Abstract
One dimensional encoding in optical communications has limitations in terms of the number of supported users and large bandwidth consumption. This study presents a new algorithm to generate two-dimensional (2D) encoding utilizing permutation vectors (PV) theory for incoherent multiple access network to suppress multiple access interference (MAI) and system complexity. The proposed code design approach is based on spectral/spatial techniques for code generation. All possible combinations of PV code-sets are obtained by utilizing all permutations of the vectors with the repetition of each vector weight (W) times. Furthermore, the 2D-PV code-set is constructed by combining two code sequences of the 1D-PV code. Furthermore, the transmitter–receiver architecture of the 2D-PV spectral/spatial (S/S) code based OCDMA system is presented. The Gaussian approximation is used to analyze the performance of the proposed OCDMA system with 2D- PV code by considering various noise sources (shot, thermal, and PIIN). Results indicate that the 2D-PV code provides increased cardinality by eliminating phase induced intensity noise (PIIN) effects with a minimum likelihood of interference between multiple user data. Simulation implementations validate the proposed system performance for an agreeable bit error rate (BER) of 10–9
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This project was supported by the Deanship of Scientific Research at Prince Sattam Bin Abdulaziz University under the research project #2020/01/17075.
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Ahmed, H.Y., Zeghid, M., Imtiaz, W.A. et al. An efficient 2D encoding/decoding technique for optical communication system based on permutation vectors theory. Multimedia Systems 27, 691–707 (2021). https://doi.org/10.1007/s00530-020-00711-3
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DOI: https://doi.org/10.1007/s00530-020-00711-3