Stochastic resonance induced by bounded noise and periodic signal in an asymmetric bistable system

Stochastic resonance (SR) induced by the bounded noise in an asymmetric bistable system is investigated. Based on stochastic simulation, the signal power amplification SPA$SPA$ is derived for the case of the additive modulated signal. The simulation results indicate that: (1) the SR phenomenon is weakened by the asymmetry of the system; (2) increasing the frequency ω$\omega$ restricts the SR of the system; (3) there is an optimum value of amplitude A$A$ matching the strongest SR phenomenon.