A vector perturbation with user selection for multiuser MIMO downlink

Byungju Lee, Byonghyo Shim

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Recent works on multiuser MIMO study have shown that the linear growth of capacity in single user MIMO system can be translated to the multiuser MIMO scenario as well. In this paper, we propose a method pursuing performance gain of vector perturbation in multiuser downlink systems. Instead of employing the maximum number of mobile users for communication, we use small part of them as virtual users for improving reliability of users participating communication. By controlling parameters of the virtual users including information and perturbation vector, we obtain considerable improvement in the effective SNR. Simulation results on the realistic multiuser MISO and MIMO downlink systems show that the proposed method brings substantial performance gain over the standard vector perturbation with marginal overhead in computations.

Original languageEnglish
Article number6328205
Pages (from-to)3322-3331
Number of pages10
JournalIEEE Transactions on Communications
Volume60
Issue number11
DOIs
Publication statusPublished - 2012

Keywords

  • Multiuser downlink
  • non-integer least square
  • sphere encoding
  • transmit precoding
  • vector perturbation
  • virtual users

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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