利用子波变换检测信号波形

An application of wavelet transform in signal waveform detection

利用于波变换的多分辨性质，基于信号和随机噪声在子波变换域中不同的模极大值系数特征，设计并实现了一种实用的波形检测器．对不同信号的仿真处理结果表明该方法既能提取一定的信噪比改善增益，又能保持对待检信号的良好分辨，适合于对一类非平稳信号进行时变滤波处理．

Based on the multiresolution property of wavelet transform,a pracatical waveform detector is presented by using the difference of WT modulus maxima evolution behaviors between signal and random noise in multiscale space. The simulation results show that this method is effective in processing a class of nonstational signals with a useful SNR gain,with a good resolution on irregulraity information of the signal to be processed.