关键词: 随机共振, 输出幅度增益, 二值噪声, 过阻尼线性系统

Abstract: The phenomenon of stochastic resonance of an over-damped second-order linear system subject to dichotomic noise (DN) is investigated. Based on linear-system theory and the correlation deletion method, the explicit expression of the output amplitude gain (OAG) of the system is obtained. It is shown that the OAG is a non-monotonic function of the strength, the correlation time of the DN, the system damping coefficient, as well as the frequency of the driving signal. In addition, by choosing appropriate parameters of the noise and the system, the OAG of the noisy system can be larger than that of the noise-free system.

Key words: stochastic resonance, output amplitude gain, dichotomic noise, over-damped linear system