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A digital signal processor for Doppler radar sensing of vital signs

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5 Author(s)
B. Lohman ; Dept. of Electr. Eng., Delft Univ. of Technol., Netherlands ; O. Boric-Lubecke ; V. M. Lubecke ; P. W. Ong
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A signal processor for the determination of respiration and heart rates in Doppler radar measurements is described. The processor can reliably calculate both rates for a subject at distances as large as 2 m. The rate determination is based on autocorrelation and uses several enhancement techniques, including a center clipper. Several representative results are included to show the future potential of using the processor for this purpose. Calculated heart rates agree for over 88% of the time with the reference rate, within a 2% margin, for all datasets. These results indicate excellent prospects for remote monitoring of vital signs through noncontact radar techniques.

Published in:

IEEE Engineering in Medicine and Biology Magazine  (Volume:21 ,  Issue: 5 )