北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2004, Vol. 27 ›› Issue (2): 48-53.

• 论文 • 上一篇    下一篇

LDPC码在RICE信道中的性能分析

林家儒, 吴伟陵   

  1. 北京邮电大学 信息工程学院, 北京 100876
  • 收稿日期:2003-01-14 出版日期:2004-02-28
  • 作者简介: 林家儒(1958—),男,北京邮电大学教授。 E-mail:jrlin@public.bta.net.cn
  • 基金资助:
    国家自然科学基金资助项目(60272052)

Analysis of Performance of LDPC on Rician-Fading Channels

LIN Jia-ru, WU Wei-ling   

  1. Information Engineering School, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2003-01-14 Online:2004-02-28

摘要: 对非规则LDPC(low density parity codes)码在RICE信道的性能进行了分析和仿真,修正了BP(belief propagation)译码算法,证明了RICE信道满足对称性,给出了RICE信道译码稳定性条件,推导出了RICE信道的Shannon容量限。采用VC编程进行了仿真,仿真结果表明在码长N=3 072、码率R=1/3时,与Shannon限相差2 dB左右。进一步表明了LDPC码在包括RICE信道在内的各种信道中的性能都是非常优良的。

关键词: 低密度校验码, 衰落信道, 莱斯信道

Abstract: This paper analyzes and simulates the performance of low density parity check codes (LDPC) on Rician fading channels, and modifies BP decoding algorithm, provesthe symmetry and shows the stability conditions of the channels calculates theShannon limit of Rician channels. Using Visual C++ programming to simulate the performance, the result indicates that when code length N=3 072, coderate R=1/3, the distance with Shannon limit is about 2 dB. The performance of LDPC is also very effective on all kind of channels, including Rician channels.

Key words: LDPC, fading channel, RICIAN channels

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