TY - JOUR
T1 - A Concurrent Dual-Beam Phased-Array Doppler Radar Using MIMO Beamforming Techniques for Short-Range Vital-Signs Monitoring
AU - Nosrati, Mehrdad
AU - Shahsavari, Shahram
AU - Lee, Sanghoon
AU - Wang, Hua
AU - Tavassolian, Negar
N1 - Publisher Copyright:
© 1963-2012 IEEE.
PY - 2019/4
Y1 - 2019/4
N2 - This paper presents the theoretical and experimental results of a new approach for multitarget vital-signs monitoring using an electromagnetic-based Doppler radar. A phased-array radar is designed and implemented using a hybrid beamforming architecture to generate two simultaneous beams. The proposed system significantly mitigates the phase collision problem in the presence of multiple targets. Comprehensive discussions on the theory of multibeam systems alongside detailed simulations are provided. For the purpose of demonstration, a prototype dual-beam phased-array continuous-wave Doppler radar has been designed and implemented at 2.4 GHz. The system is fully characterized, and the measurement results confirm the feasibility of the proposed method. The experimental measurements show that for the first time, the breathing rates of two individuals can be monitored at the same time and using the same frequency. Several practical aspects of the system are examined, and a pilot study on the subject tracking is presented. The proposed dual-beam system prevents the phase collision of the signatures of the targets and hence provides multiperson detection capability to the system.
AB - This paper presents the theoretical and experimental results of a new approach for multitarget vital-signs monitoring using an electromagnetic-based Doppler radar. A phased-array radar is designed and implemented using a hybrid beamforming architecture to generate two simultaneous beams. The proposed system significantly mitigates the phase collision problem in the presence of multiple targets. Comprehensive discussions on the theory of multibeam systems alongside detailed simulations are provided. For the purpose of demonstration, a prototype dual-beam phased-array continuous-wave Doppler radar has been designed and implemented at 2.4 GHz. The system is fully characterized, and the measurement results confirm the feasibility of the proposed method. The experimental measurements show that for the first time, the breathing rates of two individuals can be monitored at the same time and using the same frequency. Several practical aspects of the system are examined, and a pilot study on the subject tracking is presented. The proposed dual-beam system prevents the phase collision of the signatures of the targets and hence provides multiperson detection capability to the system.
KW - Doppler radar
KW - dual beam
KW - hybrid beamforming (HBF)
KW - multiperson monitoring
KW - multitarget
KW - noncontact monitoring
KW - phased array
KW - vital-signs monitoring
UR - http://www.scopus.com/inward/record.url?scp=85064269271&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85064269271&partnerID=8YFLogxK
U2 - 10.1109/TAP.2019.2893337
DO - 10.1109/TAP.2019.2893337
M3 - Article
AN - SCOPUS:85064269271
SN - 0018-926X
VL - 67
SP - 2390
EP - 2404
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
IS - 4
M1 - 8621039
ER -