New Zero Cross-Correlation Codes Based on Zech Method’s for OCDMA Systems

Authors : Bensaad ABDELLAH, Garadi AHMED, Beloufa ABBES, Bensaad ZOUAOUİ

Pages : 238-247

Doi:10.35378/gujs.994461

View : 13 | Download : 8

Publication Date : 2023-03-01

Article Type : Research Paper

Abstract :A new structure code for Spectral Amplitude Coding Optical Code Division Multiple Access insert ignore into journalissuearticles values(SAC–OCDMA); system with zero cross-correlation insert ignore into journalissuearticles values(ZCC); is presented in this paper. The principle idea of this method is based on the use of Zech logarithms in the construction of the code sequences to ensure orthogonality and compare their performances with previously reported codes. The maximum cross-correlation of this code is zero signifying that Multi-Access Interference insert ignore into journalissuearticles values(MAI); and Phase-Induced intensity noise insert ignore into journalissuearticles values(PIIN); effects are eliminated thus the system performances are improved. The BER simulation results against the total number of active users show a significant improvement in the performance of the proposed code over preceding reported codes. The system can accommodate more than 90 simultaneous users compared to other codes at a bit error rate of 10^insert ignore into journalissuearticles values(-9);. Furthermore, the construction method offers good flexibility in the choice of the number of users, the weight, and the code length.
Keywords : Direct detection, MAI Interference, OCDMA, ZCC code, Zech code