Cooperative diversity with multiple-antenna nodes in fading relay channels

Hakam Muhaidat, Murat Uysal

Research output: Contribution to journalArticlepeer-review


In this paper, we investigate the performance of a single-relay cooperative scenario where the source, relay and destination terminals are equipped with multiple transmit/receive antennas. We assume that conventional space-time block codes are employed in the underlying source-to-destination (S → D), source-to-relay (S → R) and relay-to-destination (R → D) links, and consider both decode-and-forward (DaF) and amplify-and-forward (AaF) relaying techniques. For the latter one, we consider two variants based on the availability of channel state information (CSI); namely, blind AaF and CSI-assisted AaF. Through the derivation of pairwise error probability, we quantify analytically the impact of multiple antenna deployment for each relaying technique under various scenarios which involve relay location and power control assumptions imposed on cooperating nodes. Our transmission model assumes that the source and destination terminals are equipped with M S transmit and N receive antennas, respectively, and the relay terminal is equipped with MR receive and MT transmit antennas. For a scenario where R → D and S → D links are balanced and S → R link experiences sufficiently large SNR, our performance analysis demonstrates that the maximum achievable diversity order is MT min(MS, N)+MSN for blind AaF scheme and N(M T+MS) for both CSI-assisted AaF and DaF schemes. For another scenario where R → D link has a sufficiently large SNR and S → R and S → D links are balanced, CSI-assisted AaF, blind AaF and DaF schemes achieve diversity orders of MS(N + MR), M S(N + MT), and MSN, respectively. Other scenarios involving the availability of non-fading R → D link and poor inter-user channel quality are further investigated. An extensive Monte Carlo simulation study is also presented to corroborate the analytical results and to provide detailed performance comparisons among the three relaying techniques under consideration.

Original languageEnglish (US)
Article number4600216
Pages (from-to)3036-3046
Number of pages11
JournalIEEE Transactions on Wireless Communications
Issue number8
StatePublished - Aug 2008


  • Cooperative diversity
  • Fading channels
  • Multiple antennas
  • Pairwise error probability
  • Space-time block coding

ASJC Scopus subject areas

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


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