面向区域的认知无线电系统的频谱感知模型

Region oriented spectrum sensing model for cognitive radio system

建立了面向区域的频谱感知模型(RSSM),根据路径损耗和衰落裕度理论推导出了RSSM感知区域的大小。基于RSSM,在单用户频谱感知中分析了阈值设定方法以及次用户位置对频谱感知性能的影响;在协作频谱感知中,利用D-S理论分析了硬决策协作频谱感知中次用户分散性对感知性能的影响。最后通过仿真实验证明了本文模型的正确性。

A Region-oriented Spectrum Sensing Model（RSSM）was proposed.First,the size of the sensing area of RSSM was deduced using path loss and fading margin theory.Then,in single-user spectrum sensing framework,the method of threshold setting and the impact of secondary user＇s location on the performance of spectrum sensing were analyzed.Furthermore,in hard decision-making cooperative spectrum sensing,the effect of the secondary user＇s dispersion on the performance of spectrum sensing was studied.Simulation results not only demonstrate the effectiveness and rationality of the proposed model,but also confirm the correctness of location information on the analysis of spectrum sensing performance.