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Effect of Atmospheric Turbulence on Free Space Optical Multi-carrier Code Division Multiple Access (MC-OCDMA)

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4 Author(s)
Bhuiyan, T.A. ; Dept. of Electr. & Electron. Eng., Bangladesh Univ. of Eng. & Technol., Dhaka, Bangladesh ; Choudhury, S.H. ; Al-Rasheed, A. ; Majumder, S.P.

In this paper, the effect of atmospheric turbulence on bit error probability in free-space multi-carrier optical CDMA (MC-OCDMA) scheme with Sequence Inverse Keyed(SIK) optical correlator receiver is analyzed. Here Intensity Modulation scheme is considered for transmission. The turbulence induced fading is described by the newly introduced gamma-gamma pdf[1] as a tractable mathematical model for atmospheric turbulence. Results are evaluated with Gold and Kasami code and it is shown that Gold sequence can be used for more efficient transmission than Kasami sequence in an atmospheric turbulence channel. Analysis also shows that, using two chips in each parallel path of MC-OCDMA transmitter rather than using single chip exhibits greater performance.

Published in:

Computer Modelling and Simulation (UKSim), 2010 12th International Conference on

Date of Conference:

24-26 March 2010

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