Typical OFDM-Based Modulation and Demodulation System

This project implements a typical OFDM-based modulation and demodulation system that generates both simulated and theoretical plots of Bit Error Rate (BER) versus Signal-to-Noise Ratio (SNR). The main execution file ofdm.m contains the core implementation, which typically includes modules for signal modulation, IFFT/FFT operations, cyclic prefix insertion/removal, and channel modeling. Users can adjust various system parameters (such as modulation scheme, FFT size, cyclic prefix length, and channel conditions) to observe how these changes affect system performance. The comparative analysis between simulation results and theoretical curves provides comprehensive insights into OFDM system performance characteristics and advantages, including its robustness against multipath fading and spectral efficiency. The code structure likely employs MATLAB's communication toolbox functions for modulation/demodulation and includes AWGN channel simulation to generate the BER-SNR relationships.