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Automatic vehicle location Dallas test results
27th IEEE Vehicular Technology Conference, 1977The FCC allocation of a wide band channel at 900 MHz for an Automatic Vehicle Monitoring (AVM) service presented the opportunity to Hazeltine to develop a vehicle locating system that can support 5,000 vehicles with high location accuracy information and rapid two-way data message transmissions. The system is configured to have variable up-date rate of
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Automatic vehicle location in cellular communications systems
IEEE Transactions on Vehicular Technology, 1994The paper presents a method of automatic vehicle location (AVL). Signals are transmitted from base stations in a cellular communications system. A device is embedded into a cellular phone installed in a vehicle. When this vehicle is traveling through a cellular territory, the device receives those signals and calculates the attenuation of those signals
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Efficient Spectrum Utilization for Automatic Vehicle Location Systems
1971 IEEE International Electromagnetic Compatibility Symposium Record, 1971ALTERNATIVE SYSTEMS FOR VEHICLE LOCATION AND COMMUNICATIONS WITH REFERENCE TO BANDWIDTH REQUIREMENTS ON THE ELECTROMAGNETIC SPECTRUM ARE COMPARED WITH REFERENCE TO URBAN TRANSIT BUS OPERATIONS, POLICE CARS, FIRE FIGHTING EQUIPMENT, AND AMBULANCE SERVICES.
Walter C. Scales, John G. Barmby
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Automatic vehicle location (AVL) for transit operation
2000 10th Mediterranean Electrotechnical Conference. Information Technology and Electrotechnology for the Mediterranean Countries. Proceedings. MeleCon 2000 (Cat. No.00CH37099), 2005The purpose of the AVL system is to monitor the location of buses. Knowing the location of a bus enables the operator to manage the bus fleet more efficiently and to provide their customers with up to the minute information on bus arrivals and departures.
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An Automatic Vehicle Location System-Problems and Application
IFAC Proceedings Volumes, 1988Abstract An overview of the problems, which occur in the design and realization of the real time systems of automatic vehicle location, is presented.The possibility of using the locational and navigational principles for vehicle tracing in urban conditions is discussed.
D. Mladenov +5 more
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Performance assessment of automatic vehicle location (AVL) systems
Proceedings of Position, Location and Navigation Symposium - PLANS '96, 2002The Federal Transit Administration (FTA) considers computer aided dispatch and automatic vehicle location (CAD/AVL) systems to be an important element of their advanced public transportation systems (APTS) program. In 1992 the Denver Regional Transportation District contracted with the Westinghouse Company (now TMSI) to equip their fleet of over 800 ...
J.B. Pletta, D.L. Caskey, P.D. Heermann
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Multipath and ducting tolerant location techniques for automatic vehicle location systems
26th IEEE Vehicular Technology Conference, 1976This paper discusses various methods of improving the accuracy of a linear least squares solution algorithm which is commonly used in Time Difference of Arrival (TDOA), hyperbolic location systems. Topics considered include methods of generating a useful weighting matrix and a residue examination scheme as the basis for rejecting data contaminated by ...
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AVLN 2000 automatic vehicle location and navigation system
Conference Record of papers presented at the First Vehicle Navigation and Information Systems Conference (VNIS '89), 2003This prototype system is being tested at the University. The positioning component consists of a GPS Trimble TANS (Trimble Advanced Navigation System) receiver, a pair of Nu-Metrics odometers, and a map-matching module, all integrated by a seven-parameter state vector Kalman filter to yield continuous positioning of the vehicle.
C.B. Harris, E.J. Krakiwsky
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Electronic licence plate technology: automatic vehicle location and identification
Canadian Journal of Civil Engineering, 1988The purpose of this paper is to discuss the current level of technology in automatic vehicle identification (AVI). The technology is often referred to as electronic licence plate technology, due to the use of unique vehicle identity transponders (electronic licence plates) affixed to particular highway vehicles. Interrogator or roadside receiver units
A. T. Bergan +3 more
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DATATRAK automatic vehicle location and position reporting system
Conference Record of papers presented at the First Vehicle Navigation and Information Systems Conference (VNIS '89), 2003This system is designed specifically for land use, although equally efficient on boats and aircraft, particularly helicopters. Hyperbolic radio location is used with low-frequency transmitters spaced at 150 km intervals. Time division multiplexing permits up to 32 transmitters on one pair of frequencies. A one-way data system synchronized to navigation
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