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    Research on Detection of Domestic Frequency Shift Signal Based on Stochastic Resonance

    KONG De-long;HU Wan-xin;SI De-guang;LI Ming;South-Central University for Nationalities;  
    Aiming at the problems of low detection accuracy and poor anti-interference ability of existing detection methods for domestic 2 FSK signal of track circuit in complex line environment, based on the theory of stochastic resonance, this paper completes the detection of domestic 2 FSK signal by establishing a bistable demodulation model. Firstly, the characteristics of the domestic 2 FSK signal are analyzed and studied; secondly, the bistable signal detection system is established based on the theory of stochastic resonance; finally, the simulation analysis and the detection results are given by using MATLAB platform. The simulation results show that the output signal-to-noise ratio of the signal can be effectively improved by using the stochastic resonance bistable signal detection system, which has good detection accuracy and strong anti-interference ability.
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