A comprehensive study of repetition-coded protocols in multi-user multi-relay networks

Chao Wang, Yijia Fan, John S. Thompson, H. Vincent Poor

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


The diversity-multiplexing tradeoff (DMT) performances of novel decode-and-forward (DF) relaying protocols for multi-source multi-relay cooperative networks are studied in this paper. For a strong-interference scenario and an isolated-relay scenario, the proposed protocols significantly improve diversity performance over direct source-destination transmissions by using a simple repetition coding strategy in relays. This is in addition to enhancing the multiplexing performance over standard DF protocols, which usually suffer from the half-duplex limitation at relays. Although the DMT performance of DF based relaying protocols is limited by the quality of source relay links in principle, adaptive forms of the proposed protocols at the relays can transmit/not transmit according to source relay transmissions and still provide link reliability and spectral efficiency advantages in general source-relay channel conditions.

Original languageEnglish (US)
Article number5200992
Pages (from-to)4329-4339
Number of pages11
JournalIEEE Transactions on Wireless Communications
Issue number8
StatePublished - Aug 2009

All Science Journal Classification (ASJC) codes

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


  • Cooperative diversity
  • Diversity-multiplexing tradeoff (DMT)
  • Repetition coding


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