5 citations · 22 across the 43 of their papers we have counts for
23 papers · 1 filter
Can Reciprocal RIS Perform as Non-Reciprocal RIS?
Matteo Nerini, Juan Vidal Alegría, Bruno Clerckx
Yes, if and only if some optimal non-reciprocal RIS (i.e., maximizing a given performance metric) makes the round-trip channel transmitter-RIS-transmitter symmetric, which holds if…
Microwave Linear Analog Computers (MiLACs) for Communications: Opportunities and Challenges
Matteo Nerini, Bruno Clerckx
Future wireless systems will require ever larger antenna arrays and heavier signal processing, making conventional digital multiple-input multiple-output (MIMO) architectures diffi…
Physics-Compliant Modeling and Optimization of MIMO Systems Aided by Microwave Linear Analog Computers
Matteo Nerini, Bruno Clerckx
Microwave linear analog computer (MiLAC) has emerged as a promising architecture for implementing linear multiple-input multiple-output (MIMO) processing in the analog domain, with…
Movable Signals with Dual-Polarized Fixed Intelligent Surfaces: Beyond Diagonal Reflection Matrices
Matteo Nerini, Bruno Clerckx
This paper investigates wireless systems aided by dual-polarized intelligent surfaces. We compare reconfigurable intelligent surface (RIS), which adjust their reflection matrices,…
An AMP-Based Asymptotic Analysis For Nonlinear One-Bit Precoding
Zheyu Wu, Junjie Ma, Ya-Feng Liu +1
This paper focuses on the asymptotic analysis of a class of nonlinear one-bit precoding schemes under Rayleigh fading channels. The considered scheme employs a convex-relaxation-th…
Capacity of Two-User Wireless Systems Aided by Movable Signals
Matteo Nerini, Bruno Clerckx
Movable signals have emerged as a third approach to enable smart radio environments (SREs), complementing reconfigurable intelligent surfaces (RISs) and flexible antennas. This pap…
Low-Complexity Planar Beyond-Diagonal RIS Architecture Design Using Graph Theory
Matteo Nerini, Zheyu Wu, Shanpu Shen +1
Reconfigurable intelligent surfaces (RISs) enable programmable control of the wireless propagation environment and are key enablers for future networks. Beyond-diagonal RIS (BD-RIS…
Enabling Smart Radio Environments in the Frequency Domain With Movable Signals
Matteo Nerini, Bruno Clerckx
Smart radio environments (SREs) enhance wireless communications by allowing control over the channel. They have been enabled through surfaces with reconfigurable electromagnetic (E…
Asymptotic Analysis of Nonlinear One-Bit Precoding in Massive MIMO Systems via Approximate Message Passing
Zheyu Wu, Junjie Ma, Ya-Feng Liu +1
Massive multiple-input multiple-output (MIMO) systems employing one-bit digital-to-analog converters offer a hardware-efficient solution for wireless communications. However, the o…
Capacity of MIMO Systems Aided by Microwave Linear Analog Computers (MiLACs)
Matteo Nerini, Bruno Clerckx
Future wireless systems, known as gigantic multiple-input multiple-output (MIMO), are expected to enhance performance by significantly increasing the number of antennas, e.g., a fe…
MIMO Systems Aided by Microwave Linear Analog Computers: Capacity-Achieving Architectures with Reduced Circuit Complexity
Matteo Nerini, Bruno Clerckx
To meet the demands of future wireless networks, antenna arrays must scale from massive multiple-input multiple-output (MIMO) to gigantic MIMO, involving even larger numbers of ant…
Analog Computing for Signal Processing and Communications -- Part II: Toward Gigantic MIMO Beamforming
Matteo Nerini, Bruno Clerckx
Analog-domain operations offer a promising solution to accelerating signal processing and enabling future multiple-input multiple-output (MIMO) communications with thousands of ant…
Analog Computing for Signal Processing and Communications -- Part I: Computing with Microwave Networks
Matteo Nerini, Bruno Clerckx
Analog computing has been recently revived due to its potential for energy-efficient and highly parallel computations. In this two-part paper, we explore analog computers that line…
Beyond Diagonal RIS in Multiuser MIMO: Graph Theoretic Modeling and Optimal Architectures with Low Complexity
Zheyu Wu, Bruno Clerckx
Reconfigurable intelligent surfaces (RIS) is regarded as a key enabler of wave/analog-domain beamforming, processing, and computing in future wireless communication systems. Recent…
Dual-Polarized Beyond Diagonal RIS
Matteo Nerini, Bruno Clerckx
Beyond diagonal reconfigurable intelligent surface (BD-RIS) is a family of RIS architectures more flexible than conventional RIS. While BD-RIS has been primarily analyzed assuming…
Physics-Compliant Modeling and Scaling Laws of Multi-RIS Aided MIMO Systems
Matteo Nerini, Gabriele Gradoni, Bruno Clerckx
Reconfigurable intelligent surface (RIS) enables the control of wireless channels to improve coverage. To further extend coverage, multi-RIS aided systems have been explored, where…
Global Optimal Closed-Form Solutions for Intelligent Surfaces With Mutual Coupling: Is Mutual Coupling Detrimental or Beneficial?
Matteo Nerini, Hongyu Li, Bruno Clerckx
Reconfigurable Intelligent Surface (RIS) is a breakthrough technology enabling the dynamic control of the propagation environment in wireless communications through programmable su…
Physics-Compliant Modeling and Scaling Laws of Multi-RIS Aided Systems
Matteo Nerini, Gabriele Gradoni, Bruno Clerckx
Reconfigurable intelligent surface (RIS) is a revolutionary technology enabling the control of wireless channels and improving coverage in wireless networks. To further extend cove…
Wideband Modeling and Beamforming for Beyond Diagonal Reconfigurable Intelligent Surfaces
Hongyu Li, Matteo Nerini, Shanpu Shen +1
This work studies the wideband modeling and beamforming design of beyond diagonal reconfigurable intelligent surface (BD-RIS), which generalizes and goes beyond conventional RIS wi…
Static Grouping Strategy Design for Beyond Diagonal Reconfigurable Intelligent Surfaces
Matteo Nerini, Shanpu Shen, Bruno Clerckx
Beyond diagonal reconfigurable intelligent surface (BD-RIS) extends conventional RIS through novel architectures, such as group-connected RIS, with scattering matrix not restricted…
Physically Consistent Modeling of Stacked Intelligent Metasurfaces Implemented with Beyond Diagonal RIS
Matteo Nerini, Bruno Clerckx
Stacked intelligent metasurface (SIM) has emerged as a technology enabling wave domain beamforming through multiple stacked reconfigurable intelligent surfaces (RISs). SIM has been…
Localized and Distributed Beyond Diagonal Reconfigurable Intelligent Surfaces with Lossy Interconnections: Modeling and Optimization
Matteo Nerini, Golsa Ghiaasi, Bruno Clerckx
Reconfigurable intelligent surface (RIS) is a key technology to control the communication environment in future wireless networks. Recently, beyond diagonal RIS (BD-RIS) emerged as…
A Universal Framework for Multiport Network Analysis of Reconfigurable Intelligent Surfaces
Matteo Nerini, Shanpu Shen, Hongyu Li +2
Reconfigurable intelligent surface (RIS) is an emerging paradigm able to control the propagation environment in wireless systems. Most of the research on RIS has been dedicated to…