Reconfigurable intelligent surfaces (RISs), also known as intelligent reflecting surfaces
(IRSs), or large intelligent surfaces (LISs), 1 have received significant attention for their …

Sixth generation (6G) internet of things (IoT) networks will modernize the applications and
satisfy user demands through implementing smart and automated systems. Intelligence …

In this letter, simultaneous transmitting and reflecting reconfigurable intelligent surfaces
(STAR-RISs) are studied. Compared with the conventional reflecting-only RISs, the …

Reconfigurable intelligent surfaces (RISs) are 2-D metasurfaces, which can intelligently
manipulate electromagnetic waves by low-cost near passive reflecting elements. RIS is …

A correlated transmission and reflection (T&R) phase-shift model is proposed for passive
lossless simultaneously transmitting and reflecting reconfigurable intelligent surfaces (STAR …

The demanding objectives for the future sixth generation (6G) of wireless communication
networks have spurred recent research efforts on novel materials and radio-frequency front …

Reconfigurable intelligent surface (RIS)-assisted power-domain non-orthogonal multiple
access (PD-NOMA) system has emerged as a revolutionary technology to enhance the …

Intelligent reflecting surface (IRS) composed of a large number of low-cost passive reflecting
elements has attracted significant attention from communication communities because of its …

In many core problems of signal processing and wireless communications, Karush-Kuhn-
Tucker (KKT) conditions based optimization plays a fundamental role. Hence we investigate …

Matrix-variate optimization plays a central role in advanced wireless system designs. In this
paper, we aim to explore optimal solutions of matrix variables under two special structure …