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...
出处
《微计算机信息》
北大核心
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)
关键词
信号处理
阈值降噪
能量自适应
阈值函数
signal processing
threshold deniosing
energy self-adaptation
threshold function
