Implementation of Multi-Carrier Modulation Using OFDM (Orthogonal Frequency Division Multiplexing)

OFDM (Orthogonal Frequency Division Multiplexing) implements multi-carrier modulation by dividing a broadband channel into multiple parallel narrowband subchannels, where each subchannel experiences flat fading. A complete OFDM channel link system is constructed using three different channel estimation methods (LS channel estimation, DFT channel estimation, and Improved-DFT channel estimation). The system performance is simulated and compared under both AWGN (Additive White Gaussian Noise) ideal channels and fading channels in terms of bit error rate analysis.