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International Journal of Clinical Medicine and Bioengineering
ISSN:2737-534X


 
 IJCMB 2021/12
Vol.1, Iss.1 : 3-11
https://doi.org/10.35745/ijcmb2021v01.01.0002
A Noncontact Vital Signs (NCVS) System for Potential Patient Monitoring Enabled by Robust Software Defined Radio (SDR)

Y. Liu1, C. Sweeney1, J. Mayeda1, J. Hawkins1, S. Rojas1, P.E. Lie2, T.Q. Nguyen3 and D.Y.C. Lie3*
1Dept. of Electrical & Computer Eng., Texas Tech University, Lubbock, Texas, USA
2Dept. of Otolaryngology/Surgery, Texas Tech University Health Sciences Center, Lubbock, Texas, USA
3Dept. of Electrical & Computer Eng., Texas Tech University, Lubbock, Texas, USA/ Dept. of Otolaryngology/Surgery, Texas Tech University Health Sciences Center, Lubbock, Texas, USA


Abstract:
This research proposes a robust non-contact vital signs (NCVS) sensor system for continuously monitoring the human respiration rate (RR) and heart rate (HR) in a distance of around1.3 m. The novel Doppler-based NCVS sensor system is realized using an SDR (software defined radio) unit with optimized transmit/receive gain in commercial broadband, which filters intermediate frequency (IF) and operates at 2.4 GHz ISM band using a pair of small PCB antennas. When compared with the vital signs data measured by traditional contact-based sensors, the NCVS sensing system demonstrates excellent accuracy in real-time RR/HR monitoring within 0.5/3 BPM (breath/beat per minute). We have obtained an IRB (Internal Review Board) approval to start a small clinical trial at Texas Tech University Health Sciences Center (TTUHSC) soon, hoping to use this system to effectively monitor vital signs of COVID-19 patients and to help telehealth delivery in the post-COVID-19 era.

Keywords:  Biosensor; Intermediate Frequency (IF); Non-contact Vital Signs (NCVS); Respiration Rate (RR); Software Defined Radio (SDR)

*Corresponding author; e-mail: Donald.Lie@ttu.edu
© 2021   , ISSN 2737-534X




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