多跳协作分集系统的中断性能  

Outage performance of multi-hop cooperative diversity system

作　　者：唐菁敏[1] 曹金石[1] 龙华[1] 张春平[1] 

机构地区：[1]昆明理工大学信息工程与自动化学院,昆明650500

出　　处：《计算机应用》2013年第8期2121-2123,2131,共4页journal of Computer Applications

基　　金：国家自然科学基金资助项目(60872157);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项目(2009ZC016X;2011FB035);云南省人才培养项目(KKSY201203029)

摘　　要：推导了在高信噪比条件下解码转发(DF)多跳分集网络的中断概率近似表达式和分集度;针对解码转发多跳分集系统不能提供空间满分集这一缺点,提出改进的选择性解码转发(SDF)算法,当中继节点不能正确解码信息时,将由源节点重新发送信息;相应地推导了在高信噪比条件下SDF多跳分集系统中断概率表达式及分集度。通过理论分析及仿真结果表明,SDF能有效改善协作分集系统的传输性能,且能获得空间满分集增益。An approximate outage probability formulation and diversity order were derived for multi-hop diversity system employing Decode-and-Forward（DF） relaying in high Signal-to-Noise Ratio（SNR）.And a modified multi-hop Selective Decode-and-Forward（SDF） protocol was proposed to overcome the limitation of space full diversity system unemploying DF relaying,the source node resended the information when the relay could not decode information correctly.An approximate outage probability formulation and diversity order were deduced for SDF protocol in high SNR.The theoretical analysis and simulation results show that the SDF protocol can improve transmission performance and achieve the full space diversity contrasted with DF protocol.

关 键 词：协作分集 解码转发 选择性解码转发 中断概率 分集度 

分 类 号：TN929.53[电子电信—通信与信息系统]