Abstract：
:We adopt the Ensemble Empirical Mode Decomposition (EEMD) method, with an appropriate thresholding on the Intrinsic Mode Functions (IMFs), to denoise the magnetocardiography (MCG) signal. To this end, we discuss the two associated problems that relate to: (i) the amplitude of noise added to the observed signal in the EEMD method with a view to prevent mode mixing and (ii) the effect of direct thresholding that causes discontinuities in the reconstructed denoised signal. We then denoise the MCG signals, having various signal-to-noise ratios, by using this method and compare the results with those obtained by the standard wavelet based denoising method. We also address the problem of eliminating the high frequency baseline drift such as the sudden and discontinuous changes in the baseline of the experimentally measured MCG signal using the EEMD based method. We show that the EEMD method used for denoising and the elimination of baseline drift is superior in performance to other standard methods such as wavelet based techniques and Independent Component Analysis (ICA).
journal_name
Med Eng Physjournal_title
Medical engineering & physicsauthors
Mariyappa N,Sengottuvel S,Parasakthi C,Gireesan K,Janawadkar MP,Radhakrishnan TS,Sundar CSdoi
10.1016/j.medengphy.2014.06.023subject
Has Abstractpub_date
2014-10-01 00:00:00pages
1266-76issue
10eissn
1350-4533issn
1873-4030pii
S1350-4533(14)00185-4journal_volume
36pub_type
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