An Efficient Combination of Digital Predistortion and OFDM Clipping for Power Amplifiers

被引：10

作者：

Gilabert, Pere L. ^{[1
]}

Gadringer, Michael E. ^{[2
]}

Montoro, Gabriel ^{[1
]}

Mayer, Markus L. ^{[2
]}

Silveira, Daniel D. ^{[2
]}

Bertran, Eduard ^{[1
]}

Magerl, Gottfried ^{[2
]}

机构：

[1] Tech Univ Catalonia UPC, Dept Signal Theory & Commun, Barcelona 08860, Spain

[2] Vienna Univ Technol, Inst Elect Measurements & Circuit Design, A-1040 Vienna, Austria

来源：

INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING | 2009年 / 19卷 / 05期

关键词：

digital predistortion; nonlinear distortion; OFDM; peak-to-average power ratio (PAPR); reduction; power amplifiers; REDUCTION;

D O I：

10.1002/mmce.20381

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

This article presents a strategy for enhancing efficiency in power amplifiers (PAs) by combining digital predistortion (DPD) linearization and clipping strategies for orthogonal frequency division multiplexing signals in a WiMAX scenario. On the one hand, by reducing the peak-to-average power ratio of multicarrier signals using the well-known clipping technique, it is possible to perform a more efficient PA amplification. On the other hand, nonlinear and linear distortion introduced by the PA operating close to saturation is compensated by the baseband adaptive DPD linearizer. The DPD has to counteract not only the PA nonlinear behavior, but also its dynamics. A test-bench implementing a WiMAX transmitter was deployed to evaluate the possibilities for enhancing power efficiency while fulfilling the demanded linearity requirements. Experimental results showing the power efficiency and linearity enhancement achieved by the proposed strategy are provided. (C) 2009 Wiley Periodicals, Inc. Int J RF and Microwave CAE 19: 583-591, 2009.

引用

页码：583 / 591

页数：9

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