伺机频谱接入协同分集的中断概率

Outage Probability of Cooperative Diversity with Opportunistic Spectrum Access

固定频谱分配政策导致频谱使用率低,为克服这一缺点,人们提出使用认知无线电技术实现伺机频谱接入,从而有效利用频谱空穴。分析了一个解码转发协作网络真实的中断概率,并且推导了独立等同、独立非等同两种瑞利信道下的中断概率,最后进行了仿真和分析。

Today＇s wireless networks are governed by a fixed spectrum assignment policy which results in low efficiency in spectrum utilization. Cognitive radio（CR） has been proposed to use opportunistic spectrum access so as to use spectrum holes efficiently. This paper presents an exact outage performance analysis for the rates of a decode- and- forward cooperative network,derives a closed form solution for independent and identically distributed channels as well as independent and non- identically distributed channels at arbitrary signal- to- noise ratio （SNR）,finally makes simulation and analysis.