Abstract

The effects of pointing errors on the performance of a free-space optical laser communication system are studied. The log-normal and gamma-gamma irradiance probability density function models have been considered to include the effects of optical turbulence. An expression for the mean intensity under pointing fluctuations is derived. Results for ergodic and outage channel capacities are presented. Since the irradiance statistics vary with pointing fluctuations, a wave-optics-based approach is proposed to evaluate the capacity expressions. Although, in general, turbulence degrades communications link performance, it can reduce sensitivity to pointing errors by increasing the effective beam radius. Finally, we present analytical expressions for evaluating the bit-error-rate performance of the ${on}$–${off}$ keying system in the presence of pointing errors, and provide error performance results.

© 2009 IEEE

PDF Article

References

  • View by:
  • |
  • |

  1. X. Zhu, J. M. Kahn, "Free-space optical communication through atmospheric turbulence channels," IEEE Trans. Commun. 50, 1293-1300 (2002).
  2. X. Zhu, J. M. Kahn, "Performance bounds for coded free-space optical communications through atmospheric turbulence channels," IEEE Trans. Commun. 51, 1233-1239 (2003).
  3. J. Li, M. Uysal, "Optical wireless communications: System model, capacity and oding," Proc. IEEE VTC Fall (2003) pp. 168-172.
  4. J. Anguita, I. Djordjevic, M. A. Neifeld, B. Vasic, "Shannon capacities and error-correction codes for the optical atmospheric channel," OSA J. Opt. Netw. 4, 586-601 (2005).
  5. D. K. Borah, D. G. Voelz, S. Basu, "Maximum-likelihood estimation of a laser system pointing parameters by use of return photon counts," Appl. Opt. 45, 2504-2509 (2006).
  6. S. Arnon, "Power versus stabilization for laser satellite communication," Appl. Opt. 38, 3229-3233 (1999).
  7. D. Kedar, S. Arnon, "Optical wireless communication through fog in the presence of pointing errors," Appl. Opt. 42, 4946-4954 (2003).
  8. V. V. Nikulin, R. Khandekar, "Performance of laser communication uplinks and downlinks in the presence of pointing errors and atmospheric distortions," Proc. SPIE 5712, 37-45 (2005).
  9. D. K. Borah, D. G. Voelz, "Estimation of laser beam pointing parameters in the presence of atmospheric turbulence," Appl. Opt. 46, 6010-6018 (2007).
  10. S. Arnon, "Effects of atmospheric turbulence and building sway on optical wireless-communication systems," Opt. Lett. 28, 129-131 (2003).
  11. H. G. Sandalidis, T. A. Tsiftsis, G. K. Karagiannidis, M. Uysal, "BER performance of FSO links over strong atmospheric turbulence channels with pointing errors," IEEE Commun. Lett. 12, 44-46 (2008).
  12. A. A. Farid, S. Hranilovic, "Outage capacity optimization for free-space optical links with pointing errors," J. Lightw. Technol. 25, 1702-1710 (2007).
  13. L. C. Andrews, R. L. Phillips, C. Y. Hopen, Laser Beam Scintillation With Applications (SPIE, 2001).
  14. I. S. Gradshteyn, I. M. Ryzhik, Table of Integrals, Series, and Products (Academic, 1994).
  15. J. H. Churnside, R. G. Frehlich, "Experimental evaluation of log-normal modulated Rician and IK models of optical scintillation in the atmosphere," J. Opt. Soc. Amer. A6, 1760-1766 (1989).
  16. C. C. Davis, I. I. Smolyaninov, "The effect of atmospheric turbulence on bit-error-rate in an on-off-keyed optical wireless system," Proc. SPIE 4489, 126-136 (2002).
  17. T. J. Richardson, M. A. Shokrollahi, R. L. Urbanke, "Design of capacity-approaching irregular low-density parity-check codes," IEEE Trans. Inf. Theory 47, 619-637 (2001).
  18. S.-Y. Chung, J. G. D. Forney, T. J. Richardson, R. L. Urbanke, "On the design of low-density parity-check codes within 0.0045 db of the Shannon limit," IEEE Commun. Lett. 5, 58-60 (2001).
  19. Adaptive Optics Toolbox http://www.mathworks.com/products/connections/product_main.shtml?prod_id=127 (n.d.)[Online] (2009).
  20. M. A. Al-Habash, L. C. Andrews, 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).
  21. T. Richardson, R. Urbanke, Modern Coding Theory (Cambridge Univ. Press, 2008).

2008 (1)

H. G. Sandalidis, T. A. Tsiftsis, G. K. Karagiannidis, M. Uysal, "BER performance of FSO links over strong atmospheric turbulence channels with pointing errors," IEEE Commun. Lett. 12, 44-46 (2008).

2007 (2)

A. A. Farid, S. Hranilovic, "Outage capacity optimization for free-space optical links with pointing errors," J. Lightw. Technol. 25, 1702-1710 (2007).

