中文摘要：

针对多中继协作通信带来的中断性能差与高能耗问题,在N个源节点的混合译码放大转发网络中,提出了一种基于多源-多中继协作通信的中继选择与功率分配方案.该方案将空闲时的N-1个源节点当作＂中继节点＂,＂中继节点＂根据信道统计特性值自适应地降序排列,选取M个＂中继节点＂组成最优中继集合.当中断概率一定时,根据信噪比门限判断被选择M个＂中继节点＂的协作方式,构造系统总功率Lagrange函数,通过Karush-KuhnTucker极值条件求得系统各节点的最小功率.数值分析结果表明,在传输速率为0.5～0.8 bit·s-1·Hz-1范围内,相比于放大转发方式下的多源-多中继协作通信的功率分配方案,该功率分配方案的总功率节省了9～22 d Bm,极大地减小了系统资源的消耗.

英文摘要：

In hybrid-decode-amplify-and-forward （HDAF） network with N source nodes, a joint relay selection and power allocation strategy for multi-source multi-relay cooperative communication is presented.The strategy takes N-1 idle source nodes as ＆quot;relay nodes＆quot; and minimizes outage probability and the total power as the goal, in which the channel statistical characteristic values are rearranged according to adaptively descending, and M ＆quot;relay nodes＆quot; are selected to form optimal relays set.Under certain outage probability, the cooperative approach of M selected relays is given by setting the signal-to-noise ratio threshold, the Lagrange function of total power is constructed, and the extreme value method of Karush-Kuhn-Tucker is used to obtain the minimization each nodes transmission power.It is shown by simulation that, compared with amplify-and-forward power allocation strategy for multi-source multi-relay cooperative communication, the total power of the proposed HDAF power allocation strategy can reduce about 9~22 dBm in the range of 0.5~0.8 bit＆#183;s-1＆#183;Hz-1 transmission rate, that will minimize the energy consumption.