5 citations · 22 across the 43 of their papers we have counts for
24 papers · 1 filter
Channel Estimation in MIMO Systems Aided by Microwave Linear Analog Computers (MiLACs)
Qiaosen Zhang, Matteo Nerini, Bruno Clerckx
Microwave linear analog computers (MiLACs) have recently emerged as a promising solution for future gigantic multiple-input multiple-output (MIMO) systems, enabling beamforming wit…
Microwave Linear Analog Computer (MiLAC)-aided Multiuser MISO: Fundamental Limits and Beamforming Design
Zheyu Wu, Matteo Nerini, Bruno Clerckx
As wireless communication systems evolve toward the 6G era, ultra-massive/gigantic MIMO is envisioned as a key enabling technology. Recently, microwave linear analog computer (MiLA…
Movable Beyond-Diagonal Reconfigurable Intelligent Surfaces: Moving, Interconnecting, or Both?
Shuyue Xu, Matteo Nerini, Bruno Clerckx
This letter proposes a movable beyond-diagonal reconfigurable intelligent surfaces (MA-BD-RIS) design, combining inter-element connectivity and movability for channel enhancement.…
Beyond-Diagonal RIS Architecture Design and Optimization under Physics-Consistent Models
Zheyu Wu, Matteo Nerini, Bruno Clerckx
Reconfigurable intelligent surface (RIS) is a promising technology for future wireless communication systems. Conventional RIS is constrained to a diagonal scattering matrix, which…
Beyond-Diagonal RIS Prototype and Performance Evaluation
Jean Tapie, Matteo Nerini, Bruno Clerckx +1
We present the first experimental prototype of a reflective beyond-diagonal reconfigurable intelligent surface (BD-RIS), i.e., a RIS with reconfigurable inter-element connections.…
A Tutorial on Beyond-Diagonal Reconfigurable Intelligent Surfaces: Modeling, Architectures, System Design and Optimization, and Applications
Hongyu Li, Matteo Nerini, Shanpu Shen +1
Written by its inventors, this first tutorial on Beyond-Diagonal Reconfigurable Intelligent Surfaces (BD-RISs) provides the readers with the basics and fundamental tools necessary…
Low-Overhead Channel Estimation Framework for Beyond Diagonal Reconfigurable Intelligent Surface Assisted Multi-User MIMO Communication
Rui Wang, Shuowen Zhang, Bruno Clerckx +1
Beyond diagonal reconfigurable intelligent surface (BD-RIS) refers to a family of RIS architectures characterized by scattering matrices not limited to being diagonal and enables h…
T-Parameters Based Modeling for Stacked Intelligent Metasurfaces: Tractable and Physically Consistent Model
Hamad Yahya, Matteo Nerini, Bruno Clerckx +1
This work develops a physically consistent model for stacked intelligent metasurfaces (SIM) using multiport network theory and transfer scattering parameters (T-parameters). Unlike…
Lossy Beyond Diagonal Reconfigurable Intelligent Surfaces: Modeling and Optimization
Yiyang Peng, Hongyu Li, Zheyu Wu +1
Beyond diagonal reconfigurable intelligent surface (BD-RIS) has emerged as an advancement and generalization of the conventional diagonal RIS (D-RIS) by introducing tunable interco…
Beamforming and Waveform Optimization for RF Wireless Power Transfer with Beyond Diagonal Reconfigurable Intelligent Surfaces
Amirhossein Azarbahram, Onel L. A. Lopez, Bruno Clerckx +2
Radio frequency (RF) wireless power transfer (WPT) is a promising technology to seamlessly charge low-power devices, but its low end-to-end power transfer efficiency remains a crit…
Beyond Diagonal Reconfigurable Intelligent Surfaces for Multi-Carrier RF Wireless Power Transfer
Amirhossein Azarbahram, Onel L. A. López, Bruno Clerckx +2
Radio frequency (RF) wireless power transfer (WPT) is promising for promoting sustainability in future wireless systems, but its low end-to-end power transfer efficiency is a criti…
A Decoupled Channel Estimation Method for Beyond Diagonal RIS
Bruno Sokal, Fazal-E-Asim, André L. F. de Almeida +2
