基于小波变换模极大值的信号去噪方法

Denoising Method based on Wavelet Transform Modulus Maxima

提出一种简单的小波变换模极大值去噪算法，并通过仿真实验进行验证，与小波变换软阈值去噪、小波变换硬阈值去噪和小波变换强制去噪进行比较，比较过程采用信噪比为2dB的加噪bump信号，均使用db3小波基进行4层分解，结果证明该方法比各种阈值去噪和强制去噪的效果都要好。

After deep research, a relatively simple denoising method based on wavelet transform modulus maxima is presented. And test is conducted for examining its effectiveness, comparing with denoising method based on soft threshold function , hard threshold function and forced denoising, with denoised bump signal of 2dB, wavelet base of db3 being used in all of the methods mentioned above, and decomposition of four levels proceeded. Result proves that the method proposed is the best one