对信号进行小波变换，抑制系数小波滤波，采用了硬阈值滤波方法-right signal wavelet transform, wavelet filter coefficients inhibit use of the hard threshold filtering method

对信号进行小波分解，用硬阈值方法去除噪声，进而提高精度-right signal wavelet decomposition, with a hard threshold to remove noise, and to improve accuracy