A COLLABORATIVE SPECTRUM SENSING SCHEME USING FUZZY COMPREHENSIVE EVALUATION IN COGNITIVE RADIO  

作　　者：Yang Wendong Ye Yuhuang Cai Yueming Xu Youyun 

机构地区：[1]Institute of Communications Engineering, PLA University of Science and Technology, Nanjing 210007, China [2]Institute of Microwave Communication, Fuzhou University, Fuzhou 350002, China

出　　处：《Journal of Electronics(China)》2009年第3期326-331,共6页电子科学学刊（英文版）

基　　金：Supported by the National Natural Science Foundation of China (No.60672079);the Natural Science Foundation of Jiangsu Province (No.BK2006701 and No. BK2007002)

摘　　要：Cognitive Radio(CR) is a promising technology to solve the challenging spectrum scarcity problem.However, to implement CR, spectrum sensing is the groundwork and the precondition.In this paper, a collaborative spectrum sensing scheme using fuzzy comprehensive evaluation is proposed.The final sensing decision of the proposed scheme is based on the combination of distributed sensing results of different Secondary Users(SUs).To improve the reliability of the sensing decision, the combination procedure takes into account the credibility of each SU, which is evaluated using fuzzy comprehensive evaluation.The effect of the presence of malicious SUs and malfunctioning SUs on the performance of the proposed scheme is also investigated.The efficiency of the scheme is validated through analysis and simulation.Cognitive Radio （CR） is a promising technology to solve the challenging spectrum scarcity problem. However, to implement CR, spectrum sensing is the groundwork and the precondition. In this paper, a collaborative spectrum sensing scheme using fuzzy comprehensive evaluation is proposed. The final sensing decision of the proposed scheme is based on the combination of distributed sensing results of different Secondary Users （SUs）. To improve the reliability of the sensing decision, the combination procedure takes into account the credibility of each SU, which is evaluated using fuzzy comprehensive evaluation. The effect of the presence of malicious SUs and malfunctioning SUs on the performance of the proposed scheme is also investigated. The efficiency of the scheme is validated through analysis and simulation.

关 键 词：Cognitive Radio （CR） Collaborative spectrum sensing Fuzzy comprehensive evaluation 

分 类 号：TN92[电子电信—通信与信息系统] O159[电子电信—信息与通信工程]