基于多中继多天线认知无线传感器网络系统的中继选择和中断概率的分析

摘要

多中继多天线解码转发(DF)认知网络系统模型由一个多天线授权用户源节点,一个多天线认知用户源节点,多个多天线中继节点,一个多天线授权用户目的节点以及一个多天线认知用户目的节点组成.首先,使用最大最小中继选择方案选出最优中继.然后,在最优中继协助通信的情况下,给出了授权用户和认知用户的中断概率所对应的表达式.最后,在授权用户和认知用户具有不同天线数目的情况下,以及在有无中继选择的情况下,给出了相应的中断概率的数值仿真.%Multi-relay multi-antenna decode-and-forward(DF)cognitive networks consist of a multiple antenna source node, a plurality of multiple antenna relay node,a multiple antenna destination node and a multi-antenna authorized user destination node and a multi-antenna cognitive user destination node. Specifically,firstly,the optimal relay was selected by using the max-min relay selection scheme. Then,in the case of optimal relay assisted communication,the corresponding expression of the inter-rupt probability of authorized user and cognitive user is given. Finally,the corresponding numerical analysis is given in the case of primary user and secondary user with different antenna number,and in the case of whether there is a relay selection.