速率自适应的软网络编码方案  

Rate-adaptive soft network coding scheme

作　　者：李妮[1] 吴玉成[1] 祁美娟[1] 

机构地区：[1]重庆大学通信工程学院,重庆400034

出　　处：《电子技术应用》2011年第3期106-109,113,共5页Application of Electronic Technique

基　　金：国家自然科学基金(60872038);中国博士后基金(20090450787);重庆市教委科技项目(KJ08A09);国家"211工程"人才培养计划(S-09102)

摘　　要：针对双向无线中继信道链路的时变性,提出了速率自适应的软网络编码方案。构造了基于软信息的网络编码中继协作方案,并通过对网络容量的估计,实现了自适应速率网络编码。仿真结果表明:速率自适应的软网络编码方案大大降低了中继节点的计算复杂度和功耗,所能达到的信息速率优于固定速率下的网络编码策略,能够适合不同的传输质量需求,在保持较低的误比特性能的同时,尽可能提高信道容量,从而使性能得到优化。A rate adaptive soft network coding scheme is proposed for the two-way relay channel （TWRC） with time variability. On the one hand, a relay cooperative communication scheme based on soft information is established; on the other hand, rate adaptive network coding is achieved by estimating the network capacity. Simulation results show that the scheme proposed in this paper reduces the complexity and power consumption in the relay node and achieves a much higher information rate compared with the fixed rate network coding scheme. It can meet different transmission quality requirements, maximize channel capacity and optimize the system performance while maintain low BER performance.

关 键 词：双向无线中继信道 网络编码 软信息 速率自适应 

分 类 号：TN911.23[电子电信—通信与信息系统]