Scholars are expected to continue enhancing the depth and breadth of theoretical research
on reconfigurable intelligent surface (RIS) to provide a higher theoretical limit for RIS …

This paper presented a novel millimeter-wave channel measurement platform for the 6G
intelligent railway. This platform used phased array antenna with 64 elements and can …

Cell-free (CF) massive multiple-input multiple-output (MIMO) is considered as a promising
technology for achieving the ultimate performance limit. However, due to its distributed …

Abstract Reconfigurable Intelligent Surface (RIS) is a foundational and innovative
technology, involving meta-materials, electromagnetic information, interface …

In this article, a 3D geometry-based millimeter-wave channel model is proposed for
reconfigurable intelligent surface (RIS)-assisted high-speed train communications …

High-speed train (HST) communications with reconfigurable intelligent surface (RIS)
techniques have caused extensive research in recent years. In this paper, we study the RIS …

This paper presents an overview of the challenges and state-of-the-art physical layer
enhancement designs for next-generation railway communication, also known as high …

High-speed train (HST) communications are challenging due to fast time-varying channels
and Doppler effects. Recently, reconfigurable intelligent surface (RIS) has been envisioned …

The railway mobile communication system is undergoing a smooth transition from the Global
System for Mobile Communications-Railway (GSM-R) to the Railway 5G. In this paper, an …

Cell-free massive multiple-input multiple-output (mMIMO) and extremely large-scale MIMO
(XL-MIMO) have been investigated as promising innovations for next-generation wireless …