Uniform Linear Arrays With Optimized Inter-Element Spacing for LOS Massive MIMO
Journal article, 2021

In this letter, a uniform linear array (ULA) is proposed for line-of-sight massive multiple-input-multiple-output (MIMO). It is assumed that the number of antennas is fixed. For a given ULA with an arbitrary inter-element spacing, the probability that the correlation among the channel vectors of two users being above a threshold value is derived. The inter-element spacing of the proposed ULA is the one for which the aforementioned probability is minimized. To show the effectiveness of the proposed ULA, simulation results for two scenarios are given for a 64-antenna ULA that serves 6 single-antenna users. By using the proposed ULA instead of conventional half-wavelength ULA, 5th percentile sum-rate for zero-forcing precoder is improved by 9.90 bits/channel use in first scenario without dropping, and by 1.43 bits/channel use in second scenario with dropping 1 user.

Gratings

massive MIMO

zero-forcing

Apertures

Power control

uniform linear array

Correlation

Line-of-sight

MIMO communication

Antenna arrays

Author

Amirashkan Farsaei

Eindhoven University of Technology

Navid Amani

Chalmers, Electrical Engineering, Communication and Antenna Systems, Antennas

Rob Maaskant

Chalmers, Electrical Engineering, Communication and Antenna Systems

Ulf Gustavsson

Ericsson

Alex Alvarado

Eindhoven University of Technology

Frans M. J. Willems

Eindhoven University of Technology

IEEE Communications Letters

1089-7798 (ISSN)

Vol. 25 2 613-616

Silicon-based Ka-band massive MIMO antenna systems for new telecommunication services (SILIKA)

European Commission (EC), 2016-09-01 -- 2020-08-31.

Subject Categories

Telecommunications

Communication Systems

Signal Processing

DOI

10.1109/LCOMM.2020.3030681

More information

Latest update

3/17/2021