Title :
FSO-MIMO behavior in variable atmospheric turbulence — An Asymptotic Approach
Author :
Frigyes, Istvan ; Csurgai-Horvath, Laszlo ; Horvath, Peter
Author_Institution :
Budapaest Univ. of Technol. & Econ., Budapest, Hungary
Abstract :
One of the effects of scintillation caused by atmospheric turbulence is the dependence of spatial correlation on the strength of turbulence itself. This has the effect that the apertures of a multielement array while fully uncorrelated in the case of deep fading become correlated as scintillation becomes milder. In such cases the diversity effect of the MIMO array may disappear. This phenomenon is investigated, maybe the first time. Based on correlation an effective number of apertures is defined. Outage probability vs. turbulence strength (this characterized by Fried parameter) is determined and formulas for average received SNR vs. turbulence strength are given. It is shown that in arrays of large number of apertures probability of outage is highest in the case of shallowest and not of deepest fading.
Keywords :
MIMO communication; atmospheric turbulence; fading channels; optical fibre communication; scintillation; FSO-MIMO behavior; Fried parameter; MIMO array; SNR; apertures probability; asymptotic approach; deep fading; free space optics; multielement array apertures; outage probability; scintillation; spatial correlation; turbulence strength; variable atmospheric turbulence; Apertures; Arrays; Coherence; Correlation; Fading; MIMO; Signal to noise ratio;
Conference_Titel :
Globecom Workshops (GC Wkshps), 2012 IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
978-1-4673-4942-0
Electronic_ISBN :
978-1-4673-4940-6
DOI :
10.1109/GLOCOMW.2012.6477750
