Free-space optical communication using subcarrier modulation in Gamma-Gamma atmospheric turbulence

Ghassemlooy, Zabih, Popoola, Wasiu Oyewole and Leitgeb, Erich (2007) Free-space optical communication using subcarrier modulation in Gamma-Gamma atmospheric turbulence. In: ICTON 2007. IEEE, Piscataway, NJ, pp. 156-160. ISBN 1-4244-1249-8

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Abstract

Free-space optical communications (FSO) propagated over a clear atmosphere suffers from irradiance fluctuation caused by small but random atmospheric temperature fluctuations. This results in decreased signal-to-noise ratio and consequently impaired error performance. In this paper, the error performance of the FSO using a subcarrier intensity modulation (SIM) based on a binary phase shift keying scheme in clear but turbulent atmosphere is presented. To evaluate the system error performance in turbulence regimes from weak to strong, the probability density function of the received irradiance after traversing the atmosphere is modelled using the gamma-gamma distribution and the effect of turbulence induced irradiance fluctuation is mitigated using spatial diversity.

Item Type: Book Section
Subjects: H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Becky Skoyles
Date Deposited: 30 Apr 2014 12:13
Last Modified: 24 Oct 2017 08:54
URI: http://nrl.northumbria.ac.uk/id/eprint/16221

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