Extended 2D Codes Supporting Multirate and QoS in Optical CDMA Networks With Poisson and Binomial MAI Models
In this paper, an extended 2D multiweight multilength optical orthogonal code (MWML-OOC) is proposed and analyzed using both Poisson and binomial distributions of multiple access interference (MAI). We also analyze the performance of 1D and 2D MWML-OOC that can support multirate transmission and quality-of-services (QoS) differentiation in the optical code-division multiple-access networks. The theory of the 1D MWML-OOC is reviewed where its bit-error rate (BER) performance analysis, based on the binomial model of MAI using the convolution technique, is presented and compared with the well-known Poisson model. The results indicated that the overall performance referred to as BER considering the binomial distribution of MAI is better than that obtained from Poisson-modeled MAI for both 1D and 2D MWML-OOCs. It was also found that the extended 2D MWML-OOC can support a greater number of users with reduced chip times and highly improve the BER performance compared with its 1D and 2D counterparts.
2d codes multirate optical cdma binomial distribution poisson model 1d codes qos differentiation