Title :
Adaptive predistortion for high power amplifier with linear dynamics
Author :
Ding, Yuanming ; Ohmori, Hiromitsu ; San, Akira
Author_Institution :
Dept. of Inf. Eng., Dalian Univ., Liaoning, China
Abstract :
The generalized Wiener-Hammerstein model (WHM) is adopted to describe the input-output relationship of high power amplifiers (HPA) with linear dynamics in OFDM systems. A power series model with memory is proposed to approximate WHM or inverse of the HPA, and adaptive predistortion for compensating nonlinearity of HPA is proposed based on identification. The effectiveness of the proposed predistortion method is validated by numerical simulation for 64QAM-OFDM systems.
Keywords :
OFDM modulation; compensation; nonlinear distortion; numerical analysis; power amplifiers; quadrature amplitude modulation; QAM-OFDM systems; Wiener-Hammerstein model; adaptive predistortion method; high power amplifier; linear dynamics; nonlinearity compensation; numerical simulation; power series model; High power amplifiers; Nonlinear distortion; Numerical simulation; OFDM; Phase distortion; Power engineering and energy; Power system modeling; Predistortion; Table lookup; Transmitters;
Conference_Titel :
Circuits and Systems, 2004. MWSCAS '04. The 2004 47th Midwest Symposium on
Print_ISBN :
0-7803-8346-X
DOI :
10.1109/MWSCAS.2004.1354306
