Abstract
The Gamma-Gamma (ΓΓ) distribution is popularly accepted for modeling the received intensity fluctuations in the near-ground free-space optical (FSO) communication. We consider in this letter the case of dual space diversity FSO systems when the fading coefficients corresponding to the two sub-channels are correlated. In order to evaluate the receiver performance analytically, we propose to approximate the sum of correlated ΓΓ random variables by an α-μ distribution. We show that there is a good match between the performance obtained by simulated data based on the ΓΓ channel model and that obtained from analytical calculation based on the approximate α-μ model.
Original language | English |
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Pages (from-to) | 621-624 |
Journal | IEEE Wireless Communications Letters |
Volume | 1 |
Issue number | 6 |
DOIs | |
Publication status | Published - Dec 2012 |
Keywords
- α-μ distribution
- Gamma-gamma distribution
- correlated fading
- free-space optics (FSO)
- spatial diversity