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A low-complexity low-density parity-check ldpc code encoding circuit structure

A low-density parity, LDPC code technology, applied in the field of digital signals and systems, can solve problems such as high coding complexity and coding delay

Inactive Publication Date: 2015-09-30
东南大学无锡分校
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of the main problems faced by LDPC codes is its high coding complexity and coding delay
If the common encoding method is used, the LDPC code encoder has an encoding complexity that is quadratic with the code length, which is unacceptable when the code length is long

Method used

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  • A low-complexity low-density parity-check ldpc code encoding circuit structure
  • A low-complexity low-density parity-check ldpc code encoding circuit structure
  • A low-complexity low-density parity-check ldpc code encoding circuit structure

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Embodiment Construction

[0042] In order to better understand the present invention, a more detailed description will be given below in conjunction with specific implementations and the system.

[0043] The technical scheme of the present invention is an error correction coding circuit structure for low-density parity-check codes applied to communication systems. The circuit structure performs branch operations according to the LDPC code check matrix, and then obtains the check code of the input information sequence Word, to achieve low-complexity coding of quasi-cyclic LDPC codes with approximate lower triangular form; the details are as follows:

[0044] The coding circuit structure is aimed at the quasi-cyclic LDPC code whose parity check matrix is ​​approximately lower triangle; the parity check matrix H of the LDPC code with this characteristic is generally expressed in the form of block, where each matrix block after block is very large Part of it is a zero matrix, and other matrices are the result o...

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Abstract

The invention discloses a low-complexity code circuit structure of a low density parity check (LDPC) code. The code circuit structure of the LDPC code comprise a multiplication circuit, an add operation circuit and a control circuit. The code circuit structure and the check matrix of the LDPC code carry out row operation through an original input uncoded information sequence, and finally the row operation is achieved by gaining a check sequence. The code circuit structure aims at a quasi-cyclic LDPC code with a code rate greater than 0.5 and a similar lower triangular form, adopts a mode that operation is carried out according to the rows of the check matrix of the LDPC, reduces hardware resources, adopts an operate mode of being partially parallel, guarantees the data handling capacity of a code circuit, and achieves the low-complexity encoding of the quasi-cyclic LDPC code with the similar lower triangular form.

Description

Technical field [0001] The invention belongs to the field of digital signals and systems, and relates to the realization of an LDPC code error correction coding circuit in the data transmission error correction technology. Specifically, it relates to the realization of an encoding circuit for an LDPC code with an approximate lower triangular quasi-cyclic structure, which is a low-complexity LDPC code encoding circuit structure. Background technique [0002] The purpose of communication is to transmit the information that the other party does not know to the other party in a timely and reliable manner, and to improve the reliability and effectiveness of information transmission, which is always the goal pursued by communication work. Channel coding is a kind of anti-interference technology and method specially designed to ensure the transmission reliability of the communication system and overcome the noise and interference in the channel. It artificially adds some necessary chec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M13/11
Inventor 张萌王涛郭良谦吴建辉蔡琰谈其凤田茜
Owner 东南大学无锡分校
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