On the Performance of Cell-Free Massive MIMO in Ricean Fading (Invited Paper)

Hien Quoc Ngo, Harsh Tataria, Michail Matthaiou, Erik G. Larsson, Shi Jin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

16 Citations (Scopus)
235 Downloads (Pure)

Abstract

We consider a time-division duplex cell-free massive MIMO system in which many multiple-antenna users are simultaneously served by many multiple-antenna access points (APs) via simple maximum-ratio processing. Unlike legacy cellular systems, the propagation channel in cell-free systems likely to have considerably higher line-of-sight (LOS) probability to each user. Thus, in this work, the propagation channel is modeled via the Ricean distribution, which includes a LOS component plus a non-LOS component. The Ricean K-factors vary with the geometrical locations of the users relative with the locations of the APs. The system performance in terms of the achievable rate is investigated taking into account imperfect channel knowledge. In addition, power control and access point selection schemes are proposed to improve the performance, as well as, to reduce the backhaul requirements in cell-free massive MIMO systems.
Original languageEnglish
Title of host publicationIEEE International Conference on Signals, Systems, and Computers 2018 (IEEE ASILOMAR): Proceedings
Place of PublicationPalo Aalto, CA, USA
Pages980-984
Number of pages6
ISBN (Electronic)978-1-5386-9218-9
DOIs
Publication statusPublished - 21 Feb 2019

Publication series

Name
ISSN (Print)2576-2303

Keywords

  • Cell-free massive MIMO
  • Conjugate beamforming
  • LOS components
  • Ricean fading
  • Time-division duplexing

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