Key result
An adaptive notch filter algorithm successfully estimated and removed power-line interference at 49.13 Hz from a high-resolution ECG signal without requiring a reference signal.
A novel adaptive algorithm using power spectral density and linear interpolation effectively removes power-line interference from high-resolution ECG signals without requiring a reference signal.
May enable reference-free power-line interference removal in ECG research; leaves open clinical validation and adoption.
The paper presents a novel approach to adaptive removal of power-line interference, taken to be at 50 Hz, from high resolution ECG sampled at 1 KHz. ECG data consists of 12 lead data. Each of the 12 leads contains power line interference at the time of acquisition. So power line interference needs to be removed from each lead. An approach that uses the power spectral density over the range of interest is used to determine the exact frequency of the interfering component and filter coefficients for the desired notch filter are determined using an interpolation technique.
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Sadiq et al. (2012) studied Power-line interference in ECG. Adaptive notch filter algorithm was evaluated on Removal of power-line interference. An adaptive notch filter algorithm successfully estimated and removed power-line interference at 49.13 Hz from a high-resolution ECG signal without requiring a reference signal.
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