Effect of sample frequency on the weak signal detection performance of stochastic resonance

摘要

The principle and mathematical model of stochastic resonance(SR)are presented to detect the weak periodic signal from strong background noise.The nature that signals with noise through a bistable system forms SR phenomenon is the optimum matching of system parameters,signal sample frequency,signal amplitude,and noise strength.It reveals the law that the changing of signal sample frequency will affect the SR performance with the other parameters invariable.The weak signal will be detected from SR system only by selecting the appropriate sample frequency.