This paper deals with channel estimation in reconfigurable intelligent surface (RIS) aided
multiple-input multiple-output (MIMO) time-division duplexing systems. In a typical RIS …

In this paper, we consider a reconfigurable intelligent surface (RIS)-assisted two-way relay
network, in which two users exchange information through the base station (BS) with the …

The main difficulty concerning optimizing the mutual information (MI) in reconfigurable
intelligent surface (RIS)-aided communication systems with discrete signaling is the inability …

Reconfigurable intelligentsurface (RIS) has emerged as a cost-and energy-efficient solution
to enhance the wireless communications capacity. However, recent studies show that a very …

Intelligent reflecting surface (IRS) is a promising solution to enhance the wireless
communication capacity both cost-effectively and energy-efficiently, by properly altering the …

This paper focuses on the problem of reconfigurable intelligent surface (RIS) aided co-
design for multiple-input-multiple-output (MIMO) radar and MIMO communication systems …

Reconfigurable intelligent surface (RIS) or intelligent reflecting surface (IRS) has recently
been envisioned as one of the most promising technologies in the future sixth-generation …

Reconfigurable intelligent surface (RIS), a planar metasurface consisting of a large number
of low-cost reflecting elements, has received much attention due to its ability to improve both …

In this paper, we investigate a double-active-reconfigurable intelligent surface (RIS)-aided
downlink wireless communication system, where a multi-antenna base station (BS) serves …

Reconfigurable intelligent surface (RIS) provides a promising way to build programmable
wireless transmission environments. Owing to the massive number of controllable reflecting …