Citation link:
Authors:
Mihov, Georgy Slavtchev; Михов, Георги Славчев; Ivanov, Ratcho Marinov; Иванов, Рачо Маринов; Levkov, Chavdar; Левков, Чавдар
Title:
Subtraction method for removing a powerline interference from ECG: case of powerline frequency deviation and non-multiple samlping
Date of Issue:
2007
Is Part of:
Proceedings of the Technical University – Sofia, 57(2), 2007, pp. 94-100
Publisher:
TU - Sofia
Identifiers:
1311-0829 [issn]
Type:
Article
Language:
eng
Abstract:
Extension of the subtraction method for removing from ECG signals a power-line interference, which deviates around rated value and non-multiple sampling rate, is proposed. A permanent criterion for finding linear segments in ECG is used and a new modification of the linear criterion is introduced that retains needed features for non-multiple sampling. Simplified formulas for extrapolating the interference in non-linear segments of ECG and for dynamic recalculation of filter’s coefficients are derivate too. A simplified algorithm is elaborated and experimented. The existing version is improved and adapted to the dynamic deviations around the rated power-line frequency. Experiments with 60 Hz power-line frequency show that the proposed procedure successfully compensates abrupt and gradual changes of the power-line frequency allowed by the standards.
Description:
Reviewer prof. Stefan Ovcharov. - Formulas, diagr. - References, pp. 100
