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Closed-Form Expression for the Bit-Error Rate of Spectral-Amplitude-Coding Optical CDMA Systems

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1 Author(s)
Shalaby, H.M.H. ; Dept. of Electron. & Commun. Eng., Egypt-Japan Univ. of Sci. & Technol., Alexandria, Egypt

The spectral-amplitude-coding optical code-division multiple-access (SAC-OCDMA) technique is a vital candidate for future optical networks. Until now, there has been no exact analysis for the performance of systems using these techniques, and most researchers use upper and/or lower bounds to obtain the bit-error rate (BER) of these systems. In this letter, a more accurate analysis of the statistics, in terms of the mean and variance, of the decision current in SAC-OCDMA receivers is developed. These statistics are used to evaluate the BER of SAC-OCDMA techniques based on the Gaussian approximation method. Furthermore, the derived BER is evaluated numerically, for two different types of SAC-OCDMA codes, and is shown to fit properly between the upper and lower bounds of the BER.

Published in:

Photonics Technology Letters, IEEE  (Volume:24 ,  Issue: 15 )

Date of Publication:

Aug.1, 2012

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