Channel coding and time-diversity for optical wireless links

Atmospheric turbulence can cause a significant performance degradation in free space optical communication systems. An efficient solution could be to exploit the temporal diversity to improve the performance of the transmission link. Depending on the tolerable delay latency, we can benefit from some...

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Published in:Optics express 2009-01, Vol.17 (2), p.872-887
Main Authors: Xu, Fang, Khalighi, Ali, Caussé, Patrice, Bourennane, Salah
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Language:English
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Computer Science
Engineering Sciences
Information Retrieval
Signal and Image processing
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description Atmospheric turbulence can cause a significant performance degradation in free space optical communication systems. An efficient solution could be to exploit the temporal diversity to improve the performance of the transmission link. Depending on the tolerable delay latency, we can benefit from some degree of time diversity that we can exploit by employing channel coding and interleaving. In this paper, we investigate the efficiency of several channel coding techniques for different time diversity orders and turbulence conditions. We show that a simple convolutional code is a suitable choice in most cases as it makes a good compromise between decoding complexity and performance. We also study the receiver performance when the channel is estimated based on some training symbols.
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Signal and Image processing
title Channel coding and time-diversity for optical wireless links
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