Abstract
This study investigated a novelty system known as optical code division multiple access-free space optics (OCDMA-FSO) based on a new two-dimensional successive weight (2D-SW) code. The proposed approach is developed to be employed in incoherent wireless optical networks to improve channel capacity, support a large number of concurrent users, accommodate a high bits rate, and eliminate the effect of electromagnetic and multiple access interferences. A new mathematical analysis for the proposed system has been detailed, including the expression of signal-to-noise ratio (SNR) and bit error rate (BER). Accordingly, the numerical outcomes of the mathematical analysis at a total data rate of 260 Gbps revealed that the proposed system enhanced the channel capacity to 2.04, 1.6, 3.32, 1.47, 1.68, 1.33, and 2.29 times than those of the systems based on the two-dimensional codes family including perfect difference (2D-PD), both diluted perfect difference (2D-DPD) and dynamic cyclic shift (2D-DCS), hybrid flexible cross-correlation/modified double weight (FCC/MDW), hybrid zero cross-correlation/multi-diagonal (2D-ZCC/MD), modified prime code (2D-MPC), hybrid prime code (2D-HPC), and one-dimensional successive weight (1D-SW), respectively. It can save − 4.9 dBm, − 2.9 dBm, − 4.3 dBm, and − 2.2 dBm of received power in comparison to both 2D-DPD, 2D-DCS, 2D-ZCC/MD, 2D-MPC, and 2D-HPC codes respectively, and it keeps − 6.2 dBm when moving from 1D-SW to 2D-SW. Moreover, the suggested network is also studied using Optisystem software at 30 Gbps of each channel, where it achieves a low BER value reaching \(1.72\times {10}^{-33}\) with a high transmission quality reaching 11.99 at a lengthy range attaining 1.3 km. Consequently, the results demonstrate that the proposed system can satisfy optical communication needs and be implemented in the next generations of wireless optical networks.
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Acknowledgements
This research was funded by the Researchers Supporting Project (number RSP2024R484), King Saud University, Riyadh, Saudi Arabia.
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King Saud University, Riyadh, Saudi Arabia, Grant/Award Number: RSP2024R484.
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Conceptualization, M.R. and A.C.; methodology, M.R. and G.N.S.; software, M.R. and M.I.R.; validation, M.I.R., B.S.B. and I.D.; formal analysis, M.R. and A.C.; investigation, M.R., A.C., and G.N.S.; resources, G.N.S. and M.I.R.; data curation, M.R. and I.D.; writing—original draft preparation, M.R. and M.I.R.; writing—review and editing, A.C., and G.N.S.; visualization, G.N.S. and B.S.B.; supervision, G.N.S. and I.D.; project administration, A.C. and G.N.S. All authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Rahmani, M., Cherifi, A., Sabri, G.N. et al. A novel 260 Gb/s 2D-OCDMA-FSO multiplexing system's performance evaluation for upcoming generations of high-speed wireless optical networks. Opt Quant Electron 56, 449 (2024). https://doi.org/10.1007/s11082-023-05947-7
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DOI: https://doi.org/10.1007/s11082-023-05947-7