摘要
针对有源全连接架构的可重构智能表面(Reconfigurable Intelligent Surface,RIS)功耗较高且存在反馈型自干扰的问题,提出了一种准确优化的子连接架构,利用多个RIS元件共享功率放大器,并结合分数规划和交替方向乘子法等方法进行波束成形设计,减少功率放大器数量并降低功耗,同时引入自干扰抑制机制,并利用序列无约束极小化技术求解,改善了系统的稳定性和信号质量。仿真结果表明,该子连接有源RIS相较于全连接架构能够在牺牲6.7%~7.4%的总速率情况下实现25.0%~33.3%的能量效率提升,同时在能效方面比现有子连接架构也有11.1%~14.2%的提高,并在自干扰抑制方面表现优异,显著减轻了反馈型自干扰的影响,进一步验证了该架构在节能和抗干扰能力方面的优越性。
This paper proposes a precisely optimized sub-connected architecture to address the high power consumption and feedback-type self-interference issues in active fully-connected reconfigurable in‑telligent surface(RIS)systems.In this architecture,multiple RIS elements share power amplifiers,and beamforming design is carried out using techniques such as fractional programming and alternating direc‑tion method of multipliers.These can reduce the number of power amplifiers and lower power consumption.Further,a self-interference suppression mechanism is incorporated,and the optimization problem is sub‑sequently solved using the sequential unconstrained minimization technique,which improves the system’s stability and signal quality.Simulations show a 25.0%-33.3%energy efficiency gain with a 6.7%-7.4%rate reduction compared to the fully-connected architecture.Compared to existing sub-connected architec‑tures,it achieves an 11.1%-14.2%improvement in energy efficiency and significantly reduces the im‑pact of feedback-type self-interference,thereby validating its advantages in both energy efficiency and in‑terference suppression.
作者
王丹
肖卓婷
WANG Dan;XIAO Zhuoting(School of Communications and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)
出处
《南京邮电大学学报(自然科学版)》
2025年第5期23-30,共8页
Journal of Nanjing University of Posts and Telecommunications(Natural Science Edition)
基金
重庆市自然科学基金创新发展联合基金(中国星网)(CSTB2023NSCQ-LZX0114)资助项目。
关键词
可重构智能表面
有源RIS
子连接架构
自干扰抑制
reconfigurable intelligent surface(RIS)
active reconfigurable intelligent surface
subconnected architecture
self-interference suppression
作者简介
王丹,女,博士,正高级工程师,wangdan@cqupt.edu.cn。
