MATLAB Implementation of OFDM System with Channel Estimation and Equalization

This MATLAB program implements a complete OFDM system incorporating channel estimation, equalization, and modulation/demodulation processes. The implementation is highly practical and designed for easy comprehension, making it suitable for analyzing and simulating performance characteristics of various wireless communication systems, including the impact of channel estimation and equalization techniques. The code structure includes key algorithmic components such as pilot symbol insertion for channel estimation, least squares or MMSE estimation methods, and frequency-domain equalization using zero-forcing or MMSE approaches. Through this program, users can gain deep insights into OFDM system operation principles and conduct performance evaluation and optimization studies. The implementation provides rich graphical interfaces and result visualization capabilities, allowing users to intuitively observe and analyze system performance metrics through plots of constellation diagrams, bit error rate curves, and channel frequency response characteristics. The modular code design separates transmitter, channel, and receiver functionalities, enabling easy customization and extension. Overall, this MATLAB program serves as a valuable tool for both academic research and engineering practice, offering hands-on experience with OFDM system implementation while maintaining code readability and educational value. The program includes commented code sections explaining key operations such as cyclic prefix addition/removal, FFT/IFFT processing, and equalizer weight calculation algorithms.