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Sensors 2018, 18(7), 2254; https://doi.org/10.3390/s18072254

Estimation of Human Body Vital Signs Based on 60 GHz Doppler Radar Using a Bound-Constrained Optimization Algorithm

1
Zhejiang Provincial Key Laboratory of Information Processing, Communication and Networking (IPCAN), College of Information Science and Electronic Engineering (ISEE), Zhejiang University, Hangzhou 310027, China
2
Sorbonne Universités, UR2, L2E, F-75005 Paris, France
3
Sorbonne University, UTC CNRS UMR 7338, Biomechanics and Bioengineering (BMBI), University of Technology of Compiègne, BP 20529, Rue Personne de Roberval, 60205 Compiègne, France
*
Authors to whom correspondence should be addressed.
Received: 1 May 2018 / Revised: 7 July 2018 / Accepted: 10 July 2018 / Published: 12 July 2018
(This article belongs to the Section Physical Sensors)
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Abstract

In this study, a bound-constrained optimization algorithm is applied for estimating physiological data (pulse and breathing rate) of human body using 60 GHz Doppler radar, by detecting displacements induced by breathing and the heartbeat of a human subject. The influence of mutual phasing between the two movements is analyzed in a theoretical framework and the application of optimization algorithms is proved to be able to accurately detect both breathing and heartbeat rates, despite intermodulation effects between them. Different optimization procedures are compared and shown to be more robust to receiver noise and artifacts of random body motion than a direct spectrum analysis. In case of a large-scale constrained bound, a parallel optimization procedure executed in subranges is proposed to realize accurate detection in a reduced span of time. View Full-Text
Keywords: 60 GHz Doppler radar; bound-constrained optimization algorithm; breathing and heartbeat rate detection 60 GHz Doppler radar; bound-constrained optimization algorithm; breathing and heartbeat rate detection
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Zhang, T.; Sarrazin, J.; Valerio, G.; Istrate, D. Estimation of Human Body Vital Signs Based on 60 GHz Doppler Radar Using a Bound-Constrained Optimization Algorithm. Sensors 2018, 18, 2254.

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