invention, for the condition that one segment of data needs to be encoded in two segments, the method not only ensures the error correction performance, but also ensures more CRC bit numbers, namely the CRC error detection performance, and meanwhile, the encoding method with good error correction performance and good error detection performance is provided for the orthogonal waveform differential phase modulation method.
Description
Technical Field
The invention relates to the technical field of data processing, in particular to a two-section type coding and modulation sending method and a sending end.
Background
In order to solve the technical problems that the channel state information of Differential Phase Shift Keying (DPSK) in the modulation and demodulation links is not accurate enough and the noise-resistant performance loss is large, the previous patent proposes orthogonal waveform Differential Phase modulation, namely: dividing a bit sequence to be transmitted into a first bit sequence and a second bit sequence, and respectively carrying out channel coding on the first bit sequence and the second bit sequence to obtain a corresponding first coding sequence and a corresponding second coding sequence; the bit length of the first coding sequence is km, the bit length of the second coding sequence is kn, and k, m and n are integers which are larger than 0; converting each m bits in the first coding sequence into a corresponding section of waveform to obtain k sections of waveforms to form a corresponding waveform sequence; converting every n bits in the second coding sequence into a differential complex number to obtain k differential complex numbers, and calculating the k differential complex numbers to obtain k modulation complex numbers to form a corresponding modulation complex number sequence; multiplying a first section of waveform in the waveform sequence by a first modulation complex in a modulation complex sequence to obtain a first section of modulation waveform; multiplying a second section of waveform in the waveform sequence by a second modulation complex in the modulation complex sequence to obtain a second modulation waveform; obtaining k modulation waveforms by analogy to form a modulation waveform sequence; and transmitting the modulation waveform sequence.
In the context of the above modulation and coding methods, there is a need for an efficient method that enables two segments of coded sequences to be decoded separately, and that also ensures that the data packet is entirely correct.
Disclosure of Invention
The present invention provides a two-stage encoding and modulation transmitting method and a transmitting end, which overcome the above problems or at least partially solve the above problems, and according to a first aspect of the present invention, the present invention provides a two-stage encoding and modulation transmitting method, including:
performing first CRC coding on a bit sequence to be transmitted to obtain a first CRC check bit sequence;
dividing a bit sequence to be transmitted carrying the first CRC check bit sequence into a first section of bit sequence and a second section of bit sequence, and respectively carrying out channel coding on the first section of bit sequence and the second section of bit sequence to obtain a first coding sequence and a second coding sequence;
and performing signal modulation based on the first coding sequence and the second coding sequence, and transmitting the modulated signal.
Wherein, the channel coding is respectively performed on the first segment of bit sequence and the second segment of bit sequence to obtain a first coding sequence and a second coding sequence, and the channel coding comprises:
performing second CRC encoding on the first section of bit sequence to obtain a second CRC check bit sequence;
carrying out channel coding on a first section of bit sequence carrying the second CRC check bit sequence to obtain the first coding sequence;
and carrying out channel coding on the second segment of bit sequence to obtain the second coding sequence.
Wherein the channel coding comprises convolutional code coding or polar code coding.
Wherein the channel coding the first segment bit sequence carrying the second CRC check bit sequence to obtain the first coded sequence includes:
decoding the first coding sequence based on the second CRC check bit sequence to obtain a first decoding sequence;
decoding the second coding sequence based on the first decoding sequence and the first CRC check bit sequence to obtain a second decoding sequence;
and splicing the first decoding sequence and the second decoding sequence to obtain a sending bit sequence.
Wherein the performing signal modulation based on the first coding sequence and the second coding sequence and transmitting the modulated signal comprises:
converting every m bits in the first coding sequence into a corresponding section of waveform to obtain k sections of waveforms to form a corresponding waveform sequence;
converting every n bits in the second coding sequence into a differential complex number to obtain k differential complex numbers, and calculating the k differential complex numbers to obtain k modulation complex numbers to form a corresponding modulation complex number sequence;
and multiplying each section of waveform in the waveform sequence with each modulation complex number in the modulation complex number sequence in sequence to obtain k modulation waveforms to form a modulation waveform sequence, wherein the bit length of the first coding sequence is km, the bit length of the second coding sequence is kn, and k, m and n are integers more than 0.
