J4 ›› 2010, Vol. 37 ›› Issue (4): 705-709.doi: 10.3969/j.issn.1001-2400.2010.04.022

• 研究论文 • 上一篇    下一篇

一类逼近容量LDPC纠删码的二部图构造算法

慕建君1,2,3;焦晓鹏1,2,3;曹训志1
  

  1. (1. 西安电子科技大学 计算机学院,陕西 西安  710071;
    2. 西南交通大学 信息编码与传输四川省重点实验室,四川 成都  610031;
    3. 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:2009-04-03 出版日期:2010-08-20 发布日期:2010-10-11
  • 通讯作者: 慕建君
  • 作者简介:慕建君(1965-),男,教授,博士,E-mail: jjmu@xidian.edu.cn.
  • 基金资助:

    西南交通大学信息编码与传输四川省重点实验室开放研究基金资助项目; 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开放基金资助项目(ISN10-04)

The construction algorithm of bipartite graphs for a type of capacity-approaching LDPC erasure codes

MU Jian-jun1,2,3;JIAO Xiao-peng1,2,3;CAO Xun-zhi1   

  1. (1. School of Computer Science and Technology, Xidian Univ., Xi'an  710071, China;
    2. Key Lab. of Information Coding and Transmission, Southwest Jiaotong Univ., Chengdu  610031, China;
    3. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an  710071, China)
  • Received:2009-04-03 Online:2010-08-20 Published:2010-10-11
  • Contact: MU Jian-jun

摘要:

Tornado码是一类重要的LDPC码. 证明了Heavy-Tail/Poisson度序列可逼近删除信道容量. 提出了Tornado码设计中随机二部图的连边构造算法. 通过分析Heavy-Tail/Poisson度序列的分布,提出了设计Tornado码的一个参数选取原则. 仿真实验证明了这一选取原则的合理性. 随机二部图的连边构造算法及其参数选取原则有助于Tornado码的设计及其工程应用.

关键词: LDPC码, Tornado 码, 逼近容量序列, 二部图构造算法

Abstract:

Tornado code is an important kind of low-density parity-check codes. It is shown that the Heavy-Tail/Poisson sequence is capable of achieving the capacity of the binary erasure channel. The construction algorithm for random bipartite graphs in the design of Tornado codes is proposed in this paper. By analyzing the distribution of Heavy-Tail/Poisson degree sequences of Tornado codes, a parameter-selection rule used to design Tornado codes is presented. Simulation results show the correctness of the parameter-selection rule. The construction algorithm for random bipartite graphs and the parameter-selection rule presented will be helpful in the design and its engineering application of Tornado codes.

Key words: low-density parity-check codes, Tornado codes, capacity-achieving sequence, construction algorithm of bipartite graphs