Study on high frequency weak signal detection method based on stochastic resonance

Common nonlinear stochastic resonance system(a=1, b=1)is subject to the restriction of small frequency parameter and weak signal amplitude in weak signal detection, which brings difficulty to actual applications. In order to solve this problem, a stochastic resonance detection method suitable for high frequency weak signal detection is presented. The method can make the input high frequency weak periodic signal meet the stochastic resonance amplitude requirement through adjusting the coefficient k to change the nonlinear parameter b; and also realize the stochastic resonance of high frequency weak signal through adjusting the coefficient R to change the nonlinear parameters a, b to improve the resonance frequency by R times. With theoretical analysis and numerical simulation, the adjustment methods and adjustment steps of coefficients K and R are studied; and a realizable high frequency weak signal detection method is established.