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Beamforming utilizing channel norm feedback in multiuser MIMO systems
KTH, School of Electrical Engineering (EES), Signal Processing. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
KTH, School of Electrical Engineering (EES), Signal Processing. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
KTH, School of Electrical Engineering (EES), Signal Processing. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0003-2298-6774
2007 (English)In: IEEE Workshop on Signal Processing Advances in Wireless Communications, IEEE , 2007, Vol. SPAWC, 1-5 p.Conference paper, Published paper (Refereed)
Abstract [en]

The problem of beamforming and rate estimation in a multi-user downlink multiple-input multiple-output (MIMO) system with limited feedback and statistical channel information at the transmitter is considered. In order to exploit the spatial properties of the channel, the norm of the channel to each receive antenna is computed. We propose to feed back the largest norm to the transmitter and derive the conditional second and fourth order channel moments in order to design the downlink beamforming weights. Similar approaches have previously been presented for multi-user multiple-input single-output (MISO) systems. Herein, these techniques are generalized to MIMO systems, by either antenna selection or receive beamforming at the receiver. Two eigenbeamforming strategies are proposed and shown to outperform opportunistic beamforming, based on similar feedback information.

Place, publisher, year, edition, pages
IEEE , 2007. Vol. SPAWC, 1-5 p.
Keyword [en]
Antenna accessories, Antennas, Beamforming, Channel estimation, Computer systems, Decoding, MIM devices, MIMO systems, Mobile telecommunication systems, Multipath propagation, Parameter estimation, Receiving antennas, Signal processing, Telecommunication, Telecommunication systems, Transmitters, Antenna selection, Channel information, Downlink beam-forming, Eigen-beamforming, Feed back, Feed back information, Fourth order, Limited feedback, Multi users, Multi-user MIMO systems, Multi-user multiple-input single-output, Multiple-input multiple-output systems, Opportunistic Beamforming, Rate estimation, Receive antennas, Receive beamforming, Spatial properties, Wireless communications, Multiplexing
National Category
Signal Processing Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-35659DOI: 10.1109/SPAWC.2007.4401371ISI: 000255431000099Scopus ID: 2-s2.0-48049091163ISBN: 978-1-4244-0955-6 (print)OAI: oai:DiVA.org:kth-35659DiVA: diva2:429424
Conference
8th IEEE Signal Processing Advances in Wireless Communications, SPAWC 2007; Helsinki
Note

© 2007 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. QC 20110704

Available from: 2011-10-26 Created: 2011-07-04 Last updated: 2013-05-07Bibliographically approved

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Ottersten, Björn

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