Research Article

A Noncontact Vital Signs (NCVS) System for Potential Patient Monitoring Enabled by Robust Software Defined Radio (SDR)

Y. Liu 1, C. Sweeney 1, J. Mayeda 1, J. Hawkins 1, S. Rojas 1, P. E. Lie 2, T. Q. Nguyen 1 2, D. Y. C. Lie 1 2 *
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International Journal of Clinical Medicine and Bioengineering, 1(1), December 2021, 3-11, https://doi.org/10.35745/ijcmb2021v01.01.0002
Published: 30 September 2021
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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.

CITATION (APA)

Liu, Y., Sweeney, C., Mayeda, J., Hawkins, J., Rojas, S., Lie, P. E., Nguyen, T. Q., & Lie, D. Y. C. (2021). A Noncontact Vital Signs (NCVS) System for Potential Patient Monitoring Enabled by Robust Software Defined Radio (SDR). International Journal of Clinical Medicine and Bioengineering, 1(1), 3-11. https://doi.org/10.35745/ijcmb2021v01.01.0002