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Arabian Journal for Science and Engineering

Erschienen in:

03.02.2021 | Research Article-Electrical Engineering

Denoising of Electrocardiogram Signal Using S-Transform Based Time–Frequency Filtering Approach

verfasst von: Ankita Mishra, Sitanshu Sekhar Sahu, Rajeev Sharma, Sudhansu Kumar Mishra

Erschienen in: Arabian Journal for Science and Engineering | Ausgabe 10/2021

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Abstract

Electrocardiogram (ECG) signals are damaged by various types of noise during acquisition and transmission which may mislead the analysis. In this paper, an automated denoising technique based on time–frequency filtering approach is proposed. The S-transform based time–frequency method with morphological processing is employed to visualize the spectrum of the ECG signal. The time–frequency plane is surface fitted to estimate the noise and then a threshold is used to eliminate it. The proposed method has been assessed with numerous abnormal and normal ECG signals selected from the MIT-BIH normal sinus rhythm database. Several noises with varying signal-to-noise ratio are considered for the simulation study. The results showed that the proposed technique is superior to the existing wavelet-based approach. It significantly reduces the mean square error, percentage root mean square difference and improves the signal-to-noise ratio (SNR). Moreover, at lower SNR condition, the proposed approach efficiently suppresses the noise. In the proposed approach, the requirement of the reference signal is eliminated; and at the same time, the structural information is preserved in the denoised signal.

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Titel: Denoising of Electrocardiogram Signal Using S-Transform Based Time–Frequency Filtering Approach
verfasst von: Ankita Mishra
Sitanshu Sekhar Sahu
Rajeev Sharma
Sudhansu Kumar Mishra
Publikationsdatum: 03.02.2021
Verlag: Springer Berlin Heidelberg
Erschienen in: Arabian Journal for Science and Engineering / Ausgabe 10/2021
Print ISSN: 2193-567X
Elektronische ISSN: 2191-4281
DOI: https://doi.org/10.1007/s13369-021-05333-z

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