Eradication of Multiple Access Interference Using a Modified Multi-service Code for SAC---OCDMA

Phase induced intensity noise (PIIN) and multiple access interference (MAI) are the main parameters that affect the performance of optical code division multiple access (OCDMA) systems, leading to degradations in system performance and reduction in the number of active users. So, this paper presents an efficient modified multi-service (MMS) code that can be used for encoding the spectral amplitude of the optical source in OCDMA systems to avoid these limitations. The proposed code disposes the effect of MAI, PIIN, and gives better performance than the other traditional codes. It can support a large number of active users (80 at bit error rate of 10?9) with a small code weight (w = 4). Also, it achieves a practical code length with a simple receiver structure.