Optical wireless links with spatial diversity over strong atmospheric turbulence channels
IEEE Transactions on Wireless Communications
Outage analysis of the hybrid free-space optical and radio-frequency channel
IEEE Journal on Selected Areas in Communications - Special issue on optical wireless communications
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
EM-based maximum-likelihood sequence detection for MIMO optical wireless systems
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Analog Integrated Circuits and Signal Processing
On space-time coding for free-space optical systems
IEEE Transactions on Communications
Generalized maximum-likelihood sequence detection for photon-counting free space optical systems
IEEE Transactions on Communications
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Free space optical (FSO) communications is a cost-effective and high bandwidth access technique, which has been receiving growing attention with recent commercialization successes. A major impairment in FSO links is the turbulence- induced fading which severely degrades the link performance. To mitigate turbulence-induced fading and, therefore, to improve the error rate performance, spatial diversity can be used over FSO links which involves the deployment of multiple laser transmitters/receivers. In this paper, we investigate the bit error rate (BER) performance of FSO links with spatial diversity over log- normal atmospheric turbulence fading channels, assuming both independent and correlated channels among transmitter/receiver apertures. Our analytical derivations build upon an approximation to the sum of correlated log-normal random variables. The derived BER expressions quantify the effect of spatial diversity and possible spatial correlations in a log-normal channel.