Design of a Hybrid OCDMA/WDMA System by Using Multi-slot OCDMA Scheme

Abstract

The data rate of the coherent ultrashort light pulse code-division multiple access (CDMA) communication systems proposed by J. A. Salehi, et al. [5] is limited by the low repetition rate of the ultrashort pulse laser source. In this paper, we propose a Multi-slot OCDMA system to resolve the issue of low data rate and use the scheme in the hybrid OCDMA/WDMA system. Data rate and total throughput can be really increased with the increased number of slots with the proposed system. For example, if 512 chips are used for OCDMA system, the system can simultaneously accommodate more than 10 6-slot OCDMA and 30 WDMA users, achieving a total throughput of around 660Gbps at a BER of 10−9 .