Title :
Adaptive Nonlinearity Compensation for Power Amplifiers Based on Model-Matching Approach
Author :
Yuanming Ding ; Sano, Akihide
Author_Institution :
Univ. Key Lab. of Inf. Sci. & Eng., Dalian Univ., Liaoning, China
Abstract :
A new time-domain adaptive linearization scheme is presented for compensating nonlinearity of high power amplifiers (HPA) in OFDM systems. A power series model with memory (PSMWM) is proposed to approximately describe the nonlinear input-output relation of HPA with dynamics. By using the PSMWM, the compensation input to HPA is calculated in a real-time manner so that the linearization from the predistorter (nonlinearity compensator) input to the HPA output can be attained even if the nonlinear dynamics of HPA is uncertain and changeable. The effectiveness of the proposed adaptive nonlinearity compensation scheme is validated in numerical simulation for 64-ary quadrature amplitude modulation OFDM (64QAM-OFDM) transmission systems.
Keywords :
OFDM modulation; compensation; linearisation techniques; power amplifiers; time-domain analysis; OFDM systems; adaptive nonlinearity compensation; high power amplifiers; model-matching; power series model; predistorter; time-domain adaptive linearization; Adaptive control; High power amplifiers; Inverse problems; Nonlinear distortion; OFDM; Power amplifiers; Power engineering and energy; Power system modeling; Predistortion; Programmable control; Adaptive Compensation; Identification; Linearization; Power Amplifier (PA);
Conference_Titel :
Control Conference, 2006. CCC 2006. Chinese
Conference_Location :
Harbin
Print_ISBN :
7-81077-802-1
DOI :
10.1109/CHICC.2006.280802
