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Radio sur fibre : réseaux, couvertures radio, architectures et dimensionnements matériels

Abstract : In this thesis, we have studied a Radio-over-Fibre Distributed Antenna System for WLAN IEEE802.11g OFDM at 2.45 GHz. By analyzing the model and the characteristics of the optical link, we have studied the limitations of such system, and then proposed the technical solution. Because of the high noise figure and the low compression point of the optical link, the dynamic range of a Point to Point Radio-over-Fibre system could be very small, which does limit the performance of receiver (Access Point). Considering the received sensitivities defined by IEEE802.11g OFDM, the uplink could only respect the specification with the automatic gain control (AGC) loops. With simulation and measurement, we have proved that, using the automatic gain control units, the uplink performance of the access point can be improved. Then, we have analyzed the performance of the system including several distributed antennas. The uplink performance is still limited. For several architectures, we have studied the link budget and system dimensioning with different number of antennas. The diversity reception seemed necessary.
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https://tel.archives-ouvertes.fr/tel-00823575
Contributor : Bibliothèque Télécom Bretagne <>
Submitted on : Friday, May 17, 2013 - 1:30:34 PM
Last modification on : Friday, September 25, 2020 - 3:36:02 AM
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2013telb0258_Liu_Hexin.pdf
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  • HAL Id : tel-00823575, version 1

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Hexin Liu. Radio sur fibre : réseaux, couvertures radio, architectures et dimensionnements matériels. Sciences de l'ingénieur [physics]. Télécom Bretagne, Université de Bretagne Occidentale, 2013. Français. ⟨tel-00823575⟩

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