Joint Linearity and Efficiency Improvement for a High Power Amplifier

Author

Brandon, Mathilde ; Ariaudo, Myriam ; Traverso, Stefano ; Bouvier, Jessica ; Gautier, Jean-Luc ; Fijalkow, Inbar

Author_Institution

ETIS Lab., Cergy-Pontoise Univ., Cergy, France

Volume

24

Issue

12

fYear

2014

fDate

Dec. 2014

Firstpage

884

Lastpage

886

Abstract

This letter presents the optimized way to combine predistortion and envelope tracking to improve at the same time the linearity and efficiency performances of an emitter. Applied to a realistic GaN (Gallium Nitride) Power Amplifier (PA) with a highly dynamic Orthogonal Frequency Division Multiplexing (OFDM) signal, the processing allows obtaining an improvement of 20 dB in terms of out-of-band linearity and simultaneously the efficiency is improved by a factor of 1.7 to 3 in the simulated power range. We analyze the performances of the proposed techniques association as a function of the power, showing its robustness.

Keywords

OFDM modulation; power amplifiers; GaN; PA; dynamic OFDM signal; efficiency improvement; envelope tracking; high power amplifier; linearity improvement; orthogonal frequency division multiplexing signal; predistortion; simulated power range; Bit error rate; Gallium nitride; Linearity; OFDM; Optimization; Predistortion; Wireless communication; Digital predistortion (DPD); efficiency; envelope tracking (ET); in-band and out-of-band linearity performance; multicarriers signal;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2014.2361665

Filename

6924780