Title :
A novel power amplifier behavioral model for improving the linearity-efficiency tradeoff
Author :
Glock, S. ; Rascher, Jochen ; Sogl, B. ; Ussmueller, T. ; Mueller, J.-E. ; Fischer, Georg ; Weigel, Robert
Author_Institution :
Friedrich-Alexander-Univ. of Erlangen-Nuremberg, Erlangen, Germany
Abstract :
This paper focuses on a novel power amplifier (PA) semi-physical behavioral model (BM) to study the linearity-efficiency trade-off in modern wireless transmitter systems. While the behavioral models known in the literature mainly focus on the precise description of the PA nonlinearity in terms of amplitude-modulation-to-amplitude-modulation (AM-AM) and amplitude-modulation-to-phase-modulation (AM-PM) distortions, the model introduced here, also predicts the DC current flowing from the power supply to the PA. This allows to optimize the battery current while keeping the out-of-channel interference within specification limits. In a case study, the DC current and the amplitude distortions of a PA, designed for IEEE 802.11b/g/n applications are predicted with a normalized mean square error (NMSE) of -39.92 dB and -47.07 dB, respectively.
Keywords :
amplitude modulation; nonlinear network analysis; phase modulation; power amplifiers; DC current; IEEE 802.11b/g/n applications; amplitude-modulation-to-amplitude-modulation distortions; amplitude-modulation-to-phase-modulation distortions; current; linearity-efficiency tradeoff; modern wireless transmitter systems; normalized mean square error; out-of-channel interference; power amplifier nonlinearity; power amplifier semiphysical behavioral model; power supply; Computational modeling; Current measurement; Mathematical model; Power measurement; Power supplies; Predictive models; Voltage measurement;
Conference_Titel :
Microwave and RF Conference, 2013 IEEE MTT-S International
Conference_Location :
New Delhi
DOI :
10.1109/IMaRC.2013.6777718
