OFDM System Simulation under Multipath Fading Channels using MATLAB

This project focuses on simulating OFDM (Orthogonal Frequency Division Multiplexing) systems under multipath fading channels using MATLAB. The simulation framework allows implementation of various multipath channel models, including Rayleigh fading channels (suitable for non-line-of-sight environments) and Rician fading channels (appropriate for scenarios with dominant line-of-sight components). Key implementation aspects involve generating channel coefficients using built-in MATLAB functions like rayleighchan or ricianchan, and applying them to OFDM symbols through convolution operations.

The simulation enables systematic adjustment of critical OFDM parameters to analyze their impact on system performance. These include the number of subcarriers (implemented via FFT size configuration), cyclic prefix length (added using array concatenation methods), and modulation schemes (BPSK, QPSK, 16-QAM etc.). Performance metrics such as Bit Error Rate (BER) can be evaluated by comparing transmitted and received symbols using error calculation algorithms.

Through these comprehensive simulations, researchers can deeply investigate OFDM system characteristics under realistic channel conditions. The MATLAB code structure typically includes modules for signal generation, channel modeling, OFDM modulation/demodulation, and performance analysis. The results provide valuable insights for practical OFDM system design, optimization guidelines, and performance prediction in real-world wireless communication scenarios.