Author
Karimi, Mehdi, Uysal, Murat
Publication Date
2012-12
Publication Place
-
IEEE
Subject
Free-space optical communications, Adaptive transmission, Fading channel, Pulse position modulation
Type
Periodical
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
0090-6778
Record ID
552fe6be-6c28-4c13-86e7-dfe205502b18
Library Location
Electrical & Electronics Engineering
Date
2012-12
Notes
Due to copyright restrictions, the access to the full text of this article is only available via subscription.
Sample Text
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.
DOI
10.1109/TCOMM.2012.091012.110550
Cilt
60
