Cooperative Spectrum Sensing Techniques in Cognitive Radio  

作　　者：Wang Haijun, Su Xin, Wang Jing (Wireless and Mobile Communication Technology R&D Center, Tsinghua University, Beijing 100084 , P . R . China ) 

出　　处：《ZTE Communications》2009年第2期11-15,共5页中兴通讯技术（英文版）

基　　金：supported by the National High Technology Research and Development Program of China ("863" Program) under Grant No. 2007AA01Z289;the National Natural Science Foundation of China under Grant No. 2007CB310608.

摘　　要：Cognitive radio has become an effective theory to solve the inefficiency of the spectrum usage. One of the main requirements of cognitive radio systems is the ability to reliably detect the spectrum hole. Previous works on the problem of detection for cognitive radio have suggested the necessity of user cooperation to enable the detection at the low signal-to-noise ratios experienced in practical situations. This paper introduces energy sensing and the cooperative sensing techniques: AND model, OR model, counting model, double threshold model, likelihood ratio model, linear cooperation model and DWCS model. It is proved that significant cooperative gain can be achieved by the proposed models in reducing interference and improving spectrum usage.Cognitive radio has become an effective theory to solve the inefficiency of the spectrum usage. One of the main requirements of cognitive radio systems is the ability to reliably detect the spectrum hole. Previous works on the problem of detection for cognitive radio have suggested the necessity of user cooperation to enable the detection at the low signal-to-noise ratios experienced in practical situations. This paper introduces energy sensing and the cooperative sensing techniques: AND model, OR model, counting model, double threshold model, likelihood ratio model, linear cooperation model and DWCS model. It is proved that significant cooperative gain can be achieved by the proposed models in reducing interference and improving spectrum usage.

关 键 词：Cooperative Spectrum Sensing Techniques in Cognitive Radio 

分 类 号：TN92[电子电信—通信与信息系统]