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Multi-ary code modulation mapping method and device

A modulation mapping and multivariate technology, applied in the field of communication, which can solve the problems of unbalanced reliability and low reliability.

Active Publication Date: 2018-12-07
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of this, the present invention is to provide a multi-ary code modulation mapping method and device to overcome the unbalanced reliability characteristics of constellation points in the constellation diagram and the low reliability problems caused by deep fading

Method used

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  • Multi-ary code modulation mapping method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0124] Such as figure 1 As shown, this embodiment provides a multi-ary code modulation mapping method, the method comprising:

[0125] Step S110: Perform multivariate domain encoding on the first sequence including K multivariate code words to obtain a second sequence including N multivariate code words; wherein, said N=K / u, and said K is not less than 1 is an integer, the u is a code rate, and the value is a positive number not greater than 1;

[0126] Step S120: Calculate K according to the number of elements in the multivariate field q and the modulation order M 1 and K 2 ; where K 1 * log 2 q=K 2 * log 2 M, and the K 1 and K 2 Both are integers not less than 2, and both q and M are powers of 2; the number of elements in the multivariate field is the total number of multivariate code words in the multivariate field;

[0127] Step S130: put the second sequence in K 1 multi-element code word is a group, is divided into z multi-element code groups; Wherein, said ...

example 1

[0205] This example is an application example of the multi-ary code modulation mapping method based on direct full mapping. Such as figure 2 with image 3 As shown, the first sequence is A 0 ,A 1 ,...,A K-1 Including K multi-code codewords; where A l Represents a multi-element code word; said l is a natural number smaller than K. Natural numbers include zero and positive integers. The first sequence is subjected to GF (8) low-density parity check (Low-density Parity-check, LDPC) coding, obtains the second sequence B comprising N multi-code codewords 0 ,B 1 ,...,B N-1 . Wherein, the size of N depends on K and the code rate of the multi-element field coding.

[0206] Let α be the primitive element on the Gala field GF(q)(q>2), α -∞ =0, each power of α 0 =1,α,…,α q-2 constitutes all the field elements on the GF(q) field, and these field elements form a cyclic group. By using primitive polynomial transformation, each power of α can be transformed into p=log of α 2 ...

example 2

[0223] This example is a specific application example based on one of the I / Q way mapping methods.

[0224] Such as Figure 4 with Figure 5 As shown, the first: will include the first sequence A of K multi-code codewords 0 ,A1 ,...,A K-1 Carry out GF (64) LDPC encoding, obtain the second sequence B of N multiple code code words 0 ,B 1 ,...,B N-1 .

[0225] Second: If it is necessary to perform 16QAM modulation mapping on the codeword sequence of the multivariate code, q=64, M=16, K is calculated by formula (1) and formula (2) 1 = 2,K 2 =3; Among them, the formula (1):

[0226]

[0227] Formula (2): K 2 = K 1 *p / m.

[0228] The third: add behind the second sequence comprising N multi-code codewords zero codewords, and then add the back length to the back The multi-element code code word sequence is grouped by 2 multi-element code code words.

[0229] Fourth: the 2 encoded GF(64) domain multi-code codewords [C i,0 C i,1 ], where the jth GF(64) domain multi-...

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Abstract

The invention discloses a multi-ary code modulation mapping method and device, relates to the communication field, and is designed for improving communication reliability. The method includes: performing multi-field encoding on the first sequence including K multi-ary codes to obtain a second sequence including N multi-ary codes; calculating K1 and K2 according to the number of elements in the multi-element field q and the modulation order M; wherein K1 *log2q=K2*log2M, and both K1 and K2 are integers not less than 2, and both q and M are powers of 2; the second sequence is divided into K1 multi-codes as a group Z multiple code groups; wherein, the representation is rounded up; each of the multiple code groups is mapped to a constellation diagram to form K2 M-order modulation symbols; the M-order modulation symbols of z groups are sequentially concatenated to form The modulation symbol to be sent.

Description

technical field [0001] The present invention relates to modulation technology in the communication field, in particular to a multi-ary code modulation mapping method and device. Background technique [0002] In the process of signal modulation and demodulation, the constellation diagram is often used to visually represent the relationship between signals. Specifically, during the modulation process, the symbols carrying communication information are mapped to the constellation points in the constellation diagram. In the demodulation process, The received signal is judged in the constellation diagram to obtain communication information and so on. [0003] However, constellation diagrams have the following properties: [0004] 1): The reliability of the bits contained in each constellation point on the constellation diagram used for modulation mapping is different. Specifically, if the xth bit of constellation point A is the same as or most of the xth bits of the surrounding...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L27/34
CPCH03M13/1171H03M13/255H04L1/0041H04L1/0058H04L27/36H04L1/0071H04L1/0066H04L1/1893H04L27/3405H03M13/1157
Inventor 段灿徐俊许进郁光辉佟宁宁赵旦峰周相超
Owner ZTE CORP
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