动态多中继协同节点选择算法  

Dynamic Multi-Nodes Relay Selection Algorithm

作　　者：覃琴[1,2] 曾志民[2] 张天魁[2] 张从青[2] 

机构地区：[1]三峡大学计算机与信息学院,湖北宜昌443002 [2]北京邮电大学信息与通信工程学院,北京海淀区100876

出　　处：《电子科技大学学报》2011年第4期505-508,共4页Journal of University of Electronic Science and Technology of China

基　　金：国家自然科学基金(60772110)

摘　　要：为优化协同通信系统的性能,提出了一种动态多中继译码转发(DF)协同节点选择算法MRS-DF。该算法联合考虑节点的剩余能量信息和信道状态信息对网络生存时间进行优化,以获得更长的网络生存时间和更大的信道容量。仿真验证表明,动态分配中继功率时,选择4个中继性能已经达到最优。MRS-DF算法的网络生存时间和信道容量远大于仅考虑节点信道状态信息的中继选择算法。在10次仿真中,该算法网络生存时间平均延长201.1%,信道容量平均提高164.55%。In order to optimize the performance of cooperative communication systems,a dynamic multi-relay decoded forwarding（DF） nodes selection algorithm MRS-DF is proposed.The algorithm jointly considers the residual energy information of nodes and channel state information（CSI） to optimize the network lifetime,to obtain longer network lifetime and greater channel capacity.Simulation results show that,for dynamic relay power distribution,the best performance can be reached by selecting 4 relays.The network lifetime and system channel capacity of MRS-DF algorithm are much larger than those only considering the channel state information nodes selection algorithm.In 10 simulations,the proposed algorithm can extend the network lifetime average of 201.1% and increase the channel capacity average of 164.55%.

关 键 词：算法 信道容量 网络生存时间 协作分集 多中继选择 优化 剩余能量 

分 类 号：TN92[电子电信—通信与信息系统]