论文标题
Trice：RIS辅助毫米波系统的通道估计框架
TRICE: A Channel Estimation Framework for RIS-Aided Millimeter-Wave MIMO Systems
论文作者
论文摘要
我们考虑了可点对点可重构智能表面（RIS）辅助毫米波（MMWAVE）MIMO系统中的通道估计问题。通过利用角域中MMWave通道的低级别性质，我们提出了一个非介绍性的两阶段RIS辅助通道估计（Trice）框架，其中每个阶段均以多维方向（DOA）估计问题进行表述。结果，我们的三级框架非常笼统，因为在每个阶段都可以轻松地使用任何有效的多维DOA估计解决方案来估计相关的通道参数。数值结果表明，与基准解决方案相比，Trice框架的开销较低，计算复杂性较低。
We consider the channel estimation problem in point-to-point reconfigurable intelligent surface (RIS)-aided millimeter-wave (mmWave) MIMO systems. By exploiting the low-rank nature of mmWave channels in the angular domains, we propose a non-iterative Two-stage RIS-aided Channel Estimation (TRICE) framework, where every stage is formulated as a multidimensional direction-of-arrival (DOA) estimation problem. As a result, our TRICE framework is very general in the sense that any efficient multidimensional DOA estimation solution can be readily used in every stage to estimate the associated channel parameters. Numerical results show that the TRICE framework has a lower training overhead and a lower computational complexity, as compared to benchmark solutions.
