Robust Resource Allocation for RSMA-Enabled Spectrum-Sharing Networks

Yuhang Wu, Fuhui Zhou, Wei Wu, Qihui Wu, Derrick Wing Kwan Ng, Tony Q.S. Quek

研究成果: Conference contribution

摘要

Spectrum sharing is a promising solution to address the spectrum scarcity problem by enabling the coexistence of different networks in the same frequency band. However, the interference brought by concurrent transmissions is an obstacle to further enhance the spectral efficiency. Therefore, to overcome the bottleneck caused by multi-user interference, rate-splitting multiple access (RSMA)-enabled spectrum-sharing networks are considered in this paper. To facilitate a robust resource allocation design, the worst-case weighted sum rate maximization for the secondary network is studied. Under the norm-bounded channel state information (CSI) error model, the common and the private beamforming vectors as well as the common rate allocation are jointly optimized subject to interference temperature constraints at the primary users (PUs). To solve the formulated challenging non-convex quadratically-constrained resource allocation optimization problem, an efficient successive convex approximation (SCA)-based algorithm capitalizing on semidefinite relaxation (SDR) is proposed. Simulation results demonstrate that the proposed algorithm yields a better worst-case WSR than an nonorthogonal multiple access (NOMA)-based benchmark scheme. It is also shown that the proposed RSMA scheme offers a higher robustness against imperfect CSI than the scheme adopting NOMA.

原文English
主出版物標題2023 IEEE 15th International Conference on Wireless Communications and Signal Processing, WCSP 2023
發行者Institute of Electrical and Electronics Engineers Inc.
頁面827-832
頁數6
ISBN(電子)9798350324662
DOIs
出版狀態Published - 2023
事件15th IEEE International Conference on Wireless Communications and Signal Processing, WCSP 2023 - Hangzhou, China
持續時間: 2023 11月 22023 11月 4

出版系列

名字2023 IEEE 15th International Conference on Wireless Communications and Signal Processing, WCSP 2023

Conference

Conference15th IEEE International Conference on Wireless Communications and Signal Processing, WCSP 2023
國家/地區China
城市Hangzhou
期間23-11-0223-11-04

All Science Journal Classification (ASJC) codes

  • 媒體技術
  • 人工智慧
  • 電腦網路與通信
  • 電腦視覺和模式識別
  • 訊號處理

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