After the electromagnetic signal transmitted by the radar signal data source is collected, it is transformed from time domain to frequency domain, that is, discrete Fourier transform and adaptive amplitude beam forming, so that the signal frequency is compensated, and the waveforms of the reconstructed signal are analyzed and compared. Through the characterization of the redefined model, the visible light, infrared, radar spectrum and other band data do not lose their own information, so as to reduce the large loss of time-varying time function and selective integration in detection performance. The complete time-frequency representation of the reconstructed signal and the real signal shows that the reconstructed signal presents different time-frequency characteristics and has better energy resolution.