9 papers
On the Universal Approximation Capability of Stacked Intelligent Metasurfaces
Davide Dardari
Wave-domain processing is an emerging paradigm in which signal-processing operations are partially shifted from the digital domain to the electromagnetic (EM) domain to reduce comp…
OAM-Enabled Holographic MIMO Communications with Stacked Intelligent Metasurfaces
Giulia Torcolacci, Davide Dardari
This study investigates orbital angular momentum (OAM)-based holographic multiple-input multiple-output (HMIMO) links enabled by stacked intelligent metasurfaces (SIM) in the radia…
Human-Inspired Pavlovian and Instrumental Learning for Autonomous Agent Navigation
Jingfeng Shan, Francesco Guidi, Mehrdad Saeidi +8
Autonomous agents operating in uncertain environments must balance fast responses with goal-directed planning. Classical MF RL often converges slowly and may induce unsafe explorat…
Near-Field Wideband Localization using TTD-Based Terahertz Extremely Large-Scale Arrays
Qianyu Yang, Haiyang Zhang, Francesco Guidi +4
The synergy between extremely large-scale antenna arrays and terahertz technology in sixth-generation networks establishes a near-field wideband transmission environment, enabling…
A Cognitive Framework for Autonomous Agents: Toward Human-Inspired Design
Francesco Guidi, Jingfeng Shan, Mehrdad Saeidi +8
This work introduces a human-inspired reinforcement learning (RL) architecture that integrates Pavlovian and instrumental processes to enhance decision-making in autonomous systems…
Model Proficiency in Centralized Multi-Agent Systems: A Performance Study
Anna Guerra, Francesco Guidi, Pau Closas +2
Autonomous agents are increasingly deployed in dynamic environments where their ability to perform a given task depends on both individual and team-level proficiency. While profici…
Scalable RIS-Aided Beamforming Strategies for Near-Field MU-MISO via Multi-Antenna Feeder
Giulia Torcolacci, Malte Schellmann, Davide Dardari
This paper investigates a modular beamforming framework for reconfigurable intelligent surface (RIS)-aided multi-user (MU) communications in the near-field regime, built upon a nov…
Extremely Large-Scale Dynamic Metasurface Antennas for 6G Near-Field Networks: Opportunities and Challenges
Haiyang Zhang, Nir Shlezinger, Giulia Torcolacci +6
6G networks will need to support higher data rates, high-precision localization, and imaging capabilities. Near-field technologies, enabled by extremely large-scale (XL)-arrays, ar…
Dynamic Scattering Arrays for Simultaneous Electromagnetic Processing and Radiation in Holographic MIMO Systems
Davide Dardari
To meet the stringent requirements of next-generation wireless networks, multiple-input multiple-output (MIMO) technology is expected to become massive and pervasive. Unfortunately…