D. K. Borah, D. G. Voelz, "Estimation of laser beam pointing parameters in the presence of atmospheric turbulence," Appl. Opt. 46, 6010-6018 (2007).

2006 (1)

2005 (2)

J. Anguita, I. Djordjevic, M. A. Neifeld, B. Vasic, "Shannon capacities and error-correction codes for the optical atmospheric channel," OSA J. Opt. Netw. 4, 586-601 (2005).

V. V. Nikulin, R. Khandekar, "Performance of laser communication uplinks and downlinks in the presence of pointing errors and atmospheric distortions," Proc. SPIE 5712, 37-45 (2005).

2003 (3)

2002 (2)

X. Zhu, J. M. Kahn, "Free-space optical communication through atmospheric turbulence channels," IEEE Trans. Commun. 50, 1293-1300 (2002).

C. C. Davis, I. I. Smolyaninov, "The effect of atmospheric turbulence on bit-error-rate in an on-off-keyed optical wireless system," Proc. SPIE 4489, 126-136 (2002).

2001 (3)

T. J. Richardson, M. A. Shokrollahi, R. L. Urbanke, "Design of capacity-approaching irregular low-density parity-check codes," IEEE Trans. Inf. Theory 47, 619-637 (2001).

S.-Y. Chung, J. G. D. Forney, T. J. Richardson, R. L. Urbanke, "On the design of low-density parity-check codes within 0.0045 db of the Shannon limit," IEEE Commun. Lett. 5, 58-60 (2001).

M. A. Al-Habash, L. C. Andrews, 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).

1999 (1)

1989 (1)

J. H. Churnside, R. G. Frehlich, "Experimental evaluation of log-normal modulated Rician and IK models of optical scintillation in the atmosphere," J. Opt. Soc. Amer. A6, 1760-1766 (1989).

Appl. Opt. (4)

IEEE Commun. Lett. (2)

H. G. Sandalidis, T. A. Tsiftsis, G. K. Karagiannidis, M. Uysal, "BER performance of FSO links over strong atmospheric turbulence channels with pointing errors," IEEE Commun. Lett. 12, 44-46 (2008).

S.-Y. Chung, J. G. D. Forney, T. J. Richardson, R. L. Urbanke, "On the design of low-density parity-check codes within 0.0045 db of the Shannon limit," IEEE Commun. Lett. 5, 58-60 (2001).

IEEE Trans. Commun. (2)

X. Zhu, J. M. Kahn, "Free-space optical communication through atmospheric turbulence channels," IEEE Trans. Commun. 50, 1293-1300 (2002).

X. Zhu, J. M. Kahn, "Performance bounds for coded free-space optical communications through atmospheric turbulence channels," IEEE Trans. Commun. 51, 1233-1239 (2003).

IEEE Trans. Inf. Theory (1)

T. J. Richardson, M. A. Shokrollahi, R. L. Urbanke, "Design of capacity-approaching irregular low-density parity-check codes," IEEE Trans. Inf. Theory 47, 619-637 (2001).

J. Lightw. Technol. (1)

A. A. Farid, S. Hranilovic, "Outage capacity optimization for free-space optical links with pointing errors," J. Lightw. Technol. 25, 1702-1710 (2007).

J. Opt. Soc. Amer. (1)

J. H. Churnside, R. G. Frehlich, "Experimental evaluation of log-normal modulated Rician and IK models of optical scintillation in the atmosphere," J. Opt. Soc. Amer. A6, 1760-1766 (1989).

Opt. Eng. (1)

M. A. Al-Habash, L. C. Andrews, 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).

Opt. Lett. (1)

OSA J. Opt. Netw. (1)

J. Anguita, I. Djordjevic, M. A. Neifeld, B. Vasic, "Shannon capacities and error-correction codes for the optical atmospheric channel," OSA J. Opt. Netw. 4, 586-601 (2005).

Proc. SPIE (2)

C. C. Davis, I. I. Smolyaninov, "The effect of atmospheric turbulence on bit-error-rate in an on-off-keyed optical wireless system," Proc. SPIE 4489, 126-136 (2002).

V. V. Nikulin, R. Khandekar, "Performance of laser communication uplinks and downlinks in the presence of pointing errors and atmospheric distortions," Proc. SPIE 5712, 37-45 (2005).

Other (5)

J. Li, M. Uysal, "Optical wireless communications: System model, capacity and oding," Proc. IEEE VTC Fall (2003) pp. 168-172.

L. C. Andrews, R. L. Phillips, C. Y. Hopen, Laser Beam Scintillation With Applications (SPIE, 2001).

I. S. Gradshteyn, I. M. Ryzhik, Table of Integrals, Series, and Products (Academic, 1994).

T. Richardson, R. Urbanke, Modern Coding Theory (Cambridge Univ. Press, 2008).

Adaptive Optics Toolbox http://www.mathworks.com/products/connections/product_main.shtml?prod_id=127 (n.d.)[Online] (2009).

Cited By

OSA participates in Crossref's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.