基于随机共振的微弱信号检测研究

摘要

Weak signal is a small signal,which is drowned in the noise,and generally with low SNR. Detection of weak signals is very important in engineering application,especially in the fields of physics,electronics and biomedicine. According to the theory of stochastic resonance,noise under certain conditions is conducive to detection of weak signals. The principle of stochastic resonance,stochastic resonance phenomenon in bistable systems and applied research status of stochastic resonance are studied in this paper.%微弱信号是淹没在噪声中的小信号，且一般其信噪比比较低。微弱信号的检测在物理、电子和生物医学方面都具有重要的意义。依据随机共振理论，噪声在一定的条件下有利于微弱信号的检测。研究了随机共振的原理、双稳态系统中的随机共振现象及随机共振的应用研究现状。