Novel adaptive transmission algorithms for free-space optical links
Type :
Article
Publication Status :
published
Access :
restrictedAccess
Abstract
Atmospheric turbulence is a major degrading factor in free-space optical (FSO) systems. Since turbulence-induced fading results in a very slowly-varying channel, reliable feedback is possible allowing the implementation of adaptive transmission in practical FSO systems. In this paper, we propose adaptive transmission algorithms in which transmit power and/or modulation size are varied according to the channel conditions. The design of adaptive algorithms is formulated as optimization problems of spectral efficiency and average power consumption at a targeted value of outage probability under peak power constraints. The proposed adaptive schemes bring significant improvements over their non-adaptive counterparts.
Source :
IEEE Transactions on Communications
Date :
2012-12
Volume :
60
Issue :
12
Publisher :
IEEE
URI
http://hdl.handle.net/10679/478http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6302116
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