@inproceedings{1c06fff18dad4854a60e2dca6fb7008a,
title = "Comprehensive Vital Sign Detection using a Wrist Wearable Nonlinear Target and a 5.8-GHz ISM Band Intermodulation Radar",
abstract = "Nonlinear components can be used to generate third order intermodulation frequencies. Taking advantage of this phenomenon the movement of a nonlinear target can be monitored and distinguished from background clutter. This paper discusses the use of an intermodulation radar, operating in the 5.8-GHz ISM band, and a passive nonlinear tag, located on the wrist, to monitor human vital signs and more specifically to improve remote monitoring of the heart rate. The non-ideal background clutter rejection of an intermodulation radar allowed for the respiration rate to also be monitored. Since the movement of the chest reflects the two individual tones from the transmitter and not the third order intermodulation frequency, for which the receiver is tuned, the respiratory frequency component has a scaled amplitude in comparison to what is seen with the use of a Doppler radar. This prevents the heart rate from being indistinguishable from the harmonics of the respiration.",
keywords = "Intermodulation, clutter rejection, nonlinear target, vital signs, wearable passive tag",
author = "William McDonnell and Ashish Mishra and Changzhi Li",
note = "Publisher Copyright: {\textcopyright} 2020 IEEE. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.; null ; Conference date: 26-01-2020 Through 29-01-2020",
year = "2020",
month = jan,
doi = "10.1109/RWS45077.2020.9049979",
language = "English",
series = "IEEE Radio and Wireless Symposium, RWS",
publisher = "IEEE Computer Society",
pages = "123--126",
booktitle = "RWW 2020 - 2020 IEEE Radio and Wireless Symposium",
}