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LDPC码编码的DP-HARQ协议多层译码算法及性能分析
引用本文:王芳,程时昕,陈明,王海峰. LDPC码编码的DP-HARQ协议多层译码算法及性能分析[J]. 应用科学学报, 2007, 25(4): 337-341
作者姓名:王芳  程时昕  陈明  王海峰
作者单位:1.东南大学移动通信国家重点实验室,江苏 南京 210096; ;2.TP Oulu, NOKIA, Oulu, Finland 90570
摘    要:针对数据打孔的II型HARQ协议提出了一种多层译码算法。与传统的两层译码算法相比,多层译码算法充分利用了重传码字的纠错能力,能够提高系统吞吐量。该文描述了如何利用密度演进算法分析LDPC编码的、采用多层译码算法的DP-HARQ协议的性能,分析和数值仿真结果表明,如果选择恰当的打孔率,在低信噪比范围内,多层译码算法可以明显提高系统的吞吐量。

关 键 词:数据打孔的混合自动重传请求协议  低密度奇偶校验码  多层译码  密度演进  
文章编号:0255-8297(2007)04-0337-05
收稿时间:2006-10-13
修稿时间:2006-10-132007-04-29

Multi-level Decoding of DP-HARQ Proticol with LDPC Coding and Performance Evaluation
WANG Fang,CHENG Shi-xin,CHEN Ming,WANG Hai-feng. Multi-level Decoding of DP-HARQ Proticol with LDPC Coding and Performance Evaluation[J]. Journal of Applied Sciences, 2007, 25(4): 337-341
Authors:WANG Fang  CHENG Shi-xin  CHEN Ming  WANG Hai-feng
Affiliation:1.National Mobile Communications Research Laboratory,Southeast University,Nanjing 210096,China;2.TP Oulu,NOKIA,Oulu 90570,Finland
Abstract:A novel decoding algorithm, multi-level decoding, for data puncturing type-II hybrid-ARQ protocol is proposed in this paper. Compared to the conventional two-level decoding, the proposed algorithm makes full use of error-correcting capability of each punctured codeword to improve the system performance. Performance evaluation for the multi-level decoding algorithm with density evolution is made. Analysis and numerical simulation results show that, if a proper puncturing rate is chosen, the multi-level decoding algorithm can improve the throughput performance by a few tenths of a decibel at lower SNR.
Keywords:DP-HARQ  LDPC codes  multi-level decoding  density evolution
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