OFDM Pre-distortion Simulation Model Built with Simulink

This article presents a method for constructing an OFDM pre-distortion simulation model using Simulink. The model performs signal preprocessing to mitigate distortion during transmission, thereby improving signal quality and overall system performance. In implementation, the model typically employs Look-Up Table (LUT) based digital predistortion algorithms or polynomial-based compensation techniques within Simulink blocks. Key components include IFFT/FFT modules for OFDM modulation/demodulation, nonlinear amplifier blocks with memory effects, and adaptive predistortion controllers that continuously update correction parameters based on feedback signals. The model utilizes Simulink's communication system toolbox for configuring OFDM parameters like subcarrier spacing and cyclic prefix length. This simulation framework plays a crucial role in communication system design and optimization by enabling real-time performance analysis of predistortion algorithms under various channel conditions.