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码率自适应LDPC码删余算法 被引量：4

Puncturing Algorithm for Design Rate-Compatible LDPC Code
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摘要 鉴于无线通信信道的时变特性,信道纠错编码必须具备码率自适应的功能.现有的分组拣选算法尽管能构造出性能优秀的码率自适应删余型LDPC码,但达到的最高删余码率受到限制.对此,该文提出一种新的删余算法-分层拣选算法,解决了最高删余码率受限的问题,使码率能够无限接近1,且适用于任意LDPC码.AWGN信道下的仿真结果表明,所提出的算法较分组拣选算法具有更好的性能. Rate compatibility of forward error correction codes is required to accomplish high throughput and reliability over time-varying wireless channels.The grouping and sorting（GS） algorithm can produce rate-compatible puncturing LDPC（RCP-LDPC） codes with good performance.However,there is a limit in the achievable highest puncturing rate.In this paper,a novel layer-by-layer sorting algorithm is proposed to design RCP-LDPC without any limitation in the highest puncturing rate.The algorithm can be applied to an arbitrary LDPC code to obtain a code rate infinitely close to one.Simulation over AWGN channels shows that the proposed algorithm has superior performance as compared to the GS algorithm.
作者 肖旻 黎勇 王琳
机构地区 厦门大学通信工程系
出处 《应用科学学报》 EI CAS CSCD 北大核心 2011年第4期385-389,共5页 Journal of Applied Sciences
基金 国家自然科学基金(No.60972053) 福建省自然科学基金(No 2008J0035)资助
关键词 码率自适应 LDPC码 删余 分组拣选 分层拣选 rate-compatible low density parity check（LDPC） codes puncturing grouping and sorting sorting layer by layer
分类号 TN911.22 [电子电信—通信与信息系统]
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参考文献12

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同被引文献33

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引证文献4

二级引证文献15

应用科学学报
2011年 第4期

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