Novel digital compensation approaches for envelope tracking amplifiers

Atso Hekkala; Adrian Kotelba; Mika Lasanen; Pertti Järvensivu; Aarne Mämmelä

doi:10.1007/s11277-010-0038-0

Novel digital compensation approaches for envelope tracking amplifiers

Atso Hekkala (Corresponding Author), Adrian Kotelba, Mika Lasanen, Pertti Järvensivu, Aarne Mämmelä

Research output: Contribution to journal › Article › Scientific › peer-review

4 Citations (Scopus)

Abstract

This paper considers the compensation of the envelope tracking (ET) amplifier. In particular, we propose a new predistortion architecture for the ET amplifier. In addition, we develop new algorithms for time misalignment compensation between the input signals of the ET amplifier and compare the methods to a previously presented method. Our results indicate that using the proposed architecture with optimal predistorter, we achieve over 40 dB better adjacent channel power than using a previously presented architecture. In addition, the time misalignment compensation methods give very accurate timing estimates. The time misalignment compensation with the predistortion reduces spectral regrowth due to the nonlinear ET amplifier and improves the power efficiency of the ET amplifier.

Original language	English
Pages (from-to)	55-77
Journal	Wireless Personal Communications
Volume	62
Issue number	1
DOIs	https://doi.org/10.1007/s11277-010-0038-0
Publication status	Published - 2012
MoE publication type	A1 Journal article-refereed

Keywords

Adaptive compensation
Polynomial predistorter
Predistorter architecture
Time misalignment

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10.1007/s11277-010-0038-0

https://publications.vtt.fi/julkaisut/muut/2012/OA-Novel_Digital.pdf

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title = "Novel digital compensation approaches for envelope tracking amplifiers",

abstract = "This paper considers the compensation of the envelope tracking (ET) amplifier. In particular, we propose a new predistortion architecture for the ET amplifier. In addition, we develop new algorithms for time misalignment compensation between the input signals of the ET amplifier and compare the methods to a previously presented method. Our results indicate that using the proposed architecture with optimal predistorter, we achieve over 40 dB better adjacent channel power than using a previously presented architecture. In addition, the time misalignment compensation methods give very accurate timing estimates. The time misalignment compensation with the predistortion reduces spectral regrowth due to the nonlinear ET amplifier and improves the power efficiency of the ET amplifier.",

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AU - Hekkala, Atso

AU - Kotelba, Adrian

AU - Lasanen, Mika

AU - Järvensivu, Pertti

AU - Mämmelä, Aarne

PY - 2012

Y1 - 2012

N2 - This paper considers the compensation of the envelope tracking (ET) amplifier. In particular, we propose a new predistortion architecture for the ET amplifier. In addition, we develop new algorithms for time misalignment compensation between the input signals of the ET amplifier and compare the methods to a previously presented method. Our results indicate that using the proposed architecture with optimal predistorter, we achieve over 40 dB better adjacent channel power than using a previously presented architecture. In addition, the time misalignment compensation methods give very accurate timing estimates. The time misalignment compensation with the predistortion reduces spectral regrowth due to the nonlinear ET amplifier and improves the power efficiency of the ET amplifier.

AB - This paper considers the compensation of the envelope tracking (ET) amplifier. In particular, we propose a new predistortion architecture for the ET amplifier. In addition, we develop new algorithms for time misalignment compensation between the input signals of the ET amplifier and compare the methods to a previously presented method. Our results indicate that using the proposed architecture with optimal predistorter, we achieve over 40 dB better adjacent channel power than using a previously presented architecture. In addition, the time misalignment compensation methods give very accurate timing estimates. The time misalignment compensation with the predistortion reduces spectral regrowth due to the nonlinear ET amplifier and improves the power efficiency of the ET amplifier.

KW - Adaptive compensation

KW - Polynomial predistorter

KW - Predistorter architecture

KW - Time misalignment

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EP - 77

JO - Wireless Personal Communications

JF - Wireless Personal Communications

IS - 1

ER -

Novel digital compensation approaches for envelope tracking amplifiers

Abstract

Keywords

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