Fair scheduling and orthogonal linear preceding/decoding in broadcast MIMO systems

R. Bosisio, G. Primolevo, O. Simeone, U. Spagnolini

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

3 Scopus citations

Abstract

In the downlink of a multi-user MIMO system over a fading channel, the base station can assign the available spatial streams to different users by capitalizing on multiuser diversity or enforcing fairness constraints. Assuming linear precoding (beamforming) at the base station, the problem amounts to the joint design of precoding matrices and channel aware scheduling, according to the cross-layer paradigm. In this paper we formulate the joint optimization of scheduling and linear precoding within a physical layer-oriented framework, where the performance metric is the transmission rate. Moreover, we constraint the preceding scheme to ensure interference-free reception of spatial streams (Orthogonal Space Division Multiple Access, OSDMA). Fairness constraints are either inspired by the max-min or the proportional fair criterion. Performance of different schemes is evaluated by numerical simulations allowing to assess the trade-offs between sum-rate (multi-user diversity) and fairness.

Original languageEnglish (US)
Title of host publication2005 IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2005
Pages832-836
Number of pages5
StatePublished - Dec 1 2005
Externally publishedYes
Event2005 IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2005 - Berlin, Germany
Duration: Sep 11 2005Sep 14 2005

Publication series

NameIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
Volume2

Other

Other2005 IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2005
CountryGermany
CityBerlin
Period9/11/059/14/05

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Keywords

  • Channel-aware scheduling
  • Downlink
  • Fairness
  • MIMO
  • Precoding

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