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Code word encoding method, system and medium of ldpc code word structure

A technology of LDPC codes and coding methods, which is applied in the direction of coding, error detection coding using multiple parity bits, coding components, etc., can solve the problems of high coding complexity and unsuitability for wide application, and achieve simple coding and high performance. Good results

Active Publication Date: 2022-01-28
SHANGHAI JIAOTONG UNIV
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Problems solved by technology

[0003] Although the initial random codeword encoding of LDPC is not subject to any structural constraints, the degree distribution design has a greater degree of freedom, and it is easier to obtain a degree distribution approaching the Shannon limit, but the encoding complexity is extremely high, and it is not suitable for wide application.

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  • Code word encoding method, system and medium of ldpc code word structure
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  • Code word encoding method, system and medium of ldpc code word structure

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Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0030] The invention provides an encoding scheme of LDPC codes, a corresponding encoding code table, and describes the corresponding code word structure and encoding method in detail.

[0031] An LDPC code word encoding method, the code word structure is a QC-IRA structure, a check matrix H includes M rows and N columns, and the N columns include K information bits and M check bits. Wherein: the K is the information bit length of the LDPC codeword, the N is the codeword length of the LDPC codeword, and ...

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Abstract

The present invention provides a code word encoding method, system and medium of an LDPC code word structure, and a corresponding code table, the code word structure is a QC-IRA structure, and the parity check matrix H includes M rows and N columns, The N columns include K information bits and M parity bits, wherein: the K is the information bit length of the LDPC codeword, the N is the codeword length of the LDPC codeword, and N=K+M. The encoding method includes: initializing the check digit; accumulating information bits to the check digit according to the encoding code table; and accumulating the check digit. The coding method has the characteristics of simple coding and good performance.

Description

technical field [0001] The present invention relates to the technical field of communication coding, in particular to a codeword coding method, system and medium of an LDPC codeword structure, and a corresponding code table. Background technique [0002] In 1963, Gallager proposed the low density parity check code LDPC (LowDensity Parity Check) for the first time in his doctoral dissertation, and at the same time deduced its decoding method based on the iterative principle, and proved the iterative decoding method The important conclusion that the complexity of the code grows linearly with the code length. However, due to the complexity of the original iterative decoding algorithm and the slow development of integrated circuit technology at that time, LDPC codewords did not receive much attention at that time. Subsequently, in the 1990s, Turbo codes based on iterative decoding mechanisms were found to be a coding scheme that could approach the Shannon limit. Only then did p...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M13/11
CPCH03M13/1148
Inventor 徐胤高娜鞠灏何大治张文军张根宁黄秀璇
Owner SHANGHAI JIAOTONG UNIV