29 citations · 77 across the 23 of their papers we have counts for
13 papers · 1 filter
MMSE Design of RIS-aided Communications
Wen-Xuan Long, Marco Moretti, Andrea Abrardo +2
Consider a communication system in which a single antenna user equipment exchanges information with a multi-antenna base station via a reconfigurable intelligent surface (RIS) in t…
Analysis and Optimization of Reconfigurable Intelligent Surfaces Based on -Parameters Multiport Network Theory
Andrea Abrardo, Alberto Toccafondi, Marco Di Renzo
In this paper, we consider a reconfigurable intelligent surface (RIS) and model it by using multiport network theory. We first compare the representation of RIS by using -parame…
Spatial Multiplexing in Near Field MIMO Channels with Reconfigurable Intelligent Surfaces
Giulio Bartoli, Andrea Abrardo, Nicolo Decarli +2
We consider a multiple-input multiple-output (MIMO) channel in the presence of a reconfigurable intelligent surface (RIS). Specifically, our focus is on analyzing the spatial multi…
Two-Timescale Joint Precoding Design and RIS Optimization for User Tracking in Near-Field MIMO Systems
Silvia Palmucci, Anna Guerra, Andrea Abrardo +1
In this paper, we propose a novel framework that aims to jointly design the reflection coefficients of multiple RISs and the precoding strategy of a single BS to optimize the self-…
MIMO Interference Channels Assisted by Reconfigurable Intelligent Surfaces: Mutual Coupling Aware Sum-Rate Optimization Based on a Mutual Impedance Channel Model
Andrea Abrardo, Davide Dardari, Marco Di Renzo +1
We investigate a multi-user multiple-input multiple-output interference network in the presence of multiple reconfigurable intelligent surfaces (RISs). The entire system is describ…
Intelligent Reflecting Surfaces: Sum-Rate Optimization Based on Statistical CSI
Andrea Abrardo, Davide Dardari, Marco Di Renzo
In this paper, we consider a multi-user multiple-input multiple-output (MIMO) system aided by multiple intelligent reflecting surfaces (IRSs) that are deployed to increase the cove…