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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editors: K. Bergman and O. Gerstel
  • Vol. 5, Iss. 9 — Sep. 1, 2013
  • pp: 1032–1042

Capacity Analysis of Dual Amplify-and-Forward Relayed Free-Space Optical Communication Systems Over Turbulence Channels With Pointing Errors

Kostas P. Peppas, Argyris N. Stassinakis, Hector E. Nistazakis, and George S. Tombras  »View Author Affiliations


Journal of Optical Communications and Networking, Vol. 5, Issue 9, pp. 1032-1042 (2013)
http://dx.doi.org/10.1364/JOCN.5.001032


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Abstract

This paper elaborates on the end-to-end capacity of dual-hop free-space optical (FSO) communication systems employing amplify-and-forward (AF) relaying, assuming channel state information is only known at the receiving terminals. The relay is assumed to either possess perfect channel state information or have a fixed gain. The performance of the considered system is affected by the combined effects of atmospheric turbulence-induced fading, pointing errors (i.e., misalignment fading), and path loss. Atmospheric turbulence conditions are modeled using the gamma–gamma distribution. For the system under consideration, accurate analytical approximations as well as upper bounds to the ergodic capacity are derived. In addition, bound approximations in the high signal-to-noise ratio regime are deduced that provide valuable insights into the impact of model parameters on the capacity of AF FSO dual-hop relaying systems. Numerically evaluated and computer simulation results are further provided to demonstrate the validity of the proposed mathematical analysis.

© 2013 Optical Society of America

OCIS Codes
(000.3870) General : Mathematics
(000.5490) General : Probability theory, stochastic processes, and statistics
(010.7060) Atmospheric and oceanic optics : Turbulence
(060.2605) Fiber optics and optical communications : Free-space optical communication

ToC Category:
Research Papers

History
Original Manuscript: February 8, 2013
Revised Manuscript: May 30, 2013
Manuscript Accepted: June 28, 2013
Published: August 23, 2013

Citation
Kostas P. Peppas, Argyris N. Stassinakis, Hector E. Nistazakis, and George S. Tombras, "Capacity Analysis of Dual Amplify-and-Forward Relayed Free-Space Optical Communication Systems Over Turbulence Channels With Pointing Errors," J. Opt. Commun. Netw. 5, 1032-1042 (2013)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jocn-5-9-1032


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