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	基于滑动窗译码的不规则原模图LDPC卷积码的构造(英文); Construction of irregular protograph-based LDPC convolutional codes with windowed decoding
	刘林涛 ; 吕毅博
	2014-02-15
关键词	低密度奇偶校验码(LDPC) 卷积码 原模图 滑动窗译码 置信传播译码 门限 加性高斯白噪声(AWGN)信道 low-density parity-check(LDPC) convolutional codes protograph windowed decoding belief propagation thresholds additive white Gaussian noise(AWGN) channel
英文摘要	时延是现代通信系统的一个重要指标。滑动窗译码能够在保证性能的基础上降低时延。基于滑动窗译码提出了一种不规则原模图低密度奇偶校验(lOW dEnSITy PArITy CHECk,ldPC)卷积码的构造方法。通过对基于Ar4JA(ACCuMulATE-rEPEAT-by-4-JAggEd-ACCuMulATE)的ldPC卷积码在AWgn(AddITIVE WHITE gAuSSIAn nOISE)信道下的P-EXIT性能分析发现,利用这种构造方式能够设计出多码率并且在bP译码和滑动窗译码方式下都能逼近容量限的ldPC卷积码。计算机仿真证明了基于Ar4JA的ldPC卷积码性能优于规则的ldPC卷积码,而且在滑动窗译码方式下在降低至少56.7%时延的同时表现出了很好的性能。结合提出的不规则原模图ldPC卷积码的构造方法和滑动窗译码得到了一种能够实现译码时延与码字性能良好折中的码字构造有效方式。; Latency is an important indicator for modern communication systems.The windowed decoding scheme exhibits good performance with reduced latency.In this paper,a construction scheme for irregular protograph-based low-density parity-check( LDPC) convolutional codes with windowed decoding is proposed.The protograph-EXIT( P-EXIT) analysis for the accumulate-repeat-by-4-jagged-accumulate( AR4JA)-based LDPC convolutional codes over the additive white Gaussian noise( AWGN) channel shows that this flexible construction technique can give rise to the LDPC convolutional codes with different code rates and thresholds close to capacity,for both BP decoding and windowed decoding.The computer simulations identify the AR4JA-based LDPC convolutional codes outperform the regular LDPC convolutional codes and the AR4JAbased LDPC convolutional codes exhibit good performance with at least 56.7% reduced latency.Combining the proposed construction scheme for irregular protograph-based LDPC convolutional codes and the windowed decoding scheme can provide an efficient way to trade-off the decoding latency and the code performance.; TheNationalNaturalScienceFoundationofChina(61271241)~~
语种	zh_CN
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/123142]
专题	信息技术－已发表论文
推荐引用方式 GB/T 7714	刘林涛,吕毅博. 基于滑动窗译码的不规则原模图LDPC卷积码的构造(英文), Construction of irregular protograph-based LDPC convolutional codes with windowed decoding[J],2014.
APA	刘林涛,&吕毅博.(2014).基于滑动窗译码的不规则原模图LDPC卷积码的构造(英文)..
MLA	刘林涛,et al."基于滑动窗译码的不规则原模图LDPC卷积码的构造(英文)".(2014).

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