Spectral Efficiency Maximization for UAV Communication Systems Based on Ground-Aerial NOMA 


Vol. 48,  No. 1, pp. 12-22, Jan.  2023
10.7840/kics.2023.48.1.12


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  Abstract

Non-orthogonal multiple access (NOMA) technology is considered as one of promising technologies for improving the performance of next-generation wireless networks, owing to its high spectral efficiency and capability of supporting massive connectivity. To apply NOMA to unmanned aerial vehicle (UAV) communication systems, optimal power allocation and sub-band scheduling are important. Using a ground-aerial NOMA spectrum sharing model based on sparse code multiple access (SCMA), we propose an algorithm that maximizes the overall spectral efficiency of UAV communications while satisfying quality of service (QoS) requirements of ground users. First, the spectral efficiency of ground users is optimized via SCMA codebook assignments, and then, the spectral efficiency of UAV communications is maximized while satisfying the QoS requirements of ground users in terms of the minimum signal-to-interference-plus-noise ratio. The proposed optimization problem belongs to a mixed-integer nonconvex problem that optimizes resource allocation for UAV communications and joint power allocation for UAVs and ground users. To solve the problem efficiently, we utilize a heuristic search algorithm and the first-order inner approximation method. The convergence behavior and the spectral efficiency performance of the proposed algorithm are validated through simulation results.

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[IEEE Style]

G. Kang and O. Shin, "Spectral Efficiency Maximization for UAV Communication Systems Based on Ground-Aerial NOMA," The Journal of Korean Institute of Communications and Information Sciences, vol. 48, no. 1, pp. 12-22, 2023. DOI: 10.7840/kics.2023.48.1.12.

[ACM Style]

Gil-Mo Kang and Oh-Soon Shin. 2023. Spectral Efficiency Maximization for UAV Communication Systems Based on Ground-Aerial NOMA. The Journal of Korean Institute of Communications and Information Sciences, 48, 1, (2023), 12-22. DOI: 10.7840/kics.2023.48.1.12.

[KICS Style]

Gil-Mo Kang and Oh-Soon Shin, "Spectral Efficiency Maximization for UAV Communication Systems Based on Ground-Aerial NOMA," The Journal of Korean Institute of Communications and Information Sciences, vol. 48, no. 1, pp. 12-22, 1. 2023. (https://doi.org/10.7840/kics.2023.48.1.12)
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pISSN : 1226 - 4717
eISSN : 2287 - 3880