OSA's Digital Library

Journal of Lightwave Technology

Journal of Lightwave Technology


  • 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)

View Full Text Article

Acrobat PDF (670 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

  • Export Citation/Save Click for help


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

Chadi Abou-Rjeily and Serj Haddad, "Cooperative FSO Systems: Performance Analysis and Optimal Power Allocation," J. Lightwave Technol. 29, 1058-1065 (2011)

Sort:  Year  |  Journal  |  Reset


  1. D. Kedar, S. Arnon, "Urban optical wireless communications networks: The main challenges and possible solutions," IEEE Commun. Mag. 42, 2-7 (2003).
  2. X. Zhu, J. Kahn, "Free-space optical communication through atmospheric turbulence channels," IEEE Trans. Commun. 50, 1293-1300 (2002).
  3. S. G. Wilson, M. Brandt-Pearce, Q. Cao, J. H. Leveque, "Free-space optical MIMO transmission with Q-ary PPM," IEEE Trans. Commun. 53, 1402-1412 (2005).
  4. A. Garcia-Zambrana, C. Castillo-Vazquez, B. Castillo-Vazquez, A. Hiniesta-Gomez, "Selection transmit diversity for FSO links over strong atmospheric turbulence channels," IEEE Photon. Technol. Lett. 21, 1017-1019 (2009).
  5. M. Safari, M. Uysal, "Do we really need OSTBCs for free-space optical communication with direct detection?," IEEE Trans. Wireless Commun. 7, 4445-4448 (2008).
  6. J. Laneman, D. Tse, G. Wornell, "Cooperative diversity in wireless networks: Efficient protocols and outage behavior," IEEE Trans. Inf. Theory 50, 3062-3080 (2004).
  7. M. Karimi, M. Nasiri-Kenari, "BER analysis of cooperative systems in free-space optical networks," J. Lightw Technol. 27, 5639-5647 (2009).
  8. C. Abou-Rjeily, A. Slim, "Cooperative diversity for free-space optical communications: Transceiver design and performance analysis," IEEE Trans. Commun. .
  9. S. Halme, B. Levitt, R. Orr, “Bounds and approximations for some integral expression involving lognormal statistics,” MIT Res. Lab. Electron. Quart. Prog. Rept. (1969).

Cited By

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article

OSA is a member of CrossRef.

CrossCheck Deposited