User selection for massive MIMO under line-of-sight propagation

Rafael S. Chaves*, Markus V. S. Lima, Ediz Cetin, Wallace A. Martins

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)
47 Downloads (Pure)

Abstract

This paper provides a review of user selection algorithms for massive multiple-input multiple-output (MIMO) systems under the line-of-sight (LoS) propagation model. Although the LoS propagation is extremely important to some promising technologies, like in millimeter-wave communications, massive MIMO systems are rarely studied under this propagation model. This paper fills this gap by providing a comprehensive study encompassing several user selection algorithms, different linear precoders and simulation setups, and also considers the effect of partial channel state information (CSI). One important result is the existence of practical cases in which the LoS propagation model may lead to significant levels of interference among users within a cell; these cases are not satisfactorily addressed by the existing user selection algorithms. Motivated by this issue, a new user selection algorithm based on inter-channel interference (ICI) called ICI-based selection (ICIBS) is proposed. Unlike other techniques, the ICIBS accounts for the ICI in a global manner, thus yielding better results, especially in cases where there are many users interfering with each other. In such scenarios, simulation results show that when compared to the competing algorithms, the proposed approach provided an improvement of at least 10.9% in the maximum throughput and 7.7% in the 95%-probability throughput when half of the users were selected.
Original languageEnglish
Pages (from-to)867-887
Number of pages21
JournalIEEE Open Journal of the Communications Society
Volume3
Early online date4 May 2022
DOIs
Publication statusPublished - 2022

Bibliographical note

Copyright the Author(s). Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

  • Massive MIMO
  • favorable propagation
  • inter-channel interference
  • line-of-sight channel
  • user selection

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