OSA's Digital Library

Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editors: K. Bergman and V. Chan
  • Vol. 2, Iss. 8 — Aug. 1, 2010
  • pp: 625–632

Subcarrier Intensity Modulated Free-Space Optical Communications in K-Distributed Turbulence Channels

Hossein Samimi and Paeiz Azmi  »View Author Affiliations


Journal of Optical Communications and Networking, Vol. 2, Issue 8, pp. 625-632 (2010)
http://dx.doi.org/10.1364/JOCN.2.000625


View Full Text Article

Acrobat PDF (368 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

In this paper, the bit error rate (BER) performance of a subcarrier intensity-modulated (SIM) free-space optical (FSO) communications system using binary phase shift keying (BPSK) is investigated over a K-distributed turbulence channel. First, the performance is analyzed employing a negative exponential turbulence model, and an exact closed-form expression is derived for the BER. Then, it is shown that the probability density function (PDF) of the K distribution can be approximated accurately by a finite sum of weighted negative exponential PDFs. Based on this interesting result and by using the closed-form expression, which is derived for the case of a negative exponential model, an approximate, closed-form expression for the BER of the BPSK-based SIM FSO over a K channel is derived. Moreover, to improve the BER performance, spatial diversity using selection combining (SC) is considered. It is shown that the PDF of the resulting channel irradiance corresponding to the SC diversity scheme over a K channel can be approximated accurately by a finite linear combination of negative exponential functions. The derived approximate PDF accurately estimates the PDF of the channel irradiance for arbitrary values of diversity order and is valid for a wide range of channel parameters. Then, an approximate, closed-form expression is derived for the average BER of the BPSK-based SIM FSO system employing the SC diversity technique over a K channel. Numerical results presented in this paper show that the derived approximate expressions are very accurate and can be used as efficient tools for performance analysis of the system.

© 2010 Optical Society of America

OCIS Codes
(060.4510) Fiber optics and optical communications : Optical communications
(060.2605) Fiber optics and optical communications : Free-space optical communication

ToC Category:
Research Papers

History
Original Manuscript: February 22, 2010
Revised Manuscript: June 21, 2010
Manuscript Accepted: June 21, 2010
Published: July 27, 2010

Citation
Hossein Samimi and Paeiz Azmi, "Subcarrier Intensity Modulated Free-Space Optical Communications in K-Distributed Turbulence Channels," J. Opt. Commun. Netw. 2, 625-632 (2010)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jocn-2-8-625


Sort:  Author  |  Year  |  Journal  |  Reset

References

  1. J. Li, J. Q. Liu, and D. P. Taylor, “Optical communication using subcarrier PSK intensity modulation through atmospheric turbulence channels,” IEEE Trans. Commun. , vol. 55, no. 8, pp. 1598–1606, Aug. 2007. [CrossRef]
  2. W. O. Popoola, Z. Ghassemlooy, J. I. H. Allen, E. Leitgeb, and S. Gao, “Free-space optical communication employing subcarrier modulation and spatial diversity in atmospheric turbulence channel,” IET Optoelectron. , vol. 2, no. 1, pp. 16–23, Feb. 2008. [CrossRef]
  3. W. O. Popoola, Z. Ghassemlooy, and V. Ahmadi, “Performance of sub-carrier modulated free-space optical communication link in negative exponential atmospheric turbulence environment,” Int. J. Auton. Adapt. Commun. Syst. , vol. 1, no. 3, pp. 342–355, 2008. [CrossRef]
  4. W. O. Popoola and Z. Ghassemlooy, “BPSK subcarrier modulated free-space optical communications in atmospheric turbulence,” J. Lightwave Technol. , vol. 27, no. 8, pp. 967–973, Apr. 2009. [CrossRef]
  5. H. Wu, H. Yan, and X. Li, “Performance analysis of bit error rate for free space optical communication with tip-tilt compensation based on gamma-gamma distribution,” Opt. Appl. , vol. 39, no. 3, pp. 533–545, 2009.
  6. R. Ramaswami and K. Sivarajan, Optical Networks: A Practical Perspective, 2nd ed. New York: Morgan Kaufmann, 2002.
  7. E. Jakeman and P. N. Pusey, “A model for non-Rayleigh sea echo,” IEEE Trans. Antennas Propag. , vol. 24, pp. 806–814, Nov. 1976. [CrossRef]
  8. E. J. Lee and V. W. S. Chan, “Optical communication over the clear turbulent atmospheric channel using diversity,” IEEE J. Sel. Areas Commun. , vol. 22, no. 9, pp. 1896–1906, Nov. 2004. [CrossRef]
  9. I. S. Gradshteyn and I. M. Ryzhik, Table of Integrals, Series, and Products, 6th ed. New York: Academic, 1965.
  10. A. García-Zambrana, “Error rate performance for STBC in free-space optical communications through strong atmospheric turbulence,” IEEE Commun. Lett. , vol. 11, no. 5, pp. 390–392, May 2007. [CrossRef]
  11. M. Abramowitz and I. A. Stegun, Handbook of Mathematical Functions With Formulas, Graphs, and Mathematical Tables, 9th ed. New York: Dover, 1972.
  12. B. Castillo-Vazquez, A. Garcia-Zambrana, and C. Castillo-Vazquez, “Closed-form BER expression for FSO links with transmit laser selection over exponential atmospheric turbulence channels,” Electron Lett. , vol. 45, no. 23, pp. 1185–1187, 2009. [CrossRef]
  13. J. M. Holtzman, “On using perturbation analysis to do sensitivity analysis: derivatives versus differences,” IEEE Trans. Autom. Control , vol. 37, no. 2, pp. 243–247, Feb. 1992. [CrossRef]
  14. J. N. Kapur and H. K. Kesavan, Entropy Optimization Principles With Applications. Academic: New York, 1992.
  15. H. A. David and H. N. Nagaraja, Order Statistics, 3rd ed.Wiley, 2003.

Cited By

Alert me when this paper is cited

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  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited