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Radar remote monitoring of vital signs

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5 Author(s)
Changzhi Li ; Dept. of Electr. & Comput. Eng., Univ. of Florida, Gainesville, FL ; Cummings, J. ; Lam, J. ; Graves, E.
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Medical technology has improved remarkably over the past few generations, becoming more sophisticated and less invasive as the years progress. Now, with microwave Doppler radar phase modulation, noncontact respiration and heartbeat monitoring offers an attractive alternative to commonly prescribed chest-strap monitors. Doppler radar uses double-sideband transmission for vital sign detection from four sides of a human body. An unmodulated radio-frequency signal is transmitted toward the human body, where it is phase-modulated by the periodic physiological movement and reflected back to the receiver. The radar receiver captures the reflected signal and demodulates it to extract the vital sign signal components.

Published in:

Microwave Magazine, IEEE  (Volume:10 ,  Issue: 1 )