Effects of respiration depth on human body radar cross section Using 2.4GHz continuous wave radar

In this study, it was tested whether deep and shallow breathing has an effect on the cardiopulmonary radar cross-section (RCS). Continuous wave radar with quadrature architecture at 2.4GHz was used to test 2 human subjects breathing deep and shallow for 30 seconds each while seated 2 meters away fro...

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Bibliographic Details
Published inConference proceedings (IEEE Engineering in Medicine and Biology Society. Conf.) Vol. 2017; pp. 4070 - 4073
Main Authors Lee, Alexander, Xiaomeng Gao, Jia Xu, Boric-Lubecke, Olga
Format Conference Proceeding Journal Article
LanguageEnglish
Published United States IEEE 01.07.2017
Subjects
Cameras
Displacement measurement
Doppler radar
Radar cross-sections
Sternum
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ISSN1557-170X
DOI10.1109/EMBC.2017.8037750

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Summary:In this study, it was tested whether deep and shallow breathing has an effect on the cardiopulmonary radar cross-section (RCS). Continuous wave radar with quadrature architecture at 2.4GHz was used to test 2 human subjects breathing deep and shallow for 30 seconds each while seated 2 meters away from the radar. A retro-reflective marker was placed on the sternum of each subject and measured by infrared motion capture cameras to accurately track displacement of the chest. The quadrature radar outputs were processed to find the radius of the arc on the IQ plot using a circle-fitting algorithm. Results showed that the effective RCS ratio of deep to shallow breathing for subjects 1 and 2 was 6.99 and 2.24 respectively.
ISSN:1557-170X
DOI:10.1109/EMBC.2017.8037750