Optimal MAC based cooperative spectrum sensing in cognitive radio networks

查看全文 作　　者：CHEN [1]Zhong;ZHANG [1]XianDa;YANG [2]LanJuan

机构地区：[1]State Key Laboratory of Intelligent Technology and Systems,Tsinghua National Laboratory for Information Science and Technology,Department of Automation,Tsinghua University,Beijing 100084,China;[2]Institute of Command Automation,PLA University of Science and Technology,Nanjing 210007,China

出　　处：《Science China(Information Sciences)》索引2012年第55卷第6期,共9页

基　　金：supported by National Natural Science Foundation of China(Grant No.60975041) 摘　　要：This paper considers a cognitive radio (CR) system in non-ideal fading wireless channels and pro-poses cooperative spectrum sensing schemes based on coherent multiple access channels (MAC),serving as an alternative way to improve the cooperative spectrum sensing performance and provide space diversity for spec-trum sensing.Sufficient statistics are transmitted using a common channel from the secondary users (SUs) to a fusion center (FC) where the global decision is obtained.The optimal scaling factors of the proposed schemes are obtained by maximizing the detection probability under a target false alarm probability and a transmit power constraint.Because the proposed optimal MAC scheme has high computational complexity,a sub-optimal solu-tion based on maximization of the deflection coefficient (DC) is also proposed.Simulation results show that the proposed algorithms can significantly improve the spectrum sensing performance and approach the detection baseline. 关键词：高频谱 MAC 无线电网络合作感知优化检测性能认知无线电

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Optimal MAC based cooperative spectrum sensing in cognitive radio networks

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