Title :
Weighted criteria for RF power amplifiers identification in wide-band context
Author :
Bouajina, Sonia Saied ; Jaidane, Meriem ; Ghannouchi, Fadhel
Author_Institution :
Signals & Syst. Res. Unity, Eng. Sch. of Tunis, Tunis
fDate :
Aug. 31 2008-Sept. 3 2008
Abstract :
Modeling accurately RF power amplifiers (PAs) is an essential first step for predistortion and identification purposes. In WCDMA context, we prove that inaccurate results of identification are achieved because of the inadequacy of the classical criteria of least squares fitting to the WCDMA input pdf. The performances of the identification can be enhanced through a weighted criteria taking into account AM/AM dispersion for low input amplitudes. In this paper, the weighted criteria is validated for 1- carrier WCDMA input and two RF PAs, considering polynomial memoryless model and multibranch polynomial model.
Keywords :
code division multiple access; least squares approximations; power amplifiers; RF power amplifiers identification; WCDMA context; identification purposes; least squares fitting; multibranch polynomial model; polynomial memoryless model; predistortion purposes; wide-band context; Broadband amplifiers; Dispersion; Multiaccess communication; Polynomials; Power amplifiers; Power engineering and energy; RF signals; Radio frequency; Radiofrequency amplifiers; Radiofrequency identification;
Conference_Titel :
Electronics, Circuits and Systems, 2008. ICECS 2008. 15th IEEE International Conference on
Conference_Location :
St. Julien´s
Print_ISBN :
978-1-4244-2181-7
Electronic_ISBN :
978-1-4244-2182-4
DOI :
10.1109/ICECS.2008.4674819