RT Journal Article SR Electronic T1 Decimeter Positioning in an Urban Environment Through a Scalable Optical-Wireless Network JF NAVIGATION: Journal of the Institute of Navigation JO NAVIGATION FD Institute of Navigation SP navi.589 DO 10.33012/navi.589 VO 70 IS 3 A1 Tiberius, Christian A1 Janssen, Gerard A1 Koelemeij, Jeroen A1 Dierikx, Erik A1 Diouf,, Cherif A1 Dun, Han YR 2023 UL https://navi.ion.org/content/70/3/navi.589.abstract AB This paper presents a terrestrial networked positioning system that obtains a reliable time reference from a national time scale realization and distributes it in a prototype to six roadside base stations through a fiber-optic Gigabit Ethernet network. Wireless wideband signals are transmitted by the base stations, thereby enabling positioning by a mobile receiver with an accuracy of one decimeter in a multipath urban environment. The scalability and compatibility of this system with existing telecommunication-network technologies paves the way for wide-area global navigation satellite system-independent back-up systems for timing and positioning with improved coverage and performance. The results presented in this paper are based on research carried out within the scope of a project funded by the Dutch Research Council (NWO, project 13970).