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Author Anding Zhu ♦ Draxler, P.J. ♦ Yan, J.J. ♦ Brazil, T.J. ♦ Kimball, D.F. ♦ Asbeck, P.M.
Sponsorship IEEE Microwave Theory and Techniques Society
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©1963
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Electricity & electronics ♦ Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Radio frequency ♦ Power amplifiers ♦ Radiofrequency amplifiers ♦ Nonlinear distortion ♦ Nonlinear dynamical systems ♦ Transmitters ♦ System identification ♦ Real time systems ♦ Power system modeling ♦ Interpolation ♦ Volterra series ♦ Behavioral modeling ♦ linearization ♦ power amplifier (PA) ♦ predistorter ♦ sampling
Abstract In this paper, we propose an efficient open-loop digital predistorter (DPD) derived from the dynamic deviation reduction-based Volterra series that allows compensation for both nonlinear distortion and memory effects induced by RF power amplifiers in wireless transmitters. In this approach, the parameters of the predistorter can be directly extracted from an offline system identification process. This eliminates the usual requirement for a closed-loop real-time parameter adaptation, which dramatically reduces the implementation complexity of the system. It is shown that a further reduction in system complexity can be achieved by applying under-sampling theory in the model extraction and utilizing parameter interpolation in the DPD implementation. Experimental results show that by utilizing this technique with only a small number of parameters, nonlinear distortion induced by the PA can be significantly reduced, as evaluated by both adjacent channel power ratio reduction and normalized root mean square error improvement. A comparison with a memoryless polynomial function based predistorter and an analysis of the impact of decresting are also presented.
Description Author affiliation :: Sch. of Electr., Univ. Coll. Dublin, Dublin
ISSN 00189480
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2008-07-01
Publisher Place U.S.A.
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Volume Number 56
Issue Number 7
Size (in Bytes) 1.55 MB
Page Count 11
Starting Page 1524
Ending Page 1534


Source: IEEE Xplore Digital Library