This paper investigates the outage performance of a two-user downlink non-orthogonal multiple access (NOMA) system with imperfect channel state information at the transmitter (CSIT). A general closed-form outage probability expression is derived under consideration of imperfect successive interference cancellation (SIC) for both NOMA users based on instantaneous channel estimates and the corresponding mean-squared errors. With the derived expression, a low-complexity power allocation formula is proposed for outage balancing, i.e., minimizing the maximum user outage probability, in order to provide robustness against channel uncertainty. As compared with a previous iterative power allocation method for the same purpose, the proposed one involves much lower complexity and achieves a significantly better balance between the outage performance for the two users when there exist SIC errors.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Low-Complexity Power Allocation for Outage Balancing in NOMA Systems with Imperfect CSIT


    Beteiligte:


    Erscheinungsdatum :

    07.10.2024


    Format / Umfang :

    508074 byte





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





    Resource Allocation for NOMA Networks under Alternative Outage Constraints

    Cui, Fangyu / Qin, Zhijin / Cai, Yunlong et al. | IEEE | 2019


    Poster: α Fair Resource Allocation for RIS-Assisted NOMA V2X Systems with Imperfect Phase Compensation

    Srivastava, Swaraj / Ramamoorthi, Yoghitha / Kumar, Abhinav et al. | IEEE | 2024


    Multi-Cell MIMO User Rate Balancing with Partial CSIT

    Ghamnia, Imene / Slock, Dirk / Yuan-Wu, Yi | IEEE | 2021