Abstract
AbstractThis paper focuses on energy-efficient resource allocation in reconfigurable intelligent surface (RIS)-assisted multiple-input-single-output (MISO) communication systems. Specifically, it revisits the solution to the energy efficiency (EE) problem using the alternating optimization (AO) approach. In each AO iteration, the RIS phase optimization is achieved using the gradient descent method, which unfortunately does not guarantee convergence. To overcome this limitation, we propose two alternatives: the Wolfe-based gradient-descent (GAW) EE maximization Algorithm and the trust region (TR)-based EE maximization algorithm. Additionally, we use Dinkelbach’s algorithm to obtain the optimal transmit power allocation. Our results demonstrate that the proposed methods outperform the existing approach that uses sequential fractional programming (SFP) for phase optimization and the traditional relay-based method.
Publisher
Springer Science and Business Media LLC
Subject
Computer Networks and Communications,Computer Science Applications,Signal Processing
Reference32 articles.
1. N. Rajatheva, I. Atzeni, E. Bjornson, A. Bourdoux, S. Buzzi, J.B. Dore, S. Erkucuk, M. Fuentes, K. Guan, Y. Hu, X. Huang, White paper on broadband connectivity in 6G. arXiv preprint arXiv:2004.14247. (2020)
2. W. Saad, M. Bennis, M. Chen, A vision of 6G wireless systems: applications, trends, technologies, and open research problems. IEEE Netw. 34(3), 134–42 (2019)
3. Mitra P, Bhattacharjee R, Chatterjee T, De S, Karmakar R, Ghosh A, Adhikari T. Towards 6G Communications: Architecture, Challenges, and Future Directions. In2021 12th International Conference on Computing Communication and Networking Technologies (ICCCNT) 2021 Jul 6 (pp. 1–7). IEEE.
4. C. Huang, A. Zappone, G.C. Alexandropoulos, M. Debbah, C. Yuen, Reconfigurable intelligent surfaces for energy efficiency in wireless communication. IEEE Trans. Wirel. Commun. 18(8), 4157–70 (2019)
5. Z. Yang, M. Chen, W. Saad, W. Xu, M. Shikh-Bahaei, H.V. Poor, S. Cui, Energy-efficient wireless communications with distributed reconfigurable intelligent surfaces. IEEE Trans. Wirel. Commun. 21(1), 665–79 (2021)
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