定向多节点DF协同通信系统中断概率及功率分配研究  

Outage probability and power allocation of directional multi-relays DF cooperative communication system

作　　者：杨丽薇[1] 杨源[2] 王徐华[3] 李明阳[3] 

机构地区：[1]空军工程大学信息与导航学院,陕西西安710077 [2]空军工程大学空管领航学院,陕西西安710051 [3]空军工程大学综合电子信息系统与电子对抗技术研究中心,陕西西安710051

出　　处：《电子设计工程》2013年第9期82-85,88,共5页Electronic Design Engineering

基　　金：国家自然科学基金青年项目(61202339);陕西省自然科学基础研究计划项目(2012JQ8034)

摘　　要：对基于定向天线的多节点DF协同通信系统进行研究,应用协作域的方法推导其中断概率,同时证明了机会中继条件下中断概率最优,并通过数值仿真得出最优功率分配因子范围。仿真结果表明多中继参与的情况下应根据实际场景选择其数量,在同等数量中继节点且功率受限的条件下,机会中继方案能获得更优的中断概率及更简单的功率分配方法。因此在多中继节点DF定向协同通信系统中,可以采用机会中继方案以实现最优的系统性能。Multi-relays DF cooperative communication system based on directional antenna is researched, outage probability is derived by applying cooperative domain and it is proved that opportunistic relay can gain the optimal Outage probability. The optimal power allocation factor range is also obtained by numerical simulation. Simulation results show that the number of relays which involved in the communication should be selected according the specific circumstance.On the condition that the number of relays is in the same amount and the total power is constrained, The scheme of opportunistic relay can get better outage probability and simplify the power allocation. Therefore, in the multi-relays DF directional cooperative communication system, the scheme with opportunistic relay could be adopted to achieve optimal system performance.

关 键 词：定向天线 协同通信 中断概率 功率分配 

分 类 号：TN914[电子电信—通信与信息系统]