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Integrated sensing and communication (ISAC) has been receiving a notable interest as an energy- and spectrum-efficient enabler for simultaneous communication and sensing. Notably, reconfigurable intelligent surfaces (RIS) is among the key…

Information Theory · Computer Science 2026-04-07 Elmehdi Illi , Marwa Qaraqe

Beyond diagonal reconfigurable intelligent surface (BD-RIS) extends conventional RIS through novel architectures, such as group-connected RIS, with scattering matrix not restricted to being diagonal. However, it remains unexplored how to…

Information Theory · Computer Science 2024-05-08 Matteo Nerini , Shanpu Shen , Bruno Clerckx

Reconfigurable intelligent surfaces (RISs) enable programmable control of the wireless propagation environment and are key enablers for future networks. Beyond-diagonal RIS (BD-RIS) architectures enhance conventional RIS by interconnecting…

Information Theory · Computer Science 2026-05-04 Matteo Nerini , Zheyu Wu , Shanpu Shen , Bruno Clerckx

The sixth-generation (6G) wireless networks will rely on ultra-dense multi-cell deployment to meet the high rate and connectivity demands. However, frequency reuse leads to severe inter-cell interference, particularly for cell-edge users,…

Information Theory · Computer Science 2025-11-18 Shuo Zheng , Shuowen Zhang

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 creatively introducing inter-element connections, thereby…

Signal Processing · Electrical Eng. & Systems 2024-06-11 Hongyu Li , Shanpu Shen , Yumeng Zhang , Bruno Clerckx

Beyond Diagonal Reconfigurable Intelligent Surfaces (BD-RIS) represent a groundbreaking innovation in sixth-generation (6G) wireless networks, enabling unprecedented control over wireless propagation environments compared to conventional…

Beyond-diagonal reconfigurable intelligent surface (BD-RIS), which enables advanced wave control through interconnection of RIS elements, are gaining growing recognition as a promising technology for 6G and beyond. However, the enhanced…

Signal Processing · Electrical Eng. & Systems 2025-09-30 Xiaohua Zhou , Tianyu Fang , Yijie Mao , Bruno Clerckx

Benefiting from its capability to generalize existing reconfigurable intelligent surface (RIS) architectures and provide additional design flexibility via interactions between RIS elements, beyond-diagonal RIS (BD-RIS) has attracted…

Signal Processing · Electrical Eng. & Systems 2025-01-20 Xiaohua Zhou , Tianyu Fang , Yijie Mao

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 higher wave manipulation flexibility and large performance…

Signal Processing · Electrical Eng. & Systems 2025-04-16 Rui Wang , Shuowen Zhang , Bruno Clerckx , Liang Liu

Reconfigurable intelligent surface (RIS) is an emerging technology allowing to control the propagation environment in wireless communications. Recently, beyond diagonal RIS (BD-RIS) has been proposed to reach higher performance than…

Information Theory · Computer Science 2023-08-31 Matteo Nerini , Bruno Clerckx

A beyond-diagonal reconfigurable intelligent surface (BD-RIS) is an innovative type of reconfigurable intelligent surface (RIS) that has recently been proposed and is considered a revolutionary advancement in wave manipulation. Unlike the…

Social and Information Networks · Computer Science 2026-01-05 Abd Ullah Khan , Uman Khalid , Trung Q. Duong , Hyundong Shin

Beyond-diagonal reconfigurable intelligent surfaces (BD-RISs) significantly improve wireless performance by allowing tunable interconnections among elements, but their design in multiple-input multiple-output (MIMO) systems has so far…

Signal Processing · Electrical Eng. & Systems 2026-04-13 Ignacio Santamaria , Mohammad Soleymani , Jesus Gutierrez , Eduard Jorswieck

Beyond diagonal reconfigurable intelligent surface (BD-RIS) improves the traditional reconfigurable intelligent surface (RIS) architecture functionality by interconnecting elements for advanced wave control. However, real-world…

Signal Processing · Electrical Eng. & Systems 2025-06-10 Jose Carlos da Silva Filho , Josué V. de Araújo , Bruno Sokal , André L. F. de Almeida

Beyond diagonal reconfigurable intelligent surfaces (BD-RIS) have emerged as a transformative technology for enhancing wireless communication by intelligently manipulating the propagation environment. This paper explores the potential of…

Signal Processing · Electrical Eng. & Systems 2025-03-21 Wali Ullah Khan , Chandan Kumar Sheemar , Eva Lagunas , Symeon Chatzinotas

Beyond-diagonal reconfigurable intelligent surface (BD-RIS) has recently been introduced to enable advanced control over electromagnetic waves to further increase the benefits of traditional RIS in enhancing signal quality and improving…

Information Theory · Computer Science 2025-10-20 Binggui Zhou , Bruno Clerckx

A hybrid transmitting and reflecting beyond diagonal reconfigurable intelligent surface (BD-RIS) design is proposed. Operating in the same aperture, frequency band and polarization, the proposed BD-RIS features independent beam steering…

Signal Processing · Electrical Eng. & Systems 2025-04-15 Zhaoyang Ming , Shanpu Shen , Junhui Rao , Zan Li , Jichen Zhang , Chi Yuk Chiu , Ross Murch

Reconfigurable intelligent surface (RIS) provides a promising way to build programmable wireless transmission environments. Owing to the massive number of controllable reflecting elements on the surface, RIS is capable of providing…

Information Theory · Computer Science 2022-10-03 Xiaoyan Ma , Yuguang Fang , Haixia Zhang , Shuaishuai Guo , Dongfeng Yuan

This work initiates the study of a beyond-diagonal reconfigurable intelligent surface (BD-RIS)-aided transmitter architecture for integrated sensing and communication (ISAC) in the millimeter-wave (mmWave) frequency band. Deploying BD-RIS…

Information Theory · Computer Science 2024-04-29 Kexin Chen , Yijie Mao

The reconfigurable intelligent surface (RIS) has attracted considerable attention of both academia and industry in recent years, given its capacity to dynamically manipulate the reflection of incident electromagnetic waves. Although the…

Signal Processing · Electrical Eng. & Systems 2026-04-09 Pedro H. C. de Souza , Luciano Mendes

Beyond-diagonal reconfigurable intelligent surface (BD-RIS) has arisen as a promising technology for enhancing wireless communication systems by enabling flexible and intelligent wave manipulation. This is achieved through the…

Signal Processing · Electrical Eng. & Systems 2025-12-22 Ziang Liu , Bruno Clerckx