Wherein, the converting every m bits in the first coding sequence into a corresponding segment of waveform to obtain k segments of waveforms to form a corresponding waveform sequence includes:
determine a set of 2mSegment candidate waveforms, wherein each segment of said candidate waveforms corresponds to 2 of m bitsmA combination condition in a combination;
based on various combination cases, from 2mAnd selecting a corresponding segment of candidate waveform from the segment candidate waveforms to be used as a segment waveform converted every m bits.
Wherein, 2 ismThe segment candidate waveforms are mutually orthogonal pairwise.
Wherein, each section of candidate waveform is a single-frequency signal with different frequencies.
Wherein, the calculating the k differential complex numbers to obtain k modulation complex numbers to form a corresponding modulation complex number sequence includes:
multiplying a first differential complex number of the k differential complex numbers by an initial modulation complex number to obtain a first modulation complex number;
multiplying a second differential complex number in the k differential complex numbers by the first modulation complex number to obtain a second modulation complex number;
and (4) iterating the process to obtain k modulation complex numbers to form a corresponding modulation complex number sequence.
According to a second aspect provided by the present invention, the present invention provides a transmitting end, including:
the CRC coding and checking module is used for carrying out first CRC coding on a bit sequence to be sent to obtain a first CRC checking bit sequence;
the coding module is used for dividing a bit sequence to be sent carrying the first CRC check bit sequence into a first section of bit sequence and a second section of bit sequence, and respectively carrying out channel coding on the first section of bit sequence and the second section of bit sequence to obtain a first coding sequence and a second coding sequence;
and the modulation sending module is used for carrying out signal modulation based on the first coding sequence and the second coding sequence and sending the modulated signals.
In the two-segment encoding, modulation sending method and sending end provided by the embodiment of the invention, for the condition that one segment of data needs to be encoded in two segments, the method not only ensures the error correction performance, but also ensures more CRC (cyclic redundancy check) bits, namely ensures the CRC error detection performance; the additional CRC encoding is carried out on the first section, so that the first section can obtain enough CRC bits, and the CRC error detection performance of the first section is ensured; the invention also provides a coding method with good error correction performance and good error detection performance for the orthogonal waveform differential phase modulation method.
Drawings
Fig. 1 is a flowchart illustrating a two-segment encoding and modulation transmission method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a process provided by an embodiment of the invention;
fig. 3 is a schematic structural diagram of a transmitting end according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Fig. 1 is a flowchart illustrating a two-segment encoding and modulation transmitting method according to an embodiment of the present invention, as shown in fig. 1, including:
101. performing first CRC coding on a bit sequence to be transmitted to obtain a first CRC check bit sequence;
102. dividing a bit sequence to be transmitted carrying the first CRC check bit sequence into a first section of bit sequence and a second section of bit sequence, and respectively carrying out channel coding on the first section of bit sequence and the second section of bit sequence to obtain a first coding sequence and a second coding sequence;
103. and performing signal modulation based on the first coding sequence and the second coding sequence, and transmitting the modulated signal.
It should be noted that, the execution main body in the embodiment of the present invention is the sending end, and it can be understood that, for each data sending process, the method provided in the embodiment of the present invention can be adopted, so that the original information bit sequence to be sent can be accurately decoded and obtained at the receiving end.
Fig. 2 is a process schematic diagram provided in an embodiment of the present invention, and as shown in fig. 2, taking 194bit information data to be transmitted as an example, first performing a first CRC check, where the length of the CRC check is c1, then adding a CRC check result to the original data, dividing the CRC check result into two pieces of data, then respectively encoding the two pieces of data to obtain a first coding sequence and a second coding sequence, where the bit length of the first coding sequence is km, the bit length of the second coding sequence is kn, and k, m, and n are integers greater than 0, and finally performing signal transmission.
