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The construction method of the template matrix of single code rate, multi-code rate qc-ldpc code

A template matrix and construction method technology, applied in the field of digital communication coding, can solve the problems of inability to take into account different template sizes, inability to take into account high and low bit rates, and inability to take into account multiple bit rates, etc., to achieve good performance and versatility. Effect

Active Publication Date: 2017-07-28
TSINGHUA UNIV +1
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Problems solved by technology

[0010] However, in the existing QC-LDPC template matrix, that is, the base matrix T, the difference between high and low code rates cannot be considered at the same time, the transmission of multiple code rates cannot be considered, and the size of different templates cannot be considered at the same time.

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  • The construction method of the template matrix of single code rate, multi-code rate qc-ldpc code
  • The construction method of the template matrix of single code rate, multi-code rate qc-ldpc code
  • The construction method of the template matrix of single code rate, multi-code rate qc-ldpc code

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[0054] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0055] In this embodiment, "first", "second", "third", and "fourth" are just to distinguish the matrices, and do not limit the sequence of the matrices.

[0056] figure 1 The schematic flow chart of the construction method of the template matrix of a kind of single code rate QC-LDPC code that the embodiment of the present invention provides, as ...

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Abstract

The invention provides a single-code-rate and multiple-code-rate QC-LDPC code template matrix construction method. The single-code-rate QC-LDPC code template matrix construction method comprises the following steps: obtaining a first submatrix X, a second submatrix Y, a third submatrix Z and a fourth submatrix I; and constructing a template matrix T according to the first submatrix X, the second submatrix Y, the third submatrix Z and the fourth submatrix I, wherein the fourth submatrix I is a unit matrix. The single-code-rate and multiple-code-rate QC-LDPC code template matrix construction method has better performance and versatility, can take low and high code rates, different and various code rates and different sizes of the template matrix into equal consideration, and can guarantee to realize LDPC coding and decoding in lower hardware resources.

Description

technical field [0001] The invention relates to the technical field of digital communication coding, in particular to a method for constructing a template matrix of a single-code-rate, multi-code-rate QC-LDPC code. Background technique [0002] In the field of communication, channel coding technology is usually used to ensure the reliability of communication in noisy channels. In the satellite communication system, due to the influence of geographical environment factors, there are a large number of noise sources. In theory, the communication channel has a maximum communication capacity, that is, the Shannon limit, which can be expressed by the bit rate under a specific SNR condition. Among them, an error control code close to the Shannon limit is a low-density parity-check code (Low Density Parity Check, referred to as LDPC). LDPC is a kind of special linear block code based on sparse parity check matrix. It is usually described by parity check matrix H. The nullification...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M13/11
Inventor 彭克武陈霜杨昉潘长勇刘玥宋健
Owner TSINGHUA UNIV
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