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Empirical and deterministic approach for the optimization of wideband RF power amplifiers' behavior modeling and predistortion structure
Author(s) -
Fares MarieClaude,
Boumaiza Slim,
Wood John
Publication year - 2011
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.25660
Subject(s) - predistortion , wideband , amplifier , linearization , ldmos , w cdma , electronic engineering , computer science , rf power amplifier , engineering , nonlinear system , electrical engineering , code division multiple access , physics , cmos , transistor , quantum mechanics , voltage
This article presents an approach to determining the smallest number of coefficients of a Parallel Hammerstein (PH) model to reduce the development complexity of wideband RF power amplifiers' (PA) modeling and predistortion schemes. The visualization of the impulse responses of the different filters of the PH yields a systematic and single‐iteration approach for determining the optimal modeling structure, for example, filters' lengths. The approach was used to determine an optimal structure that linearizes the response of a 400‐watt LDMOS Doherty PA driven with a four carrier WCDMA signal. In the experiments conducted, the number of coefficients in the PH was reduced by about a factor of 2.5 without compromising its modeling and linearization performance. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:116–118, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25660