Different from conventional wired line connections, industrial control through wireless transmission is widely regarded as a promising solution due to its reduced cost, increased long-term reliability, and enhanced reliability. However, mission-critical applications impose stringent quality of service (QoS) requirements that entail ultra-reliability low-latency communications (URLLC). The prima...

This paper investigates the impact of intelligent reflecting surface (IRS) enabled wireless secure transmission. Specifically, an IRS is deployed to assist multiple-input multiple-output (MIMO) system enhance secrecy performance, and artificial noise (AN) employed introduce interference degrade reception eavesdropper. To improve we aim maximize achievable rate, subject transmit power constraint...

Intelligent reflecting surface (IRS) is envisioned to be widely applied in future wireless networks. In this paper, we investigate a multi-user communication system assisted by cooperative IRS devices with the capability of energy harvesting. Aiming maximize long-term average achievable rate, an optimization problem formulated jointly designing transmit beamforming at base station (BS) and disc...

In this paper, an intelligent reflecting surface (IRS) is deployed to assist the terahertz (THz) communications. The sum-rate of user equipments (UEs) maximized while guaranteeing rate requirement each UE. A block coordinate searching (BCS) algorithm proposed jointly optimize IRS’s coordinates, phase shifts, THz sub-bands allocation and power control. Specifically, relaxation with penalt...

In this article, we consider covert beamforming design for intelligent reflecting surface (IRS)-assisted Internet-of-Things (IoT) networks, where Alice utilizes IRS to covertly transmit a message Bob without being recognized by Willie. We investigate the joint beamformer of and maximize rate when knowledge about Willie’s channel state information (WCSI) is perfect imperfect at Alice, res...

In this paper, the adoption of an intelligent reflecting surface (IRS) for multiple user pairs in two-hop networks is investigated. Different from existing studies on IRS that mainly focused tuning reflection coefficients all elements, we consider implementation true resource management (RRM) t...

In millimeter wave (mmWave) communication, lens antenna array has been considered as a potential technique to combat the severe path loss. However, blockage effect still exists. To address this issue, we design an intelligent reflecting surface (IRS) assisted wideband mmWave communication system with limited radio frequency (RF) chains. This is first attempt integration of IRS and array. The de...

In this letter, we consider an intelligent reflecting surface (IRS)-aided wireless communication system, where active or xmlns:xlink="http://www.w3.org/1999/xlink">passive IRS is employed to assist the between access point and a user. First, downlink/uplink separately optimize placement for...

Simultaneously transmitting/refracting and reflecting reconfigurable intelligent surface (STAR-RIS) has been introduced to achieve full coverage area. This paper investigate the performance of STAR-RIS assisted non-orthogonal multiple access (NOMA) networks over Rician fading channels, where incidence signals sent by base station are reflected transmitted nearby user distant user, respectively....