Design and Performance Analysis of a Hybrid Optical CDMA/WDMA System with the Position Code

摘要

The Optical Code Division Multiple Access (OCDMA) is developed in order to work without the disadvantages of WDMA, but its data rate is limited by the low repetition rate of the ultrashort light pulse laser source. Hence, in this thesis, we proposed an OCDMA system with the position code to re-utilize the time slots wasted. We find that the performance of the new system will be better than that of original system. For example, it can accommodate at least 50 more users in the worst performance when BER is 10-9 , and suppress the NBI caused by WDMA signals in the hybrid OCDMA/WDMA system.