Author
Chatzidiamantis, N. D., Karagiannidis, G. K., Uysal, Murat
Publication Date
2010-12
Publication Place
-
IEEE
Subject
Free-space optical systems, Turbulence-induced fading, Poisson photon counting model, Maximum likelihood sequence detection, Generalized maximum likelihood sequence detection
Type
Periodical
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
0090-6778
Record ID
da09a1df-534e-441f-8875-ed4aed4027a4
Library Location
Electrical & Electronics Engineering
Date
2010-12
Notes
Due to copyright restrictions, the access to the full text of this article is only available via subscription.
Sample Text
We investigate detection methods for on-off keying (OOK) photon-counting Free Space Optical (FSO) systems in the presence of turbulence-induced fading, assuming no channel state information at the receiver. To recover the performance loss which is associated with symbol-by-symbol detection in such a scenario, we consider sequence detection techniques, exploiting the temporal correlation of the FSO channel. Due to its high complexity in the calculation of its metric, optimal maximum likelihood sequence detection (MLSD) is infeasible for most practical purposes. Hence, we propose a suboptimal low-complexity detection rule, which is based on the generalized maximum-likelihood sequence estimation. The proposed scheme allows the detection of sequence lengths that are prohibitive for conventional MLSD, without using any kind of channel knowledge. Monte Carlo simulation results show its performance to be very close to the optimum for large sequence lengths and various fading models.
DOI
10.1109/TCOMM.2010.093010.090116A
Cilt
58
