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 work, we study a simultaneous transmitting and reflecting reconfigurable intelligent surface (RIS)-assisted multiple-input multiple-output network. For the system under consideration, maximize weighted sum rate, mainly based on energy splitting (ES) scheme. To tackle optimization problem, sub-optimal block coordinate descent (BCD) algorithm is proposed to design precoding matrices coeff...