A System-Performance-Based Comparison of Sparse Regular and Irregular Antenna Arrays for Millimeter-Wave Multi-User MIMO Base Stations
Artikel i vetenskaplig tidskrift, 2022

A system-level study was conducted that evaluated the system performance of various dense and sparse antenna array configurations for application in millimeter-wave multi-user multiple-input multiple-output base stations. The performance was evaluated by investigating the probability that a user experiences an outage when a zero-forcing pre-coder is used in a random line of sight scenario. This paper shows that the outage probability significantly decreased when irregular sparse arrays were used rather than regular sparse or regular dense arrays. A re-configurable linear array was designed and realized as a demonstrator. It used 3D-printed aluminum box horn antenna elements that had wide scanning range in the azimuthal plane and a small scanning range in the elevation plane. For the demonstrator, it was shown that the outage probability was reduced from 3.85% to 0.64% by moving from a sparse regularly spaced array to a sparse randomly spaced array. This amounted to an improvement of a factor of six. The sparse topology allowed for the usage of large antenna elements that had an increased gain and still achieved wide-angle scanning, while reducing mutual coupling to a minimum.

Antenna arrays



Sparse arrays

Base stations




R. X.F. Bude

Technische Universiteit Eindhoven

Thomas A.H. Bressner

Ericsson Antenna Technology Germany GmbH

Martin Johansson

Ericsson AB

Marianna Ivashina

Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk, Antennsystem

A. B. Smolders

Technische Universiteit Eindhoven

U. Johannsen

Technische Universiteit Eindhoven

Electronics (Switzerland)

20799292 (eISSN)

Vol. 11 3 335







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