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LDPC码的快速编码研究

王鹏;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:1900-01-01 修回日期:1900-01-01 出版日期:2004-12-20 发布日期:2004-12-20

Study of efficient encoding of LDPC codes

WANG Peng;WANG Xin-mei

  

  1. (State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an 710071, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2004-12-20 Published:2004-12-20

摘要: 根据LDPC码在删除信道下的译码算法重新阐述了基于稀疏校验矩阵码的快速编码方法,同时指出了Tornado码和RA码能够达到线性编码的原因.文中通过对快速编码的实现进行分析,提出了两种能够达到线性复杂度编码的码构造方法,仿真结果表明,采用这些方法构造的LDPC码在AWGN信道下的纠错性能不差于随机构造的LDPC码.

关键词: LDPC码, 删除信道, 快速编码, AWGN信道

Abstract: The efficient encoding problem of LDPC codes is studied. Based on the decoding algorithm for LDPC codes under erasure channels and the sparseness of their parity-check matrices, an efficient encoding method for LDPC codes is described and further explained via two classes of linearly encode-able codes. The practical implementation of this method is discussed in detail and two code construction approaches are presented. Simulation results show that the LDPC codes constructed here work no worse than random ones under AWGN channels.

Key words: LDPC codes, erasure channel, efficient encoding, AWGN channel

中图分类号: 

  • TN911.22