Modeling and Linearization Method for Nonlinear Power Amplifier with Memory Effect for Wideband Application

Abstract

This paper represents a new adaptive method to model the nonlinearity of power amplifiers(PAs) with memory effects based on Wiener approach and also adaptive predistorter to counterbalance the AM/AM and AM/PM nonlinear effects of the transmitter power amplifier is proposed by Hammerstein approach. Finally we consider the effectiveness of proposed method on performance of OFDM signal as the wideband system by reduction of distortion. It is confirmed by computer simulation that proposed approach produces a faster convergence speed than the previous adaptive predistortion technique.