| 多址接入中继系统中LDPC乘积码的优化设计 |
| |
| 引用本文： | 李宗艳,吴湛击,杨帆,王文博.多址接入中继系统中LDPC乘积码的优化设计[J].系统工程与电子技术,2012,34(10):2142-2146. |
| |
| 作者姓名： | 李宗艳 吴湛击 杨帆 王文博 |
| |
| 作者单位： | 1. 北京邮电大学泛网无线通信教育部重点实验室, 北京 100876;;
2. 中国矿业大学信息与电气工程学院, 江苏 徐州 221116 |
| |
| 基金项目： | 国家重大科技专项(2009ZX03003-011-03,2010ZX03003-003-01);国家自然科学基金(61171101)资助课题 |
| |
| 摘 要： | 针对两个用户、一个中继节点、一个基站的多址接入中继系统提出了一种基于低密度奇偶校验（low density parity check，LDPC）乘积编码的网络编码方案。为了进一步提升系统性能，方案中采用了一种基于外信息转移（extrinsic information transfer， EXIT）图的LDPC乘积码度分布优化算法。该算法主要是对中继节点的LDPC乘积编码进行优化设计，同时可预测LDPC乘积码的迭代译码性能。性能分析与仿真结果表明：优化的网络编码方案进一步改善了传输网络的误码率性能，利用EXIT曲线图实现了迭代译码性能的近似估计。
|
| 关 键 词： | 多址接入中继信道 外信息转移图 迭代译码 收敛 |
Optimized LDPC product codes design for multiple access relay systems |
| |
| LI Zong-yan
,
WU Zhan-ji
,
YANG Fan
,
WANG Wen-bo.Optimized LDPC product codes design for multiple access relay systems[J].System Engineering and Electronics,2012,34(10):2142-2146. |
| |
| Authors: | LI Zong-yan WU Zhan-ji YANG Fan WANG Wen-bo |
| |
| Institution: | 1. Key Laboratory of Universal Wireless Communications, Ministry of Education, Beijing University of ;
Posts and Telecommunications, Beijing 100876, China;;
2. School of Information and Electrical Engineering, China University of Mining & Technology, Xuzhou 221116, China |
| |
| Abstract: | An optimized low density parity check (LDPC) product network coding scheme is proposed for a multiple-access relay (MARC) system with two users, one relay station (RS) and one base station (BS). In this scheme, based on the extrinsic information transfer (EXIT) charts, an optimization algorithm of LDPC product codes is also put forward in order to further improve the performance of the system. Performance analysis and numerical results show that the optimized scheme significantly outperforms the original LDPC-product networking coding scheme and the conventional XOR-based network coding scheme. |
| |
| Keywords: | |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《系统工程与电子技术》浏览原始摘要信息 |
| 点击此处可从《系统工程与电子技术》下载免费的PDF全文 |
