非线性单稳态系统中基于内禀振荡的随机共振

通过考察具有内禀振荡的单稳态非线性系统的随机振荡行为,研究了内禀振荡对噪声背景中微弱信号检测性能的影响.结果表明,输出信噪比和系统信噪比增益都表现出随机共振行为;该随机共振现象依赖于系统的选频特性,而系统的选频特性源于内禀振荡.该单稳态非线性系统表现出的这种源于内禀振荡的随机共振,可能为微弱信号检测系统的设计提供新思路.

Stochastic Resonance in Nonlinear Monostable System Based on Intrinsic Oscillations

By simulating the stochastic oscillation behaviors of a monostable nonlinear system with intrinsic oscillations,the effect of intrinsic oscillations on detecting the weak signal in background noise is studied.The results show that the output SNR and SNR gain display stochastic resonance behavior,and this stochastic resonance phenomenon depends on the frequency-selecting characteristic of the system, which stem from the intrinsic oscillations. The performance of stochastic resonance in the monostable nonlinear system, which due to the existence of intrinsic oscillations, may provide new ideas for the design of weak signal detection system.