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On the Impact of PA-Induced In-Band Distortion in Massive MIMO
Linköping University, Department of Electrical Engineering, Communication Systems. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-2093-5466
Linköping University, Department of Electrical Engineering, Communication Systems. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-7599-4367
Chalmers University of Technology, Gothenburg, Sweden.
2014 (English)In: Proceedings of European Wireless 2014, Berlin, Offenbach, Germany: VDE Verlag GmbH, 2014, 201-206 p.Conference paper, Published paper (Refereed)
Abstract [en]

Conventional downlink signals in massive MIMO suffer from high PAR, which requires the power amplifiers of the base station to be backed off to avoid signal distortion, which lowers power efficiency. To improve efficiency, there are precoding schemes that produce signals with low PAR. To compare different precoding schemes, this article estimates their power consumptions through simulations, in which in-band distortion and amplifier efficiency effects are taken into consideration. It is found that, when only in-band distortion and the data rate requirement determine the back-off, the inband distortion is negligible and the power amplifiers can be operated at peak efficiency. It also turns out that low-PAR and conventional, high-PAR, precoding schemes consume approximately the same amount of power when the out-of-band part of the distortion is disregarded.

Place, publisher, year, edition, pages
Berlin, Offenbach, Germany: VDE Verlag GmbH, 2014. 201-206 p.
Keyword [en]
massive MIMO; multiuser precoding, crest-factor reduction, low-PAR precoding
Keyword [sv]
massiv MIMO, fleranvändarförkodning, toppvärdesreducering, lågtoppvärdesförkodning
National Category
Communication Systems
Identifiers
URN: urn:nbn:se:liu:diva-112395ISBN: 978-3-8007-3621-8 (print)OAI: oai:DiVA.org:liu-112395DiVA: diva2:765917
Conference
20th European Wireless Conference, 14-16 May 2014, Barcelona, Spain
Available from: 2014-11-25 Created: 2014-11-25 Last updated: 2016-08-31Bibliographically approved

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Mollén, ChristopherLarsson, Erik G.

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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