译码转发协同通信网络自适应中继选择算法  

Adaptive relay selection algorithm in decode-and-forward cooperative communication networks

作　　者：康虹[1,2] 冯文江[1] 贾年龙[1] 孟器宇[3] 

机构地区：[1]重庆大学通信工程学院 [2]重庆电子工程职业学院 [3]中国人民解放军66489部队

出　　处：《重庆大学学报（自然科学版）》2013年第2期109-114,共6页Journal of Chongqing University

基　　金：重庆市自然科学基金重点资助项目(CSTC2009BA2064)

摘　　要：为了优化译码转发协同通信网络的性能,提出一种自适应中继选择算法(ARS),并对系统中断概率和平均协同中继数进行分析。该算法在源节点到目的节点的直接传输失败时,目的节点对译码集中的中继节点按信道质量进行降序排列,依次选择序列中的中继节点参与协同,直到目的节点的瞬时接收信噪比不低于预置信噪比门限。仿真结果表明,ARS算法能够获得最优系统中断性能,有效减少平均协同中继数,从而提高带宽效率,降低系统开销。An adaptive relay selection algorithm（ARS） is proposed to optimize the performance of decode- and-forward cooperative communication networks, both system outage probability and average numbers of cooperative relays are analyzed. When the direct transmission between source and destination is fail, according to the channel quality, the destination orders relay nodes in the decode set, and the ordered relays are included in cooperation in turn until the instantaneous received SNR at destination is not smaller than performance, decrease the average numbers of cooperative relays efficiently, to incrense bandwidth efficiency and reduce system overhead.

关 键 词：协同通信 译码转发 中继选择 中断概率 

分 类 号：TN925[电子电信—通信与信息系统]