认知无线电中基于协同中继的网络性能优化  

Performance Improvement with Cooperative Relaying in Cognitive Radio

作　　者：吴立涛[1] 惠晓威[1] 

机构地区：[1]辽宁工程技术大学电子与信息工程学院,辽宁葫芦岛125105

出　　处：《计算机测量与控制》2012年第12期3361-3364,共4页Computer Measurement &Control

摘　　要：针对认知无线电和协同通信这两种技术的结合,在认知无线电中设计联合解码转发JDF方案,在保证主要网络链接的服务质量(QoS)的前提下,无论在峰值干扰约束还是均值干扰约束的情况下,都能得到最优解,使认知无线电用户的传输速率最大化;通过仿真分析可以得出:在认知无线电网络中,使用优化后的发射功率和恰当的协同中继进行传输能提高系统性能,优于直接传输和单独的协同传输。Cooperative communication and cognitive radio have become hot topics in recent research of communication networks. So Joint Decode--and--Forward （JDF） was proposed for cognitive radio. It maximizes cognitive users＇ power and transmission rate under the peak or average interference constraints, while the interference experienced by the licensed users is limited. The simulation validates the effectiveness of proposed algorithm by comparing it with the direct transmission and the cooperative transmission alone.

关 键 词：认知无线电 功率优化 协同通信 中继选择 

分 类 号：TN912[电子电信—通信与信息系统]