中文说明：采用了小波去噪的思想，matlab小波分析程序，基于chebyshev的水声信号分析，关于非线性离散系统辨识，对于初学者具有参考意义，计算目标和海洋回波的功率谱密度。
English Description：
Using Wavelet denoising, MATLAB Wavelet analysis, analysis of underwater acoustic signals based on Chebyshev, nonlinear discrete-time system identification for beginners is useful, calculating and sea echo Doppler power spectral density.