A sampling limit for the empirical mode decomposition

被引：0
|
作者：
Stevenson, N [1 ]
Mesbah, M [1 ]
Boashash, B [1 ]
机构：
[1] Queensland Univ Technol, CRC Integrated Engn Asset Management, Brisbane, Qld 4001, Australia
来源：
ISSPA 2005: The 8th International Symposium on Signal Processing and its Applications, Vols 1 and 2, Proceedings | 2005年
关键词：
D O I：
暂无
中图分类号：
TP18 [人工智能理论];
学科分类号：
081104 ; 0812 ; 0835 ; 1405 ;
摘要：
The aim of this paper is to investigate the effect of sampling on the empirical mode decomposition (EMD). To this end, an experiment utilising linear frequency modulated (LFM) signals was used to simulate different sampling rates. This experiment showed that as the frequency content of the signal (f(c)) approached the sampling frequency (f(S)) the EMD performed poorly due to poor amplitude resolution. This led to a definition of a sampling limit that was 5 times the Nyqvist rate (f(s)/10) to improve the performance of the EMD Comparative simulation with this sampling limit was conducted on a simulated and a real world signal. The results exhibited significant improvement in intrinsic mode function (IMF) orthogonality, the distribution of IMF energy and IMF coherence.
引用
收藏
页码：647 / 650
页数：4
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