RF-Heartbeat: Robust and Contactless Heartbeat Monitoring Based on FMCW Radar
preprintposted on 22.07.2021, 16:55 by Jian PuJian Pu, Hao Zhang
We propose RF-Heartbeat, a robust heartbeat monitoring system based on FMCW radar, enabling accurate inter-beat interval (IBI) estimation. Dynamic programming is implemented to improve the robustness of the template matching algorithm. Template matching requires a high similarity of heartbeat shape and suffers from shape variation of heartbeat signal obtained by radar. With heartbeat signal, generated template, and heart rate variability (HRV) prior knowledge, global optimal heart segmentation can be achieved to solve this problem. In addition, an optimal range bin selection algorithm is proposed. Therefore, when the user is in different positions and postures, RF-Heartbeat can always obtain high-quality heartbeat signals.