Multi-user MIMO MMSE non-regenerative relaying using local channel state information

Hana Stefanović, Veljko Stanković, Mihajloč Stefanović, Petar Spalević, Stefan R. Panić, Srdjan Milosavljević

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In this article, we investigate a two-hop relaying communication where all nodes are equipped with antenna arrays. We derive the multiple-input multiple-output (MIMO) processing matrices using the mean-squared-error cost function and assuming that each node uses only locally available channel state information estimates. Spatial processing at the base station and at the user terminals is same as in the case of a direct communication. The emphasis is on the design of the MIMO precoding matrix at the relay as it has to process the noise and the interference on the first and on the second hop at the same time. The resulting system performance is close to the performance of the system that jointly optimizes matrices at the source and at the relay. The proposed solution requires significantly less computational power and feedback overhead than the solutions proposed in the literature.

Original languageEnglish
Article number186
JournalEurasip Journal on Advances in Signal Processing
Volume2012
Issue number1
DOIs
Publication statusPublished - 1 Dec 2012
Externally publishedYes

Keywords

  • MIMO systems
  • MMSE processing
  • Multi-user MIMO
  • Relaying

ASJC Scopus subject areas

  • Signal Processing
  • Hardware and Architecture
  • Electrical and Electronic Engineering

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