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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editors: K. Bergman and V. Chan
  • Vol. 3, Iss. 5 — May. 1, 2011
  • pp: 475–486

Performance Analysis of CDMA-Based Wireless Services Transmission Over a Turbulent RF-on-FSO Channel

Chedlia Ben Naila, Abdelmoula Bekkali, Kazuhiko Wakamori, and Mitsuji Matsumoto  »View Author Affiliations


Journal of Optical Communications and Networking, Vol. 3, Issue 5, pp. 475-486 (2011)
http://dx.doi.org/10.1364/JOCN.3.000475


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Abstract

This paper proposes a theoretical and experimental performance study to characterize the transmission of code-division-multiple-access-based wireless signals over a radio frequency on free-space optical (RF-FSO) system using an aperture averaging (AA) technique. First, we propose an analytical model including the carrier-to-noise-plus-interference ratio (CNIR) and outage probability expressions taking into consideration the use of the AA technique, the laser diode nonlinear distortion, and the multiple-access interference. Furthermore, we show that there is a design trade-off between an optimum optical modulation index in the transmitter side and the receiver aperture size to achieve a required average CNIR ensuring a substantial scintillation fade reduction. We thus provide preliminary criteria for optimizing both the transmitter and the receiver design of our RF-FSO system. Using an experimental RF-FSO system, we conduct investigations to characterize the deployment environment influencing the transmission of wideband code division multiple access (W-CDMA) signals over a 1 km free-space optical communication (FSO) link. Important performance metric parameters like the CNIR and adjacent channel leakage ratio are measured and analyzed to quantify the influence of atmospheric effects. We then validate the proposed mathematical model by performing a comparison with the experimental results obtained from the W-CDMA signal transmission over RF-FSO experiments. The presented work can be used as a baseline for the design and performance evaluation of FSO systems able to transmit different broadband wireless services signals.

© 2011 OSA

OCIS Codes
(060.4510) Fiber optics and optical communications : Optical communications
(060.2605) Fiber optics and optical communications : Free-space optical communication
(060.5625) Fiber optics and optical communications : Radio frequency photonics

ToC Category:
Research Papers

History
Original Manuscript: December 15, 2010
Revised Manuscript: April 12, 2011
Manuscript Accepted: April 13, 2011
Published: April 29, 2011

Citation
Chedlia Ben Naila, Abdelmoula Bekkali, Kazuhiko Wakamori, and Mitsuji Matsumoto, "Performance Analysis of CDMA-Based Wireless Services Transmission Over a Turbulent RF-on-FSO Channel," J. Opt. Commun. Netw. 3, 475-486 (2011)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jocn-3-5-475


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