A Digital Predistortion Maker With Adaptation Characteristic
Subject Areas : Renewable energy
Mohammad Reza Soltani
1
(MSc/Islamic Azad University, Tiran, Najafabad)
Ebrahim Borzabadi
2
(Associate Professor/ Najafabad Branch, Islamic Azad University)
Mohammad Reza Zadhoosh
3
(Islamic Azad University, Najafabad Branch)
Rasul Amirfattahi
4
(Associate Professor/Isfahan University of Technology)
Keywords: Linearization, Predistorer, RF amplifier, FIR filter,
Abstract :
In this paper we study a technique of power RF amplifier linearization predistortion digital circuits and propose a method for adapting this circuit and compare the advantages and disadvantages of this circuit with conventional predistortion circuit. The main problem with predisrortion circuit is the memory effect. We purpose a new circuit to overcome disrortion and memory effect problems based on DSP. Finally we compare results of our simulation with previous results. Our simulation shows a significant reduction in power ratio of adjacent channels.
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