Performance Analysis of OCDMA Communication Systems

Abstract

From the previous chapters we have learned that a typical OCDMA communication system can be shown as in Fig. 5.1. We assume that there are totally M subscribers implementing full duplex communication in an OCDMA network and N users are active and share the common channels at the same time. (In a practical network, all subscribers connected to a network are not always activated, especially in a subscriber access network and, as a matter of fact, the number of subscribers activated at the same time accounts for about 10% of the total number[1].) We suppose that if the j ^th subscriber wants to send data information to the k ^th user, the address code for receiver k is impressed upon the data by the encoder at the j ^th node. One of the primary goals of OCDMA is to extract data with the desired optical pulse sequence in the presence of all other users’ optical pulse sequences.