MATLAB Code Implementation for OFDM System Simulation

This article presents a comprehensive MATLAB implementation of an OFDM system simulation. The program incorporates key components such as digital modulation/demodulation schemes, cyclic prefix insertion/removal algorithms, inverse fast Fourier transform (IFFT) and fast Fourier transform (FFT) operations, along with detailed channel modeling techniques. The simulation framework is designed to model and evaluate OFDM system performance, facilitating better understanding and optimization of various system aspects through practical code implementation. Key implementation features include: - Modulation/demodulation using MATLAB's digital modulation functions with configurable schemes (QPSK, 16-QAM, etc.) - Cyclic prefix handling through array manipulation functions for intersymbol interference mitigation - IFFT/FFT processing using MATLAB's built-in fft and ifft functions with proper scaling - Channel modeling including AWGN, multipath fading, and Doppler effects simulation - Bit error rate (BER) calculation and performance analysis tools - Parameterized system configuration for flexible testing scenarios The code structure follows modular design principles, allowing independent testing of each subsystem while maintaining seamless integration for end-to-end simulation.