Non-Line-Of-Sight Ranging via Ultraviolet Signals

Ranging between military assets is particularly challenging in complex non-line-of-sight (NLOS) environments where adversaries may contest access to traditional localization technologies. Recent research shows that it is possible to use technology for Ultraviolet C-band (UV-C) communication for ranging as well. Based on the channel model for non-line-of-sight UV-C links, we formulate a calibration-free ranging approach that requires no prior knowledge of the orientations of the transmitter (Tx) and receiver (Rx). Detailed sensitivity analysis of the proposed NLOS ranging approach is performed through Monte Carlo simulations, taking into account key parameters including background and shot noise, photon sampling time, spacing between spatial samples, as well as steering angle errors. Based on this analysis, we present an approach for range estimation in complex GPS-denied NLOS scenarios that utilize UV-C links.