Introduction to OFDM Technology with MATLAB Implementation

This document presents an introduction to Orthogonal Frequency Division Multiplexing (OFDM) technology, a digital modulation technique commonly used in wireless communications. OFDM transmits data by dividing the data stream into multiple smaller substreams, with each substream modulated in the frequency domain. Due to its advantages in combating multipath fading and achieving high spectral efficiency, OFDM has gained widespread application in modern wireless communication systems. The MATLAB source code provided demonstrates key implementation aspects including signal modulation using QAM, IFFT transformation for parallel-to-serial conversion, cyclic prefix insertion for mitigating inter-symbol interference, and channel equalization techniques. The code allows readers to explore practical implementation details such as subcarrier allocation, pilot insertion for channel estimation, and synchronization methods, providing hands-on understanding of OFDM system design and performance characteristics.