NDLI: Signal processing methods for non-contact cardiac detection using Doppler radar

Content Provider	IEEE Xplore Digital Library
Author	Vasu, V. Heneghan, C. Arumugam, T. Sezer, S.
Copyright Year	2010
Description	Author affiliation: BiancaMed Limited, Dublin, Ireland (Heneghan, C.) \|\| ECU, Queen s University Belfast, United Kingdom (Vasu, V.; Arumugam, T.; Sezer, S.)
Abstract	We investigate two signal processing methods, time and frequency-based approaches, for non-contact cardiac detection. A 5.8-GHz Doppler radar sensor was used for non-contact measurement of respiration and heart rate from stationary and semi-stationary subjects at a distance of 0.5 to 1.5 meters. We report on the accuracy of the heart rate measurements obtained using the two signal processing approaches, as compared to a reference heart rate obtained using a pulse oximeter. Simultaneous Photoplethysmograph (PPG) and non-contact sensor recordings were recorded over fifteen minute periods for five healthy subjects (4M/1F, ages 29.2±4.32 yrs) One algorithm is based on extraction of heart rate using spectral analysis and a second algorithm is based on automated detection of individual peaks associated with each cardiac cycle. Peaks were also extracted manually for comparison with the automated method. The peak-detection method was less accurate than the spectral method but suggests the possibility of acquiring beat by beat data. It was found that the signal SNR affects the ability to detect heart rates. An increase in SNR could lead to more accurate rates being obtained. The results described provide an estimate of the accuracy expected when measuring heart rate using a Doppler radar sensor. Non-contact measurement of heart rate will be useful in chronic disease monitoring for conditions such as heart failure and cardiovascular disease.
Starting Page	368
Ending Page	373
File Size	414343
Page Count	6
File Format	PDF
ISBN	9781424489329
ISSN	15206130
e-ISBN	9781424489336
e-ISBN	9781424489343
DOI	10.1109/SIPS.2010.5624817
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-10-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	non-contact monitoring Biomédical signal processing heart rate detection Doppler radar
Content Type	Text
Resource Type	Article

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