Vol. 21 No. 3 (2018) Cover Image
Vol. 21 No. 3 (2018)

Published: September 30, 2018

Pages: 344-349

Articles

Performance Analysis of FSO under Turbulent Channel Using OSTBC

Lwaa Faisal Abdulameer 1 Hala Fadhil 2
1 Information and Communication Eng. Dep., University of Baghdad, Baghdad, IRAQ
2 Information and Communication Eng. Dep., Al-Nahrain University, Baghdad, IRAQ
History
  • Received: October 18, 2017
  • Revised: February 5, 2018
  • Accepted: April 30, 2018
  • Available Online: September 1, 2018
DOI

https://doi.org/10.29194/NJES.21030344

Abstract

Free Space Optics (FSO) plays a vital role in modern wireless communications due to its advantages over fiber optics and RF techniques where a transmission of huge bandwidth and access to remote places become possible._x000D_ The specific aim of this research is to analyze the Bit-Error Rate (BER) for FSO communication system when the signal is sent the over medium of turbulence channel, where the fading channel is described by the Gamma-Gamma model. The signal quality is improved by using Optical Space-Time Block- Code (OSTBC) and then the BER will be reduced. Optical 2×2 Alamouti scheme required 14 dB bit energy to noise ratio (Eb/N0) at 10-5 bit error rate (BER) which gives 3.5 dB gain as compared to no diversity scheme._x000D_ The results show that using Multiple-Input-Multiple-Output (MIMO) technique represented by Alamouti scheme gives the improved BER performance as compared with no diversity (Single-Input-Single-Output (SISO)) technique.

Keywords

References

  1. M. J. Lok1, I. E. Lee1, Z. Ghassemlooy2, and G. C. Chung1, " Investigation on the Error Performance of Modulation Formats in Freespace Optical Communication Links with Turbulences", 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP), 2016.
  2. G. Kaur1, H. Singh2, Amandeep Singh Sappal, " Free Space Optical Using Different Modulation Techniques – A Review",International Journal of Engineering Trends and Technology (IJETT) – Volume-43 Number-2, January 2017.
  3. T. Nara, N. Joshi, S. Ahuja, "Performance of Free-Space Optical MIMO system in SDistributed Turbulence". International Conference on Computing, Communication and Automation (ICCCA) 2016.
  4. M. Simon and V. Vilnrotter, “Alamouti-type space-time coding for freespace optical communication with direct detection,” IEEE Trans. Wireless Commun., vol. 4, no. 1, pp. 35– 39 2005.
  5. A. Garc´ıa-Zambrana and A. Puerta-Notario, “Novel approach for increasing the peak-toaverage optical power ratio in rate-adaptive optical wireless communications systems,” IEE Proc. Optoelectron., vol. 150, no. 5, pp. 439–444, 2003.
  6. A. Garc´ıa-Zambrana, " Error Rate Performance for STBC in Free-Space Optical Communications through Strong Atmospheric Turbulence", IEEE COMMUNICATIONS LETTERS, VOL. 11, NO. 5 MAY 2007.
  7. J. Abouei and K. N. Plataniotis, B., "Multiuser diversity scheduling in free-space optical communications, IEEE/OSA J.Lightw. Technol., vol. 30, no. 9, pp. 1351–1358 May 2012.
  8. L. Yang,X. Gao, Senior Member, IEEE, Mohamed-Slim Alouini, Fellow, IEEE, " Performance Analysis of Free-Space Optical Communication Systems With Multiuser Diversity Over Atmospheric Turbulence Channels" ,Volume 6, Number 2 April 2014.
  9. M .Shinozuka., A. Uchida, Ogawa T. Yoshmori S. and Kannari F., "Chaotic on-off keying method in microchip lasers for secure communications 2001.
  10. Y. Hiroshi and O. Tomoaki,, " Alamouti- Type Space-Time Coding for Free-Space Optical Communication with Direct Detection , 2003.
  11. L. Faisal., D. Jokhakar, U. Sripati and M. Kulkarni., “BER Performance Enhancement for Secure Wireless Optical Communication Systems Based on Chaotic MIMO Techniques”. Nonlinear Dynamics, (SPRINGER), Vol. 75, p.p. 7-16 January 2014.