MATLAB Simulation of OFDM Signal and Its Frequency Spectrum

This document presents MATLAB simulation source code for Orthogonal Frequency Division Multiplexing (OFDM) signals and their frequency spectrum analysis. The implementation utilizes randomly generated binary sequences as input data, incorporating guard intervals to enhance transmission reliability. Key algorithmic components include: binary-to-symbol mapping using modulation schemes like QPSK or 16-QAM, inverse fast Fourier transform (IFFT) for multicarrier modulation, cyclic prefix insertion as guard intervals, and fast Fourier transform (FFT) operations for spectral analysis. The simulation enables comprehensive study of OFDM characteristics including peak-to-average power ratio (PAPR), spectral efficiency, and robustness against multipath interference. Through this detailed implementation, researchers can effectively analyze OFDM system performance and its applications in modern communication systems, providing valuable insights for wireless communication design and optimization.