基于SNR法的自适应随机共振系统的研究  

Design of Adaptive Stochastic Resonance Technology in Large Frequency Range

作　　者：吴君棋[1] 赵文礼[1] 刘鹏[1] 

机构地区：[1]杭州电子科技大学机械工程学院,浙江杭州310018

出　　处：《杭州电子科技大学学报（自然科学版）》2008年第6期131-134,共4页Journal of Hangzhou Dianzi University：Natural Sciences

基　　金：国家自然科学基金资助项目(60572052)

摘　　要：该文应用随机共振对微弱信号检测的原理,在研究非线性双稳系统及双稳系统随机共振频谱的基础上,利用傅立叶变换频移特性及设计了非线性大频率随机共振系统及其控制系统电路。并通过模拟工程实际,提出了简单的自适应算法,验证了其对于微弱信号检测的有效性。This paper introduces the basic principle of stochastic resonance （SR） in weak signal detection from a heavy noise background. Based on this principle, adaptive detection technology and frequency shift characteristic of Fourier transform have been studied. We research how to control the nonlinear bistable system to obtain SR phe- nomenon, and then, design the nonlinear system circuit and control system circuit. Considering the real status of the project, a simple adaptive algorithm is stated. The experiment results testify this algorithm is effective.

关 键 词：大频率随机共振 自适应 信噪比 白噪声 频谱 

分 类 号：TN401[电子电信—微电子学与固体电子学]