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多址访问中继信道下多边LDPC码校验点联合编码设计 被引量：1

PJCMET-LDPC codes design in multi-access relay channels
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摘要 为逼近解码前传半双工多址访问中继信道容量,提出一种多边低密度奇偶校验(low-density parity-check,LDPC)码校验点联合编码(parity jointly coded multi-edge type LDPC codes,PJCMET-LDPC)结构及其度分布优化方法。该结构视中继校验比特为PJCMET-LDPC码的一部分,目的端利用从信源和中继接收的消息联合译码获得所有信源信息。为了分析该编码算法的渐进性能,推导了基于消息错误概率的多边外信息转移图噪声门限分析方法。在此基础上,提出PJCMET-LDPC码度分布优化方法。实验仿真表明,与SCC-LDPC码和NCC-LDPC码相比,PJCMET-LDPC码可以获得更大的编码增益。 In order to approach the theoretical limit of decode-and-forward strategy for half-duplex multiple access relay channel,a parity jointly coded multi-edge type LDPC（PJCMET-LDPC） coding structure and its corresponding optimization scheme are proposed.The new structure makes the extra parity bits generated by the relay as a part of the overall code.Using messages from all source nodes and the relay node,the destination can decode the information of all sources.To analyze the performance of PJCMET-LDPC codes,a multilateral extrinsic information transfer（EXIT） chart based on message-error rate is devised as an extension of standard EXIT.Based on this EXIT chart,a design methodology is developed for PJCMET-LDPC codes.Experment results show that PJCMET-LDPC codes always outperform both SCC-LDPC codes and NCC-LDPC codes.
作者 陈紫强 欧阳缮 李民政 肖海林
机构地区 西安电子科技大学电子工程学院 桂林电子科技大学信息与通信学院
出处 《系统工程与电子技术》 EI CSCD 北大核心 2012年第5期1018-1023,共6页 Systems Engineering and Electronics
基金 国家自然科学基金(60972084 61162007 61102115) 国家重点基础研究发展计划(973计划)(2008CB317109) 广西自然科学基金重点项目(2011GXNSFD018028) 广西科学基金(桂科自0991241) 广西无线宽带通信与信号处理重点实验室2011年度主任基金(11104 11106) 广西研究生教育创新计划(2011105950810M18)资助课题
关键词 低密度奇偶校验码 多信源中继 解码前传 密度进化 low-density parity-check（LDPC） code multi-source relaying decode-and-forward density evolution
分类号 TN911.22 [电子电信—通信与信息系统]
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参考文献17

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二级参考文献15

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共引文献4

同被引文献13

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系统工程与电子技术
2012年 第5期

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