Title :
In-tunnel transmission characteristics of VICS radio beacon
Author :
Honda, Koki ; Ikeda, J. ; Tachikawa, Klkuo
Author_Institution :
Metropolitan Expressway Public Corp., Tokyo, Japan
fDate :
31 Aug-2 Sep 1994
Abstract :
The Radio Beacon System provides digital radio transmissions as part of the Vehicle Information and Communication System (VICS). Operating in the quasi-microwave (2.5 GHz) band at transmission speeds of 64 kbps, the system enables moving vehicles to be provided with roadway-traffic and location information. According to available reports on tests of this system, a service area of 70 m or more can be secured along open roadways where road station antennas are installed. Since the Metropolitan Expressway Public Corporation plans to construct a number of tunnels in the future, any practical Radio Beacon System will require that road stations also be located in tunnels. To confirm the possibility of communication in tunnels, the authors conducted an in-tunnel-evaluation test of the system to clarify in-tunnel transmission characteristics, which seem likely to be quite different from those on open roadways
Keywords :
digital radio; driver information systems; radio applications; 2.5 GHz; Metropolitan Expressway Public Corporation; Radio Beacon System; VICS radio beacon; Vehicle Information and Communication System; digital radio transmissions; in-tunnel transmission characteristics; location information; quasi-microwave band; roadway-traffic information; Antenna measurements; Bit error rate; Fading; Receiving antennas; Reflection; Road vehicles; System testing; Time measurement; Vehicle detection; Velocity measurement;
Conference_Titel :
Vehicle Navigation and Information Systems Conference, 1994. Proceedings., 1994
Conference_Location :
Yokohama
Print_ISBN :
0-7803-2105-7
DOI :
10.1109/VNIS.1994.396856
