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Although reconfigurable intelligent surface (RIS) is a promising technology for shaping the propagation environment, it consists of a single-layer structure within inherent limitations regarding the number of beam steering patterns. Based…

Intelligent metasurface has recently emerged as a promising technology that enables the customization of wireless environments by harnessing large numbers of low-cost reconfigurable scattering elements. However, prior studies have…

信息论 · 计算机科学 2025-05-05 Jiancheng An , Marco Di Renzo , Mérouane Debbah , H. Vincent Poor , Chau Yuen

Cascaded or stacked intelligent metasurfaces (SIMs) have emerged as a promising technology to overcome the physical limitations of single-layer reconfigurable intelligent surfaces (RISs) in wideband wireless communication. By intelligently…

信息论 · 计算机科学 2026-03-02 Muhammad Ibrahim , Amine Mezghani , Ekram Hossain

Stacked intelligent metasurface (SIM) extends the concept of single-layer reconfigurable holographic surfaces (RHS) by incorporating a multi-layered structure, thereby providing enhanced control over electromagnetic wave propagation and…

信号处理 · 电气工程与系统科学 2025-07-24 Junjie Fang , Chao Zhang , Jiancheng An , Hongwen Yu , Qingqing Wu , Mérouane Debbah , Chau Yuen

This paper investigates a downlink multiuser multiple-input single-output system that integrates rate-splitting multiple access (RSMA) with a stacked intelligent metasurface (SIM) to enable wave-domain beamforming. Unlike conventional…

系统与控制 · 电气工程与系统科学 2025-11-17 Abdullah Quran , Shimaa Naser , Maryam Tariq , Omar Alhussein , Sami Muhaidat

Stacked intelligent metasurfaces (SIMs) represent a novel signal processing paradigm that enables over-the-air processing of electromagnetic waves at the speed of light. Their multi-layer architecture exhibits customizable computational…

信息论 · 计算机科学 2025-04-01 Hao Liu , Jiancheng An , George C. Alexandropoulos , Derrick Wing Kwan Ng , Chau Yuen , Lu Gan

Stacked intelligent metasurfaces (SIM) have recently emerged as a promising technology, which can realize transmit precoding in the wave domain. In this paper, we investigate a SIM-aided integrated sensing and communications system, in…

The stacked intelligent metasurface (SIM) emerges as an innovative technology with the ability to directly manipulate electromagnetic (EM) wave signals, drawing parallels to the operational principles of artificial neural networks (ANN).…

信号处理 · 电气工程与系统科学 2025-09-26 Xiaolei Yang , Jiayi Zhang , Enyu Shi , Ziheng Liu , Jun Liu , Kang Zheng , Bo Ai

The intelligent reflecting surface (IRS) is a planar array with massive reconfigurable passive elements, which can align the reflecting signals at the receivers via controlling the phase shifts at each element independently. Since IRS can…

信号处理 · 电气工程与系统科学 2020-10-22 Silei Wang , Qiang Li , Sissi Xiaoxiao Wu , Jingran Lin

Dynamic Metasurface Antennas (DMAs) have emerged as promising candidates for basestation deployment in the next generation of wireless communications. While overlooking the practical and hardware limitations of DMA, previous studies have…

信号处理 · 电气工程与系统科学 2024-07-31 Maryam Rezvani , Raviraj Adve , Amr El-Keyi , Akram bin Sediq

We consider stacked intelligent metasurfaces (SIMs) as a tool to improve the performance of bistatic integrated sensing and communications (ISAC) schemes. To that end, we optimize the SIMs and design a radar parameter estimation (RPE)…

The technology of Reconfigurable Intelligent Surfaces (RISs) has lately attracted considerable interest from both academia and industry as a low-cost solution for coverage extension and signal propagation control. In this paper, we study…

信息论 · 计算机科学 2022-08-03 Konstantinos D. Katsanos , Paolo Di Lorenzo , George C. Alexandropoulos

Reconfigurable intelligent surfaces have emerged as a cutting-edge technology for next-generation wireless communications that are capable of reconfiguring the wireless environment using a large number of cost-effective reflecting elements.…

信号处理 · 电气工程与系统科学 2026-03-31 Ahmed M. Benaya , Ali A. Nasir , Khaled M. Rabie , Daniel B. da Costa

A novel technology based on stacked intelligent metasurfaces (SIM) has recently emerged. This platform involves cascading multiple metasurfaces, each acting as a digitally programmable physical layer within a diffractive neural network. SIM…

信号处理 · 电气工程与系统科学 2025-01-06 Donatella Darsena , Francesco Verde , Ivan Iudice , Vincenzo Galdi

Stacked intelligent metasurfaces (SIMs), which integrate multiple programmable metasurface layers, have recently emerged as a promising technology for advanced wave-domain signal processing. SIMs benefit from flexible spatial…

Stacked intelligent metasurface (SIM) is an emerging design that consists of multiple layers of metasurfaces. A SIM enables holographic multiple-input multiple-output (HMIMO) precoding in the wave domain, which results in the reduction of…

Stacked intelligent metasurfaces (SIMs) have recently emerged as an effective solution for next-generation wireless networks. A SIM comprises multiple metasurface layers that enable signal processing directly in the wave domain. Moreover,…

信号处理 · 电气工程与系统科学 2025-11-11 Ahmed Magbool , Vaibhav Kumar , Marco Di Renzo , Mark F. Flanagan

Stacked intelligent metasurface (SIM), which consists of multiple layers of intelligent metasurfaces, is emerging as a promising solution for future wireless communication systems. In this timely context, we focus on broadcast…

信息论 · 计算机科学 2025-10-22 Nemanja Stefan Perović , Eduard E. Bahingayi , Le-Nam Tran

Reconfigurable intelligent surface has recently emerged as a promising technology for shaping the wireless environment by leveraging massive low-cost reconfigurable elements. Prior works mainly focus on a single-layer metasurface that lacks…

信息论 · 计算机科学 2023-02-15 Jiancheng An , Marco Di Renzo , Merouane Debbah , Chau Yuen

Reconfigurable intelligent surfaces (RISs) enable programmable control of wireless propagation. Beyond environmental deployments, integrating metasurfaces at the antenna front end allows direct manipulation of the radiated electromagnetic…

信号处理 · 电气工程与系统科学 2026-03-09 Chandan Kumar Sheemar , Wali Ullah Khan , Sourabh Solanki , George C. Alexandropoulos , Symeon Chatzinotas
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