改进的Morlet小波在信号特征提取中的应用

Application of a modified morlet wavelet in feature extraction

小波分析提取数字调制信号调制特征是一种比较有效的分析方法。本文通过分析Morlet小波中各参数对提取调制特征性能的影响 ,提出一种改进的Morlet小波变换 (MMWT) ,并将其用于信号调制特征提取。计算机仿真表明 ,基于MMWT的特征提取性能优于基于Morlet小波变换的方法 。

The wavelet transform can effectively be used to extract the features of digital modulation communication signals. Based on the analysis of the feature attraction performance with respect to Morlet wavelet parameters, a modified Morlet wavelet (MMWT) algorithm is proposed and is applied to analyze the feature of digital modulation communication signals. The simulations confirm that the proposed algorithm is of excellent ability of anti-jamming, and has better performances than that of the Morlet wavelet.