DESIGN AND PERFORMANCE ANALYSIS OF AN OPTICAL CDMA SYSTEM FOR 2-D PERFECT DIFFERENCE CODES USING SHIFTED SINE FUNCTIONS

Abstract

In this thesis, an optical CDMA system (OCDMA) for 2-D Perfect Difference Codes using Shifted Sine Functions (SSF) has been proposed. The performance analysis for this OCDMA system has been done. Bit Error Rate (BER) estimations for different no. of active or effective users and for different effective power for each user (in dBm) have been made. This system is modeled and analysed taking into account Multiple Access Interference(MAI) or Multiuser Interference (MUI),Thermal Noise and Phase Induced Intensity (PIIN) Noise. Semianalytic Techniques have been used for estimating BER. Performance comparison of the proposed system with the DOCDMA system using SSFs as functional codes , Noncoherent spatial/ spectral OCDMA system with 2-D perfect difference codes and OCDMA system for 2-D M-matrices codes, has been done. A MATLAB Code has been written for performance comparison. The results show that the proposed system improves the bit error rate (BER) performance for ...