Modelling of free space optical link for ground-to-train communications using a Gaussian source

The demand for access to broadband data services in high-speed trains is increasing as more people are travelling to and from work, which is not met by the existing radio frequency technology. Therefore an alternative technology known as free space optics (FSO) could be readily adopted that could ov...

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Bibliographic Details
Published in:IET optoelectronics 2013-02, Vol.7 (1), p.1-8
Main Authors: Paudel, Rupak, Ghassemlooy, Zabih, Le-Minh, Hoa, Rajbhandari, Sujan
Format: Article
Language:English
Subjects:
Alternative technology
BER
bit error rate
Broadband
Budgeting
Communication systems
Computer simulation
Demand
error statistics
free space optical link
FSO
Gaussian distribution
Gaussian source
ground‐to‐train communications
Links
Mathematical models
optical links
signal‐to‐noise ratio
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Summary:The demand for access to broadband data services in high-speed trains is increasing as more people are travelling to and from work, which is not met by the existing radio frequency technology. Therefore an alternative technology known as free space optics (FSO) could be readily adopted that could overcome the bandwidth bottleneck problem. The study presents a mathematical model of an FSO link for ground-to-train communications link and analyses the system performance in terms of the signal-to-noise ratio and the bit error rate (BER). The authors show that the simulated BER is in good agreement with the predicted results for bit rates up to 50 Mbps. The link budget analysis for the proposed system is also presented showing a link margin of 17.75 dB.
ISSN:1751-8768
1751-8776
1751-8776
DOI:10.1049/iet-opt.2012.0047