论文标题
超越对角线可重构智能表面的动态分组策略，并具有混合传输和反射模式
A Dynamic Grouping Strategy for Beyond Diagonal Reconfigurable Intelligent Surfaces with Hybrid Transmitting and Reflecting Mode
论文作者
论文摘要
除了对角线可重构智能表面（BD-RIS）是RIS的新型分支，它突破了传统RI的限制，并具有对角散射矩阵。但是，现有研究的重点是带有固定体系结构的BD-RIS，无论渠道状态信息（CSI）如何，这限制了BD-RIS的可实现性能。为了解决这个问题，在本文中，我们根据动态分组策略提出了一种新型的动态组合BD-RIS。具体而言，将RIS天线动态分为几个子集，以适应CSI，从而产生置换的块对基散射矩阵。为了验证所提出的动态组合BD-RIS的有效性，我们提出了一种有效的算法，以通过动态分组为BD-RIS辅助的多用户多输入单输出系统优化BD-RIS。仿真结果表明，所提出的动态组合体系结构的表现优于固定的组相互连接的架构。
Beyond diagonal reconfigurable intelligent surface (BD-RIS) is a novel branch of RIS which breaks through the limitation of traditional RIS with diagonal scattering matrices. However, the existing research focuses on BD-RIS with fixed architectures regardless of channel state information (CSI), which limit the achievable performance of BD-RIS. To solve this issue, in this paper, we propose a novel dynamically group-connected BD-RIS based on a dynamic grouping strategy. Specifically, RIS antennas are dynamically divided into several subsets adapting to the CSI, yielding a permuted block-diagonal scattering matrix. To verify the effectiveness of the proposed dynamically group-connected BD-RIS, we propose an efficient algorithm to optimize the BD-RIS with dynamic grouping for a BD-RIS-assisted multi-user multiple-input single-output system. Simulation results show that the proposed dynamically group-connected architecture outperforms fixed group-connected architectures.
