OFDM Implementation in ROF Fiber-Wireless Communication System

This project implements a MATLAB simulation of OFDM technology applied in ROF (Radio-over-Fiber) fiber-wireless communication systems, employing 4QAM modulation scheme and Least Squares (LS) channel estimation algorithm. The simulation includes Optisystem modeling, representing a highly valuable graduation project implementation. The core MATLAB implementation involves OFDM signal generation with 4QAM modulation, where binary data is mapped to quadrature amplitude modulation symbols. The LS channel estimation technique is implemented using pilot symbols inserted in the OFDM frame to estimate channel frequency response. Key functions include OFDM modulator/demodulator, 4QAM mapper/demapper, and LS estimation algorithm calculating channel coefficients using known pilot sequences. This simulation experiment combines optical fiber and wireless communication through OFDM technology, providing significant references for wireless communication system design and optimization. By integrating MATLAB's digital signal processing capabilities with Optisystem's optical communication modeling, the simulation enables comprehensive performance evaluation of ROF systems. The experimental results facilitate better understanding and assessment of ROF fiber-wireless communication system performance, offering valuable guidance and insights for future research and development in hybrid optical-wireless communication systems.