Optical wireless links with spatial diversity over strong atmospheric turbulence channels
IEEE Transactions on Wireless Communications
Service-outage-based power and rate control for poisson fading channels
IEEE Transactions on Information Theory
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
Performance analysis of MIMO free-space optical systems in Gamma-Gamma fading
IEEE Transactions on Communications
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
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
On space-time coding for free-space optical systems
IEEE Transactions on Communications
Hybrid channel codes for efficient FSO/RF communication systems
IEEE Transactions on Communications
Rateless coding for hybrid free-space optical and radio-frequency communication
IEEE Transactions on Wireless Communications
Generalized maximum-likelihood sequence detection for photon-counting free space optical systems
IEEE Transactions on Communications
ISRN Communications and Networking
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Optical communication over the clear atmosphere provides a means for high data rate communication (gigabits per second) over relatively short distances (kilometers). However, turbulence in the atmosphere leads to fades of varying depths, some of which may lead to heavy loss of data. We consider spatial diversity at both the transmitter and receiver, as well as time diversity as a means to mitigate the short-term loss of signal strength. Using direct detection receivers and binary pulse position modulation as an example, we derive the outage probability of spatial diversity and time diversity systems that use equal gain combining (EGC), optimal combining, and select-max combining. The power gain of using these diversity systems is found to be substantial, and the performance of equal gain combining is found to be almost as good as optimal combining. Hence, we feel diversity should be considered as one of the system techniques to improve channel performance in clear atmospheric optical channels.