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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 29, Iss. 7 — Apr. 1, 2011
  • pp: 1058–1065

Cooperative FSO Systems: Performance Analysis and Optimal Power Allocation

Chadi Abou-Rjeily and Serj Haddad

Journal of Lightwave Technology, Vol. 29, Issue 7, pp. 1058-1065 (2011)


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Abstract

In this paper, we investigate the cooperative diversity technique as a candidate solution for combating turbulence-induced fading over free-space optical (FSO) links. In particular, we propose a novel cooperation strategy that is suitable for quantum-limited FSO systems with any number of relays and we derive closed-form expressions for the error performance of this strategy. In scenarios where the channel-state-information (CSI) is available at the different nodes, we propose an optimal power allocation strategy that satisfies the Karush-Kuhn-Tucker (KKT) conditions and that further boosts the performance of FSO networks. It turned out that this closed-form optimal solution corresponds to transmitting the entire optical power along the “strongest link” between the source and the destination nodes. A simple procedure is proposed for selecting this link and for distributing the power among its different hops.

© 2011 IEEE

Citation
Chadi Abou-Rjeily and Serj Haddad, "Cooperative FSO Systems: Performance Analysis and Optimal Power Allocation," J. Lightwave Technol. 29, 1058-1065 (2011)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-29-7-1058

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