随机共振应用于大频率周期性弱信号检测

研究了利用随机共振检测强噪声背景下的大频率周期性弱信号.利用时序步进采样将大频率待测周期性弱信号的频率降低,再利用非线性双稳态系统的随机共振强烈压制伴随大频率信号的噪声,同时信号由于其稳定的周期振荡行为从噪声背景下凸现出来.研究结果表明该技术在检测强噪声背景下的大频率周期性弱信号方面具有明显的优势,且能够大幅度地提高利用随机共振检测弱信号的频率.

Detection of high frequency periodic weak signal based on stochastic resonance

Detection of high frequency periodic weak signal under heavy noise background was studied by using stochastic resonance.The frequency of the weak signal was lowered by using time step sampling and the noise going with large frequency weak signal was restrained intensively by the stochastic resonance of nonlinear bistable system,meanwhile,the periodic signal was stood out from the heavy noise background.The results show that this method has clear potential for detecting high frequency periodic weak signal from heavy noise background with stochastic resonance and time step sampling,and the frequency of weak signal detected by stochastic resonance can be improved greatly.