Hybrid OCDMA System using Modified Double Weight Code (MDW) for optical access network

This paper is for transmission of video data using optical code division multiple access (OCDMA) system over WDM. OCDMA system is proposed for supporting large numbers of subscriber in optical access network. The system performance is analyzed using Modified Double Weight (MDW) Code because it help to decrease the Multiple Access interference (MAI) to great extend at the transmitter side. Also at the receiver side we use the NAND subtraction technique to detect the signal. Using network simulation we conclude that this system gives better results compare to OCDMA system using MDW code. We also ascertained by simulation that NAND subtraction technique highly improves BER performance of the system compare to other detection techniques.