Amplitude Varying Phased Array Linearization
Paper in proceeding, 2021

A new optimization technique for amplitude-varying phased array digital predistortion (DPD) is presented. The new technique improves the linearization compared to the conventional phased array DPD techniques as the amplitude variation increases across the array. The measurement results indicate that linearization can change the adjacent channel power (ACP) pattern leading to increased ACP in the sidelobes. This sheds light on the trade-off between the main beam and side-lobes levels in the ACP pattern under different DPD techniques. We evaluate total radiated ACP or integrated ACP (IACP) and peak of ACP (PACP). We show that slight amplitude variation improves the IACP and PACP. However, as the amplitude variation increases, IACP of phased array with DPD is worsened compared to phased array without DPD.

digital predistortion

power amplifiers

phased array

ACP

Author

Sara Hesami

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Sina Rezaei Aghdam

Chalmers, Electrical Engineering, Communication and Antenna Systems, Communication Systems

John Dooley

Maynooth University

Thomas Eriksson

Chalmers, Electrical Engineering, Communication and Antenna Systems, Communication Systems

Christian Fager

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

2020 50th European Microwave Conference, EuMC 2020

348-351 9338037

50th European Microwave Conference, EuMC 2020
Utrecht, Netherlands,

Subject Categories

Accelerator Physics and Instrumentation

Signal Processing

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.23919/EuMC48046.2021.9338037

More information

Latest update

8/3/2021 9