Citation link:
Authors:
Mihov, Georgy Slavtchev; Ivanov, Ratcho Marinov; Levkov, Chavdar Lev
Title:
Subtraction method for removing powerline interference from ECG in case of frequency deviation
Date of Issue:
2006
Is Part of:
Proceedings of the Technical University – Sofia, 56(2), 2006, pp. 212-217
Publisher:
TU - Sofia
Identifiers:
1311-0829 [issn]
Type:
Article
Language:
eng
Subject:
digital filtering; ECG filtering; interference rejection
Abstract:
Extension of the subtraction method for power-line interference removing from ECG signals is proposed in case of power-line frequency variations. The existing version suitable for non-multiplicity between sampling rate and interference frequency is improved and adapted to dynamic deviations around the rated power-line frequency. The ongoing interference values, which are stored in temporary buffer, are used for recalculation of the filter’s coefficients. A simplified algorithm is elaborated and experimented in case of odd sample number in one period of the interference. The corresponding formulae for even sample number are also derived. The proposed procedure successfully compensates abrupt and gradual changes of the power-line frequency allowed by the standards.
Description:
Reviewer prof. Ivan Dotsinsky. - Formulas, diagr. - References, pp. 217
