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On the Performance of Cell-Free Massive MIMO in Ricean Fading
Queens Univ Belfast, North Ireland.
Queens Univ Belfast, North Ireland.
Queens Univ Belfast, North Ireland.
Southeast Univ, Peoples R China.
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2018 (English)In: 2018 CONFERENCE RECORD OF 52ND ASILOMAR CONFERENCE ON SIGNALS, SYSTEMS, AND COMPUTERS, IEEE , 2018, p. 980-984Conference paper, Published paper (Refereed)
Abstract [en]

We consider an uplink time division duplex cell-free massive multiple input multiple output (MIMO) system in which many user equipments (UEs) are simultaneously served by many access points (APs) via simple matched filtering processing. The propagation channel is modeled via the Ricean distribution, which includes a dominant line of sight component on top of diffuse scattering. The Ricean K factor of each link varies with the UE location (relative to the locations of the AIs). The system performance in terms of the spectral efficiency is investigated taking into account imperfect channel knowledge. Power and AP weighting control is exploited to maximize the lowest spectral efficiency across all UEs. This optimization problem can be efficiently solved via the bisection method by solving a sequence of linear feasibility problems together with the generalized eigenvalue problem. We show that by optimally selecting the power control and AP weighting coefficients, the per UE throughput increases significantly. Furthermore, we propose an AP selection scheme to reduce the backhaul requirements in a cell free massive MIMO system, with slight compromise in performance.

Place, publisher, year, edition, pages
IEEE , 2018. p. 980-984
Series
Conference Record of the Asilomar Conference on Signals Systems and Computers, ISSN 1058-6393
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:liu:diva-158408DOI: 10.1109/ACSSC.2018.8645336ISI: 000467845100173ISBN: 978-1-5386-9218-9 (print)OAI: oai:DiVA.org:liu-158408DiVA, id: diva2:1332821
Conference
52nd Asilomar Conference on Signals, Systems, and Computers
Available from: 2019-06-28 Created: 2019-06-28 Last updated: 2019-06-28

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf