Simulation of MIMO System with 2-D and 3-D Optical Orthogonal Codes Using MATLAB and OptiSystem

摘要

An Optical Orthogonal Code (OOC) is a family of binary codes involving Os and 1s which is having predefined auto correlation function (ACF) and cross correlation functions (CCF). The study of OOCs has an immense application in a fiber optic code division multiple access (FO-CDMA/OCDMA). Two dimensional optical orthogonal codes (2-D OOCs) spreads over time and wavelength co-ordinates, while three dimensional optical orthogonal codes (3-D OOCs) spreads over time, wavelength and space co-ordinates, which obviously shows improved performance over 1-D and 2-D OOCs. For a 1-D OOC, if we opt for maintaining good correlation function values, the code length must be a large value as the number of users in the system is more. By adding more dimensions, we can increase the performance parameters, by allowing codewords to be formed with restrictions applied on the occurrence of pulses in each row, resulting in the autocorrelation value (λa) to become zero. This paper aims to simulate the study of 2-D and 3-D OOCs using MATLAB and OptiSystem tools, for implementing a MIMO communication system over fibre optic channel.