功率分配对前向放大协作分集技术的影响  

Influence of power distribution on amplify-and-forward cooperative diversity protocol

作　　者：冯文江[1] 薛绒[1] 程中武[1] 

机构地区：[1]重庆大学通信工程学院,重庆400030

出　　处：《重庆大学学报（自然科学版）》2008年第5期524-527,共4页Journal of Chongqing University

基　　金：国家自然科学基金资助项目(60672097);重庆市自然科学基金资助项目(CSTC;2007BB2162)

摘　　要：针对认知无线电对主用户检测时间的严格要求,将协作分集技术中的前向放大方法用于主用户检测的过程。某节点检测到主用户时,其他节点可以将此信息相互中继,从而减少检测时间。当节点同时要传输自己的信息时,需要进行功率分配。仿真结果表明,在中继节点无论有无功率分配,协作分集技术都可以增加检测概率。A cooperative diversity protocol was used to detect the presence of licensed users and analyzed the performance. According to this protocol, when one of the users had detected a licensed user, other users could transmit the information to each other, which can decrease significantly the detecting time. Once users had their own information to transmit, they must distribute power. The simulation results show that this protocol can increase the detection probability whether or not there is power distribution at the transmitting node.

关 键 词：认知无线电 前向放大协作方法 主用户检测 功率分配 

分 类 号：TN929.52[电子电信—通信与信息系统]