Interference alignment for degrees of freedom improvement in 3-relay half-duplex systems

Seong Ho Park, Young Chai Ko, Ki Hong Park, Mohamed Slim Alouini

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    In a half-duplex relaying, the capacity pre-log factor is a major drawback in spectral efficiency. This paper proposes a linear precoding 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 eliminate the inter-relay interference resulted 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.

    Original languageEnglish
    Title of host publicationICICS 2011 - 8th International Conference on Information, Communications and Signal Processing
    DOIs
    Publication statusPublished - 2011
    Event8th International Conference on Information, Communications and Signal Processing, ICICS 2011 - Singapore, Singapore
    Duration: 2011 Dec 132011 Dec 16

    Publication series

    NameICICS 2011 - 8th International Conference on Information, Communications and Signal Processing

    Other

    Other8th International Conference on Information, Communications and Signal Processing, ICICS 2011
    Country/TerritorySingapore
    CitySingapore
    Period11/12/1311/12/16

    ASJC Scopus subject areas

    • Computer Networks and Communications
    • Information Systems
    • Signal Processing

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