Measuring UHF-RFID Tag Position via Unmanned Aerial Vehicle in Outdoor Scenario

This paper investigates the uncertainty associated to Synthetic Aperture Radar method for UHF-RFID tag positioning in open storage yard or container port. Phase measurements are acquired during the flight of an unmanned aerial vehicle (UAV) equipped with UHF-RFID reader and antenna in outdoor scenario. The method requires for the knowledge of the reader antenna trajectory which is achieved with a Global Navigation Satellite System on the UAV. The uncertainty associated to the UAV trajectory measurements and to the RFID measurements are investigated. Localization performance is demonstrated by an experimental analysis in real outdoor scenario.