A system for determining the location of a moving vehicle with the aid of semipassive signpost reflectors deployed throughout an urban area is presented. The signpost reflectors allow a viable system to be configured since access to electric utility power is not required, thereby permitting a particularly simple and inexpensive installation. The interrogator, mounted at the vehicle, 'reads' the electronic signpost reflector to ascertain basic position information. This information is sent via the vehicle's two-way radio to a central location for control purposes. By using microwave energy at X-band for the interrogation signal, the antennas can utilize a beam shaping pattern although still being physically small. Appropriate antenna patterns can be used to define a very narrow (ribbon-like) reception area allowing very precise location information to be ascertained.
An X-band system using semipassive signpost reflectors for automatic location and tracking of vehicles
Ein X-Band-System unter Anwendung von halbpassiven Richtungsweiser-Reflektoren fuer automatische Ortung und Kursfuehrung von Fahrzeugen
IEEE Transactions on Vehicular Technology ; 26 , 1 ; 18-22
1977
5 Seiten, 13 Bilder, 1 Quelle
Aufsatz (Zeitschrift)
Englisch