Citation link:
Authors:
Mihov, Georgy Slavtchev
Title:
Investigation of the linearity criterion used by the subtraction method for removing powerline interference from ECG
Date of Issue:
2006
Is Part of:
Proceedings of the Technical University – Sofia, 56(2), 2006, pp. 218-223
Publisher:
TU - Sofia
Identifiers:
1311-0829 [issn]
Type:
Article
Language:
eng
Subject:
digital filtering; ECG filtering; interference rejection
Abstract:
The detection of linear segments in ECG signals is the most important phase of the subtraction method for removing powerline interference. This is done by a criterion for linearity using second differences in the sampled signal. The criterion is interpreted as mathematical estimate of the acceleration within the segment and is substituted by a non-recursive digital filter. The transfer functions of simple and complex linearity criteria have been synthesized. They have been used for analysis of existing solutions. Conclusions have been formulated as a result of numerous and thorough experiments and a qualitative estimate of the criteria efficiency are confirmed. Requirements for the equivalent filter have been formulated. It was found that the filter analyzing the longest section of the signal is closest to the complex criteria and can be independently applied.
Description:
Reviewer prof. Ivan Dotsinsky. - Formulas, tables, diagr. - References, pp. 223
