基于莱斯信道的认知网络合作频谱感知

摘要

推导认知无线网络下单认知用户与多认知用户合作频谱感知的莱斯信道模型,并分别进行仿真.结果表明,莱斯信道下单认知用户的频谱感知效果远不及理想环境下的检测效果,但随着认知用户的增加,合作频谱感知的效果明显改善,在增加到一定程度后,甚至优于理想环境下的单用户的检测效果.%This paper derives the model of local spectrum sensing and cooperative spectrum sensing over Rician channel, and makes simulation. The results suggest that the sensing performance of local spectrum sensing over Rician channel is not so far as the performance over the AWGN, then with the increase of secondary users, the performance of cooperative spectrum sensing may improve sensing performance significantly, and will be better then the circumstance over the AWGN when the number of the secondary users is big enough.