Power Amplifier Pre-distortion Using the Saleh Model

This program illustrates the complete procedure for implementing power amplifier pre-distortion using the Saleh model. The implementation begins by modeling the input signal through the Saleh model, which mathematically characterizes the amplifier's nonlinear behavior using amplitude-to-amplitude (AM-AM) and amplitude-to-phase (AM-PM) conversion functions. The algorithm calculates the pre-distortion signal by applying the inverse transfer function of the Saleh model to compensate for the anticipated nonlinear distortion. The generated pre-distortion signal is then fed into the power amplifier, effectively reducing nonlinear distortion effects and enhancing the amplifier's overall performance metrics including linearity and efficiency. The code provides adjustable parameters that control the pre-distortion intensity, allowing users to optimize the compensation level for specific power amplifier characteristics and input signal conditions. Key functions include parameter initialization, Saleh model inversion computation, and signal preprocessing modules. Through this implementation, users can gain practical understanding of the Saleh model's application in power amplifier linearization techniques, enabling improved performance and reliability in real-world applications such as wireless communication systems and radar transmitters.