Research on IRS-assisted NOMA energy efficiency transmission scheme

Authors

  • Xiaojuan Bai
  • Fei Bao
  • Xingxing Li

DOI:

https://doi.org/10.54097/jceim.v11i2.11756

Keywords:

Intelligent reflect surface, Non-orthogonal multiple access, Energy efficiency, Power allocation, Phase shift optimization

Abstract

The combination of intelligent reflect surface (IRS) and non-orthogonal multiple access (NOMA) is an effective solution to improve communication coverage and energy efficiency. Energy efficiency (EE) is an important performance index of communication system. In this paper, the IRS-assisted NOMA downlink multi-cluster system is taken as the research object. Under the requirement of user quality of services (QoS), the energy efficiency of the system is maximized by alternately optimizing the power allocation of the base station and the phase shift of the IRS passive components. However, the non-convexity of the optimization problem and the coupling of the optimization variables make the optimization problem difficult to solve. Therefore, a new alternating optimization scheme is proposed in this paper. The problem is divided into two sub-problems, which are solved by first-order Taylor expansion method, successive convex approximation method and semi-definite relaxation method respectively. The simulation results show that the IRS-NOMA transmission scheme proposed in this paper has better performance than other transmission schemes of RIS-NOMA system.

References

Wu Q, Zhang R. Towards smart and reconfigurable environment: Intelligent reflecting surface aided wireless network[J]. IEEE communications magazine, 2019, 58(1): 106-112.

Renzo M D, Debbah M, Huy D T P, et al. Smart Radio Environments Empowered by AI Reconfigurable Meta-Surfaces: An Idea Whose Time Has Come. arXiv 2019[J]. arXiv preprint arXiv:1903.08925.

Wu Q, Zhang R. Intelligent reflecting surface enhanced wireless network via joint active and passive beamforming[J]. IEEE transactions on wireless communications, 2019, 18(11): 5394-5409.

Yang K, Yang N, Ye N, et al. Non-orthogonal multiple access: Achieving sustainable future radio access[J]. IEEE Communications Magazine, 2018, 57(2): 116-121.

Fang F, Zhang H, Cheng J, et al. Energy-efficient resource allocation for downlink non-orthogonal multiple access network[J]. IEEE Transactions on Communications, 2016, 64(9): 3722-3732.

A. S. de Sena et al., "What role do intelligent reflecting surfaces play in non-orthogonal multiple access," IEEE Wireless Commun. Mag., Jul. 2020.

B. Zheng, Q. Wu, and R. Zhang, "Intelligent reflecting surface-assisted multiple access with user pairing: NOMA or OMA," IEEE Commun. Lett., vol. 24, no. 4, pp. 753–757, Apr. 2020

Yang G, Xu X, Liang Y C. Intelligent reflecting surface assisted non-orthogonal multiple access[C]//2020 IEEE wireless communications and networking conference (WCNC). IEEE, 2020: 1-6.

Mu X, Liu Y, Guo L, et al. Exploiting intelligent reflecting surfaces in multi-antenna aided NOMA systems[J]. arXiv preprint arXiv:1910.13636, 2019: 0090-6778.

Zhu J, Huang Y, Wang J, et al. Power efficient IRS-assisted NOMA[J]. IEEE Transactions on Communications, 2020, 69(2): 900-913..

Wang H, Liu C, Shi Z, et al. On power minimization for IRS-aided downlink NOMA systems[J]. IEEE wireless communications letters, 2020, 9(11): 1808-1811.

Fu M, Zhou Y, Shi Y. Intelligent reflecting surface for downlink non-orthogonal multiple access networks[C]//2019 IEEE Globecom Workshops (GC Wkshps). IEEE, 2019: 1-6.

Liu Y, Liu X, Mu X, et al. Reconfigurable intelligent surfaces: Principles and opportunities. IEEE communications surveys & tutorials, 2021, 23(3): 1546-1577.

Zeng M, Li X, Li G, et al. Sum rate maximization for IRS-assisted uplink NOMA[J]. IEEE Communications Letters, 2020, 25(1): 234-238.

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Published

27-09-2023

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Section

Articles

How to Cite

Bai, X., Bao, F., & Li, X. (2023). Research on IRS-assisted NOMA energy efficiency transmission scheme. Journal of Computing and Electronic Information Management, 11(2), 22-26. https://doi.org/10.54097/jceim.v11i2.11756

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