Optical Code Construction of Balanced Weight Ideal Cross-Correlation Code for Spectral Amplitude Coding Optical CDMA Systems

Abstract

In spectral amplitude coding optical code division multiple access (SAC-OCDMA) codes should be designed with best cross correlation and auto correlation properties. In this paper, we have proposed a new balanced weight ideal cross-correlation (BWICC) code for SAC-OCDMA which provides improved code construction and system performance. The BWICC code has a unitary matrices property and very less overlaps in spectra of various clients due to its ideal cross-correlation properties among each user. This reduces multiple access interference (MAI) to a considerable extent. Furthermore, proposed code provides moderate code length as compared to other ideal in phase cross-correlation codes. Initially, basic matrix is constructed based on required number of users and code weight value. Number of columns and rows are determined after this. BWICC code is explained as; at first a basic matrix is constructed utilizing the code weight value and the number of users. Finally, rows and columns are found out in the code matrix. Secondly, each diagonal sequences are computed. Proposed code performance analysis is performed in terms of quality factor and BER using simulation.