DocumentCode :
1333810
Title :
An Efficient Predistorter Design for Compensating Nonlinear Memory High Power Amplifiers
Author :
Chen, Sheng
Author_Institution :
Sch. of Electron. & Comput. Sci., Univ. of Southampton, Southampton, UK
Volume :
57
Issue :
4
fYear :
2011
Firstpage :
856
Lastpage :
865
Abstract :
This contribution applies digital predistorter to compensate distortions caused by memory high power amplifiers (HPAs) which exhibit true output saturation characteristics. Particle swarm optimization is first implemented to identify the Wiener HPA´s parameters. The estimated Wiener HPA model is then directly used to design the predistorter. The proposed digital predistorter solution is attractive owing to its low on-line computational complexity, small memory units required and simple VLSI hardware structure implementation. Moreover, the designed predistorter is capable of successfully compensating serious nonlinear distortions and memory effects caused by the memory HPA operating in the output saturation region. Simulation results obtained are presented to demonstrate the effectiveness of this novel digital predistorter design.
Keywords :
VLSI; analogue integrated circuits; circuit complexity; circuit optimisation; compensation; integrated memory circuits; parameter estimation; particle swarm optimisation; power amplifiers; stochastic processes; VLSI hardware structure implementation; Wiener HPA model; digital predistorter design; nonlinear memory HPA; nonlinear memory high power amplifier compensation; online computational complexity; output saturation characteristics; parameter identification; particle swarm optimization; Mathematical model; Nonlinear distortion; Optimization; Polynomials; Power amplifiers; Predistortion; Hammerstein model; Wiener model; memory high power amplifier; output saturation; particle swarm optimization; predistorter;
fLanguage :
English
Journal_Title :
Broadcasting, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9316
Type :
jour
DOI :
10.1109/TBC.2011.2165008
Filename :
6029297
Link To Document :
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