Multi-level LINC transmitter with nonisolated power combiner

Author

Hur, Jin ; Kim, Heonhwan ; Lee, Onyou ; Woo, Seongsu ; Kim, Kunsu ; Kim, Wonhee ; Lee, Chia-Han ; Lim, Khan ; Laskar, J.

Author_Institution

Qualcomm, San Diego, CA, USA

Volume

49

Issue

25

fYear

2013

fDate

December 5 2013

Firstpage

1624

Lastpage

1625

Abstract

By using a non-isolated power combiner, the overall power efficiency can be improved by reducing the wasted power at the combined out-phased signal. To further improve the efficiency of the low-power mode, a multi-power mode out-phasing power amplifier (PA) is proposed with load modulation by switches. Compared with the conventional linear amplification using nonlinear component (LINC) transmitter, the proposed multi-level LINC improves the power-added-efficiency more than 40% for a 7 dB peak-to-average power ratio orthogonal frequency division multiplexing signal. To the authors´ knowledge, the proposed LINC PA is the first multi-level LINC PA without multiple power supplies.

Keywords

OFDM modulation; amplification; power amplifiers; signal processing; LINC; linear amplification using the nonlinear component; load modulation; multilevel LINC transmitter; multipower mode; nonisolated power combiner; orthogonal frequency division multiplexing signal; out phased signal; power amplifier; power supplies; wasted power;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2013.3117

Filename

6678463