Linearizing Active Antenna Arrays: Digital Predistortion Method and Measurements
Brihuega Garcia, Alberto; Abdelaziz, Mahmoud; Turunen, Matias; Eriksson, Thomas; Anttila, Lauri; Valkama, Mikko (2019)
Brihuega Garcia, Alberto
Abdelaziz, Mahmoud
Turunen, Matias
Eriksson, Thomas
Anttila, Lauri
Valkama, Mikko
IEEE
2019
Proceedings 2019 IEEE MTT-S International Microwave Conference on Hardware and Systems for 5G and Beyond
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:tuni-202009307190
https://urn.fi/URN:NBN:fi:tuni-202009307190
Kuvaus
Peer reviewed
Tiivistelmä
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.
Kokoelmat
- TUNICRIS-julkaisut [16977]