Single Digital Predistortion Technique for Phased Array Linearization
Paper i proceeding, 2019

In this paper, we present a novel and effective linearization technique for nonlinear phased array antennas. For large phased arrays, linearization of the array using a single digital predistortion (DPD) is inevitable since one digital path is upconverted and feeds several RF transmission paths, each of which is connected to a power amplifier (PA) and an antenna element. However, a critical issue is that the PA characteristics can vary considerably within an array. Thus, linearizing individual PAs with one DPD is rather challenging. We formulate and solve an optimization problem that corresponds to jointly minimizing the maximum residuals between the input to the array and the output of individual PAs. We demonstrate that the proposed technique outperforms state-of-the-art linearization solutions while retaining the linear gain of the array.

MIMO

phased array

digital predistortion

linearization

single DPD

Författare

Sara Hesami

Maynooth University

Sina Rezaei Aghdam

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

Christian Fager

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik, Mikrovågselektronik

Thomas Eriksson

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

Ronan Farrell

Maynooth University

John Dooley

Maynooth University

2019 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS)

0271-4302 (ISSN)

2019 IEEE International Symposium on Circuits and Systems (ISCAS)
Sapporo, Japan,

Ämneskategorier

Beräkningsmatematik

Signalbehandling

Diskret matematik

DOI

10.1109/ISCAS.2019.8702811

ISBN

9781728103976

Mer information

Senast uppdaterat

2019-11-11