In this paper, we consider an active reconfigurable intelligent surface (RIS) to assist the
multiuser downlink transmission in the presence of practical hardware impairments (HWIs) …

The use of reconfigurable intelligent surfaces (RISs) for optimization of propagation
channels is one of the most promising and revolutionizing techniques for improving …

Reconfigurable intelligent surfaces (RISs) are envisioned as a potentially transformative
technology for future wireless communications. However, RISs' inability to process signals …

In this paper, the covert communication system with the assistance of an active intelligent
reflecting surface (IRS) is investigated. Unlike the conventional passive IRS, which reflects …

Although the recently emerging reconfigurable intelligent surface (RIS) has exhibited great
potentials to enhance wireless communications, it has intrinsic defects as well, ie, the double …

We propose a new wireless paradigm for railways–transmissive metasurface (TMS) assisted
communications. It compensates for the Doppler shift brought by high mobility and reduces …

Reconfigurable intelligent surfaces (RISs) can establish favorable wireless environments to
combat the severe attenuation and blockages in millimeter-wave (mmWave) bands …

The widespread deployment of the Internet of Things (IoT) is promoting interest in
simultaneous wireless information and power transfer (SWIPT), the performance of which …

In this paper, we study the degrees of freedom (DoF) region and sum DoF of the time-
selective-user interference channel in the presence of intelligent reflecting surfaces (IRSs) …

ABSTRACT A digital coding metasurface is a platform connecting the digital space and
electromagnetic wave space, and has therefore gained much attention due to its intriguing …