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Method of digital processing of photoplethysmogram signals for non-invasive monitoring of physiological parameters in real time
Glebov S. N.
1, Liamina Ju. V.
1, Mazing M. S.
1
1Institute for Analytical Instrumentation of the Russian Academy of Sciences, Saint Petersburg, Russia
Email: julia.liamina@gmail.com
A method for processing photoplethysmogram signals relying on window analysis (10 s) and a combination of a fourth-order Butterworth filter and a modified peak detection algorithm is proposed. It is demonstrated that the average absolute error of heart rate determination is 1.42 bpm with a signal processing time in a single window below 20 ms. The method is optimized for low-performance microcontrollers of wearable devices. Keywords: photoplethysmography, digital filtering, physiological state monitoring, real-time signal processing.
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