论文信息 - EDGE transmitter with commercial GSM power amplifier using polar modulation with memory predistortion

EDGE transmitter with commercial GSM power amplifier using polar modulation with memory predistortion

Polar transmitters amplify non-constant envelope signals with high power efficiency. Thus they are especially advantageous for battery-powered wireless equipment. 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.

G. Ulbricht | G. Seegerer

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