小波去噪，将信号映射到小波域，根据噪声和噪声的小波系数在不同尺度上具有不同的性质和机理，对含噪信号的小波系数进行处理。-Wavelet denoising, the signal is mapped to the wavelet domain, according to the noise and noise wavelet coefficients in different scales have different properties and mechanisms, the noise s