Ultrabroadband Wireless-Optical Transmission Links Using Axial Slot Leaky Feeders and Optical Fiber for Underground Transport Topologies

This paper describes a hybrid leaky feeder/fiber-optic transmission system for use in underground transportation networks. The system has a 1.6-Gb/s throughput and features an ultrawideband axial slot leaky feeder, which is based on a standard semirigid coaxial cable as a fixed antenna. Patch antenn...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology 2008-11, Vol.57 (6), p.3471-3476
Main Authors: Dudley, S.E.M., Quinlan, T.J., Walker, S.D.
Format: Article
Language:English
Subjects:
Applied sciences
Bandwidth
Circuit properties
Coaxial cables
Electric, optical and optoelectronic circuits
Electrical engineering. Electrical power engineering
Electrical power engineering
Electronics
Exact sciences and technology
Fiber optics
Integrated optics. Optical fibers and wave guides
lasers
leaky feeder
Miscellaneous
Network topology
Optical and optoelectronic circuits
Optical fiber cables
Optical fiber communications
Optical fibers
Optical telecommunications
patch antennas
Phase shift keying
Power networks and lines
Slot antennas
Telecommunications
Telecommunications and information theory
Throughput
Transportation
Ultra wideband technology
Underground and submarine networks
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Summary:This paper describes a hybrid leaky feeder/fiber-optic transmission system for use in underground transportation networks. The system has a 1.6-Gb/s throughput and features an ultrawideband axial slot leaky feeder, which is based on a standard semirigid coaxial cable as a fixed antenna. Patch antennas with a 4-GHz center frequency and a 1-GHz, -10-dB bandwidth are proposed for the rolling stock. This highest reported data rate was achieved by combining two 800-Mb/s in-phase and quadrature (I and Q) phase-shift keying (PSK) modulated data streams. A specially designed carrier and data synchronization system provided a convenient interface to a 1.3/1.5-mum diplex single-mode fiber-remoting network. The measured 2.4- to 6-GHz leaky feeder bandwidth allows multiradio multiband wireless mesh networking and, therefore, low-contention gigabit rolling stock data communications.
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2008.920055