说明：  为了优化协作通信系统的性能 ,提出了一种基于信道容量增益的中继节点选取策略 ,并在此基础上提出了源节点和中继节点最优功率分配算法. 协作通信 中继节点选取 功率分配 凸优化
(A joint optimization st rategy for relay selection and power allocation is proposed to optimize the performance of cooperative communication system.cooperative communication relay selection power allocation convex optimization)