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《Journal of Anhui University(Natural Sciences Edition)》 2010-01
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Detecting high frequency weak signal using frequency shifting stochastic resonance

SUN Jing-jing(School of Physics and Material Science,Anhui University,Hefei 230039,China)  
The phenomenon of stochastic resonance in a nonlinear bistable system stimulated by a high frequency periodic signal was investigated,based on the frequency shifting characteristic of Fourier transform.The simulation results showed that after shifting the input frequency to a small one,the output power spectrum peaks of the bistable system were strongly enhanced at this frequency.The ability of detecting weak signal overwhelmed in strong noise within a rather broad frequency range was improved in this way.
【CateGory Index】: O324
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【Citations】
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