Premium
Direct conversion Doppler radar vital sign detection system using power management technique
Author(s) -
Lee ChieIn,
Lin YanTing,
Chen JhihJie,
Lin WeiCheng
Publication year - 2014
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.28505
Subject(s) - heartbeat , electronic engineering , radar , doppler radar , amplifier , power (physics) , pulse doppler radar , microwave , computer science , electrical engineering , engineering , telecommunications , physics , cmos , radar imaging , computer security , quantum mechanics
ABSTRACT This article is the first to present a low power consumption direct conversion Doppler radar vital sign detection system using a power management technique to detect biomedical signals. The optimal pulse bias with simultaneous switching noise considered was designed to decrease power consumption of the sensor. A noncontact vital sign detection measurement using the optimal pulse bias was performed on a human subject. Based on experimental results, the presented simple and low power system can accurately detect human cardiopulmonary activity, including respiration and heartbeat. Calculated physiological signal amplitudes based on a spectral analysis validates the detection result from presented work. When compared with the sensor using a power amplifier, the proposed sensor can achieve low power dissipation for biomedical monitoring and green energy applications. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2167–2174, 2014