北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2025, Vol. 48 ›› Issue (1): 114-119.

• 研究报告 • 上一篇    下一篇

有源可重构智能表面拓扑优化及自干扰消除方案

唐菁敏1,  陶 梅1,  宋耀莲1,  虞贵财2   

  1. 1. 昆明理工大学 信息工程与自动化学院 2. 宜春学院 物理科学与工程技术学院
  • 收稿日期:2023-10-16 修回日期:2024-01-16 出版日期:2025-02-26 发布日期:2025-02-25
  • 通讯作者: 唐菁敏 E-mail:tang_min213@163.com
  • 基金资助:
    国家自然科学基金项目

Active Reconfigurable Intelligent Surface Topology Optimization and Self-interference Elimination Scheme

TANG Jinmin1,  TAO Mei1,  SONG Yaolian1,  YU Guicai2   

  • Received:2023-10-16 Revised:2024-01-16 Online:2025-02-26 Published:2025-02-25

摘要: 为抑制有源可重构智能表面(RIS)元件间存在的自干扰,进一步提升系统容量,提出一种联合优化有源RIS拓扑结构和预编码设计方案。所提方案在考虑基站和有源RIS的最大功率约束条件下,以加权总和速率(WSR)最大化为准则建立优化问题。为解决该非凸问题,将此问题分解为有源RIS拓扑和预编码设计两个子问题,并利用自适应禁忌搜索、拉格朗日乘子法和二进制搜索等算法对子问题转换求解后交替迭代优化,得出原非凸问题的近似次优解。仿真结果表明,理想情况下所提方案的WSR比常规方案提高了3.75bit·s-1·Hz-1。在存在自干扰情况下,所提方案对比理想状态下的WSR仅下降0.46%,而常规方案下降了1.6%,从而验证所提方案能有效抑制有源元件间的自干扰。

关键词: 无线通信, 有源可重构智能表面, 加权总和速率, 自干扰抑制, 拓扑结构设计

Abstract: In order to suppress the self-interference between active reconfigurable intelligent surface (RIS) components and further improve the system capacity, a joint optimization scheme for active RIS topology and precoding design is proposed. Under the maximum power constraints of base station and active RIS, the optimization problem is established based on the criterion of maximum weighted sum-rate (WSR). In order to solve the non-convex problem, the problem is decomposed into two subproblems, active RIS topology and precoding design. The subproblems are transformed and iteratively optimized by using adaptive tabu search, Lagrange multiplier method and binary search algorithm, and an approximate suboptimal solution for the non-convex problem is obtained. The simulation results show that the WSR of the proposed scheme is 3.75 bit·s-1·Hz-1 higher than that of the conventional scheme under ideal conditions. In the case of self-interference, the WSR of the proposed scheme only decreases by 0.46% compared with that of the ideal scheme versus 1.6% drop in the conventional scheme, demonstrating that the proposed scheme can effectively mitigate the self-interference between active elements.

Key words: wireless communication, active reconfigurable intelligent surface, weighted summation rate, self-interference suppression, topological structure design

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