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Nonlinear Distortion Analysis of Polar Transmitters

Pedro, J. C. ; Garcia, J. A. ; Cabral, P. M.

IEEE Trans. on Microwave Theory and Tech. Vol. 55, Nº 12, pp. 2757 - 2765, December, 2007.

ISSN (print): 0018-9480
ISSN (online): 0018-9480

Journal Impact Factor: 2,711 (in 2008)

Digital Object Identifier: 10.1109/TMTT.2007.909145

Abstract
This paper gives a comprehensive analysis of the
major nonlinear distortion generation mechanisms present in modern wireless polar transmitters. Based on a simplified description of the physical operation of voltage supply modulated switching mode power amplifiers, it derives an analytical model of both the AM-AM and AM-PM distortions usually encountered on polar transmitters excited by the standard two-tone excitation. Extensive nonlinear measurement and simulation results made on a real power amplifier circuit of a polar transmitter architecture validate the proposed analytical
distortion model.