In this paper, we propose a contact-less heartbeat monitoring system for in-vehicle R-R Interval (RRI) measurement using a UWB sensor. Our system extracts a heartbeat by noise filtering with a bandpass Butterworth filter to remove a noise caused by inside/outside of the driving vehicle. We carried out an experiment to evaluate the accuracy of RRI detection of our system by comparing it with MIMO radar, which is used widely for moving object detection. We evaluated the accuracy of RRI detection of our system by using Bland-Altman plot with the RRI obtained by myBeat, which is an existing contact-type heartbeat monitoring device. Consequently, the RRI measured by our system is more accurate than that measured by MIMO radar and is comparable to the RRI measured by myBeat.
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