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On convergence properties of joint optimal power control and transmit-receive beamforming in multi-user MIMO systems
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
2006 (English)In: 2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications, NEW YORK: IEEE , 2006, 234-238 p.Conference paper, Published paper (Refereed)
Abstract [en]

We consider SDMA in a multi-user downlink MIMO system with several access points, each serving one or more users. The problem of minimizing the total transmitted power satisfying the SINR requirements at all users is considered. This is a non-linear and non-convex optimization problem with three sets of variables: the transmitter powers, the transmitter weights and the receiver weights. Global system knowledge will be assumed at the access points and the provided results can be seen as benchmarks in system performance. We present a new initialization strategy and investigate its convergence behavior for a proposed algorithm. A numerical study is performed to analyze the dependence of the target SINRs on the optimal solution. The performance of this initialization process is evaluated and compared to an existing beamforming algorithm.

Place, publisher, year, edition, pages
NEW YORK: IEEE , 2006. 234-238 p.
Keyword [en]
SDMA, multi-user MIMO systems, multi-user downlink MIMO system, nonconvex optimization problem, optimal power control, transmit-receive beamforming
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-34949DOI: 10.1109/SPAWC.2006.346345ISI: 000246147200048Scopus ID: 2-s2.0-48749110871OAI: oai:DiVA.org:kth-34949DiVA: diva2:427429
Conference
7th IEEE Workshop on Signal Processing Advances in Wireless Communications Cannes, FRANCE, JUL 02-05, 2006
Note
QC 20110628Available from: 2011-06-28 Created: 2011-06-17 Last updated: 2012-01-23Bibliographically approved

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Bengtsson, MatsOttersten, Björn

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CiteExportLink to record
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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
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