Prediction of Nonlinear Distortion in Wideband Active Antenna Arrays
Journal article, 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

Author

Katharina Hausmair

Chalmers, Signals and Systems, Communication and Antenna Systems, Communication Systems

Sebastian Gustafsson

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Cesar Sanchez Perez

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Per Landin

Ericsson AB

Ulf Gustavsson

Ericsson AB

Thomas Eriksson

Chalmers, Signals and Systems, Communication and Antenna Systems, Communication Systems

Christian Fager

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

IEEE Transactions on Microwave Theory and Techniques

0018-9480 (ISSN)

Vol. 65 11 4550-4563

Areas of Advance

Information and Communication Technology

Nanoscience and Nanotechnology (2010-2017)

Subject Categories

Communication Systems

Signal Processing

DOI

10.1109/TMTT.2017.2699962

More information

Latest update

9/20/2018