Generalized Sum-Product Algorithm for Joint Channel Decoding and Physical-Layer Network Coding in Two-Way Relay Systems
Generalized Sum-Product Algorithm for Joint Channel Decoding and Physical-Layer Network Coding in Two-Way Relay Systems
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DOI：
10.1109/glocom.2010.5683819
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发表时间：
2010-12
期刊：
影响因子：
--
通讯作者：
D. Wübben;Yidong Lang
中科院分区：
文献类型：
--
作者：
D. Wübben;Yidong Lang
本文研究了一种采用低密度奇偶校验（LDPC）码纠错的物理层网络编码双向中继系统，其中两个信源A和B希望通过中继R进行信息交换。在这样的系统中的关键过程是在中继器处基于两个源的叠加信道编码字来计算网络编码发送字。针对这种联合信道解码和网络编码任务，开发了广义和积算法（SPA）。仿真结果表明，这种新的迭代译码方法优于其他最近提出的方案。
In this paper a physical-layer network coded two-way relay system applying Low-Density Parity-Check (LDPC) codes for error correction is considered, where two sources A and B desire to exchange information with each other by the help of a relay R. The critical process in such a system is the calculation of the network-coded transmit word at the relay on basis of the superimposed channel-coded words of the two sources. For this joint channel-decoding and network-encoding task a generalized Sum-Product Algorithm (SPA) is developed. This novel iterative decoding approach outperforms other recently proposed schemes as demonstrated by simulation results.