Detail publikačního výsledku

Curved Track Analysis of FSO Link for Ground-to-Train Communications

PAUDEL, R.; POLIAK, J.; GHASSEMLOOY, Z.; WILFERT, O.; LEITGEB, E.

Original Title

Curved Track Analysis of FSO Link for Ground-to-Train Communications

English Title

Curved Track Analysis of FSO Link for Ground-to-Train Communications

Type

WoS Article

Original Abstract

In this work, a free space optical (FSO) link for the ground-to-train (G2T-FSO) communications is proposed. Analytical analysis is carried out for the curved rail tracks. We show that the transmitter divergence angle, the transmit power and the size of the concentration lens need to increase for the curved section of the rail track compared to the straight track. We derive the analytical expression for the received power level based on the link geometry for the case of the curved track In the worst case scenario when the curvature radius is 120 m, the transmit power at the optical 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 along the track increases with the curvature radius for the same transmit power and receiver optics illustrating the effect due to link geometry. Additionally, the signal-to-noise ratio (SNR) and the bit error rate (BER) performance of the system for the curved track with different curvature radii is analysed at data rates of 10 Mbps and 100 Mbps for an additive white Gaussian noise (AWGN) channel showing a good agreement between the theoretical and the simulated BER. Finally, effect of scintillations on the G2T-FSO link performance is discussed.

English abstract

In this work, a free space optical (FSO) link for the ground-to-train (G2T-FSO) communications is proposed. Analytical analysis is carried out for the curved rail tracks. We show that the transmitter divergence angle, the transmit power and the size of the concentration lens need to increase for the curved section of the rail track compared to the straight track. We derive the analytical expression for the received power level based on the link geometry for the case of the curved track In the worst case scenario when the curvature radius is 120 m, the transmit power at the optical 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 along the track increases with the curvature radius for the same transmit power and receiver optics illustrating the effect due to link geometry. Additionally, the signal-to-noise ratio (SNR) and the bit error rate (BER) performance of the system for the curved track with different curvature radii is analysed at data rates of 10 Mbps and 100 Mbps for an additive white Gaussian noise (AWGN) channel showing a good agreement between the theoretical and the simulated BER. Finally, effect of scintillations on the G2T-FSO link performance is discussed.

Keywords

Free space optical; ground-to-train; base station; link geometry

Key words in English

Free space optical; ground-to-train; base station; link geometry

Authors

PAUDEL, R.; POLIAK, J.; GHASSEMLOOY, Z.; WILFERT, O.; LEITGEB, E.

RIV year

2017

Released

11.04.2014

Publisher

Spolecnost pro radioelektronicke inzenyrstvi

Location

Praha

ISBN

1210-2512

Periodical

Radioengineering

Volume

23

Number

1

State

Czech Republic

Pages from

452

Pages to

459

Pages count

8

Full text in the Digital Library

http://hdl.handle.net/

BibTex

@article{BUT107043,
  author="Rupak {Paudel} and Juraj {Poliak} and Zabih {Ghassemlooy} and Otakar {Wilfert} and Erich {Leitgeb}",
  title="Curved Track Analysis of FSO Link for Ground-to-Train Communications",
  journal="Radioengineering",
  year="2014",
  volume="23",
  number="1",
  pages="452--459",
  issn="1210-2512"
}