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Methods Inf Med 1994; 33(01): 15-19
DOI: 10.1055/s-0038-1634973
Original Article
Schattauer GmbH

Interference Removal with an Improved Incremental Estimation Filter

J. A. Kors
1   Department of Medical Informatics Erasmus University Rotterdam, The Netherlands
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Publication History

Publication Date:
08 February 2018 (online)

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Abstract:

Mains interference in digitized electrocardiographic signals is often removed with a nonlinear filter, the so-called incremental estimaton filter. A prerequisite for proper functioning of the filter is that the variation of the signal is considerably slower than that of the disturbing interference. This condition will often not be true, especially during wave deflections. As a result, the filter will not fully remove the interference when present, or, alternatively, it may generate a sine wave in the absence of interference. These effects are analyzed and different solutions proposed, one of which is the use of new, very simple filters based on the incremental estimation technique.

Keywords

Mains Interference - Nonlinear Filter - Electrocardiogram
 

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