Beyond diagonal reconfigurable intelligent surface (BD-RIS) is a new architecture for RIS where elements are interconnected to provide more wave manipulation flexibility than tradi…
Optimization of Beyond Diagonal RIS: A Universal Framework Applicable to Arbitrary Architectures
Zheyu Wu, Bruno Clerckx
Reconfigurable intelligent surfaces (RISs) are envisioned as a promising technology for future wireless communication systems due to their ability to control the propagation enviro…
Non-reciprocal Beyond Diagonal RIS: Sum-Rate Maximization in Full-Duplex Communications
Ziang Liu, Hongyu Li, Bruno Clerckx
Reconfigurable intelligent surface (RIS) has been envisioned as a key technology in future wireless communication networks to enable smart radio environment. To further enhance the…
Non-Reciprocal Beyond Diagonal RIS: Multiport Network Models and Performance Benefits in Full-Duplex Systems
Hongyu Li, Bruno Clerckx
Beyond diagonal reconfigurable intelligent surfaces (BD-RIS) is a new advance in RIS techniques that introduces reconfigurable inter-element connections to generate scattering matr…
Beyond Diagonal RIS: Passive Maximum Ratio Transmission and Interference Nulling Enabler
Hamad Yahya, Hongyu Li, Matteo Nerini +2
Beyond diagonal reconfigurable intelligent surfaces (BD-RIS) generalizes and goes beyond conventional diagonal reconfigurable intelligent surfaces (D-RIS) by interconnecting elemen…
Channel Estimation for Beyond Diagonal RIS via Tensor Decomposition
André L. F. de Almeida, Bruno Sokal, Hongyu Li +1
This paper addresses the channel estimation problem for beyond diagonal reconfigurable intelligent surface (BD-RIS) from a tensor decomposition perspective. We first show that the…
MIMO Channel Shaping and Rate Maximization Using Beyond-Diagonal RIS
Yang Zhao, Hongyu Li, Bruno Clerckx +1
This paper investigates the limits to which a passive Reconfigurable Intelligent Surface (RIS) can reshape a point-to-point Multiple-Input Multiple-Output (MIMO) channel in terms o…
Full-Space Wireless Sensing Enabled by Multi-Sector Intelligent Surfaces
Yumeng Zhang, Xiaodan Shao, Hongyu Li +2
The multi-sector intelligent surface (IS), benefiting from a smarter wave manipulation capability, has been shown to enhance channel gain and offer full-space coverage in communica…
Beyond Diagonal Reconfigurable Intelligent Surfaces in Wideband OFDM Communications: Circuit-Based Modeling and Optimization
Hongyu Li, Matteo Nerini, Shanpu Shen +1
This work investigates the modeling and optimization of beyond diagonal reconfigurable intelligent surface (BD-RIS), which generalizes conventional RIS with diagonal phase shift ma…
Channel Estimation and Beamforming for Beyond Diagonal Reconfigurable Intelligent Surfaces
Hongyu Li, Shanpu Shen, Yumeng Zhang +1
Beyond diagonal reconfigurable intelligent surface (BD-RIS) is a new advance and generalization of the RIS technique. BD-RIS breaks through the isolation between RIS elements by cr…
Multi-functional OFDM Signal Design for Integrated Sensing, Communications, and Power Transfer
Yumeng Zhang, Sundar Aditya, Bruno Clerckx
The wireless domain is witnessing a flourishing of integrated systems, e.g. (a) integrated sensing and communications, and (b) simultaneous wireless information and power transfer,…
Beyond Diagonal Reconfigurable Intelligent Surfaces with Mutual Coupling: Modeling and Optimization
Hongyu Li, Shanpu Shen, Matteo Nerini +2
This work studies the modeling and optimization of beyond diagonal reconfigurable intelligent surface (BD-RIS) aided wireless communication systems in the presence of mutual coupli…
Learning Representations for CSI Adaptive Quantization and Feedback
Valentina Rizzello, Matteo Nerini, Michael Joham +2
In this work, we propose an efficient method for channel state information (CSI) adaptive quantization and feedback in frequency division duplexing (FDD) systems. Existing works ma…