小波降噪阈值选取的研究

Selection of A Wavelet Noise-reduction Threshold

小波分析用于信号降噪的过程中，核心的算法就是在小波系数上作用阈值，因为阈值的选取直接影响降噪的质量．笔者就阈值的选取做了一些理论分析并在MATLAB环境下进行仿真研究，得出应用小波降噪过程中阈值选取的一些实际结论．

In many computer control systems, the monitored signals are unavoidably contaminated by noise. Many signal process techniques can be used to increase the signal to noise ratio. In this paper, a wavelet noise reduction approach and different threshold selecting methods are studied. A series of simulating results by using MATLAB are given.