Modelling and analysis of FSO ground-to-train communications for straight and curved tracks

Paudel, Rupak, Poliak, Juraj, Ghassemlooy, Zabih and Leitgeb, Erich (2013) Modelling and analysis of FSO ground-to-train communications for straight and curved tracks. In: 7th European Conference on Antennas and Propagation (EUCAP 2013), 8-12 April 2013, Gothenburg, Sweden.

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In this work, a free space optical (FSO) link for the ground-to-train communications is proposed. Analytical analysis is carried out for the case of the straight as well as curved rail tracks. We show that the transmitter divergence angle, the transmit power and the size of the concentration lens needs to increase for the curved section of the rail track compared to the straight track. We derive the analytical expression (11) for the received power level based on the link geometry for the cases of straight and curved tracks. The received power variation is compared for two cases showing a similar dynamic range. In the worst case scenario when the radius of curvature is 120 m, the transmit power at the optical base station (OBS) needs to increase by over 2 dB when the concentration lens radius is increased by 5 times. Analyses also show that received power increases with the radius of curvature. Finally, results are compared with the existing straight track model.

Item Type: Conference or Workshop Item (Paper)
Subjects: H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
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Depositing User: Sarah Howells
Date Deposited: 10 May 2013 15:33
Last Modified: 17 Dec 2023 14:54

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