Specifically, taking the content of fig. 2 as an example, first, in step 101, first CRC check is performed on 194 information bits to be transmitted, so as to obtain a first CRC check bit sequence with a length of 15, and the first CRC check bit sequence is placed at the tail of the 194 information bits to be transmitted, for a total of 209 bits.
Then, in step 102, the first 101 bits of the 209 bits are taken as a first segment bit sequence, the last 108 bits of the 209 bits are taken as a second segment bit sequence, then the first bit sequence is subjected to second CRC coding to obtain a second CRC check bit sequence with the length of 7, the second CRC check bit sequence carried by the tail of the first bit sequence is subjected to polarization code coding to obtain a first coding sequence with the length of 208, and the second bit sequence is subjected to polarization code coding to obtain a second coding sequence with the length of 208.
In step 103, converting every 2 bits in the first coding sequence into a corresponding segment of waveform, to obtain 104 segments of waveforms in total, and forming a corresponding waveform sequence; converting every 2 bits in the second coding sequence into a differential complex number to obtain 104 differential complex numbers, and multiplying a first section of waveform in the waveform sequence with a first modulation complex number in the modulation complex number sequence to obtain a first section of modulation waveform; and multiplying the second section of waveform in the waveform sequence by the second modulation complex number in the modulation complex number sequence to obtain a second modulation waveform, and repeating the steps to obtain 104 modulation waveforms to form a modulation waveform sequence, and sending the modulation waveform sequence.
It can be understood that, correspondingly at the receiving end, the received waveform sequence is demodulated to obtain a first demodulation code word and a second demodulation code word;
and carrying out polar code Serial Cancellation List (SCL) decoding on the first demodulation code word, wherein the size of the list is 8, and taking out a corresponding decision sequence on one path which meets the second CRC check and has the largest path metric value from 8 paths to obtain the first decoding code word.
And carrying out polar code SCL decoding on the second demodulation code word, wherein the size of the list is 8, traversing 8 paths, splicing with the first decoding code word, and taking out a corresponding decision sequence on one path which meets the first CRC check and has the maximum path metric value to obtain the second decoding code word.
And finally, splicing the second decoding code word to the tail part of the first decoding code word to obtain the original information bit sequence to be sent.
In the two-segment encoding and modulation transmitting method and the transmitting end provided by the embodiment of the invention, for the condition that one segment of data needs to be encoded in two segments, the method not only ensures the error correction performance, but also ensures more CRC bit numbers, namely the CRC error detection performance, the additional CRC encoding on the first segment can ensure that the first segment obtains enough CRC bit numbers, the CRC error detection performance of the first segment is ensured, and meanwhile, the encoding method with good error correction performance and good error detection performance is provided for the orthogonal waveform differential phase modulation method.
On the basis of the foregoing embodiment, the performing channel coding on the first segment of bit sequence and the second segment of bit sequence to obtain a first coded sequence and a second coded sequence includes:
performing second CRC encoding on the first section of bit sequence to obtain a second CRC check bit sequence;
carrying out channel coding on a first section of bit sequence carrying the second CRC check bit sequence to obtain the first coding sequence;
and carrying out channel coding on the second segment of bit sequence to obtain the second coding sequence.
On the basis of the above embodiment, the channel coding includes convolutional code coding or polar code coding.
It is to be understood that the embodiments of the present invention may use convolutional codes for channel coding or polar codes for channel coding. Preferably polar code encoding.
On the basis of the foregoing embodiment, the performing channel coding on the first segment of bit sequence carrying the second CRC check bit sequence to obtain the first coded sequence includes:
decoding the first coding sequence based on the second CRC check bit sequence to obtain a first decoding sequence;
decoding the second coding sequence based on the first decoding sequence and the first CRC check bit sequence to obtain a second decoding sequence;
and splicing the first decoding sequence and the second decoding sequence to obtain a sending bit sequence.
