Non-orthogonal multiple access (NOMA) has been recognized as one of the key enabling technologies for future generation wireless networks. Sharing the same time-frequency resource among users imposes secrecy challenges in NOMA in the presence of untrusted users. This paper characterizes the impact of user-pair selection on the secrecy performance of an untrusted NOMA system. In this regard, an optimization problem is formulated to maximize the secrecy rate of the strong user while satisfying the quality of service (QoS) demands of the user with poorer channel conditions. To solve this problem, we first obtain optimal power allocation in a two-user NOMA system, and then investigate the user-pair selection problem in a more generalized four user NOMA system. Extensive performance evaluations are conducted to validate the accuracy of the proposed results and present valuable insights on the impact of various system parameters on the secrecy performance of the NOMA communication system.


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    Titel :

    User-Pair Selection for QoS-Aware Secrecy Rate Maximization in Untrusted NOMA


    Beteiligte:
    Thapar, Sapna (Autor:in) / Mishra, Deepak (Autor:in) / Saini, Ravikant (Autor:in) / Ding, Zhiguo (Autor:in)


    Erscheinungsdatum :

    01.09.2022


    Format / Umfang :

    576164 byte





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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