Simulation of OFDM Communication System Performance

This paper presents a MATLAB-based implementation for simulating the performance of OFDM communication systems. The code structure includes modular components for different modulation techniques (BPSK, QPSK, MSK, QAM) and channel models (AWGN, Rayleigh). Key algorithmic implementations feature orthogonal frequency division multiplexing with cyclic prefix insertion, channel equalization, and pilot-assisted channel estimation. The simulation specifically models IEEE 802.11a compliant OFDM systems with embedded pilot symbols to improve signal recovery in fading environments. Through comparative analysis of simulation results, the code provides insights into OFDM system performance under various modulation schemes and channel conditions, offering valuable references for practical system design and optimization. The implementation uses matrix-based operations for efficient DFT/IDFT computations and includes BER calculation modules for performance evaluation.