MATLAB Simulation of EM Channel Estimation for OFDM Systems

This document presents my MATLAB simulation program for EM channel estimation in OFDM systems. The program is designed as an executable simulation that implements the complete Expectation-Maximization algorithm for channel estimation, featuring key components such as OFDM signal generation, pilot insertion, noise modeling, and iterative channel parameter estimation. The simulation provides a practical tool for understanding the principles and implementation of EM channel estimation in OFDM systems, with code structures demonstrating the E-step (expectation) for estimating hidden channel parameters and the M-step (maximization) for updating channel estimates. The modular design allows for easy adaptation to research and development of other OFDM system aspects, including channel coding/decoding implementations and error correction techniques. The program utilizes MATLAB's signal processing capabilities for efficient matrix operations and includes visualization functions to display channel estimation results and performance metrics. This implementation aims to assist researchers and engineers working with OFDM systems by providing an accessible platform for testing and optimizing channel estimation algorithms, thereby enhancing work efficiency and research capabilities in wireless communication systems.