一种改进的小波域阈值滤波方法

A Modified Filtering Method by Threshold Filter in Wavelet Domain

针对使用传统小渡域阈值滤波方法对非平稳的低信嗓比信号进行处理时,其去噪效果不是很好的问题,提出了一种小波域N次阈值滤波方法,并对小波域二次阈值滤波方法进行了实验仿真,仿真结果表明该方法对低信嗓比信号去噪效果更好。

When using conventional de-noising method by threshold filter in wavelet domain to process unsteady low SNR signal in additive Gaussian white noise, its de-noising effect is not always good. A N-th threshold filter in wavelet domain is proposed in this paper, and quadratic threshold filter method is simulated . The simulation result shows that the new method is effective to low SNR signal.