Enhancing coverage and capacity for multiuser MIMO systems by utilizing scheduling

Chiung Jang Chen*, Li-Chun Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

Recent studies have revealed that the remarkable capacity improvement resulting from an open-loop multiple-input-multiple-output (MIMO) spatial multiplexing system may come at the sacrifice of degrading link reliability. This tradeoff between antenna multiplexing gain against antenna diversity gain may translate into smaller coverage areas. In this paper, we suggest using the multiuser diversity to replenish the diversity-deficient spatial multiplexing MIMO system. Specifically, we propose a fair scheduling scheme, called the strongest-weakest-normalized-subchannel-first (SWNSF) scheduling, which requires only limited amount of feedback. Our analysis and results indicate that the SWNSF scheduling can significantly increase the coverage of the multiuser MIMO system while further improving the system capacity.

Original languageEnglish
Pages (from-to)1148-1157
Number of pages10
JournalIEEE Transactions on Wireless Communications
Volume5
Issue number5
DOIs
StatePublished - 1 May 2006

Keywords

  • Fading channels
  • MIMO systems
  • Scheduling
  • Spatial multiplexing

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