In this paper, we investigate a reconfigurable intelligent surface (RIS) assisted downlink
orthogonal frequency division multiplexing (OFDM) transmission system. Taking into …

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

DRL has evolved as an effective approach to optimize the performance of various wireless
communication systems. DRL is considered a potential candidate to optimize the RIS phase …

Doppler-shift-induced channel aging effect significantly erodes the system performance due
to the channel mismatch that evolves with time. This paper aims to investigate the joint …

As the fifth-generation mobile communication system (5G) is commercially available,
countries around the world have gradually launched research plans for the sixth-generation …

This paper aims to maximize the weighted sum rate of a multi-user multiple-input single-
output system that is assisted by reconfigurable intelligent surfaces (RIS). However …

Practical hardware limitations often impose a reduced number of available phase shifts at
the elements of a reconfigurable intelligent surface (RIS). Most works often assume …

This letter presents a novel joint beamforming algorithm for reconfigurable intelligent
surfaces (RIS) in multiuser multiple-input single-output (MISO) wireless communications. At …

Reconfigurable intelligent surface (RIS) has become a focal point of extensive research due
to its remarkable “squared gain”. However, achieving a substantial beamforming gain …

Intelligent reconfigurable surfaces (IRSs) can enhance the communication performance by
smartly reconfiguring the wireless communication environment. In particular, the phase shifts …