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.
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)
关键词
定向天线
协同通信
中断概率
功率分配
directional antenna
cooperative communication
outage probability
power allocation
