FSO Communications

asynchronous free-space optical CDMA communications system for last-mile access networks
We propose a new hybrid asynchronous OCDMA-FSO communications system for access network solutions. New average BER expressions are …
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Rate-adaptive selective relaying using time diversity for relay-assisted FSO communications
In this paper, a novel cooperative protocol for free-space optical (FSO) communication systems is proposed, wherein the performance …
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850-nm hybrid fiber/free-space optical communications using orbital angular momentum modes
Light beams can carry orbital angular momentum (OAM) associated to the helicity of their phasefronts. These OAM modes can be employed …
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Ergodic capacity analysis for DF strategies in cooperative FSO systems
This paper focuses on the ergodic capacity analysis in the context of cooperative free-space optical (FSO) systems when the line of …
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Impact of relay placement on diversity order in adaptive selective DF relay-assisted FSO communications
The impact of relay placement on diversity order in adaptive selective decode-and-forward (DF) cooperative strategies is here …
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Physical-layer security in free-space optical communications
The communication between two legitimate peers in the presence of an external eavesdropper is studied from a physical-layer security …
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Transmit alternate laser selection with time diversity for FSO communications
In this paper, a new transmit alternate laser selection (TALS) scheme for FSO communication systems using intensity modulation and …
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