Author
Lee, I. E., Ghassemlooy, Z., Ng, W. P., Khalighi, M. A., Uysal, Murat
Publication Date
2013
Publication Place
-
IEEE
Subject
Free-space optical (FSO) communications, Partially coherent beam (PCB), Atmospheric turbulence, Pointing errors, Average channel capacity
Type
Document
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
978-1-4673-5821-7
Record ID
71f5a54f-febf-4398-8c92-e922e10c10d6
Library Location
Electrical & Electronics Engineering
Date
2013
Notes
Due to copyright restrictions, the access to the full text of this article is only available via subscription.
Sample Text
In this paper, we investigate the joint effects of
beam width and the spatial coherence length in a partially coherent free-space optical (FSO) link from the information theory perspective, taking into account the combined influence of atmospheric turbulence and pointing errors. In addition, the effects of aperture-averaging on the average capacity of FSO links employing partially coherent beams (PCBs) are examined. Results show that PCBs are desirable in the weak-to-moderate turbulence regime, whereas highly coherent laser sources are preferred under strong fluctuations conditions; and there exist optimality in the optical beam parameters for different atmospheric channel conditions. Near-optimal average capacity
is best achieved through the introduction of a larger receiver aperture and the joint beam width and spatial coherence length optimization technique, which effectively mitigates the effects of scintillation and pointing errors.
DOI
10.1109/NOC-OCI.2013.6582900
