Secure Relaying in Multihop Communication Systems

Esa R. Alotaibi, Khairi Hamdi

    Research output: Contribution to journalArticlepeer-review


    This letter considers improving end-to-end secrecy capacity of a multihop decode-and-forward relaying system. First, a secrecy rate maximization problem without transmitting artificial noise (AN) is considered, following which the AN-aided secrecy schemes are proposed. Assuming that global channel state information (CSI) is available, an optimal power splitting solution is proposed. Furthermore, an iterative joint optimization of transmit power and power splitting coefficient has also been considered. For the scenario of no eavesdropper's CSI, we provide a suboptimal solution. The simulation results demonstrate that the AN-aided optimal scheme outperforms other schemes.
    Original languageEnglish
    Pages (from-to)1120 - 1123
    JournalIEEE Communications Letters
    Issue number6
    Publication statusPublished - 4 Apr 2016


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