Complex filters for the subtraction procedure for power-line interference removal from ECG Online publication date: Mon, 09-Dec-2013
by Georgy Mihov
International Journal of Reasoning-based Intelligent Systems (IJRIS), Vol. 5, No. 3, 2013
Abstract: The article continues the generalisation of the subtraction procedure for removing power-line interference from ECG for the common case of non-multiplied sampling and power-line frequency deviation. The stage of linear segments detection is the most important stage in the subtraction method. A new complex modification of the linear criterion is introduced that retains all needed features for non-multiplied sampling. A new manner for complex composition of filters for PL interference extracting from linear segments of the ECG signal and for PL interference restoring for non-linear segment is introduced. The proposed filters are composed by summarising two partial simple moving averaging filters. Transfer functions of complex filters have been synthesised and analysed. The analysis allows a qualitative estimation to be done. Theoretical approaches are supported by numerous practical experiments in MATLAB environment.
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