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학술지 Blockwise PPG Enhancement Based on Time-Variant Zero-Phase Harmonic Notch Filtering
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저자
박찬기, 신현순, 이보름
발행일
201704
출처
Sensors, v.17 no.4, pp.1-14
ISSN
1424-8220
출판사
MDPI AG
DOI
https://dx.doi.org/10.3390/s17040860
협약과제
16HH3300, 심리인지 기반 안전한 병영 생활관리 시스템 기술 개발, 신현순
초록
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.
키워드
Forward-backward filtering, Linear time-variant, Motion artifact, Photoplethysmogram, Single-input
KSP 제안 키워드
Forward-backward filtering, Healthcare Systems, Linear time-variant, Mobile Healthcare, Motion artifact, Phase distortion, Real-world, Reduction algorithm, Reduction method, Single-input, Wearable and mobile
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