基于双正交小波变换的宫缩信号消噪

Contraction Signal's De-Noising Based on the Biorthogonal Wavelet Transform

小波分析的信号消噪方法是现代信号处理中的重要组成部分,小波基的不同选取将直接影响消噪的效果.本文在全局阈值的标准下,基于不同噪声水平,讨论了小波基的正交性和线性相位性对消噪结果的影响,提出了选取小波基的一般方法,最后利用双正交小波基在软阈值标准下实现了对宫缩信号的消噪处理,并取得了较好的效果.

The signal de-noising method based on wavelet transform is an important part of modern signal processing;the selection of different wavelet basis will cause different result s of de-noising.This paper on the global threshold criterion,based on different noise,discuss the orthogonal and the linearity of the wavelet basis have the affect to signal de-noising,posed a method of the selection of wavelet basis,then use the biorthogonal wavelet basis and soft-thresholding implement a de-noising of contraction signal.