A decoupling approach for low-complexity vector perturbation in multiuser downlink systems

Seok Hwan Park, Hyeon Seung Han, Sunho Lee, Inkyu Lee

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

In this letter, we propose an efficient algorithm which reduces the complexity of conventional vector perturbation schemes by searching the real and imaginary components of a perturbation vector individually. To minimize a performance loss induced from the decoupled joint search, we apply diagonal precoding at the transmitter whose parameters are iteratively optimized to maximize the chordal distance between subspaces spanned by the real and imaginary components. We also propose a simple non-iterative method with a slight performance loss which can achieve a significant complexity reduction compared to the conventional vector perturbation schemes.

Original languageEnglish
Article number5751188
Pages (from-to)1697-1701
Number of pages5
JournalIEEE Transactions on Wireless Communications
Volume10
Issue number6
DOIs
Publication statusPublished - 2011

Keywords

  • Multiuser downlink
  • vector perturbation

ASJC Scopus subject areas

  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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