System Simulation of OFDM Signals in Multipath Transmission Channel Environments

This system simulation study investigates OFDM signal transmission in multipath channel environments, providing valuable insights for researchers and engineers. The research methodology begins with theoretical analysis of OFDM signals, examining transmission characteristics under multipath propagation conditions. We then developed a comprehensive system simulation model incorporating key factors such as channel fading, additive white Gaussian noise (AWGN), and Doppler effects. The simulation framework implements critical algorithms including inverse fast Fourier transform (IFFT) for modulation, cyclic prefix insertion, and maximum likelihood detection for signal recovery. Through extensive simulation experiments using MATLAB/Simulink platforms, we obtained significant results and conclusions regarding bit error rate (BER) performance, spectral efficiency, and channel capacity. These findings not only contribute to theoretical research but also provide practical guidance for real-world applications. We hope this systematic simulation study inspires researchers and engineers in related fields, promoting advancements in wireless communication technologies.