MIMO precoder selections in decode-forward relay networks with finite feedback

Duckdong Hwang, Junil Choi, Bruno Clercks, Gil Kim

Research output: Contribution to journalArticle

4 Citations (Scopus)


We consider a system with precoding in the half duplex Decode-Forward (DF) relay networks, where multiple antennas are adopted at the source, the destination and the relay. Based on the channel state information (CSI), a few feedback bits are fed back from the destination to the source and the relay to select the source and the relay precoders. A suboptimal precoder selection criterion for the symbol vector error minimization and an optimal precoder selection criterion for the capacity maximization are proposed for the practical situation where relays are placed between the source and the destination. We analyze the diversity performance of the criteria and show that the full diversity is achieved when the rank one precoder sets span the vector channel space formed by the transmit antennas of the source and the those of the relay.

Original languageEnglish
Article number5771500
Pages (from-to)1785-1790
Number of pages6
JournalIEEE Transactions on Communications
Issue number7
Publication statusPublished - 2011 Jul
Externally publishedYes



  • codebook
  • DF relay network
  • diversity
  • MIMO
  • precoder selection

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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