MATLAB Implementation of Saleh Model for Memoryless Amplifiers with IBO/OBO Support

This article presents the development of MATLAB code for implementing the Saleh model for memoryless amplifiers. The code is designed to support Input Back-Off (IBO) and Output Back-Off (OBO) specifications, which are crucial parameters for amplifier linearization and power efficiency. Key implementation aspects include thorough analysis of the Saleh model components, particularly the nonlinear amplitude (AM-AM) and phase (AM-PM) conversion characteristics. The code incorporates signal gain calculation algorithms and distortion analysis methods to accurately model amplifier behavior. For optimal performance, the implementation considers computational efficiency through vectorized operations and precomputation techniques. The development process involves evaluating different algorithmic approaches, including lookup table implementations and direct polynomial computations for the Saleh equations, to balance accuracy with computational complexity. Memory optimization strategies are employed to ensure stable operation in practical applications, with particular attention to handling large input signal arrays. The code structure includes modular functions for parameter initialization, nonlinearity computation, and performance metrics calculation, facilitating easy integration into larger communication system simulations.