信号相位匹配噪声估计的小波去噪方法

Wavelet Denoising of Phase Matching the Signal Noise Estimation

多数小波阈值去噪方法需要根据噪声方差来计算相应的阈值,所以噪声方差的估计将直接影响阈值去噪的效果。提出了一种新的相位匹配的噪声方差估计方法,利用该方法实时地逼近当前噪声,建立新的噪声的阈值求取方法。通过实验证明该方法能够大幅度提高信噪比,可以取得非常好的去噪效果。

Most of the wavelet threshold denoising method needs to calculate the corresponding threshold. The estima-tion of noise variance will directly affect the effect of threshold denoising method. This paper presented a new phase matching of the noise variance estimation method, using the method in real-time estimate the current noise. A new method of noise threshold was set up. The experiments show that the method can greatly improve the signal to noise ratio and can be made a very good denoising effect.