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2005
Conference Paper
Titel
EDGE transmitter with commercial GSM power amplifier using polar modulation with memory predistortion
Abstract
In this paper a polar GSM/EDGE transmitter is introduced, which uses an off-the-shelf GMSK PA as a non-linear high-efficient amplifier, thereby only minor modifications of the analog RF circuit compared to a 2G GSM mobile are necessary. An adaptation of frequency dependent group delay in the phase path minimizes amplitude modulation bandwidth requirements. Employing a memory predistorter, -61 dBc ACPR (Adjacent Channel Power Ratio) was achieved.