Full-Duplex Regenerative Relaying and Energy-Efficiency Optimization Over Generalized Asymmetric Fading Channels

Paschalis Sofotasios, Mulugeta Fikadu, Sami Muhaidat, Qimei Cui, George K. Karagiannidis, Mikko Valkama

    Research output: Contribution to journalArticleScientificpeer-review

    11 Citations (Scopus)


    This paper is devoted to the end-to-end performance analysis, optimal power allocation (OPA), and energy-efficiency (EE) optimization of decode-and-forward (DF)-based full-duplex relaying (FDR) and half-duplex relaying (HDR) systems. Unlike existing analyses and works that assume simplified transmission over symmetric fading channels, we consider the more realistic case of asymmetric multipath fading and shadowing conditions. To this end, exact and asymptotic analytic expressions are first derived for the end-to-end outage probabilities (OPs) of the considered DF-FDR set ups. Based on these expressions, we then formulate the OPA and EE optimization problems under given end-to-end target OP and maximum total transmit power constraints. It is shown that OP in FDR systems is highly dependent upon the different fading parameters and that
    OPA provides substantial performance gains, particularly, when the relay self-interference (SI) level is strong. Finally, the FDR is shown to be more energy-efficient than its HDR counterpart, as energy savings beyond 50% are feasible even for moderate values of the SI levels, especially at larger link distances, under given total transmit power constraints and OP requirements.
    Original languageEnglish
    Pages (from-to)3232-3251
    Number of pages19
    JournalIEEE Transactions on Wireless Communications
    Issue number5
    Publication statusPublished - May 2017
    Publication typeA1 Journal article-refereed


    • Full-duplex relaying, outage probability, fading channels, power allocation, energy efficiency

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    • Publication forum level 3


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