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Journal Article Blockwise PPG Enhancement Based on Time-Variant Zero-Phase Harmonic Notch Filtering
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Authors
Chanki Park, Hyunsoon Shin, Boreom Lee
Issue Date
2017-04
Citation
Sensors, v.17, no.4, pp.1-14
ISSN
1424-8220
Publisher
MDPI AG
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.3390/s17040860
Project Code
16HH3300, Development of Military Life Management System based on Emotion Recognition, Shin Hyun Soon
Abstract
So far, many approaches have been developed for motion artifact (MA) reduction from photoplethysmogram (PPG). Specifically, single-input MA reduction methods are useful to apply wearable and mobile healthcare systems because of their low hardware costs and simplicity. However, most of them are insufficiently developed to be used in real-world situations, and they suffer from a phase distortion problem. In this study, we propose a novel single-input MA reduction algorithm based on time-variant forward-backward harmonic notch filtering. To verify the proposed method, we collected real PPG data corrupted by MA and compared it with existing single-input MA reduction methods. In conclusion, the proposed zero-phase line enhancer (ZLE) was found to be superior for MA reduction and exhibited zero phase response.
KSP Keywords
Forward and Backward, Healthcare Systems, Mobile Healthcare, Motion artifact, Phase distortion, Real-world, Reduction algorithm, Reduction method, Single-input, Wearable and mobile, Zero phase
This work is distributed under the term of Creative Commons License (CCL)
(CC BY)
CC BY