OFDM+MIMO+Rayleigh Channel Simulation M-file Implementation

This article presents a comprehensive simulation framework integrating OFDM (Orthogonal Frequency Division Multiplexing), MIMO (Multiple-Input Multiple-Output) systems, and Rayleigh channel modeling. The simulation M-files implement key algorithms including: - OFDM modulation/demodulation with IFFT/FFT operations and cyclic prefix insertion - MIMO spatial multiplexing with channel matrix calculations - Rayleigh fading channel generation using complex Gaussian random variables The implementation demonstrates practical techniques such as pilot symbol insertion for channel estimation, zero-forcing equalization for signal recovery, and bit error rate (BER) performance analysis. Through downloadable M-files, researchers can examine: - Frame structure design with synchronization sequences - Channel coding and interleaving techniques - Performance comparison between SISO and MIMO-OFDM systems Case studies included showcase real-world applications in wireless communication standards like 4G LTE and 5G NR, along with emerging trends in massive MIMO and mmWave communications. The modular code structure allows users to modify parameters including carrier frequency, bandwidth, antenna configuration, and Doppler shift effects for customized simulations. This resource provides valuable insights for understanding wireless system design principles and serves as a practical foundation for academic research and industrial development projects.