J4 ›› 2010, Vol. 37 ›› Issue (3): 412-416.doi: 10.3969/j.issn.1001-2400.2010.03.005

• 研究论文 • 上一篇    下一篇

一类具有低密度生成矩阵的非二元准循环LDPC码

陈超;白宝明;王新梅   

  1. (西安电子科技大学 综合业务网理论及关键技术国家重点实验室,陕西 西安  710071)
  • 收稿日期:2009-05-19 出版日期:2010-06-20 发布日期:2010-07-23
  • 通讯作者: 陈超
  • 作者简介:陈超(1981-),男,西安电子科技大学博士研究生,E-mail: chenchaoxidian@gmail.com.
  • 基金资助:

    111工程资助项目(B08038);国家自然科学基金资助项目(U0635003);国家高科技863重大项目资助项目(2006AA01Z267)

A class of nonbinary quasi-cyclic LDPC codes with a low-density generator matrix

CHEN Chao;BAI Bao-ming;WANG Xin-mei   

  1. (State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an  710071, China)
  • Received:2009-05-19 Online:2010-06-20 Published:2010-07-23
  • Contact: CHEN Chao

摘要:

提出一类非二元准循环低密度校验(QC-LDPC)码,其校验矩阵的列重为2.通过精心设计校验矩阵,使得对应的生成矩阵具有一些优良的性质: 系统性; 准循环; 低密度.因此,可通过简单的移位寄存器电路实现低复杂度并行编码.仿真结果表明,提出的码和随机码的性能相当.

关键词: 低密度校验码, 非二元, 准循环, 低密度生成矩阵, 并行编码

Abstract:

This paper presents a class of nonbinary quasi-cyclic low-density parity-check (QC-LDPC) codes, whose parity-check matrix consists of weight-2 columns. The parity-check matrix is carefully designed such that the corresponding generator matrix has some nice properties: (1) systematic, (2) quasi-cyclic, and (3) low-density, which allow a parallel encoding with low-complexity through simple shift-register circuits. Simulation results show that the proposed codes do not have performance degradation compared with randomly constructed codes.

Key words: low-density parity-check (LDPC) codes, nonbinary, quasi-cyclic (QC), low-density generator matrix, parallel encoding