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

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Abstract

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

Bibliographical metadata

Original languageEnglish
Title of host publicationIEEE Vehicular Technology Conference
PublisherIEEE Computer Society
StateAccepted/In press - 30 Jan 2017
Event2017 IEEE 85th Vehicular Technology Conference - Sydney, Australia

Conference

Conference2017 IEEE 85th Vehicular Technology Conference
Abbreviated titleVTC2017-Spring
CountryAustralia
CitySydney
Period4/06/177/06/17
Internet address