Stochastic resonance with tuning system parameters: the application of bistable systems in signal processing

A thorough evaluation of stochastic resonance with tuning system parameters in bistable systems is presented as a nonlinear signal processor. It is sh own that the output signal-to-noise ratio obtained by adjusting systems par ameters can exceed that by tuning noise intensity, especially when the inpu t noise intensity is already beyond the resonance region. It is demonstrate d that the theory and the method presented here can markedly improve the ou tput signal-to-noise ratio, and minimize phase lag as well as the distortio n of the system output signal with multi-frequency. (C) 2001 Published by E lsevier Science Ltd.