Real‑Time Fast Fourier Transform‑Based Notch Filter for Single‑Frequency Noise Cancellation: Application to Electrocardiogram Signal Denoising
Publish place: Journal of medical signals and sensors، Vol: 11، Issue: 1
Publish Year: 1400
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JMSI-11-1_007
تاریخ نمایه سازی: 28 تیر 1402
Abstract:
Despite the considerable improvement of the common‑mode rejection ratio of digital filtering
techniques, the electrocardiogram (ECG) traces recorded by commercialized devices are still
contaminated by residual power line interference (PLI). In this study, we address this issue by
proposing a novel real‑time filter adapted to single‑frequency noise cancellation and automatic power
line frequency detection. The filtering process is principally based on a point‑by‑point fast Fourier
transform and a judicious choice of the analysis window length. Intensive experiments conducted
on real and synthetic signals have shown that our filtering method offers very clean ECGs, due to
the suppression of spikes corresponding to the PLI and the preservation of spikes outside the filter
band. In addition, this method is characterized by its low computational complexity which makes
it suitable for real‑time cleaning of ECG signals and thus can serve for more accurate diagnosis in
computer‑based automated cardiac system.
Keywords:
Frequency detection , notch filter , physiological signals , power line interference removal , real‑time fast Fourier transform , spectral filtering
Authors
Anis Ben Slimane
Laboratory of Advanced Technology and Intelligent Systems, Sousse University, Sousse- Department of Industrial lectronics, National Engineering School of Sousse, Sousse University
Azza Ouled Zaid
SysCom Laboratory, National Engineering School of Tunis, University of Tunis EI Manar, Tunis, Tunisia