Sokaina Boukricha
ABSTRACT
In this paper, we investigate the performance of Spectral Amplitude Coding $-$ Optical Code Division Multiple Access (SAC-OCDMA) system using the m-sequence code as a signature sequence for the coding and the decoding processes. The first simulations have been carried out for a system of 8 users to investigate its performance for different values of the optical source power and the FBG's bandwidth. Then, the performance of a 10-user SAC-OCDMA system was demonstrated in terms of BER and Q-factor versus the number of active users for different transmission distances. The simulation results show that the proposed SAC-OCDMA system performs well at an optical power of -110 dBm and a FBG bandwith of 0.3 nm. In addition, for a transmission distance of 5 km, the number of possible active users is 9 users, while for 45 km, the number of possible active users is decreasing to 5 users. This shows that there is a non-proportional relationship between transmission distance and number of users, so that as the distance increases, the number of users decreases.
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Index Terms
- Evaluation of SAC-OCDMA System Performance in Terms of BER and Q-Factor Using FBGs and M-Sequence Code
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