Adaptive Inter-System Handover for Heterogeneous RF and IR Networks
IPDPS '05 Proceedings of the 19th IEEE International Parallel and Distributed Processing Symposium (IPDPS'05) - Workshop 1 - Volume 02
Service-outage-based power and rate control for poisson fading channels
IEEE Transactions on Information Theory
Channel capacity and non-uniform signalling for free-space optical intensity channels
IEEE Journal on Selected Areas in Communications - Special issue on optical 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
Behavior of hybrid optical/RF channels over varying link distances
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Hybrid channel codes for efficient FSO/RF communication systems
IEEE Transactions on Communications
On the capacity of FSO links over gamma-gamma atmospheric turbulence channels using OOK signaling
EURASIP Journal on Wireless Communications and Networking
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We consider the ergodic capacity and capacity-versus-outage probability of direct-detection optical communication through a turbulent atmosphere using multiple transmit and receive apertures. We assume shot-noise-limited operation in which detector outputs are doubly stochastic Poisson processes whose rates are proportional to the sum of the transmitted powers, scaled by lognormal random fades, plus a background noise. In the high and low signal-to-background ratio regimes, we show that the ergodic capacity of this fading channel equals or exceeds that for a channel with deterministic path gains. Furthermore, knowledge of these path gains is not necessary to achieve capacity when the signal-to-background ratio is high. In the low signal-to-background ratio regime, path-gain knowledge provides minimal capacity improvement when using a moderate number of transmit apertures. We also develop expressions for the capacity-versus-outage probability in the high and low signal-to-background ratio regimes, by means of a moment-matching approximation to the distribution for the sum of lognormal random variables. Monte Carlo simulations show that these capacity-versus-outage approximations are quite accurate for moderate numbers of apertures.