电子学报Issue(9)：1672-1679,8.DOI:10.3969/j.issn.0372-2112.2013.09.002
低信噪比条件下基于随机共振的感知方法与性能分析
A Spectrum Sensing Method and Performance Analysis Based on Stochastic Resonance Under Low SNR
摘要
Abstract
According to the spectrum sensing problem under low signal-noise ratio (SNR) and dynamic noise in cognitive radio(CR)networks ,this paper introduced nonlinear stochastic resonance(SR)of physics into spectrum sensing ,and proposed an en-ergy detection(ED)based on generalized stochastic resonance(GSR) .For the proposed algorithm ,SR noise was added to make non-linear system ,signal and noise matched ,which modifies the probability distribution of the detection statistics ,and confirms the exis-tence of the signal effectively .This paper drive the probability density unction (PDF)of matched noise ,and get some significant con-clusions about the performance ,effect of noise uncertainty and sensing time of the proposed algorithm .The simulation results vali-date the theory ,and show that the proposed algorithm can improve the performance of existing energy detection at least 3dB under low SNR .The proposed algorithm also has less sensing time ,low complexity and can effectively overcome the influence of the noise uncertainty .关键词
频谱感知/随机共振/能量检测/低信噪比/噪声不确定度Key words
spectrum sensing/stochastic resonance/energy detection/low SNR/noise uncertainty分类
信息技术与安全科学引用本文复制引用
高锐,李赞,吴利平,李群伟,齐佩汉..低信噪比条件下基于随机共振的感知方法与性能分析[J].电子学报,2013,(9):1672-1679,8.基金项目
国家自然科学基金（No ．61072070）；教育部博士学科点基金（No ．20110203110011）；教育部基础科研业务费（No ．72124338）；陕西省自然基金重点项目（No ．2012JZ8002）；ISN国家重点实验室自主课题（No ．ISN1101002）；高等学校学科创新引智计划 （）
