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2008-05-12

Quantifying and Cancellation Memory Effect in High Power Amplifier for OFDM Systems

By Haleh Karkhane, Ayaz Ghorbani, and Hamid Reza Amin Davar
Progress In Electromagnetics Research C, Vol. 3, 183-194, 2008
doi:10.2528/PIERC08041201

Abstract

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.

Citation


Haleh Karkhane, Ayaz Ghorbani, and Hamid Reza Amin Davar, "Quantifying and Cancellation Memory Effect in High Power Amplifier for OFDM Systems," Progress In Electromagnetics Research C, Vol. 3, 183-194, 2008.
doi:10.2528/PIERC08041201
http://jpier.org/PIERC/pier.php?paper=08041201

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