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Channel norm-based user scheduler in coordinated multi-point systems
Beihang University, Beijing, China.
Beihang University, Beijing, China.
KTH, School of Electrical Engineering (EES), Signal Processing. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0002-3599-5584
University Polit`ecnica de Catalunya Barcelona, Spain.
2009 (English)In: GLOBECOM - IEEE Global Telecommunications Conference, 2009Conference paper (Refereed)
Abstract [en]

In this paper, we address the problem of user scheduling in downlink coordinated multi-point transmission (CoMP) systems, where multiple users are selected and then served with zero forcing beamformer simultaneously by several cooperative base stations (BSs). To reduce the enormous overhead led by obtaining full channel state information at the transmitter, a low-feedback user scheduling method called channel norm-based user scheduler (NUS), is proposed by exploiting the asymmetric channel feature of CoMP systems. Simulation results show that the channel norm provides sufficient information for user scheduling when each BS has one antenna, where the performance gap between the NUS and the greedy user selection (GUS) is negligible with respect to both the cell average throughput and the cell edge throughput. When each BS has multiple antennas, NUS is inferior to GUS, but still significantly outperforms the uncoordinated systems.

Place, publisher, year, edition, pages
, IEEE Global Telecommunications Conference (Globecom), ISSN 1930-529X
Keyword [en]
Asymmetric channel, Beam formers, Cell averages, Cell edges, Channel state information at the transmitters, Multiple antenna, Multiple user, Simulation result, User scheduling, User selection, Zero-forcing, Antennas, Bioinformatics, Feedback, State feedback, Scheduling
National Category
URN: urn:nbn:se:kth:diva-35653DOI: 10.1109/GLOCOM.2009.5425711ISI: 000280579101204ScopusID: 2-s2.0-77951534696ISBN: 9781424441488OAI: diva2:429571
2009 IEEE Global Telecommunications Conference, GLOBECOM 2009. Honolulu. NOV 30-DEC 04, 2009
QC 20110705 QC 20111107Available from: 2011-07-05 Created: 2011-07-04 Last updated: 2011-11-07Bibliographically approved

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Bengtsson, Mats
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Signal ProcessingACCESS Linnaeus Centre

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