Time-Reversal UWB positioning beacon for railway application

This paper studies a new localization system for railway transport using Ultra Wideband (UWB) radio and Time Reversal (TR) techniques. UWB radio has the potential to offer good performance in terms of localization precision. Time Reversal channel pre-filtering facilitates signal detection and also helps increasing the received energy in a targeted area. In this paper, we study the characteristics of time reversal temporal and spatial focusing. We analyze the contribution of time reversal associated with UWB in terms of localization error. To perform this study, a deterministic channel model, consisting of several reflected paths combined with the direct path is modeled. In terms of localization error, the simulation results show that TR-UWB technique delivers improved performance over the UWB alone localization approach.