A digital signal processor for Doppler radar sensing of vital signs

Author

Lohman, B. ; Boric-Lubecke, O. ; Lubecke, V.M. ; Ong, P.W. ; Sondhi, M.M.

Author_Institution

Dept. of Electr. Eng., Delft Univ. of Technol., Netherlands

Volume

21

Issue

5

fYear

2002

Firstpage

161

Lastpage

164

Abstract

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.

Keywords

Doppler measurement; Doppler radar; cardiology; medical signal processing; patient monitoring; pneumodynamics; 2 m; Doppler radar sensing; autocorrelation; center clipper; datasets; digital signal processor; heart rate; noncontact radar techniques; reference rate; respiration monitoring; vital signs; Costs; Digital signal processing chips; Digital signal processors; Doppler radar; Frequency; Heart rate; Medical services; Microwave devices; Patient monitoring; Remote monitoring; Diagnosis, Computer-Assisted; Heart Rate; Humans; Microwaves; Monitoring, Physiologic; Movement; Radar; Respiratory Mechanics; Sensitivity and Specificity; Signal Processing, Computer-Assisted;

fLanguage

English

Journal_Title

Engineering in Medicine and Biology Magazine, IEEE

Publisher

ieee

ISSN

0739-5175

Type

jour

DOI

10.1109/MEMB.2002.1044188

Filename

1044188