Linearizing Active Antenna Arrays: Digital Predistortion Method and Measurements
Paper i proceeding, 2019

In this paper, we provide a novel framework for efficient digital predistortion (DPD) based linearization of active antenna arrays with multiple and mutually different nonlinear power amplifiers. The proposed method builds on the use of a combined feedback signal essentially characterizing the observable nonlinear distortion at the receiving end. The proposed method is validated with extensive over-the-air RF measurements on a 64-element active antenna array transmitter operating at 28 GHz carrier frequency and transmitting a 200 MHz wide 5G New Radio (NR) waveform. The obtained results demonstrate the excellent linearization capabilities of the proposed solution, which allows for a very efficient implementation in practical systems.

power amplifiers

millimeter-waves

phased arrays

digital predistortion

5G NR

RF measurements

Författare

Alberto Brihuega

Tampereen Yliopisto

Mahmoud Abdelaziz

Tampereen Yliopisto

Matias Turunen

Tampereen Yliopisto

Thomas Eriksson

Chalmers, Elektroteknik

Lauri Anttila

Tampereen Yliopisto

M. Valkama

Tampereen Yliopisto

2019 IEEE MTT-S International Microwave Conference on Hardware and Systems for 5G and Beyond, IMC-5G 2019

9160379

2019 IEEE MTT-S International Microwave Conference on Hardware and Systems for 5G and Beyond, IMC-5G 2019
Atlanta, USA,

Ämneskategorier

Telekommunikation

Signalbehandling

Annan elektroteknik och elektronik

DOI

10.1109/IMC-5G47857.2019.9160379

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Senast uppdaterat

2020-10-16