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Improved Multi user Diversity Using Smart Antennas with Limited Feedback
KTH, School of Electrical Engineering (EES), Signal Processing.
KTH, School of Electrical Engineering (EES), Signal Processing.ORCID iD: 0000-0002-3599-5584
KTH, School of Electrical Engineering (EES), Signal Processing.ORCID iD: 0000-0003-2298-6774
2005 (English)In: Proceedings European Signal Processing Conference, EUSIPCO 2005, 2005, 1359-1362 p.Conference paper, Published paper (Refereed)
Abstract [en]

Multiuser divversity and beamforming are two techniques that promise dramatically increased system throughput and spectral ef- ficiency. In most systems it has however been considered infeasible to utilize spatial channel information, due to the increased feedback load. In order to exploit the benefits of both multiuser divversity and beamforming, we show how to compute the second order channel statistics, conditioned on the norm of the current channel realization. The conditional channel statistics allow for elaborate scheduling and smart antenna techniques, with limited feedback. Herein, the downlink of a single cell multiple-input singleoutput (MISO) system is considered. Only the current signal to noise ratio (SNR) is fed back from the mobile stations, whereas the second order channel statistics can be estimated at the base station from information collected in the uplink. A simple scheduling/eigenbeamforming scheme is proposed and shown to outperform opportunistic beamforming, which is a technique with similar feedback.

Place, publisher, year, edition, pages
2005. 1359-1362 p.
Keyword [en]
Multiuser divversity, beamforming, spatial channel information, feedback, multiple-input singleoutput (MISO) system, signal to noise ratio (SNR)
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-46590Scopus ID: 2-s2.0-84863646340ISBN: 978-160423821-1 (print)OAI: oai:DiVA.org:kth-46590DiVA: diva2:453922
Conference
European Signal Processing Conference, EUSIPCO 2005. Antalya, Turkey. 4-8 September 2005.
Note

QC 20111107

Available from: 2011-11-03 Created: 2011-11-03 Last updated: 2014-09-23Bibliographically approved

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Bengtsson, MatsOttersten, Björn

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • 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