Linearizing Active Antenna Arrays: Digital Predistortion Method and Measurements

被引：0

作者：

Brihuega, Alberto ^{[1
]}

Abdelaziz, Mahmoud ^{[1
]}

Turunen, Matias ^{[1
]}

Eriksson, Thomas ^{[2
]}

Anttila, Lauri ^{[1
]}

Valkama, Mikko ^{[1
]}

机构：

[1] Tampere Univ, Dept Elect Engn, Tampere, Finland

[2] Chalmers Univ Technol, Dept Elect Engn, Gothenburg, Sweden

来源：

2019 IEEE MTT-S INTERNATIONAL MICROWAVE CONFERENCE ON HARDWARE AND SYSTEMS FOR 5G AND BEYOND (IMC-5G) | 2019年

关键词：

5G NR; digital predistortion; millimeter-waves; phased arrays; power amplifiers; RF measurements; MIMO;

D O I：

10.1109/imc-5g47857.2019.9160379

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

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.

引用

页数：3

共 9 条

[1] Digital Predistortion for Hybrid MIMO Transmitters [J].