12 papers
Active Beyond-Diagonal RIS Empowered Heterogeneous Edge Computing: A Distributional Reinforcement Learning Approach
Tianyu Pang, Hongyu Li
The paper proposes a joint optimization framework for energy‑aware offloading and resource allocation in heterogeneous mobile edge computing systems aided by active beyond‑diagonal…
Sparse Channel Estimation for Pixel Antennas: Addressing the Pilot Rank Deficiency
Yiting Chen, Yumeng Zhang, Hongyu Li
Composed of multiple interconnected pixels controlled by on/off RF switches, the pixel antenna can generate reconfigurable radiation patterns that can be further exploited to const…
Antenna Coding Design for Pixel Antenna Empowered Rate-Splitting Multiple Access
Haobo Huang, Yijie Mao, Hongyu Li +1
This work explores the integration of pixel antennas and rate-splitting multiple access (RSMA) to enhance spectral efficiency in multi-user multiple-input single-output (MU-MISO) s…
Active Beyond-Diagonal Reconfigurable Intelligent Surfaces: Modeling, Architecture Design, and Optimization
Shanpu Shen, Hongyu Li, Matteo Nerini +2
Beyond-diagonal reconfigurable intelligent surfaces (BD-RISs) are an emerging RIS 2.0 technology for future wireless communication. However, BD-RISs are primarily passive without a…
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…
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…