Geolocation for UWB Networks in underground mines

Ultra wideband technology is regarded by many as one of the future key technologies in communications and positioning. Even though the basic principles of UWB have been studied for decades, there is still a great demand for research, especially in the field of precise local positioning. Techniques have to be further developed to cope with for example varying line of sight (LOS)/non line of sight (NLOS) or severe multipath conditions. In this paper we give an experimental measurement and modeling of ultra wideband radio propagation in underground mines for indoor geolocation. This work has been carried out by the underground communications research laboratory LRCS and the experimental mine CANMET (Canadian Center for Minerals and Energy Technology) in Val-d´Or, Canada.