OFDM Communication System Simulation with Performance Analysis

This paper presents a comprehensive simulation study of OFDM communication systems. The implementation utilizes Additive White Gaussian Noise channel modeling to generate Bit Error Rate versus Signal-to-Noise Ratio performance curves. The simulation code includes key components such as QAM modulation, IFFT/FFT operations for orthogonal subcarrier generation, cyclic prefix insertion, and channel equalization. After generating the simulation graphs, we conduct comparative analysis with theoretical BER curves to validate the accuracy of our simulation results. These experiments provide valuable insights into OFDM system performance under varying SNR conditions, facilitating deeper research and optimization of communication system parameters. The MATLAB implementation employs built-in functions like awgn for channel modeling and berawgn for theoretical BER calculation, while custom functions handle OFDM symbol mapping and demodulation processes.