This letter investigates machine learning approach for the joint optimal phase shift and
beamforming in the reconfigurable intelligent surface (RIS) assisted multiple-input and …

Reconfigurable intelligent surfaces (RISs) are capable of enhancing the capacity of wireless
networks at a low cost. In practical RIS-assisted communication systems, the acquisition of …

The ideal phase shift model and the acquisition of channel state information (CSI) are
practically difficult to realize in reconfigurable intelligent surface (RIS) assisted …

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 …

We examine the problem of joint active and passive beamforming in a controllable multi-
user reconfigurable intelligent surface (RIS)-assisted downlink and uplink wireless …

A simultaneous transmitting and reflecting reconfigurable intelligent surface (STAR-RIS)
assisted multi-user downlink multiple-input single-output (MISO) communication system is …

This letter consider a reconfigurable intelligent surface (RIS) aided multi-user multiple-input
single-output (MISO) downlink system, where transmit beamforming and phase shifts of RIS …

We introduce a novel deep reinforcement learning (DRL) approach to jointly optimize
transmit beamforming and reconfigurable intelligent surface (RIS) phase shifts in a multiuser …

Reconfigurable intelligent surface (RIS) is a promising solution to programmable wireless
channels. However, most existing RIS phase optimization algorithms, relying on iterative …

Reconfigurable intelligent surface (RIS) has become a promising technology to realize the
programmable wireless environment via steering the incident signal in fully customizable …