MATLAB Simulation of OFDM System

This is a MATLAB simulation program for OFDM (Orthogonal Frequency Division Multiplexing) that can be executed directly without additional setup. The program implements OFDM technology to achieve high-speed data transmission through multiple orthogonal subcarriers. In the simulation code, we employ key functions like fft/ifft for efficient modulation and demodulation, and implement cyclic prefix insertion to combat intersymbol interference. Users can adjust various parameters including the number of subcarriers (controlled via NFFT variable), modulation schemes (such as QPSK, 16-QAM, or 64-QAM), and channel models (AWGN, Rayleigh, or Rician fading) to analyze transmission performance under different conditions. The simulation architecture also allows for integration of error correction coding techniques like convolutional codes or Reed-Solomon codes to enhance system reliability and stability. Through modifying and experimenting with this simulation program, users can gain deeper insights into OFDM principles and applications, providing valuable guidance for practical communication system design and optimization. The code structure includes clear sections for signal generation, modulation, channel modeling, and performance evaluation using BER (Bit Error Rate) calculations.