Title :
A dual branch Hammerstein-Wiener architecture for behavior modeling of wideband RF transmitters
Author :
Ghannouchi, Fadhel M. ; Taringou, Farzaneh ; Hammi, Oualid
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Calgary, Calgary, AB, Canada
Abstract :
This paper proposes a dual branch Hammerstein-Wiener system suitable for behavioral modeling of dynamic nonlinear RF power amplifiers and transmitters. The model consists of a Hammerstein system in parallel with a Wiener system. The model performances in time and frequency domains are experimentally evaluated for a 3G high power Doherty amplifier driven by multi-carrier WCDMA signals. For various orders, the performances of the proposed dual branch Hammerstein-Wiener model are benchmarked against those of the Hammerstein model, Wiener model, and the well established memory polynomial model. The proposed dual branch model achieves better performance than single branch Wiener and Hammerstein models with higher number of coefficients. Furthermore, it leads to normalized mean square error performance comparable to that of the memory polynomial model while requiring 30% to 40% less coefficients.
Keywords :
code division multiple access; integrated circuit modelling; mean square error methods; polynomials; power amplifiers; radio transmitters; radiofrequency amplifiers; 3G high power Doherty amplifier; Hammerstein system; Wiener system; behavior modeling; dual branch Hammerstein-Wiener architecture; dynamic nonlinear RF power amplifiers; mean square error; memory polynomial model; multi-carrier WCDMA signals; wideband RF transmitters; Broadband amplifiers; Nonlinear dynamical systems; Performance evaluation; Polynomials; Power amplifiers; Power system modeling; Radio frequency; Radiofrequency amplifiers; Transmitters; Wideband; Behavioral modeling; Hammerstein model; Wiener Model; memory effects; power amplifiers;
Conference_Titel :
Microwave Symposium Digest (MTT), 2010 IEEE MTT-S International
Conference_Location :
Anaheim, CA
Print_ISBN :
978-1-4244-6056-4
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2010.5515921