基于HDAF系统的最优中继集合优化选择策略

针对混合译码放大转发协作通信最优中继集合选择困难的问题,提出了基于信道统计特性顺序排列的中继选择算法.首先,在各节点等功率分配下分析了各中继信道统计特性的参数运算,得到了使系统中断概率最小的中继集合,很大程度降低了运算复杂度.仿真表明,在相同情况下,与传统中继选择算法相比,这种算法平均中断概率更低.其次,对参与通信各节点的功率重新分配,系统性能得到了进一步提升.

Optimal Relay Set Selection Strategy Based on HDAF System

To solve the problem of selecting the optimal relay set for hybrid decode-amplify-and-forward cooperative communication, a relay selection algorithm based on the statistical channel information was proposed. First, the parameter calculation of the statistical channel information of each relay was analysed under the equal power allocation. Then the optimal relay set with minimum outage probability was obtained. The simulation results show that the average outage probability of this algorithm is lower than that of the other traditional relay selection algorithmunder the same conditions. In addition, the performance of the system is further improved by the redistribution of the power of the working nodes in cooperative communication.