协作通信中网络拓扑结构的最佳中继定位

Optimum Relay Location in Cooperative Communication Based on Network Topology

与多中继协作通信相比,单中继协作通信对于无线传感器网络更具实用价值.单中继协作通信网络拓扑结构的研究对提高协作通信系统的性能有着重大的意义.本文分析了几种简单的网络拓扑结构,利用误比特率性能,在等功率条件下分别确定了各拓扑结构的最佳中继的位置.并对这几种拓扑结构进行了对比分析,分析结果表明,直线型的网络拓扑结构的系统性能最好,等腰三角形网络拓扑结构的系统性能优于等边三角形网络拓扑结构的系统性能,为协作通信中的最佳中继定位提供一定的理论依据.

Compared with the multi-relay cooperative communication,single-relay cooperative communication has more practical value for wireless sensor networks.This paper analyzes several simple network topologies.Under the condition of equal power allocating,the optimum relay locations are respectively determined by using symbol error rate（SER） formula.And these types of topologies are compared,the analysis results show that,Linear network topology has the best system performance,the system performance of isosceles triangle topology is better than that of equilateral triangle topology which has given the theoretical basis of the optimal relay location in Cooperative communication.