Title :
Mixed-signal Simulation of a Power Amplifier Predistortion Linearization System
Author :
Woo, Wangmyong ; Kenney, J. Stevenson
Author_Institution :
School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0250, USA, Tel: (404) 385-2303; wmwoo@ece.gatech.edu
Abstract :
This paper introduces a mixed-signal simulator for the RF power amplifier predistortion linearization. System-level simulation approaches are in demand for designing mixed-signal power amplifier systems and tight time-to-market requirements. A predistortion system using self-adjusting function provides both precise and stable distortion compensation performance. The system performs the linearization for a physical model of a power amplifier (PA) using the dynamic feedback of the difference signal between input and output envelops to adaptively compensate the gain and phase. The simulator was developed on the simulation environment in the HP Advanced Design System (HP ADS). The performance of the simulator is examined by a mixed-signal example. The presented performance illustrates potential applications for DSP implementation in the future wireless systems.
Keywords :
Circuit simulation; Computational modeling; Computer simulation; Linearization techniques; Power amplifiers; Power engineering and energy; Power system modeling; Predistortion; Radiofrequency amplifiers; Table lookup;
Conference_Titel :
ARFTG Conference Digest-Fall, 58th
Conference_Location :
San Diego, CA, USA
Print_ISBN :
0-7803-5686-1
DOI :
10.1109/ARFTG.2001.327489
