【作者】 路姗； 李颖；

【Author】 LU Shan LI Ying (The State Key Lab of ISN,Xidian University,Xi’an,710071,China)

【机构】 西安电子科技大学ISN国家重点实验室；

【摘要】 针对两个源节点通过一个中继节点交互信息的双向中继信道,提出了一种联合Turbo译码-网络编码的中继转发策略,可有效改善转发质量和转发效率。所提转发策略分两个时隙完成,在第一个时隙,源节点S₁和S₂同时向中继节点发送数据,在第二时隙,中继将收到的两个源节点的叠加信号进行联合Turbo译码-网络编码,并将两个源节点的估计信息重新编码后广播给源节点S₁和S₂。两个源节点可根据收到的中继转发数据和本地数据,恢复出对方发送的数据。对于双向中继信道源节点采用Turbo码的情况,本文的方法比基于最小均方误差的物理层网络编码方案约有0.6dB的增益。更多还原

【Abstract】 A relaying scheme combined turbo decoding with network coding is proposed to improve the throughput of the two-way relay channels.This scheme is completed through two phases.In the first phase, both S₁ and S₂ send information to the relay node simultaneously.In the second phase,according to the superimposed received signal,the relay node fast implements a joint turbo decoding-network coding to obtain directly the modul-2 of the information of two sources.Then,it reencodes the modul-2 results and broadcasts the coded signal to the two sources.Via employing the local information and the received signal, each source can recover the information transmitted by the other.The simulations show that,the proposed scheme has about 0.6dB coding gains over the MMSE-based physical network coding scheme when turbo code is used by the source node.更多还原