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2-D optical CDMA networks using MWPM, double hard limiters and modified carrier-hopping prime sequences

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2 Author(s)
Ping Wang ; Dept. of Electr. & Comput. Eng., McGill Univ., Montreal, Que., Canada ; Le-Ngoc, Tho

This paper presents a two-dimensional optical code division multiple access (2-D-OCDMA) scheme using multiwavelength pulse modulation (MWPM), double optical hard limiters (DHL), and modified carrier-hopping prime sequences (MCHP) to increase the achievable system capacity. Design criteria to reduce multiaccess interference (MAI) are established and indicate that suitable signature sequences for 2-D-OCDMA/MWPM must have good cross-correlation property in terms of both time shift and wavelength shift. Performance analysis of 2-D-OCDMA/MWPM/DHL systems in the presence of MAI and photo detector shot noise is developed. Simulation and analytical results are in very good agreement and indicate that the proposed 2-D-OCDMA/MWPM/DHL systems using MCHP sequences can offer a much larger capacity than others, suitable for applications in broadband fiber-optic access networks.

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Lightwave Technology, Journal of  (Volume:23 ,  Issue: 10 )