OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 24 — Aug. 20, 2011
  • pp: 4737–4745

Multiple transmitter performance with appropriate amplitude modulation for free-space optical communication

Jason A. Tellez and Jason D. Schmidt  »View Author Affiliations


Applied Optics, Vol. 50, Issue 24, pp. 4737-4745 (2011)
http://dx.doi.org/10.1364/AO.50.004737


View Full Text Article

Enhanced HTML    Acrobat PDF (833 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

The propagation of a free-space optical communications signal through atmospheric turbulence experiences random fluctuations in intensity, including signal fades, which negatively impact the performance of the communications link. The gamma–gamma probability density function is commonly used to model the scintillation of a single beam. One proposed method to reduce the occurrence of scintillation-induced fades at the receiver plane involves the use of multiple beams propagating through independent paths, resulting in a sum of independent gamma–gamma random variables. Recently an analytical model for the probability distribution of irradiance from the sum of multiple independent beams was developed. Because truly independent beams are practically impossible to create, we present here a more general but approximate model for the distribution of beams traveling through partially correlated paths. This model compares favorably with wave-optics simulations and highlights the reduced scintillation as the number of transmitted beams is increased. Additionally, a pulse-position modulation scheme is used to reduce the impact of signal fades when they occur. Analytical and simulated results showed significantly improved performance when compared to fixed threshold on/off keying.

OCIS Codes
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence
(290.5930) Scattering : Scintillation
(060.2605) Fiber optics and optical communications : Free-space optical communication

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: June 6, 2011
Manuscript Accepted: July 1, 2011
Published: August 11, 2011

Citation
Jason A. Tellez and Jason D. Schmidt, "Multiple transmitter performance with appropriate amplitude modulation for free-space optical communication," Appl. Opt. 50, 4737-4745 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-24-4737


Sort:  Author  |  Year  |  Journal  |  Reset  

References

  1. J. A. Louthain and J. D. Schmidt, “Anisoplanatism in airborne laser communication,” Opt. Express 16, 10769–10785 (2008). [CrossRef] [PubMed]
  2. J. A. Louthain and J. D. Schmidt, “Synergy of adaptive thresholds and multiple transmitters in free-space optical communication,” Opt. Express 18, 8948–8962 (2010). [CrossRef] [PubMed]
  3. J. A. Louthain and J. D. Schmidt, “Anisoplanatic approach to airborne laser communication,” presented at the 2007 MSS Active E-O Systems, Atlanta, Georgia, USA 24–27 Sept. 2007.
  4. J. Ma, Y. Jiang, S. Yu, L. Tan, and W. Du, “Packet error rate analysis of OOK, DPIM and PPM modulation schemes for ground-to-satellite optical communications,” Opt. Commun. 283, 237–242 (2010). [CrossRef]
  5. J. A. Tellez and J. D. Schmidt, “Multibeam scintillation cumulative distribution function,” Opt. Lett. 36, 286–288(2011). [CrossRef] [PubMed]
  6. M. A. Al-Habash, L. C. Andrews, and R. L. Phillips, “Mathematical model for the irradiance probability density function of a laser beam propagating through turbulent media,” Opt. Eng. 40, 1554–1562 (2001). [CrossRef]
  7. L. C. Andrews, R. L. Phillips, and C. Y. Hopen, Laser Beam Scintillation with Applications (SPIE, 2001). [CrossRef]
  8. L. C. Andrews and R. L. Phillips, Laser Beam Propagation through Random Media, 2nd ed. (SPIE, 2005). [CrossRef]
  9. N. D. Chatzidiamantis, G. K. Karagiannidis, and D. S. Michalopoulos, “On the distribution of the sum of gamma–gamma variates and application in MIMO optical wireless systems,” in Proceedings of IEEE Global Telecommunications Conference (IEEE, 2009), pp. 1–6.
  10. J. D. Schmidt, Numerical Simulation of Optical Wave Propagation With Examples in MATLAB (SPIE, 2010).
  11. S. Coy, “Choosing mesh spacings and mesh dimensions for wave optics simulation,” Proc. SPIE 5894, 589405 (2005). [CrossRef]
  12. M. C. Roggemann and B. Welsh, Imaging through Turbulence (CRC Press, 1996).
  13. J. A. Louthain, “Atmospheric turbulence scintillation effects of wavefront tilt estimation,” Master’s thesis (Air Force Institute of Technology, 1997).
  14. D. L. Fried, “Anisoplanatism in adaptive optics,” J. Opt. Soc. Am. 72, 52–52 (1982). [CrossRef]
  15. J. A. Tellez and J. D. Schmidt, “Multi-beam transmitter geometries for free-space optical communications,” Proc. SPIE 7588, 758803 (2010). [CrossRef]
  16. N. Tahir, N. M. Saad, B. B. Samir, V. K. Jain, and S. A. Aljunid, “Binary pulse position modulation simulation system in free space optical communication systems,” in Proceedings of IEEE International Conference on Intelligent and Advanced Systems (IEEE, 2010), pp. 1–4.
  17. H. R. Burris, A. E. Reed, N. M. Namazi, M. J. Vilcheck, and M. Ferraro, “Use of Kalman filtering in data detection in optical communication systems with multiplicative noise,” in Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (IEEE, 2001), pp. 2685–2688.

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