TY - GEN
T1 - A sampling limit for the empirical mode decomposition
AU - Stevenson, N.
AU - Mesbah, M.
AU - Boashash, B.
PY - 2005
Y1 - 2005
N2 - 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 (fs) 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 (fs /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.
AB - 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 (fs) 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 (fs /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.
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U2 - 10.1109/ISSPA.2005.1581021
DO - 10.1109/ISSPA.2005.1581021
M3 - Conference contribution
AN - SCOPUS:33847108462
SN - 0780392434
SN - 9780780392434
T3 - Proceedings - 8th International Symposium on Signal Processing and its Applications, ISSPA 2005
SP - 647
EP - 650
BT - Proceedings - 8th International Symposium on Signal Processing and its Applications, ISSPA 2005
T2 - 8th International Symposium on Signal Processing and its Applications, ISSPA 2005
Y2 - 28 August 2005 through 31 August 2005
ER -