EMD-based 60-Hz noise filtering of the ECG

Amit J Nimunkar; Willis J Tompkins

doi:10.1109/IEMBS.2007.4352688

EMD-based 60-Hz noise filtering of the ECG

Annu Int Conf IEEE Eng Med Biol Soc. 2007:2007:1904-7. doi: 10.1109/IEMBS.2007.4352688.

Authors

Amit J Nimunkar¹, Willis J Tompkins

Affiliation

¹ Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA.

PMID: 18002354
DOI: 10.1109/IEMBS.2007.4352688

Abstract

This study used empirical mode decomposition (EMD) for filtering power line noise in electrocardiogram signals. When the signal-to-noise (SNR) is low, the power line noise is separated out as the first intrinsic mode function (IMF), but when the SNR is high, a part of the signal along with the noise is decomposed as the first IMF. To overcome this problem, we add a pseudo noise at a frequency higher than the highest frequency of the signal to filter out just the power line noise in the first IMF. The results are compared with traditional IIR-based bandstop filtering. This technique is also implemented for filtering power line noise during enhancement of stress ECG signals.

MeSH terms

Algorithms
Artifacts
Computers
Data Interpretation, Statistical
Electrocardiography / instrumentation*
Electrocardiography / methods
Equipment Design
Fourier Analysis
Humans
Models, Statistical
Models, Theoretical
Normal Distribution
Signal Processing, Computer-Assisted / instrumentation*
Software