改进阈值函数下的小波阈值降噪

小波阈值去噪是工程中常采用的一种信号处理方法,阈值函数的选取对噪声抑制的效果具有决定作用。首先介绍了小波阈值算法的基本原理;然后针对传统软阈值与硬阈值函数的缺点对其进行了适当改进,并阐述了新阈值函数的重要性质;最后通过仿真对比了不同阈值函数下的信号提取效果。结果表明,相比传统的阈值函数,新阈值函数能更有效地促进信号与噪声的分离。

Wavelet Threshold De-noising in Improved Threshold Function

Wavelet threshold de-noising is a kind of signal processing method often used in engineering.The selection of threshold function has a decisive effect on the effect of noise suppression.Firstly,this paper introduces the basic principle of wavelet threshold algorithm.Secondly,it improves the traditional soft threshold and hard threshold function,and expounds the important properties of the new threshold function.Finally,it compares the signal extraction effect under different threshold functions by simulation.The results show that compared with the traditional threshold function,the new threshold function can effectively promote the separation of signal and noise.