Flexible multi-user MIMO with limited feedback

Yongxing Zhou, Bruno Clercks, Sungjin Kim

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

6 Citations (Scopus)

Abstract

In a Multi-User MIMO (MU-MIMO) spatial multiplexing scheme, multiple users are scheduled in the same resource block (RB). However, due to the wide fluctuation of realistic traffic patterns, it could often occur that only a single or few users have active data that need to be sent. In 3GPP Long Term Evolution (LTE), Single-User MIMO (SU-MIMO) rank one precoding based Channel Quality Indicator (CQI) reporting mechanism is reused for MU-MIMO. This is optimum for MUMIMO if single user is served. Based on SU-MIMO Rank one reporting, CQI re-calculations at the Basestation (BS) are derived for Space Division Multiple Access (SDMA) mode and Zero-Forcing (ZF) mode respectively. A novel flexible MU-MIMO scheme with rank and mode adaptation is thus proposed for the first time with this limited feedback information. Simulation examples are provided to confirm the advantage of proposed flexible MU-MIMO scheme over SU-MIMO with 3GPP LTE framework.

Original languageEnglish
Title of host publicationVTC Spring 2009 - IEEE 69th Vehicular Technology Conference
DOIs
Publication statusPublished - 2009
Externally publishedYes
EventVTC Spring 2009 - IEEE 69th Vehicular Technology Conference - Barcelona, Spain
Duration: 2009 Apr 262009 Apr 29

Other

OtherVTC Spring 2009 - IEEE 69th Vehicular Technology Conference
CountrySpain
CityBarcelona
Period09/4/2609/4/29

Fingerprint

Multiuser MIMO
Limited Feedback
MIMO systems
Feedback
Multiple-input multiple-output (MIMO)
Long Term Evolution (LTE)
Spatial multiplexing
Zero-forcing
Space division multiple access
Precoding
Multiple Access
Term
Multiplexing
Division
Traffic
Fluctuations
Resources
Simulation

Keywords

  • Beamforming
  • Channel quality indicator (CQI) re-calculation
  • Limited feedback
  • Multiple-input multiple-output (MIMO)
  • MUMIMO
  • SDMA
  • ZF

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Applied Mathematics

Cite this

Zhou, Y., Clercks, B., & Kim, S. (2009). Flexible multi-user MIMO with limited feedback. In VTC Spring 2009 - IEEE 69th Vehicular Technology Conference [5073563] https://doi.org/10.1109/VETECS.2009.5073563

Flexible multi-user MIMO with limited feedback. / Zhou, Yongxing; Clercks, Bruno; Kim, Sungjin.

VTC Spring 2009 - IEEE 69th Vehicular Technology Conference. 2009. 5073563.

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

Zhou, Y, Clercks, B & Kim, S 2009, Flexible multi-user MIMO with limited feedback. in VTC Spring 2009 - IEEE 69th Vehicular Technology Conference., 5073563, VTC Spring 2009 - IEEE 69th Vehicular Technology Conference, Barcelona, Spain, 09/4/26. https://doi.org/10.1109/VETECS.2009.5073563
Zhou Y, Clercks B, Kim S. Flexible multi-user MIMO with limited feedback. In VTC Spring 2009 - IEEE 69th Vehicular Technology Conference. 2009. 5073563 https://doi.org/10.1109/VETECS.2009.5073563
Zhou, Yongxing ; Clercks, Bruno ; Kim, Sungjin. / Flexible multi-user MIMO with limited feedback. VTC Spring 2009 - IEEE 69th Vehicular Technology Conference. 2009.
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