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Article

Radar-Based, Simultaneous Human Presence Detection and Breathing Rate Estimation

School of Electrical and Computer Engineering, Ben-Gurion University of The Negev, Beer-Sheva 8410501, Israel
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Author to whom correspondence should be addressed.
Academic Editors: Hyungsoon Im and James F. Rusling
Sensors 2021, 21(10), 3529; https://doi.org/10.3390/s21103529
Received: 4 March 2021 / Revised: 11 May 2021 / Accepted: 12 May 2021 / Published: 19 May 2021
(This article belongs to the Special Issue Neurophysiological Monitoring)
Human presence detection is an application that has a growing need in many industries. Hotel room occupancy is critical for electricity and energy conservation. Industrial factories and plants have the same need to know the occupancy status to regulate electricity, lighting, and energy expenditures. In home security there is an obvious necessity to detect human presence inside the residence. For elderly care and healthcare, the system would like to know if the person is sleeping in the room, sitting on a sofa or conversely, is not present. This paper focuses on the problem of detecting presence using only the minute movements of breathing while at the same time estimating the breathing rate, which is the secondary aim of the paper. We extract the suspected breathing signal, and construct its Fourier series (FS) equivalent. Then we employ a generalized likelihood ratio test (GLRT) on the FS signal to determine if it is a breathing pattern or noise. We will show that calculating the GLRT also yields the maximum likelihood (ML) estimator for the breathing rate. We tested this algorithm on sleeping babies as well as conducted experiments on humans aged 12 to 44 sitting on a chair in front of the radar. The results are reported in the sequel. View Full-Text
Keywords: micro-Doppler; occupancy detection; presence detection; vital signs; respiration; spectral-estimation micro-Doppler; occupancy detection; presence detection; vital signs; respiration; spectral-estimation
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MDPI and ACS Style

Regev, N.; Wulich, D. Radar-Based, Simultaneous Human Presence Detection and Breathing Rate Estimation. Sensors 2021, 21, 3529. https://doi.org/10.3390/s21103529

AMA Style

Regev N, Wulich D. Radar-Based, Simultaneous Human Presence Detection and Breathing Rate Estimation. Sensors. 2021; 21(10):3529. https://doi.org/10.3390/s21103529

Chicago/Turabian Style

Regev, Nir, and Dov Wulich. 2021. "Radar-Based, Simultaneous Human Presence Detection and Breathing Rate Estimation" Sensors 21, no. 10: 3529. https://doi.org/10.3390/s21103529

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