为了得到感知网络传输性能的理论关系式,针对重叠共享(US)方式下的多跳解码转发(DF)协作分集感知网络进行了性能分析,推导出在高信噪比条件下感知网络的中断概率近似表达式及其分集度.理论分析与仿真结果表明,在高信噪比条件下,虽然多跳DF协作分集感知系统不能获得空间分集增益,但随着跳数的增加,感知系统中断性能有所改善.
By analyzing the multi-hop cooperative cognitive diversity network in underlay sharing(US) mode,an approximate outage probability formulation and diversity order is derived for decode-and-forward(DF) protocol in high signal-to-noise ratio to get theory equations of cognitive transport performance.A good outage performance of cognitive system with the increase of hop number in high signal-to-noise ratio is obtained.Simulation shows that multi-hop DF cooperative cognitive diversity system achieves no more space diversity gain.