Multi- User MIMO Broadcast Systems With Imperfect Feedbacks

Li-Chun Wang, Chu Jung Yeh

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

In this paper, we investigate the impact of imperfect feedback on the multi-user multi-input multi-output (MU-MIMO) broadcast systems. We consider the MU-MIMO system with either zero-forcing (ZF)-based transmit beamforming or receive beamforming. By analysis and simulations, we find that if the effects of feedback channel variations are taken into account, the receive ZF MIMO broadcast system can have higher sum rate than the transmit ZF MIMO broadcast system. The transmit ZF scheduler outperforms the receive ZF scheduler at the cost of feedback bandwidth and perfect channel state information.

Original languageEnglish
Title of host publicationProceedings of the 2009 ACM International Wireless Communications and Mobile Computing Conference, IWCMC 2009
Pages500-504
Number of pages5
DOIs
StatePublished - 30 Nov 2009
Event2009 ACM International Wireless Communications and Mobile Computing Conference, IWCMC 2009 - Leipzig, Germany
Duration: 21 Jun 200924 Jun 2009

Publication series

NameProceedings of the 2009 ACM International Wireless Communications and Mobile Computing Conference, IWCMC 2009

Conference

Conference2009 ACM International Wireless Communications and Mobile Computing Conference, IWCMC 2009
CountryGermany
CityLeipzig
Period21/06/0924/06/09

Keywords

  • MIMO broadcast channels
  • MIMO systems
  • Scheduling
  • Zero-forcing beamforming
  • Zero-forcing receiver

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