This paper investigates the resource allocation scheme to maximize the energy efficiency for a downlink nonorthogonal multiple access (NOMA) system. An optimization problem is formulated taking into account the total power and the minimum user rate requirements to balance the system energy efficiency and the total system throughput. Due to the complexity of the objective function, we used the Dinkelbach approach to convert the non-linear fractional programming problem into a simpler subtractive form. Then, the equivalent subtractive form-objective function problem is solved by using iterative programming. A subgradient based resource allocation algorithm is proposed to allocate the power for each user. Simulation results justify the effectiveness of the proposed method and show how it approaches the optimal solution. It also shows that the proposed schemes for NOMA provide better performance than the orthogonal frequency division multiple access (OFDMA) in terms of the energy efficiency and sum rate.


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    Titel :

    Energy Efficient Resource Allocation in Downlink Non-Orthogonal Multiple Access (NOMA) System


    Beteiligte:
    Al-Abbasi, Ziad Qais (Autor:in) / So, Daniel K. C. (Autor:in) / Tang, Jie (Autor:in)


    Erscheinungsdatum :

    2017-06-01


    Format / Umfang :

    251301 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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