基于经验模式分解的自适应去噪算法
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
基于加性高斯白噪声在经验模式分解算法(Empirical Mode Decomposition,EMD)下的统计特性,提出了一种基于EMD的去噪算法。通过数值仿真,比较了提出的算法与小波域阈值去噪的性能。仿真结果表明,该算法与小波域阈值去噪的效果相似,而不用选择小波基,是一种自适应的去噪算法。
Based on the statistic features of uniformly distributed white noise using the Empirical Mode Decomposition(EMD),an adaptive de-noising algorithm based on EMD is proposed.The numerical experiments are made between the Wavelet Threshold De-noise(WTD) and the adaptive method based on EMD.The results show that the adaptive method is similar to WTD,and it is no need to select a mother wavelet,it is adaptive to kinds of signals.
引文
[1]Huang N E,Shen Zheng.The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis[C]//Proc R Soc London A,1998,454:903-995.
    [2]Huang N E,Shen Zheng,Long Steven R.A new view of nonliear water waves:the Hilbert spectrum[J].Annual Review of Fluid Me-chanics,1999:417-457.
    [3]龙思胜,张铁宝,龙峰.希尔伯特-黄变换中拟合过冲和端点飞翼的原因及解决办法[J].地震学报,2005,27[5]:561-568.
    [4]盖强,张海勇.几种局域波分解方法的比较研究[J].系统工程与电子技术,2002[2]:56-59.
    [5]邓拥军,王伟.EMD方法及Hilbert变换中的边界问题的处理[J].科学通报,2001,46[3]:257-263.
    [6]张郁山,梁建文.应用自回归模型处理EMD方法中的边界问题[J].自然科学进展,2003,13[10]:1054-1059.
    [7]罗奇峰,石春香.Hilbert-Huang变换理论及其计算中的问题[J].同济大学学报,2003,31[6]:637-640.
    [8]黄大吉,赵进平.希尔伯特-黄变换的端点延拓[J].海洋学报,2003,25[3]:1-11.
    [9]Wu Zhao-huan,Huang N E.A study of the characteristics of white noise using the empirical mode decomposition method[C]//4th Int Workshop on Biosignal Interpretation,2002,Como[I]:123-126.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心