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Layered random beamforming OFDMA with fair scheduling algorithms

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

Original languageEnglish
Title of host publicationIEEE Vehicular Technology Conference, 2008 (VTC Spring 2008) , Singapore
Publisher or commissioning bodyInstitute of Electrical and Electronics Engineers (IEEE)
Pages1097 - 1101
Number of pages5
ISBN (Print)9781424416448
StatePublished - May 2008
EventVehicular Technology Conference 2008 - Singapore, Singapore

Publication series

ISSN (Print)15502252


ConferenceVehicular Technology Conference 2008
Abbreviated titleVTC 2008-Spring
Period1/05/08 → …


This paper presents performance analysis of layered random beamforming (LRB) - MIMO-OFDMA employing various resource scheduling algorithms with feedback reduction in a realistic outdoor environment. LRB enables the exploitation of spatial multi-user diversity gain, spatial multiplexing capacity gain and layer spatial multi-user diversity gain, which is achieved by enabling the multiplex of data transmitted simultaneously to different destinations. Unlike a conventional beamforming system, an LRB system only requires an effective signal to interference and noise ratio (ESINR) based numerical data rate as feedback from every spatial layer of the MIMO channel and thus has potentially lower feedback requirements than a system which requires feedback of more detailed channel information. By combining the LRB technique with OFDMA, LRB-OFDMA can achieve an additional spectral multi-user diversity gain compared to the single carrier LRB system. Various scheduling algorithms are proposed for LRB-OFDMA and they show a trade-off between maintaining fairness and minimising delay. The performance of LRB-OFDMA is evaluated using some well-established statistical channel models as well as a propagation modeling tool, which represents a realistic outdoor environment

Additional information

Name and Venue of Event: IEEE Vehicular Technology Conference, 2008 (VTC Spring 2008) , Singapore Rose publication type: Conference contribution Additional information: With accompanying conference poster Sponsorship: The authors wish to acknowledge the financial support of Dorothy Hodgkin Postgraduate Awards (DHPA) and Toshiba Research Europe Limited (TREL) Terms of use: Copyright © 2008 IEEE. Reprinted from IEEE Vehicular Technology Conference, Spring 2008 (VTC Spring 2008). 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 the University of Bristol'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 By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

    Research areas

  • layered random beam forming, MIMO-OFDMA, multi-user diversity, scheduling algorithm


Vehicular Technology Conference 2008

Abbreviated titleVTC 2008-Spring
Duration1 May 2008 → …

Event: Conference

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