Alternate transmission relaying based on interference alignment in 3-relay half-duplex MIMO systems

Seongho Park, Kihong Park, Youngchai Ko, Mohamed-Slim Alouini

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


In a half-duplex relaying, the capacity pre-log factor 1/2 is a major drawback in spectral efficiency. This paper proposes a linear precoding/decoding scheme and an alternate relaying protocol in a dual-hop half-duplex system where three relays help the communication between the source and the destination. In our proposed scheme, we consider a phase incoherent method in relays in which the source alternately transmits message signals to the different relays. In addition, we propose a linear interference alignment scheme which can suppress the inter-relay interference resulting from the phase incoherence of relaying. Based on our analysis of degrees of freedom and our simulation results, we show that our proposed scheme achieves additional degrees of freedom compared to the conventional half-duplex relaying. © 2012 IEEE.
Original languageEnglish (US)
Pages (from-to)1383-1389
Number of pages7
JournalIEEE Journal on Selected Areas in Communications
Issue number8
StatePublished - Sep 2012

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This research was supported in part by the KCC(Korea Communications Commission), Korea, under the R&D program supervised by the KCA(Korea Communications Agency) (KCA-2011-08913-04002), is funded in part by Korea University and is funded in part by King Abdullah University of Science and Technology. This is an expanded version of work which was presented at the International Conference on Information, Communications, and Signal Processing (ICICS 2011), Singapore, December 2011.

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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