Layered random beamforming OFDMA with fair scheduling algorithms

C Han, SMD Armour, A Doufexi, JP McGeehan, Y Sun

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

3 Citations (Scopus)
384 Downloads (Pure)


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
Translated title of the contributionLayered random beamforming OFDMA with fair scheduling algorithms
Original languageEnglish
Title of host publicationIEEE Vehicular Technology Conference, 2008 (VTC Spring 2008) , Singapore
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages1097 - 1101
Number of pages5
ISBN (Print)9781424416448
Publication statusPublished - May 2008
EventVehicular Technology Conference 2008 - Singapore, Singapore
Duration: 1 May 2008 → …

Publication series

ISSN (Print)15502252


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

Bibliographical note

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).

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  • layered random beam forming
  • multi-user diversity
  • scheduling algorithm

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