Human physiological parameter monitoring based on FMCW radar

Le résumé fourni par la source

The escalating demand for non-contact vital sign monitoring has catalyzed the advancement of radar-based health solutions. Conventional contact sensors are often limited by motion artifacts, electrode degradation, and restricted battery life. To overcome these limitations, a compact, low-power (<850 mW) monitoring system has been developed, integrating an STM32 microcontroller with a customized Frequency-Modulated Continuous-Wave (FMCW) radar module. The system utilizes a comprehensive signal-processing pipeline that incorporates Fast Fourier Transform, phase-unwrapping algorithms, IIR band-pass filtering, and multi-target detection to accurately extract respiratory and cardiac micro-movements in real time. Experimental validation involving six healthy volunteers at distances up to 1.5 meters demonstrates average measurement errors of 2.95% for respiratory rate and 1.30% for heart rate, exceeding the performance of commercial radar modules in both stability and precision. Key innovations include an optimized power-supply design, real-time multi-subject tracking capability, and resilience in complex environments. The results confirm the feasibility of all-weather, non-invasive health monitoring using radar technology and establish a strong foundation for deployment in home-based elderly care, clinical settings, and IoT-integrated healthcare systems.

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