Title :
Closed-form expression of IMD considering input/output frequency responses in nonlinear RF power amplifiers for digital predistortion
Author_Institution :
Konkuk Univ., Seoul
Abstract :
In this paper, a novel closed-form expression of the intermodulation distortion (IMD) of nonlinear RF power amplifier (PA) considering input and output frequency responses is proposed. A transmitter including nonlinear PA is modeled with three-box (Wiener-Hammerstein type) model to include input and output frequency responses. To verify the closed-form expression of IMD, the analytical results are compared with the simulated results by changing frequency responses of filters in three-box model. The analytical IMDs show exact agreement with the simulated ones. The proposed analytical description can be applied to accurate PA modeling and predistortion design.
Keywords :
intermodulation distortion; network synthesis; power amplifiers; radiofrequency amplifiers; IMD; Wiener-Hammerstein type model; digital predistortion; input-output frequency responses; intermodulation distortion; nonlinear RF power amplifiers; predistortion design; three-box model; Analytical models; Closed-form solution; Intermodulation distortion; Nonlinear filters; Power amplifiers; Predistortion; RF signals; Radio frequency; Radiofrequency amplifiers; Transmitters; Intermodulation distortion; RF power amplifier; nonlinear; predistortion; three-box; two-tone;
Conference_Titel :
Microwave Conference, 2006. APMC 2006. Asia-Pacific
Conference_Location :
Yokohama
Print_ISBN :
978-4-902339-08-6
Electronic_ISBN :
978-4-902339-11-6
DOI :
10.1109/APMC.2006.4429454