On the basis of the above embodiment, the performing signal modulation based on the first coding sequence and the second coding sequence, and transmitting a modulated signal includes:
converting every m bits in the first coding sequence into a corresponding section of waveform to obtain k sections of waveforms to form a corresponding waveform sequence;
converting every n bits in the second coding sequence into a differential complex number to obtain k differential complex numbers, and calculating the k differential complex numbers to obtain k modulation complex numbers to form a corresponding modulation complex number sequence;
and multiplying each section of waveform in the waveform sequence with each modulation complex number in the modulation complex number sequence in sequence to obtain k modulation waveforms to form a modulation waveform sequence, wherein the bit length of the first coding sequence is km, the bit length of the second coding sequence is kn, and k, m and n are integers more than 0.
It is understood that the first segment of the waveform in the waveform sequence is multiplied by the first modulated complex in the modulated complex sequence to obtain a first segment of modulated waveform; multiplying a second section of waveform in the waveform sequence by a second modulation complex in the modulation complex sequence to obtain a second modulation waveform; and obtaining k modulation waveforms by analogy to form a modulation waveform sequence.
On the basis of the foregoing embodiment, the converting every m bits in the first coding sequence into a corresponding segment of waveform to obtain k segments of waveforms, and forming a corresponding waveform sequence includes:
determine a set of 2mSegment candidate waveforms, wherein each segment of said candidate waveforms corresponds to 2 of m bitsmA combination condition in a combination;
based on various combination cases, from 2mAnd selecting a corresponding segment of candidate waveform from the segment candidate waveforms to be used as a segment waveform converted every m bits.
On the basis of the above embodiment, 2mThe segment candidate waveforms are mutually orthogonal pairwise.
On the basis of the above embodiment, each candidate waveform is a single-frequency signal with different frequencies.
On the basis of the foregoing embodiment, the calculating the k differential complex numbers to obtain k modulation complex numbers to form a corresponding modulation complex number sequence includes:
multiplying a first differential complex number of the k differential complex numbers by an initial modulation complex number to obtain a first modulation complex number;
multiplying a second differential complex number in the k differential complex numbers by the first modulation complex number to obtain a second modulation complex number;
and (4) iterating the process to obtain k modulation complex numbers to form a corresponding modulation complex number sequence.
Fig. 3 is a schematic structural diagram of a transmitting end according to an embodiment of the present invention, as shown in fig. 3, including: a CRC code check module 301, a coding module 302, and a modulation transmission module 303, wherein:
the CRC code checking module 301 is configured to perform a first CRC code on a bit sequence to be transmitted, so as to obtain a first CRC check bit sequence;
the encoding module 302 is configured to divide a bit sequence to be transmitted, which carries the first CRC check bit sequence, into a first segment of bit sequence and a second segment of bit sequence, and perform channel encoding on the first segment of bit sequence and the second segment of bit sequence, respectively, to obtain a first encoded sequence and a second encoded sequence;
the modulation transmitting module 303 is configured to perform signal modulation based on the first coding sequence and the second coding sequence, and transmit a modulated signal.
The present embodiments provide a non-transitory computer-readable storage medium storing computer instructions that cause the computer to perform the methods provided by the above method embodiments, for example, including: performing first CRC coding on a bit sequence to be transmitted to obtain a first CRC check bit sequence; dividing a bit sequence to be transmitted carrying the first CRC check bit sequence into a first section of bit sequence and a second section of bit sequence, and respectively carrying out channel coding on the first section of bit sequence and the second section of bit sequence to obtain a first coding sequence and a second coding sequence; and performing signal modulation based on the first coding sequence and the second coding sequence, and transmitting the modulated signal.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, the method of the present application is only a preferred embodiment and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A two-segment encoding and modulation transmission method, comprising:
performing first CRC coding on a bit sequence to be transmitted to obtain a first CRC check bit sequence;
dividing a bit sequence to be transmitted carrying the first CRC check bit sequence into a first section of bit sequence and a second section of bit sequence, and respectively carrying out channel coding on the first section of bit sequence and the second section of bit sequence to obtain a first coding sequence and a second coding sequence;
and performing signal modulation based on the first coding sequence and the second coding sequence, and transmitting the modulated signal.
