Estimating Living-Body Location Using Bistatic MIMO Radar in Multi-Path Environment

This paper proposes a method that uses bistatic MultipleInput Multiple-Output (MIMO) radar to locate living-bodies. In this method, directions of living-bodies are estimated by the MUltiple SIgnal Classification (MUSIC) method at the transmitter and receiver, where the Fourier transformed virtual Single-Input Multiple-Output (SIMO) channel matrix is used. Body location is taken as the intersection of the two directions. The proposal uses a single frequency and so has a great advantage over conventional methods that need a wide frequency band. Also, this method can be used in multipath-rich environments such as indoors. An experiment is performed in an indoor environment, and the MIMO channels yielded by various subject numbers and positions are measured. The result indicates that the proposed method can estimate multiple living-body locations with high accuracy, even in multipath environments. key words: MIMO, living-body location, DOA estimation, microwave sensor, array antenna

[1]  Naoki Honma,et al.  Biological activity detection method using MIMO system , 2013 .

[2]  A. Hakhoumian,et al.  PORTABLE NON-CONTACT MICROWAVE DOPPLER RADAR FOR RESPIRATION AND HEARTBEAT SENSING , 2012 .

[3]  A. Mase,et al.  Microwave reflectometric measurement of heart-rate variability and stress evaluation , 2012, 2012 Asia Pacific Microwave Conference Proceedings.

[4]  Kentaro Nishimori,et al.  Using Multiple Antenna Systems for Living-Body Sensing , 2015 .

[5]  Atsushi Mase,et al.  Measurement of heart rate variability and stress evaluation by using microwave reflectometric vital signal sensing. , 2010, The Review of scientific instruments.

[6]  James C. Lin,et al.  Microwave Measurement of Respiration , 1975 .

[7]  J.M. Park,et al.  Wireless vital signal detection systems and its applications at 1.9GHz and 10GHz [biomedical applications] , 2003, IEEE Antennas and Propagation Society International Symposium. Digest. Held in conjunction with: USNC/CNC/URSI North American Radio Sci. Meeting (Cat. No.03CH37450).

[8]  Yong-Jun An,et al.  Detection of Human Vital Signs and Estimation of Direction of Arrival Using Multiple Doppler Radars , 2010 .

[9]  Jenshan Lin,et al.  A microwave radio for Doppler radar sensing of vital signs , 2001, 2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157).

[10]  Naoki Honma,et al.  Localizing multiple target using bistatic MIMO radar in multi-path environment , 2014, 2014 IEEE International Workshop on Electromagnetics (iWEM).

[11]  Naoki Honma,et al.  Experimental Evaluation of Estimating Living-Body Direction Using Array Antenna for Multipath Environment , 2014, IEEE Antennas and Wireless Propagation Letters.

[12]  Fadel Adib,et al.  Multi-Person Motion Tracking via RF Body Reflections , 2014 .

[13]  Yoichi Hori,et al.  Detection of Abnormal Action Using Image Sequence for Monitoring System of Aged People , 2002 .

[14]  Naoki Honma,et al.  Localizing living body using bistatic MIMO radar in multi-path environment , 2014, The 8th European Conference on Antennas and Propagation (EuCAP 2014).

[15]  R. O. Schmidt,et al.  Multiple emitter location and signal Parameter estimation , 1986 .