Title :
Multiservice communications plants for long tunnels
Author :
Coraiola, Alessandro ; Brambilla, Giorgio
Author_Institution :
SIRTI S.p.A., Milano, Italy
Abstract :
The present paper describes telecommunication plants for tunnels, which can support multiple services in a wide frequency range of VHF and UHF bands. The illustrated systems have a structure employing such techniques as "grading" and signal optical transport, in order to reduce the number of line amplifiers per unit of tunnel length and the amplifier powers.
Keywords :
Communication cables; Communication system traffic; Frequency; Optical amplifiers; Optical fiber cables; Power amplifiers; Power supplies; Radiofrequency amplifiers; Repeaters; Semiconductor optical amplifiers;
Conference_Titel :
Vehicle Navigation and Information Systems Conference, 1991
DOI :
10.1109/VNIS.1991.205839
