DocumentCode :
3607361
Title :
Improved Markov models for terrestrial free-space optical links
Author :
Zifeng Wu ; Giggenbach, Dirk ; Lankl, Berthold
Author_Institution :
Inst. for Commun. Eng., Univ. of the Fed. Armed Forces Munich, Neubiberg, Germany
Volume :
9
Issue :
5
fYear :
2015
Firstpage :
218
Lastpage :
222
Abstract :
Finite-state Markov chains are a useful tool for modelling communication channels with correlated fading and have recently also been applied with success to terrestrial free-space optical communication channels. However, the issue of how such Markov models should be optimised in order to accurately approximate the original continuous fading channel has not been addressed in a systematic manner. In this study, the authors improve on previous proposals by optimising the state space partitioning of the considered models. In particular, they investigate the properties and approximation accuracy of Markov models which are optimised according to information-theoretic considerations. They validate and evaluate their approach using a set of experimental measurements over a 12 km link distance. The obtained results confirm that optimised Markov models can provide better accuracy at lower state complexity, yet there remain shortcomings in capturing the autocovariance of the fading process.
Keywords :
Markov processes; optical links; autocovariance; fading process; finite-state Markov chains; improved Markov models; information-theoretic considerations; lower state complexity; state space partitioning; terrestrial free-space optical links;
fLanguage :
English
Journal_Title :
Optoelectronics, IET
Publisher :
iet
ISSN :
1751-8768
Type :
jour
DOI :
10.1049/iet-opt.2014.0117
Filename :
7284797
Link To Document :
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