Title :
A fully digital polar modulator for switch mode RF power amplifier
Author :
Ostrovskyy, Philip ; Scheytt, Christoph ; Lee, SungJun ; Park, Bonghyuk ; Jung, Jaeho
Author_Institution :
IHP GmbH, Frankfurt (Oder), Germany
Abstract :
In this paper, a novel fully digital modulator for a switch mode power amplifier (SMPA) is presented. The modulator converts the input baseband amplitude and phase signals into a two-level pulse train for driving an RF SMPA. The simulation results demonstrated a proof of the concept. The proposed architecture is analyzed in terms of accuracy by measuring EVM. The impact of the modulator parameters on the SMPA performance is investigated and corresponding results are shown. The modulator was simulated with a 20 MHz LTE signal.
Keywords :
power amplifiers; switched mode power supplies; EVM; LTE signal; RF SMPA; SMPA performance; baseband amplitude; frequency 20 MHz; fully digital polar modulator; modulator parameter; phase signal; switch mode RF power amplifier; two-level pulse train; Computer architecture; Encoding; Frequency modulation; Power amplifiers; Radio frequency; Switches;
Conference_Titel :
Circuits and Systems (ISCAS), 2012 IEEE International Symposium on
Conference_Location :
Seoul
Print_ISBN :
978-1-4673-0218-0
DOI :
10.1109/ISCAS.2012.6271777
