The application of stochastic resonance technique in detecting submarine
Shi-chuan Wang · Shengxue jishu · 2014
When navigation of submarine in. For a low speed submarine, propeller running and assisting machine working produce linear spectrums between 0Hz and 100Hz. If the acoustic source is weak, the signal and noise ratio decomes very low, the traditional demon spectrum analysis method for analyzing signal can not find the linear spectrums. This restricts the capacity to find submarine. Stochastic resonance theory is a nonlinear way of detecting target. Based on stochastic resonance theory and using scan frequency technique for stochastic resonance, the power of linear spectrum can be increased and the signal and noise ratio advanced. According to the theory, the data of submarine were processed to incease the signal and noise ratio by 8 dB, and the practical detecting distance was double that of before.