NDLI: Multihop Free-Space Optical Communications Over Turbulence Channels with Pointing Errors using Heterodyne Detection

Content Provider	IEEE Xplore Digital Library
Author	Xuan Tang Zhaocheng Wang Zhengyuan Xu Ghassemlooy, Z.
Copyright Year	1983
Abstract	This paper proposes and analyzes the performance of the multihop free-space optical (FSO) communication links using a heterodyne differential phase-shift keying modulation scheme operating over a turbulence induced fading channel. A novel statistical fading channel model for multihop FSO systems using channel-state-information-assisted and fixed-gain relays is developed incorporating the atmospheric turbulence, pointing errors, and path-loss effects. The closed-form expressions for the moment generating function, probability density function, and cumulative distribution function of the multihop FSO channel are derived using Meijer's G-function. They are then used to derive the fundamental limits of the outage probability and average symbol error rate. Results confirm the performance loss as a function of the number of hops. Effects of the turbulence strength varying from weak-to-moderate and moderate-to-strong turbulence, geometric loss, and pointing errors are studied. The pointing errors can be mitigated by widening the beam at the expense of the received power level, whereas narrowing the beam can reduce the geometric loss at the cost of increased misalignment effects.
Sponsorship	IEEE Lasers and Electro-Optics Society Optical Society of America
Starting Page	2597
Ending Page	2604
Page Count	8
File Size	489793
File Format	PDF
ISSN	07338724
Volume Number	32
Issue Number	15
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Relays Fading Atmospheric modeling Spread spectrum communication Optical transmitters Differential phase shift keying Receivers pointing errors Atmospheric turbulence (AT) average symbol error rate (ASER) heterodyne detection multihop free-space optical (FSO) outage probability (OP)
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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