A Tuning Technique for Temperature and Process Variation Compensation of Power Amplifiers with Digital Predistortion

Radio frequency (RF) power amplifiers (PAs) are the most power consuming and inefficient devices in RF transceiver systems and are often integrated with performance enhancement techniques such as digital predistortion (DPD). However, the performance of the integrated system (PA with DPD) is signific...

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Bibliographic Details
Published in2016 IEEE 25th North Atlantic Test Workshop (NATW) pp. 38 - 45
Main Authors Chauhan, Hari, Kvartenko, Vlad, Onabajo, Marvin
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.05.2016
Subjects
Baseband
digital predistortion
digitally-assisted radio frequency circuits
Linearity
power amplifier
Predistortion
Radio frequency
radio frequency transceiver
Temperature
Tuning
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Summary:Radio frequency (RF) power amplifiers (PAs) are the most power consuming and inefficient devices in RF transceiver systems and are often integrated with performance enhancement techniques such as digital predistortion (DPD). However, the performance of the integrated system (PA with DPD) is significantly impacted by temperature drift and process variations and thus it is essential to have a tuning mechanism that compensates for these variations. This paper presents the idea for a novel tuning technique that incorporates a digital-to-analog converter (DAC) in the integrated system (PA with DPD) to utilize the error signal generated by the digital predistortion technique to automatically tune the power amplifier's bias voltage for optimal performance. To evaluate the proposed tuning mechanism, simulation results from a closed-loop system consisting of an inverted Doherty power amplifier with digital predistortion integrated are presented.
DOI:10.1109/NATW.2016.12