%0 Journal Article
%T Quantifying and Cancellation Memory Effect in High Power Amplifier for OFDM Systems
%A Haleh Karkhane
%A Ayaz Ghorbani
%A Hamidreza R. Amindavar
%J PIER    C
%D 2008
%I EMW Publishing
%R 10.2528/PIERC08041201
%X This paper is concerned with a new time-domain modeling topology for signals which is appliedto OFDM systems. This model is a more accurate based on Wiener approach. Also the memory effect will be shown using two-tone intermodulation distortion (IMD) measurement with different tone frequency spacing and power levels. Next adaptive predistorter to counterbalance the AM/AM andAM/PM nonlinear effects of the transmitter power amplifier is proposedb y Hammerstein approach. Finally we consider the effectiveness of proposedmetho don performance of OFDM signal as the wideband system by reduction of distortion. It is confirmed by computer simulation that proposedapproac h produces a faster convergence speed than the previous adaptive predistortion technique.
%U http://www.jpier.org/pierc/pier.php?paper=08041201