摘要
本文针对正弦波用经验模式分解(EMD)进行分析时存在的问题,从实验上结出了采样率和信号间相互作用对EMD的影响。为了提高对极值点采样的准确性,本文提出了利用抛物线插值来拟合极值点的方法,使结果得到明显的改善。本文还对信号间相互作用的问题进行了讨论。
The aim of this paper is to investigate the problem of empirical mode decomposition （EMD） on analyzing sine wave. To this end,experiments have been employed to analyze the effect of sampling and signal interaction on the EMD.For the accuracy of sampling extrema, parabolic interpolation Ires been used for the extrema fitting which shows obvious improved results. The signal interaction of a combination of two sine waves is also discussed.
出处
《数学理论与应用》
2009年第4期14-19,共6页
Mathematical Theory and Applications
关键词
EMD
正弦波
采样率
信号间相互作用
Empirical mode decomposition （EMD） Sine wave Sampling rate Signal interaction
