Impact of the unipolar family codes on the performances of the DS-OCDMA system

Amel Farhat; Mourad Menif; Catherine Lepers; Houria Rezig; Philippe Gallion

doi:10.1117/12.803476

11 November 2008 Impact of the unipolar family codes on the performances of the DS-OCDMA system

Amel Farhat, Mourad Menif, Catherine Lepers, Houria Rezig, Philippe Gallion

Proceedings Volume 7136, Optical Transmission, Switching, and Subsystems VI; 71360Y (2008) https://doi.org/10.1117/12.803476
Event: Asia-Pacific Optical Communications, 2008, Hangzhou, China

Abstract

This paper presents the Direct Sequence Optical Code Division Multiple Access (DS-OCDMA) system using two configurations of the optical source. To encode/decode transmitted data, we used Superstructured Fiber Bragg Grating (S-FBG) as encoders/decoders. We consider three unipolar family codes which are the Prime Sequence (PS), Quadratic Congruence (QC) and the Extended Quadratic Codes (EQC) codes. In order to evaluate the performances of our system in term of Bit Error Rate (BER), we implement the Importance Sampling (IS) technique, which is a variant of the wellknown Monte-Carlo (MC) method. Our simulation results depict that EQC codes outperform QC and PS codes for the DS-OCDMA system using either coherent or incoherent source. We show also that using EQC codes with increasing the optical bandwidth and maintaining the electrical filter leads to improve the performance of incoherent system.

Citation Download Citation

Amel Farhat, Mourad Menif, Catherine Lepers, Houria Rezig, and Philippe Gallion "Impact of the unipolar family codes on the performances of the DS-OCDMA system", Proc. SPIE 7136, Optical Transmission, Switching, and Subsystems VI, 71360Y (11 November 2008); https://doi.org/10.1117/12.803476

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KEYWORDS

Picosecond phenomena

Monte Carlo methods

Computer programming

Receivers

Telecommunications

Error analysis

Interference (communication)

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