Key result
Modified variational mode decomposition outperforms traditional notch filtering in removing power line interference from ECGs.
Why the study?
Power line interferences at 50/60 Hz corrupt ECG signals and complicate accurate diagnosis, requiring effective removal techniques that preserve signal characteristics.
A modified variational mode decomposition approach effectively removes power line interference from ECG signals without compromising actual signal characteristics.
Power line interferences (PLI) occurring at 50/60 Hz can corrupt the biomedical recordings like ECG signals and which leads to an improper diagnosis of disease conditions. Proper interference cancellation techniques are therefore required for the removal of these power line disturbances from biomedical recordings. The non-linear time varying characteristics of biomedical signals make the interference removal a difficult task without compromising the actual signal characteristics. In this paper, a modified variational mode decomposition based approach is proposed for PLI removal from the ECG signals. In this approach, the central frequency of an intrinsic mode function is fixed corresponding to the normalized power line disturbance frequency. The experimental results show that the PLI interference is exactly captured both in magnitude and phase and are removed. The proposed approach is experimented with ECG signal records from MIT-BIH Arrhythmia database and compared with traditional notch filtering.
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Mohan et al. (2016) studied ECG signals with power line interference. Modified variational mode decomposition vs. Traditional notch filtering was evaluated on Power line interference removal. A modified variational mode decomposition approach successfully captured and removed power line interference from ECG signals when compared with traditional notch filtering.
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