电子科技大学学报2025，Vol.54Issue(3)：377-383,7.DOI:10.12178/1001-0548.2024075
基于广义似然比的非圆信号频谱感知方法
Spectrum sensing for non-circular signals based on generalized likelihood ratio
摘要
Abstract
Traditional spectrum sensing schemes that are devised under the assumption of circular signals suffers from performance degradation in the presence of non-circular signals.To overcome such drawback,a novel spectrum sensing method for non-circular signals is proposed.Within the framework of generalized likelihood ratio,the test statistic is constructed by employing the nonzero characteristic of complementary covariance of non-circular signals.The proposed method is able to utilize the complete second-order statistical properties of non-circular signals,and does not require any prior information of the primary signals or noise power.Additionally,the statistical moments of proposed method are derived under null hypothesis,and the cumulative distribution function of proposed method is also obtained based on edgeworth expansion.On this basis,the analytic expression of sensing threshold is further established.Experimental results illustrate that the proposed method outperforms other state-of-the-art detectors in various scenarios.关键词
频谱感知/非圆信号/广义似然比/埃奇沃斯展开Key words
spectrum sensing/non-circular signal/generalized likelihood ratio/edgeworth expansion分类
电子信息工程引用本文复制引用
赖华东,罗朋,徐今强,刘洺辛..基于广义似然比的非圆信号频谱感知方法[J].电子科技大学学报,2025,54(3):377-383,7.基金项目
国家自然科学基金面上项目(62171143) （62171143）
广东海洋大学科研启动经费资助项目(060302112316) （060302112316）
