认知无线电系统中部分用户合作频谱感知算法  

Partial Cooperative Spectrum Sensing Algorithm of the Cognitive Radio Networks

作　　者：薛峰[1] 屈代明[1] 朱光喜[1] 白云[1] 

机构地区：[1]华中科技大学电子与信息工程系武汉光电国家实验室,湖北武汉430074

出　　处：《小型微型计算机系统》2010年第7期1270-1274,共5页Journal of Chinese Computer Systems

基　　金：能利用非连续频谱空洞的动态频谱接入关键技术研究项目(60702039)资助;国家"八六三"高技术研究发展计划研究项目(2009AA011803)资助

摘　　要：合作频谱感知提高认知无线电系统频谱感知的可靠性.传统算法采用全部认知用户参与感知,如果系统中认知用户数量较多,将导致数据传输性能受影响.在此基础上提出一种采用部分用户合作频谱感知方法.它在系统认知用户数量一定,满足给定系统探测概率前提下,只需选用部分认知电台参与频谱感知,并使系统吞吐量最大.仿真证明在200个认知用户的系统中,如果选择50个用户参与频谱感知,其系统吞吐量可提高约12.5%.Cooperative spectrum sensing increases the reliability of the spectrum sensing of the cognitive radio system.In traditional algorithm,all cognitive users participate in sensing.If the number of cognitive users in system is larger,the data transmission efficiency would be deteriorated.On this basis,the method of partial cooperative spectrum sensing is provided in this paper.On the premise of a certain amount of cognitive radio and meeting the detection probability of given system,it can use partial of cognitive radio to participate in spectrum sensing and maximize the system throughput.Simulation shows that if selecting 50 users participates in spectrum sensing among 200 cognitive radios,the system normalized throughput would increase 12.5%.

关 键 词：认知无线电 频谱感知 硬判决 部分用户感知 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]