3-D Motion Capture of an Unmodified Drone with Single-chip Millimeter Wave Radararxiv.org#UWB#3D#motion capture#optical#doppler#signals#rotating#propellers#W49#DEC#2023#arxiv.org·arxiv.org·Dec 6, 20233-D Motion Capture of an Unmodified Drone with Single-chip Millimeter Wave Radar