Choice of the Behavioral Model of the Non-Linear Solid-State Power Amplifier

This article discusses behavioral models of nonlinear power amplifiers based on the expansion of the boundary between their input and output signals in incomplete (truncated) systems of orthogonal functions that do not depend on the realizations of the signal. In this case, the coefficients of the model can be calculated expeditiously, using the corresponding asymmetric modification of the fast Fourier transform. Comparison of these models with traditional polynomial models.