基于双门限能量检测性能分析  

Performance analysis based on double threshold energy detection

作　　者：陈佳佳 孙干超[1] CHEN Jia-jia;SUN Gan-cao(Yancheng Institute of Technology,JiangSu Yancheng 224051,China)

机构地区：[1]盐城工学院,江苏盐城224051

出　　处：《科技视界》2018年第25期129-130,共2页Science & Technology Vision

基　　金：盐城工学院教育教改专项项目(No.JGZX2017B006)

摘　　要：普通的单门限能量检测,一旦遇到突发噪声和其他干扰的因素,就非常有可能导致误检测。本文运用了一种新型的双门限协作能量检测算法。经过多次仿真,结果均表明这种方法可以提升频谱检测的可能性,与此同时能够减小漏检率。当信噪比较低时,认知用户数N=5时,双门限性能最高要比单门限高出22%;认知用户数N=10时,双门限性能最高要比单门限高出17%。在实际的环境中,低信噪比的恶劣环境相对较多,因此双门限具有非常高的优势,应用空间相对广阔。Ordinary single-threshold energy detection, when encountering sudden noise and other interference factors, is very likely to lead to false detection. This paper applies a new dual -threshold cooperative energy detection algorithm. After several simulations,the results show that this method can improve the possibility of speetrum detection, and at the same time can reduce the rate of missed detection. When the signal-to-noise ratio is low, when the number of cognitive users is N =5,the double-threshold performanee is up to 22% higher than the single-threshold; when the number of cognitive users is N=10, the double-threshold performance is higher than the single-threshold by 17 %. In the actual environment,the harsh environment with low SNR is relatively large, so the double threshold has a very high advantage and the application space is relatively wide.

关 键 词：认知无线电 单门限 双门限 能量检测 

分 类 号：TN925[电子电信—通信与信息系统]