Prediction of Nonlinear Distortion in Wideband Active Antenna Arrays
Artikel i vetenskaplig tidskrift, 2017

In this paper we propose a technique for comprehensive analysis of nonlinear and dynamic characteristics of multi-antenna transmitters (TXs). The analysis technique is enabled by the development of a Volterra series-based dual-input model for power amplifiers (PAs), which is capable of taking into account the joint effects of PA nonlinearity, antenna crosstalk and mismatch for wideband modulated signals. By combining multiple instances of the PA model with linear dynamic antenna simulations we develop the analysis technique. The proposed method allows the prediction of the output signal of every antenna in an arbitrarily sized TX array, as well as the total far-field radiated wave of the TX for any input signal with low computational effort. A 2.12 GHz four-element TX demonstrator based on GaAs PAs is implemented to verify simulation results with measurements. The proposed technique is a powerful tool to study hardware characteristics, as for example the effects of antenna design and element spacing. It can be used in cases where experiments are not feasible, and thus aid the development of next generation wireless systems.

multi-antenna transmitter

active antenna array

power amplifier modeling

MIMO

antenna crosstalk

mismatch

Författare

Katharina Hausmair

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Sebastian Gustafsson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Cesar Sanchez Perez

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Per Landin

Ericsson AB

Ulf Gustavsson

Ericsson AB

Thomas Eriksson

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Christian Fager

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

IEEE Transactions on Microwave Theory and Techniques

0018-9480 (ISSN)

Vol. 65 11 4550-4563

Styrkeområden

Informations- och kommunikationsteknik

Nanovetenskap och nanoteknik

Ämneskategorier

Kommunikationssystem

Signalbehandling

DOI

10.1109/TMTT.2017.2699962

Mer information

Senast uppdaterat

2018-09-20