Research on Designing Encoder for a Class of LDPC Codes with Low-Complexity and High-Performance

ZHANG Wei; ZHU Guang-xi; PENG Li; SHEN Qiong-xia

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Research on Designing Encoder for a Class of LDPC Codes with Low-Complexity and High-Performance

更新时间：2026-09-04

- Research on Designing Encoder for a Class of LDPC Codes with Low-Complexity and High-Performance
- Vol. 27, Issue 3, Pages: 38-42(2010)
- 作者机构：
  
  华中科技大学电信系光电国家实验室光通信与智能网络部,湖北,武汉,430074
- 作者简介：
- 基金信息：
- DOI：
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- Published：2010
- 稿件说明：
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张伟, 朱光喜, 彭立, 沈琼霞. 一种高性能低复杂度LDPC码编码器设计研究[J]. 微电子学与计算机, 2010, 27(3): 38-42.

ZHANG Wei, ZHU Guang-xi, PENG Li, et al. Research on Designing Encoder for a Class of LDPC Codes with Low-Complexity and High-Performance[J]. 2010, 27(3): 38-42.
张伟, 朱光喜, 彭立, 沈琼霞. 一种高性能低复杂度LDPC码编码器设计研究[J]. 微电子学与计算机, 2010, 27(3): 38-42. DOI：

ZHANG Wei, ZHU Guang-xi, PENG Li, et al. Research on Designing Encoder for a Class of LDPC Codes with Low-Complexity and High-Performance[J]. 2010, 27(3): 38-42. DOI：

摘要

提出一种基于列差搜索法 (Column-Difference Search Algorithm) 和迭代填充法 (Iterative Filled Algorithm) 的准循环LDPC码构造方法

可以设计任意围长和码率的QC-LDPC码 (称为CI-LDPC码) .利用该码校验矩阵的近似下三角特性

推导出递推编码方法

使得该码编码复杂度与码长成线性关系.仿真结果表明

CI-LDPC码在BER性能上与随机码以及同属QC-LDPC码的Tanner码和Array码相比有明显提高

优于随机码、Tanner码和Array码1.4dB~3.8dB.

Abstract

In this paper

a novel method based on Column-Difference Search Algorithm and Iterative Filled Algorithm is proposed to design Quasi-Cyclic LDPC codes with arbitrary girth and code rate.Due to its almost lower triangular form

CI-LDPC code has linear encoding complexity.The experimental results show that CI-LDPC codes perform better than Tanner codes and Array codes

which are another two classical QC-LDPC codes

and random codes.The code in this paper outperforms random code

Tanner code and Array code by 1.4dB~3.8dB.

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