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Dynamic Resource Allocation in Non-orthogonal Multiple Access Using Weighted Maximin Fairness Strategy for a UAV Network

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Abstract

Non-orthogonal multiple access (NOMA) with power domain multiplexing and successive interference cancellation (SIC) is one of the promising technologies for future wireless communication. The performance of NOMA is highly dependent on resource allocation such as power allocation and channel assignment. In this paper, we investigate the power allocation (PA) scheme, to optimize the weighted maximin fairness (MMF) for 2-user and 3-user clusters. We utilize the particle swarm optimization (PSO) based algorithm for power allocation due to its promising behavior. Application area of NOMA is becoming broader, then, we considered a cellular network, assisted by an unmanned aerial vehicle (UAV) as the base station (BS) which is integrated with the NOMA system. The PA for weighted MMF problem in NOMA is non-convex, it is difficult to find out the optimal solution directly. Simulation results show the performance of PSO-based algorithm in different adaptive weights and its convergence characteristics. We have also shown that the rate and fairness tradeoff using weighted maximin fairness. Numerical results compare the performance of NOMA and orthogonal multiple access (OMA) and prove the significance of the proposed algorithm.

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Authors and Affiliations

  1. Department of Computer Science and Communications Engineering, Faculty of Science and Engineering, Waseda University, Tokyo, Japan

    Dhruba Raj Dhakal, Zhenni Pan, Megumi Saito & Shigeru Shimamoto

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  1. Dhruba Raj Dhakal
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  2. Zhenni Pan
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  3. Megumi Saito
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  4. Shigeru Shimamoto
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Correspondence to Shigeru Shimamoto.

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Dhakal, D.R., Pan, Z., Saito, M. et al. Dynamic Resource Allocation in Non-orthogonal Multiple Access Using Weighted Maximin Fairness Strategy for a UAV Network. J Sign Process Syst 92, 1397–1406 (2020). https://doi.org/10.1007/s11265-020-01565-8

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  • DOI: https://doi.org/10.1007/s11265-020-01565-8

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