Performance evaluation of FSO MIMO links in Gamma-Gamma fading with pointing errors

Bhatnagar, Manav and Ghassemlooy, Zabih (2015) Performance evaluation of FSO MIMO links in Gamma-Gamma fading with pointing errors. In: IEEE International Conference on Communications (ICC), 8-12 June 2015, London.

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In this paper, we study the equal gain combining (EGC) scheme in free space optical (FSO) multiple-input multiple-output (MIMO) communication systems over the Gamma-Gamma fading channel with pointing errors. The probability density function (PDF) of the Gamma-Gamma fading with pointing errors contains the Meijer-G function, which makes the error analysis of the considered system very difficult (almost undoable). We propose a new power series based representation for the PDF of the Gamma-Gamma fading with pointing errors. The average bit error rate (BER) for the EGC scheme is derived by using the proposed series based expression of the PDF. We also derive the asymptotic BER for the EGC scheme. The effect of pointing errors over the performance of the scheme is analyzed under different scenarios and it is observed that the pointing errors significantly degrade the diversity of the FSO MIMO system; but under strong atmospheric turbulence pointing errors can be neglected.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Bit error rate, EGC, Gamma-Gamma fading, MIMO system, free space optical links, subcarrier intensity modulation
Subjects: H600 Electronic and Electrical Engineering
P900 Others in Mass Communications and Documentation
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Becky Skoyles
Date Deposited: 15 Apr 2016 10:27
Last Modified: 12 Oct 2019 19:21

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