RF power amplifier behavioral modeling using Volterra expansion with Laguerre functions

The requirement for an estimation of a large number of parameters is a major limitation in using the Volterra series to model nonlinear RF power amplifiers. In this paper, we propose a new behavioral model for power amplifiers by projecting the classical Volterra series onto a set of orthonormal basis functions (Laguerre functions). This approach enables a substantial reduction in the number of parameters involved, and allows the reproduction of both transient and steady-state behavior of power amplifiers with excellent accuracy.