An Experimental Testbed for the Performance Evaluation of Optical Time Difference of Arrival Based Indoor Positioning

Time Difference of Arrival (TDoA) based Visible Light Positioning (VLP) and Optical Wireless Positioning (OWP) offer considerable potential over conventional Received Signal Strength (RSS) methods. The current state of the art in TDoA OWP is however limited concerning experimental assessments, mainly focusing on simulations. This work presents experimental TDoA measurements in a proof-of-concept setup. The measurement results demonstrate a 95th percentile accuracy of 5.3 cm in a 50×50 cm area, in the absence of reflections. The susceptibility to reflections is examined experimentally, demonstrating that the performance deterioration can easily be minimized by performing a recalibration.