认知无线电能量检测与循环谱检测算法研究  

Energy detection and cyclostationary detection for cognitive radio systems

作　　者：申达[1] 甘小莺[1] 许苗[1] 钱良[1] 

机构地区：[1]上海交通大学电子工程系无线通信技术研究所,上海200240

出　　处：《信息技术》2010年第5期23-25,29,共4页Information Technology

基　　金：科技部国际合作资助项目(2008DFA11950);重大专项(2009ZX03002-003;2009ZX03002-005;2008ZX03003-004)

摘　　要：频谱检测是认知无线电的关键技术之一。通过对认知无线电频谱检测技术中的能量检测和循环谱检测技术进行研究,并对能量检测性能、观测数据长度和接收信噪比之间的定量关系进行分析;同时,还介绍了循环谱检测算法的原理,并仿真了不同信噪比下能量检测和循环谱检测算法的性能。仿真结果表明,循环谱检测算法具有比能量检测算法更高的检测灵敏度。Spectrum sensing is one of the key technologies for cognitive radio systems.Energy detection and cyclostationary detection are analyzed in this paper.The relationship among energy detection performance,the data length and SNR are analyzed,meanwhile,the theory of the cyclostationary detection algorithm is introduced.The performances of energy detection algorithm and cyclostationary detection algorithm under the different SNR are given.According to the simulations,the cyclostationary detection performs much better than energy detection.

关 键 词：认知无线电 频谱检测 能量检测 循环谱检测 

分 类 号：TN92[电子电信—通信与信息系统]