小波变换的时频分析及其在实际中的应用

Wavelet Transform for Time-frequency Analysis and Its Application

由于小波变换自身的特性,它非常适合对非平稳和时变信号进行分析及处理。本文介绍了小波变换的时频分析,具体将小波变换应用于几个非平稳及时变信号的处理,并将小波变换和其他信号时频分析方法做了比较,得出了小波变换的优势和适用特点,最后给出了小波变换应用于信号去噪的例子。

Wavelet transform is quite suitable for non-stationary and time-varying signals processing.This paper introduces wavelet transform for time-frequency analysis and some of its application in non-stationary and time-varying signals processing.Then this paper compares wavelet transform with other ways of signal＇s time-frequency analysis and puts forward the advantages and features of wavelet transform.At last,examples of denoising using wavelet transform is showed.