The echo expression of through-the wall surveillance(TWS) detector based on continuous wave is derived,and a simple harmonic vibration model based on the movement characteristics of human body is adopted.The comparison of experimental signal to simulated signal indicates that the echo of TWS detector is fitted well with the model.According to the characteristic of echo,stochastic resonance method is applied to detect the target.Concretely,nonlinear bistable system and twice sampling stochastic resonance met...
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