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Comparative Analysis of Photoplethysmography Signal Quality from Right and Left Index Fingers
Department of Electrical Engineering, Faculty of Engineering Science Technology and Management, Ziauddin University, Karachi 74700, Pakistan.
Faculty of Computing and Applied Sciences, Sir Syed University of Engineering and Technology, Karachi 75300, Pakistan.
Department of Engineering, Faculty of Science and Technology, Nottingham Trent University, Nottingham, NG118NS, United Kingdom.
Data Acquisition, Processing, and Predictive Analytics Lab, NCBC, Ziauddin University, Karachi 74700, Pakistan.
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2023 (engelsk)Inngår i: Traitement du signal, ISSN 0765-0019, E-ISSN 1958-5608, Vol. 40, nr 5, s. 2214-2199Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Photoplethysmography (PPG) has emerged as an increasingly attractive signal for non-invasive physiological measurements, owing to its simplicity, cost-effectiveness, and broad applicability spanning cardiovascular to respiratory systems. The burgeoning interest in PPG signal processing has facilitated its extensive incorporation in wearable devices, thus stimulating active research in this field. The present study undertakes a comprehensive evaluation to discern the optimal index finger (right or left) for PPG data acquisition and subsequent filtration, appraised through the lens of the signal-to-noise ratio (SNR) of the filtered signal. An analysis conducted on signals contaminated with white Gaussian noise unveiled that the Savitzky-Golay filter (a polynomial filter) with a window size of three outperformed other window lengths, rendering the highest SNR. Among the Infinite Impulse Response (IIR) filters compared; the Chebyshev I filter emerged as superior. Interestingly, the right index finger consistently demonstrated a higher mean SNR across filters: 0.49% for the Savitzky-Golay filters, 4.32% for the Butterworth (order 6), 7.71% for the Chebyshev I (order 10), and 4.02% for the Chebyshev II (order 4), relative to the left index finger for PPG signals perturbed by white Gaussian noise. These findings provide an insightful perspective for future research and development in wearable devices, suggesting potential superiority of the right index finger for PPG signal acquisition and filtration.

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2023. Vol. 40, nr 5, s. 2214-2199
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URN: urn:nbn:se:mdh:diva-64862DOI: 10.18280/ts.400537ISI: 001094288100037Scopus ID: 2-s2.0-85177818395OAI: oai:DiVA.org:mdh-64862DiVA, id: diva2:1815552
Tilgjengelig fra: 2023-11-29 Laget: 2023-11-29 Sist oppdatert: 2023-12-07bibliografisk kontrollert

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