网络编码的LDPC编码协作

doi:10.3969/j.issn.0255-8297.2014.03.005

应用科学学报 ›› 2014, Vol. 32 ›› Issue (3): 251-256.doi: 10.3969/j.issn.0255-8297.2014.03.005

网络编码的LDPC编码协作

张顺外，仰枫帆，唐蕾

南京航空航天大学电子信息工程学院，南京210016

收稿日期:2012-06-13 修回日期:2013-01-03 出版日期:2014-05-31 发布日期:2013-01-03
作者简介:张顺外，博士，研究方向：信道编码及协作通信，E-mail：zhshwa@163.com；仰枫帆，教授，博导，研究方向：数字通信，E-mail：yffee@nuaa.edu.cn
基金资助:
国家航空科学基金(No.20105552031)资助

Network Coding Based LDPC-Coded Cooperation

ZHANG Shun-wai, YANG Feng-fan, TANG Lei

College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics,
Nanjing 210016, China

Received:2012-06-13 Revised:2013-01-03 Online:2014-05-31 Published:2013-01-03

摘要/Abstract

摘要： 提出了一种基于网络编码的LDPC 编码协作方案，该方案采用非正规二进制LDPC 系统码. 中继通过网络编码协作两用户传输数据，提高了系统平均吞吐量. 针对协作中继只发送校验比特策略，研究了中断概率性能. 目的节点译码器采用基于联合Tanner 图的联合迭代译码算法对来自两用户和协作中继的三路信号进行译码.
仿真结果表明：与传统非协作系统相比，基于网络编码的LDPC 编码协作方案大大降低了系统中断概率；在高信噪比条件下，所提出的方案在误比特性能上具有明显的性能增益.

关键词: 编码协作, 网络编码, 非正规二进制LDPC系统码, 中断概率, 联合Tanner图

Abstract: This paper proposes a cooperation scheme for network coding based on irregular binary systematic LDPC codes. The relay cooperates with two users via network coding simultaneously to improve average throughput. Outage probability of the proposed scheme is analyzed for the case that the relay just forwards parity-check bits. To efficiently decode three signals from the two users and the relay, a joint iterative decoding algorithm is used at the destination based on the joint Tanner graph. Simulation results show that the proposed network coding based LDPC-coded cooperation scheme significantly lowers outage probability compared with noncooperation schemes. In case of high SNR, the scheme can achieve obvious bit-error-ratio (BER) performance gain.

Key words: coded cooperation, network coding, irregular binary systematic LDPC codes, outage probability, joint Tanner graph

中图分类号:

TN911.22

张顺外，仰枫帆，唐蕾. 网络编码的LDPC编码协作[J]. 应用科学学报, 2014, 32(3): 251-256.

ZHANG Shun-wai, YANG Feng-fan, TANG Lei. Network Coding Based LDPC-Coded Cooperation[J]. Journal of Applied Sciences, 2014, 32(3): 251-256.

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网络编码的LDPC编码协作

Network Coding Based LDPC-Coded Cooperation

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