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App. Res. of Comp. Accepted Paper
Vol. 42, 2025 No. 12

Beamforming and power control for active ris-enabled networks

Lei Fang
Chen Chuanyang
Hu Xin
School of Communications & Information Engineering, Chongqing University of Posts & Telecommunications, Chongqing 400065, China
DOI: 10.19734/j.issn.1001-3695.2025.05.0164

Abstract

To mitigate the severe path loss caused by multiplicative fading in passive RIS-assisted systems, this paper proposed a low-complexity, energy-efficient joint optimization scheme for multi-user communications with active RIS. The scheme aimed to maximize the weighted sum rate (WSR) under transmit power constraints at both the base station and the RIS. By leveraging fractional programming (FP) , the original non-convex problem was transformed into a series of tractable subproblems. A block coordinate descent (BCD) framework solved these subproblems by alternately optimizing the BS beamforming and RIS reflection matrices. To update the RIS reflection matrix, the algorithm adopted a majorization-minimization (MM) approach to construct a closed-form surrogate lower bound, simplifying the optimization process to matrix-vector multiplications and projection operations. Compared to CVX-based methods, the proposed algorithm reduced the computational complexity by approximately O(N1.5) and outperformed binary search methods in convergence and performance at similar complexity. Simulation results show that the proposed scheme improves WSR by 27.67% at 15 dBm, and achieves similar performance with only 5 dBm, reducing energy consumption by about 10 dB, making it well suited for rapid deployment in large-scale RIS systems.

Foundation Support

重庆市自然科学基金创新发展联合基金(中国星网)资助项目(CSTB2023NSCQ-LZX0114)

Publish Information

DOI: 10.19734/j.issn.1001-3695.2025.05.0164
Publish at: Application Research of Computers Accepted Paper, Vol. 42, 2025 No. 12

Publish History

[2025-08-21] Accepted Paper

Cite This Article

雷芳, 陈传阳, 胡鑫. 有源可重构网络中的联合波束优化与功率控制 [J]. 计算机应用研究, 2025, 42 (12). (2025-08-21). https://doi.org/10.19734/j.issn.1001-3695.2025.05.0164. (Lei Fang, Chen Chuanyang, Hu Xin. Beamforming and power control for active ris-enabled networks [J]. Application Research of Computers, 2025, 42 (12). (2025-08-21). https://doi.org/10.19734/j.issn.1001-3695.2025.05.0164. )

About the Journal

  • Application Research of Computers Monthly Journal
  • Journal ID ISSN 1001-3695
    CN  51-1196/TP

Application Research of Computers, founded in 1984, is an academic journal of computing technology sponsored by Sichuan Institute of Computer Sciences under the Science and Technology Department of Sichuan Province.

Aiming at the urgently needed cutting-edge technology in this discipline, Application Research of Computers reflects the mainstream technology, hot technology and the latest development trend of computer application research at home and abroad in a timely manner. The main contents of the journal include high-level academic papers in this discipline, the latest scientific research results and major application results. The contents of the columns involve new theories of computer discipline, basic computer theory, algorithm theory research, algorithm design and analysis, blockchain technology, system software and software engineering technology, pattern recognition and artificial intelligence, architecture, advanced computing, parallel processing, database technology, computer network and communication technology, information security technology, computer image graphics and its latest hot application technology.

Application Research of Computers has many high-level readers and authors, and its readers are mainly senior and middle-level researchers and engineers engaged in the field of computer science, as well as teachers and students majoring in computer science and related majors in colleges and universities. Over the years, the total citation frequency and Web download rate of Application Research of Computers have been ranked among the top of similar academic journals in this discipline, and the academic papers published are highly popular among the readers for their novelty, academics, foresight, orientation and practicality.

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