论文标题
可重构智能表面（RIS）：基于特征值分解的单独通道估计
Reconfigurable intelligent surface (RIS): Eigenvalue Decomposition-Based Separate Channel Estimation
论文作者
论文摘要
可重新配置的智能表面（RIS）最近引起了无线通信技术的重大关注。但是，在最近的研究中，在多输入多输出（MIMO）系统中识别，建模和估计RIS通道被认为具有挑战性。在本文中，根据特征值分解（EVD）概念提出了RIS-MIMO系统的拆卸通道估计框架，以分开级联的通道链接并分别估算每个链接。该估计基于将RIS-MIMO通道建模为钥匙孔MIMO系统模型。数值结果表明，所提出的估计方法的估计时间开销较低，同时提供较小的估计误差。
Reconfigurable intelligent surface (RIS) has recently drawn significant attention in wireless communication technologies. However, identifying, modeling, and estimating the RIS channel in multiple-input multiple-output (MIMO) systems are considered challenging in recent studies. In this paper, a disassembled channel estimation framework for the RIS-MIMO system is proposed based on the eigenvalue decomposition (EVD) concept to separate the cascaded channel links and estimate each link separately. This estimation is based on modeling the RIS-MIMO channel as a keyhole MIMO system model. Numerical results show that the proposed estimation method has a low estimation time overhead while providing less estimation error.
