PT - JOURNAL ARTICLE AU - Tiberius, Christian AU - Janssen, Gerard AU - Koelemeij, Jeroen AU - Dierikx, Erik AU - Diouf,, Cherif AU - Dun, Han TI - Decimeter Positioning in an Urban Environment Through a Scalable Optical-Wireless Network AID - 10.33012/navi.589 DP - 2023 Sep 21 TA - NAVIGATION: Journal of the Institute of Navigation PG - navi.589 VI - 70 IP - 3 4099 - https://navi.ion.org/content/70/3/navi.589.short 4100 - https://navi.ion.org/content/70/3/navi.589.full SO - NAVIGATION2023 Sep 21; 70 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).