Summary
International Symposium on Antennas and Propagation
2011
Session Number:FrF2
Session:
Number:FrF2-1
Breath Detection Method Using TimeVariant MIMO Channel
Masaki Nango, Naoki Honma, Kentaro Nishimori, Hiroaki Sato,
pp.-
Publication Date:2011/10/25
Online ISSN:2188-5079
Summary:
This paper has proposed a noncontact breath detection method using the time variant MIMO channel. The Frequency response of the measured correlation matrix indicates large amplitude at 0.3Hz corresponding to the breath rate and it is confirmed that can detect the breath of biological body by using the MIMO channel. The comparison result of the methods using correlation matrix components and SISO channel indicates that the method using nondiagonal component of the correlation matrix shows the highest detection sensitivity and it is confirmed that the proposed method outperforms the method using SISO channel. The comparison result of measurement condition indicates that detection sensitivity is high when antenna height is 1.14 m that corresponds to the position of the chest of the biological body. It is found that two arrays should be placed closely enough for suppressing the direct path in order to obtain further high sensitivity. These results support the effectiveness of the MIMO sensor in the breath detection of the biological body.