2. The two-segment encoding and modulation transmitting method according to claim 1, wherein said channel-coding the first segment bit sequence and the second segment bit sequence to obtain a first coded sequence and a second coded sequence comprises:
performing second CRC encoding on the first section of bit sequence to obtain a second CRC check bit sequence;
carrying out channel coding on a first section of bit sequence carrying the second CRC check bit sequence to obtain the first coding sequence;
and carrying out channel coding on the second segment of bit sequence to obtain the second coding sequence.
3. The two-stage encoding method according to claim 2, wherein said channel encoding comprises convolutional code encoding or polar code encoding.
4. The two-stage encoding and modulation transmitting method according to claim 3, wherein said channel-coding the first segment bit sequence carrying the second CRC check bit sequence to obtain the first coded sequence comprises:
decoding the first coding sequence based on the second CRC check bit sequence to obtain a first decoding sequence;
decoding the second coding sequence based on the first decoding sequence and the first CRC check bit sequence to obtain a second decoding sequence;
and splicing the first decoding sequence and the second decoding sequence to obtain a sending bit sequence.
5. The two-stage encoding and modulation transmitting method according to claim 3, wherein the performing signal modulation based on the first encoding sequence and the second encoding sequence and transmitting the modulated signal comprises:
converting every m bits in the first coding sequence into a corresponding section of waveform to obtain k sections of waveforms to form a corresponding waveform sequence;
converting every n bits in the second coding sequence into a differential complex number to obtain k differential complex numbers, and calculating the k differential complex numbers to obtain k modulation complex numbers to form a corresponding modulation complex number sequence;
and multiplying each section of waveform in the waveform sequence with each modulation complex number in the modulation complex number sequence in sequence to obtain k modulation waveforms to form a modulation waveform sequence, wherein the bit length of the first coding sequence is km, the bit length of the second coding sequence is kn, and k, m and n are integers more than 0.
6. The two-segment encoding and modulation transmitting method of claim 5, wherein the converting every m bits in the first encoded sequence into a corresponding segment of waveform to obtain k segments of waveforms to form a corresponding waveform sequence comprises:
determine a set of 2mSegment candidate waveforms, wherein each segment of said candidate waveforms corresponds to 2 of m bitsmA combination condition in a combination;
based on various combination cases, from 2mAnd selecting a corresponding segment of candidate waveform from the segment candidate waveforms to be used as a segment waveform converted every m bits.
7. The two-stage encoding and modulation transmission method according to claim 6, wherein said 2mThe segment candidate waveforms are mutually orthogonal pairwise.
8. The two-stage encoding and modulation transmitting method according to claim 7, wherein each of the candidate waveforms is a single frequency signal with different frequencies.
9. The two-stage encoding and modulation transmitting method according to claim 8, wherein said calculating k differential complex numbers to obtain k modulation complex numbers to form a corresponding modulation complex number sequence comprises:
multiplying a first differential complex number of the k differential complex numbers by an initial modulation complex number to obtain a first modulation complex number;
multiplying a second differential complex number in the k differential complex numbers by the first modulation complex number to obtain a second modulation complex number;
and (4) iterating the process to obtain k modulation complex numbers to form a corresponding modulation complex number sequence.
10. A transmitting end, comprising:
the CRC coding and checking module is used for carrying out first CRC coding on a bit sequence to be sent to obtain a first CRC checking bit sequence;
the coding module is used for dividing a bit sequence to be sent carrying the first CRC check bit sequence into a first section of bit sequence and a second section of bit sequence, and respectively carrying out channel coding on the first section of bit sequence and the second section of bit sequence to obtain a first coding sequence and a second coding sequence;
and the modulation sending module is used for carrying out signal modulation based on the first coding sequence and the second coding sequence and sending the modulated signals.
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