Opportunistic decode-and-forward relaying with interferences at relays

Sung Il Kim, Saejoon Kim, Joon Tae Kim, Jun Heo

    Research output: Contribution to journalArticlepeer-review

    10 Citations (Scopus)

    Abstract

    In this paper, a decode-and-forward cooperative interference-limited multiple relay network is considered. An efficient relay selection strategy and its performance analysis are proposed, where only the relay nodes are affected by multiple interferences. In the proposed relay selection scheme, the selected relay is not always used, depending on the power of interferences and the channel state information of all links, while the direct path between source and destination is always used. For analytical tractability the distribution of interference-limited channel is approximated as an exponential distribution with high accuracy. Analysis of cooperative networks with interference-limited relays can be performed using the approximate exponential distribution by the same methods which have been used without interferences. We derive the bit error probability and outage probability of the proposed opportunistic max-min relay selection (OMRS) scheme in independent non-identically distributed Rayleigh fading channels. Numerical results present the superiority of OMRS over the conventional relay selection scheme which always uses the selected relay path. The exactness of the approximate analysis for interference-limited relays is also shown in numerical results.

    Original languageEnglish
    Pages (from-to)247-264
    Number of pages18
    JournalWireless Personal Communications
    Volume68
    Issue number2
    DOIs
    Publication statusPublished - 2013 Jan

    Bibliographical note

    Funding Information:
    Acknowledgments This research was supported by the KCC (Korea Communications Commission), Korea, under the “Development of highly efficient transmission technology for the next generation terrestrial 3D HDTV” support program supervised by the KCA (Korea Communications Agency)”(KCA-2011-10912-02002) and the MKE (The Ministry of Knowledge Economy), Korea, under the ITRC (Information Technology Research Center) support program supervised by the NIPA (National IT Industry Promotion Agency) (NIPA-2011-C1090-1131-0009).

    Keywords

    • Bit error probability
    • Decode-and-forward (DF) relaying
    • Max-min selection
    • Multiple interferences
    • Outage probability

    ASJC Scopus subject areas

    • Computer Science Applications
    • Electrical and Electronic Engineering

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