Multiuser MISO interference channels with single-user detection: Optimality of beamforming and the achievable rate region

Xiaohu Shang, Biao Chen, H. Vincent Poor

Research output: Contribution to journalArticle

78 Scopus citations

Abstract

For a multiuser interference channel with multiantenna transmitters and single-antenna receivers, by restricting each transmitter to a Gaussian input and each receiver to a single-user detector, computing the largest achievable rate region amounts to solving a family of nonconvex optimization problems. Recognizing the intrinsic connection between the signal power at the intended receiver and the interference power at the unintended receiver, the original family of nonconvex optimization problems is converted into a new family of convex optimization problems. It is shown that, for such interference channels with each receiver implementing single-user detection, transmitter beamforming can achieve all boundary points of the achievable rate region.

Original languageEnglish (US)
Article number5895091
Pages (from-to)4255-4273
Number of pages19
JournalIEEE Transactions on Information Theory
Volume57
Issue number7
DOIs
StatePublished - Jul 1 2011

Keywords

  • Achievable rate region
  • Gaussian interference channel
  • beamforming

ASJC Scopus subject areas

  • Information Systems
  • Computer Science Applications
  • Library and Information Sciences

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