合作分集授权系统性能研究  

Performance Research on Cooperative Diversity of Licensed System

作　　者：唐菁敏[1] 龙华[1] 刘增力[1] 邵玉斌[1] 

机构地区：[1]昆明理工大学信息工程与自动化学院,云南昆明650500

出　　处：《昆明理工大学学报（自然科学版）》2012年第3期31-34,共4页Journal of Kunming University of Science and Technology(Natural Science)

基　　金：云南省社会发展科技计划项目(2009CA027);云南省科技厅应用基础研究计划(2009ZC016X;2011FB035)

摘　　要：认知无线电接入现有授权网络中会产生干扰,基于此提出了解码转发(DF)中继协作的方法,加入中继协助传输授权信号,从而改善认知用户的检测性能.由于DF性能很大程度上依赖于源-中继端信道传输特性,提出改进的选择解码转发(SDF)中继协作的方法.理论分析与仿真结果表明,中继的协作能提供合作分集,减少对授权网络的干扰.而SDF性能比DF的更为可靠.Spectrum access of cognitive radio must interfere with licensed network. Thins paper presents Decode -and- forward（DF） protocol, which can improve detection performance of cognitive user by the cooperative transmission with relay. As DF protocol relies heavily on channel propagation characteristics of source - to - re- lay, a modified selective decode - and - forward （SDF） protocol is proposed. Theoretical analysis and simulation results show that the cooperation by relay can gain cooperative diversity and decrease interference to licensed net- work. Meanwhile, the SDF protocol can provide higher reliability than DF protocol.

关 键 词：认知无线电 授权网络 解码转发 选择解码转发 中断概率 

分 类 号：TN929.53[电子电信—通信与信息系统]