Beamforming and Phase Design for Active RIS-Aided Communications Using GBML

IF 4.5 3区计算机科学 Q2 TELECOMMUNICATIONS

IEEE Communications Letters Pub Date : 2026-01-12 DOI:10.1109/LCOMM.2025.3647094

Jingming Tang;Nai Wu;Yaolian Song;Ziyi Jiang;Guicai Yu

引用次数: 0

Abstract

In this letter, we investigate a multi-user communication network aided by active reconfigurable intelligent surface (RIS). To maximize the weighted sum rate (WSR) of the system, we formulate a joint transmit precoding and RIS coefficient optimization problem. However, the traditional alternating direction method of multipliers (ADMM) optimization approach for the problem suffers from high computational complexity and can only able to obtain suboptimal solutions. To deal with this issue, we propose a gradient-based meta-learning (GBML) scheme, which fuses meta-learning, neural network and nested iteration to improve the overall spectral efficiency and reduce the computational complexity associated with high-dimensional variables. Simulation results indicate that the proposed scheme can improve the WSR by up to 10.6%/70.25% in ideal/non-ideal scenarios compared with ADMM, and achieve a faster convergence rate as well.

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基于GBML的有源ris辅助通信波束形成与相位设计

在这封信中，我们研究了一个由主动可重构智能表面（RIS）辅助的多用户通信网络。为了使系统的加权和率（WSR）最大化，我们提出了一个联合传输预编码和RIS系数优化问题。然而，传统的乘法器交替方向优化方法（ADMM）计算量大，只能得到次优解。为了解决这一问题，我们提出了一种基于梯度的元学习（GBML）方案，该方案融合了元学习、神经网络和嵌套迭代，以提高整体频谱效率，降低与高维变量相关的计算复杂度。仿真结果表明，与ADMM相比，该方案在理想和非理想场景下的WSR分别提高了10.6%和70.25%，收敛速度更快。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Communications Letters 工程技术-电信学

CiteScore

8.10

自引率

7.30%

发文量

590

审稿时长

2.8 months

期刊介绍： The IEEE Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of communication over different media and channels including wire, underground, waveguide, optical fiber, and storage channels. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of communication systems.