一种能量自适应的降噪阈值函数  

A Energy self-adaptive threshold function on denoise

作　　者：周永明[1] 赖晓铮[2] 赖声礼[2] 

机构地区：[1]韶关大学 [2]华南理工大学,广州510640

出　　处：《微计算机信息》2008年第7期288-289,209,共3页Control & Automation

基　　金：广东省科技攻关项目(2003C40406)

摘　　要：为探讨非平稳信号降噪的有效算法,基于Donoho阈值降噪思路,提出了一种能量自适应的降噪阈值函数.仿真实验结果显示,其效果优于Donoho软硬阈值降噪和付里叶频谱分析降噪的效果.探讨了四种常用的小波降噪的效果,同时也研究了能量自适应函数中的常数M对降噪效果的影响.结果说明,不同的小波降噪,存在一M值,降噪效果最好.To study the efficient algorithm of deniosing on non-steady signal,based on route of Donoho s algorithm of threshod deniose,this paper presents a new energy self-adaptive threshold function on deniosing.Simulation results show that the effect of deniosing with this new function is better than that of both traditional Donoho s and Fourier s deniosing method.This paper also probes into the affects of both four wavelets in common use and the constant M in the function on threshold deniosing.The results explain...

关 键 词：信号处理 阈值降噪 能量自适应 阈值函数 

分 类 号：TN911[电子电信—通信与信息系统]