Development of Point-To-Point OCDMA System for Access Network using 2D MDW Code

Abstract

The expanding interest in traffic information has led to an increase of the capacity and functionality of communication systems. For this reason, various multiplexing techniques have been introduced with the purpose of allowing multiple users to share the same optical domain simultaneously. The basis of the system revolution is large bandwidth, the data transmission and security of transmitted information. Optical Code Division Multiple Access (OCDMA) is the most popular multiplexing technique due to its advantages which including the ability to provide as high capacity, flexible bandwidth, and capacity to improve the system security, large cardinality, and scalable asynchronous access. The OCDMA system can be affected by two major challenges which are Multiple Access Interference (MAI) and Phase Induced Intensity Noise (PIIN). Thus, a suitable system by utilizing 2D MDW code with a good cross correlation property is needed to suppress the effect of MAI and mitigate PIIN. Based on this assumption, many 1D codes have been developed in different domain (wavelength, time, and space), but using 1D codes require a very long code length to increase the number of simultaneous users. However, two-dimensional codes have been utilized with the purpose of enhancing the point-to-point OCDMA system performance by increasing the number of simultaneous users with short code length compared to 1D codes. The new point-to-point OCDMA system have been developed to overcome the MAI and PIIN. The study of the new OCDMA system is based on 2D MDW code. The construction of the system is focused on the efficiency of 2-D MDW code to suppress the influence of MAI and PIIN. In designing the system, we used 2D modified double weight (MDW) codes as a signature address since this code can handle more simultaneous active users with a large standard bit error rate (e.g., ≤ 10 -9). Via simulation results, we decided that the new system provides more better performance and improves the ability of the network. This new system can therefore be regarded as a promising optical access network solution for the next decade.