Detail publikace

Modelling and Analysis of FSO Ground-to-Train Communications for Straight and Curved Tracks

Originální název

Modelling and Analysis of FSO Ground-to-Train Communications for Straight and Curved Tracks

Anglický název

Modelling and Analysis of FSO Ground-to-Train Communications for Straight and Curved Tracks

Jazyk

en

Originální abstrakt

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 track 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 along the rail tracks 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 base station (BS) needs to increase by over 2 dB when the concentration lens radius is increased by 5 times. Analyses also show that the received power increases with the radius of curvature. Finally, results are compared with the existing straight track model.

Anglický abstrakt

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 track 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 along the rail tracks 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 base station (BS) needs to increase by over 2 dB when the concentration lens radius is increased by 5 times. Analyses also show that the received power increases with the radius of curvature. Finally, results are compared with the existing straight track model.

Dokumenty

BibTex


@inproceedings{BUT99874,
  author="Rupak {Paudel} and Juraj {Poliak} and Zabih {Ghassemlooy} and Erich {Leitgeb}",
  title="Modelling and Analysis of FSO Ground-to-Train Communications for Straight and Curved Tracks",
  annote="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 track 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 along the rail tracks 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 base station (BS)
needs to increase by over 2 dB when the concentration lens radius
is increased by 5 times. Analyses also show that the received
power increases with the radius of curvature. Finally, results are
compared with the existing straight track model.",
  booktitle="Proceedings of the European Conference on Antennas and Propagation, EuCAP 2013",
  chapter="99874",
  howpublished="electronic, physical medium",
  year="2013",
  month="april",
  pages="1--5",
  type="conference paper"
}