Switched diversity strategies for dual-hop amplify-and-forward relaying systems

Fakhreddine Gaaloul, Redha Mahmoud Mesleh Radaydeh, Mohamed-Slim Alouini

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


This study investigates different receive single-branch switch-based diversity schemes for dual-hop amplify-and-forward relaying networks. Specifically, three receive processing algorithms are adopted, in which the receive branch is selected using the arbitrary selection algorithm, the switching algorithm, or the switching algorithm with post-examining best branch selection. The identification of the receive branch is carried out for two different system models. For the first model, a single-antenna relaying station is used in conjunction with a multiple-antenna transceiver, where the processing is performed independently of the first hop-fading conditions. The second model suggests the use of parallel deployment of single-antenna relays to transfer information from a multiple-antenna transmitter to a single-antenna receiver, where the active relaying station is determined based on the pre-combining end-to-end fading conditions. Performance comparisons for various transmission scenarios on the first hop are presented using new formulations for the statistics of the combined signal-to-noise ratio. Simulation results are also provided to validate the mathematical development and to verify the numerical computations. © 2012 The Institution of Engineering and Technology.
Original languageEnglish (US)
Pages (from-to)1651
JournalIET Communications
Issue number12
StatePublished - 2012

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering


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