基于小波包滑动阈值的信号去噪

Signal Denoising Based On Slip Threshold Figure of Wavelet Packets

传统信号去噪方法常采用门限法对噪声信号的小波或小波包变换做阈值处理以达到去噪的目的。本文介绍了一种利用小波包滑动阈值去噪的新方法,通过对信号的小波包分解系数的滑动阈值量化,得到重构的去噪信号。计算机仿真结果表明,滑动阈值法具有很好的实用价值。

In traditional denoising methods for signals, we usually use the method of threshold to achieve dcnoising by the threshold disposing of wavelet packet transform. This paper introduces a new method which is used in wavelet packet denoisng with the slip threshold. Through quantifying the slip threshold figure of the wavelet packet decomposing coefficient of noises, the dcnoising signal is reconstructed. The result of the computer simulation indicates that the method of the slip threshold figure has practical value.