Broadband RF Power Amplifier Modeling Using an Enhanced Wiener Model

RF Power Amplifiers (PAs) intended for broadband applications such as WCDMA, WiMAX and LTE systems exhibits significant memory effects along with strong nonlinear behavior when operating at high input power. For these applications conventional Wiener models of PA which are used for modeling their behavior are not suitable, as they model the PA memory effects effectively only in the linear region and not in the nonlinear region. In this article, we propose a new PA behavioral model which accurately models the memory effects in the nonlinear region of the PA. The proposed PA model is based on an enhanced Wiener model known as, Wiener Quasi Dynamic Model which includes a time-delayed nonlinear block. Comparison of the enhanced Wiener model with the conventional Wiener model shows a significant improvement in the modeling performance of PA.