Title :
Characterization of Electrical Memory Effects in Power Amplifier using Multi-tone Measurement
Author :
Kyungtae Oh ; YoungSup Lee ; Hyunchul Ku ; Dongsu Kim ; Chan Sei Yoo ; Woo Sung Lee
Author_Institution :
Dept. of Electron. Eng., Konkuk Univ., Seoul
Abstract :
In this paper, an efficient method to characterize electrical memory effects arising from the interaction between the static nonlinearity and the frequency response is proposed using a multi-tone measurement. A transmitter system with nonlinear power amplifier (PA) is modeled with two box Wiener structure that consists of a static Saleh model and a linear filter. A nonlinear least square method with a multi-tone measurement is used to extract frequency response and nonlinear characteristics. The proposed method is verified with a simulation and experiment with a 10W class AB gallium-nitride (GaN) HEMT PA.
Keywords :
Wiener filters; frequency response; least mean squares methods; power amplifiers; Wiener structure; electrical memory effect; frequency response; linear filter; multitone measurement; nonlinear least square method; nonlinear power amplifier; static Saleh model; static nonlinearity; Electric variables measurement; Frequency measurement; Frequency response; Gallium nitride; Least squares methods; Nonlinear filters; Power amplifiers; Power measurement; Power system modeling; Transmitters; Saleh model; Wiener; memory effects; multi-tone; nonlinear least square;
Conference_Titel :
Microwave Conference, 2007. APMC 2007. Asia-Pacific
Conference_Location :
Bangkok
Print_ISBN :
978-1-4244-0748-4
Electronic_ISBN :
978-1-4244-0749-1
DOI :
10.1109/APMC.2007.4554694
