Efficient user selection algorithms for wireless broadcast channels

Arif Khan*, Rein Vesilo, Iain B. Collings

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

10 Citations (Scopus)
24 Downloads (Pure)

Abstract

This paper considers wireless broadcast systems with multi-antenna base stations. Precoding at the transmitter reduces interference between users allowing independent data streams to be sent to multiple users simultaneously. With typically more users than transmit antennas, efficient selection of user subsets is important. The paper compares the effectiveness of several user selection algorithms and identifies situations where they are suboptimal. The impact of zero-forcing (ZF) and dirty paper coding (DPC) precoding are considered. A modification to two current algorithms is proposed that reduces computational time while retaining effectiveness. Simulation is used to assess the modifications and suggest methods of setting parameters. The paper examines the variability of allocated data rates and shows how it affects the performance of weighted alpha rule schedulers, which trade-off efficiency with fairness. It is shown that reducing the variability of allocated rates can have a significant reduction on mean scheduler queue sizes.

Original languageEnglish
Title of host publicationThe 2nd International Conference on Wireless Broadband and Ultra Wideband Communications, AusWireless 2007
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages1-6
Number of pages6
ISBN (Print)0769528422, 9780769528427
DOIs
Publication statusPublished - 2007
Event2nd International Conference on Wireless Broadband and Ultra Wideband Communications, AusWireless 2007 - Sydney, Australia
Duration: 27 Aug 200730 Aug 2007

Other

Other2nd International Conference on Wireless Broadband and Ultra Wideband Communications, AusWireless 2007
CountryAustralia
CitySydney
Period27/08/0730/08/07

Bibliographical note

Copyright 2007 IEEE. Reprinted from Proceedings of the 2nd international conference on wireless broadband and ultra wideband communications (AusWireless 2007). This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Macquarie University’s products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

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