ArticleScientific reports2024
Estimation of phase distortions of the photoplethysmographic signal in digital IIR filtering.
Article in Scientific reports, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed.
- Experimental Analysis on the Effect of Contact Pressure and Activity Level as Influencing Factors in PPG Sensor Performance.Sensors (Basel, Switzerland) · 2025Trial
- Harmonic-Selective Gaussian Filtering for Morphology and Timing Preservation in PPG Signals.Sensors (Basel, Switzerland) · 2026Article
- Validation of a Wearable Photoplethysmography-Based Sensor for Compensatory Reserve Measurement Monitoring in Simulated Human Hemorrhage.Sensors (Basel, Switzerland) · 2026Article
- A Study on Autonomous Driving Motion Sickness from the Perspective of Multimodal Human Signals.Sensors (Basel, Switzerland) · 2026Article
- Vascular waveform analysis using Bayesian pulse deconvolution.bioRxiv : the preprint server for biology · 2026Article
- Bidirectional coupling of physiology and emotions reveals unique speaker-listener dynamics.Social cognitive and affective neuroscience · 2026Article
- Continuous bidirectional coupling of heart rate variability and emotions in dyad speaker-listener dynamics reveals unique interpersonal synchronization.Frontiers in systems neuroscience · 2026Article
- Article
- Photoplethysmography acceleration indices as digital biomarkers of cardiometabolic health.Frontiers in digital health · 2026Article
- What the Heart Can(not) Tell: Potential and Pitfalls of Biometric Recognition Methods Based on Photoplethysmography.Sensors (Basel, Switzerland) · 2025Article
- Design of infinite impulse response maximally flat stable digital filter with low group delay.Scientific reports · 2025Article
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Authors and funding
4 authors.
Funding
Abstract
Pre-processing of the photoplethysmography (PPG) signal plays an important role in the analysis of the pulse wave signal. The task of pre-processing is to remove noise from the PPG signal, as well as to transmit the signal without any distortions for further analysis. The integrity of the pulse waveform is essential since many cardiovascular parameters are calculated from it using morphological analysis. Digital filters with infinite impulse response (IIR) are widely used in the processing of PPG signals. However, such filters tend to change the pulse waveform. The aim of this work is to quantify the PPG signal distortions that occur during IIR filtering in order to select a most suitable filter and its parameters. To do this, we collected raw finger PPG signals from 20 healthy volunteers and processed them by 5 main digital IIR filters (Butterworth, Bessel, Elliptic, Chebyshev type I and type II) with varying parameters. The upper cutoff frequency varied from 2 to 10 Hz and the filter order-from 2nd to 6th. To assess distortions of the pulse waveform, we used the following indices: skewness signal quality index (S
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