Regularized channel inversion for multiple-antenna users in multiuser MIMO downlink

Heunchul Lee, Kwangwon Lee, Bertrand M. Hochwald, Inkyu Lee

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

18 Citations (Scopus)


Channel inversion is one of the simplest techniques for multiuser downlink systems with single-antenna users. In this paper, we extend the regularized channel inversion technique developed for the single-antenna user case to multiuser multiple-input multiple-output (MIMO) channels with multiple-antenna users. We first employ the multiuser preprocessing to project the multiuser signals near the null space of the unintended users based on the MMSE criterion, and then the single-user preprocessing is applied to the decomposed MIMO interference channels. In order to reduce the complexity, we focus on non-iterative solutions for the multiuser transmit beamforming and use a linear receiver based on an MMSE criterion. Simulation results show that the proposed scheme outperforms existing joint iterative algorithms in most multiuser configurations.

Original languageEnglish
Title of host publicationICC 2008 - IEEE International Conference on Communications, Proceedings
Number of pages5
Publication statusPublished - 2008
EventIEEE International Conference on Communications, ICC 2008 - Beijing, China
Duration: 2008 May 192008 May 23

Publication series

NameIEEE International Conference on Communications
ISSN (Print)0536-1486


OtherIEEE International Conference on Communications, ICC 2008

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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