Linearizing Active Antenna Arrays: Digital Predistortion Method and Measurements
Paper in proceedings, 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

Author

Alberto Brihuega

University of Tampere

Mahmoud Abdelaziz

University of Tampere

Matias Turunen

University of Tampere

Thomas Eriksson

Chalmers, Electrical Engineering

Lauri Anttila

University of Tampere

M. Valkama

University of Tampere

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,

Subject Categories

Telecommunications

Signal Processing

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/IMC-5G47857.2019.9160379

More information

Latest update

10/16/2020