OFDM for Effective Mitigation of Multipath Delay Spread

Orthogonal Frequency Division Multiplexing (OFDM) technology effectively mitigates multipath delay spread, serving as a fundamental technique in modern wireless communication systems. OFDM enhances spectral efficiency and interference resistance by transmitting non-overlapping signals across multiple orthogonal subcarriers. The implementation typically involves inverse Fast Fourier Transform (IFFT) for signal modulation and cyclic prefix insertion, which acts as a guard interval to eliminate both Inter-Symbol Interference (ISI) and Inter-Carrier Interference (ICI). The cyclic prefix operation involves copying the end portion of each OFDM symbol to its beginning, creating a buffer that absorbs multipath propagation effects. This project implements a complete OFDM system simulation, including subcarrier mapping, pilot insertion, channel coding, and equalization modules to validate system performance and reliability under various channel conditions. Performance metrics such as Bit Error Rate (BER) and Signal-to-Noise Ratio (SNR) are analyzed through MATLAB-based simulation code that models real-world multipath fading scenarios.