21 papers
Performance Analysis and Joint Beamforming for Hybrid RIS-Aided Massive MIMO ISAC
Smriti Uniyal, Tianyu Fang, Marco Di Renzo +2
In integrated sensing and communication (ISAC) systems, stringent sensing performance constraints can severely limit the power available for communication. Hybrid reconfigurable in…
Energy Efficiency Maximization for Hybrid RIS-Aided Communications via Deep Unfolding
Pouya Mobaraki, Abolfazl Zakeri, Marco Di Renzo +2
We address energy-efficiency (EE) maximization in a multiuser (MU) multiple-input single-output (MISO) downlink system assisted by a hybrid reconfigurable intelligent surface(RIS),…
From Multi-Port Models to Cascade Structures: Optimization of Active Unilateral Stacked Intelligent Metasurfaces
Andrea Abrardo, Giulio Bartoli, Marco Di Renzo +1
This paper develops a multi-port S-parameter framework for the analysis and optimization of stacked intelligent metasurfaces (SIMs) with unilateral active interconnections. By mode…
Airy beams for radiative near-field communications: Fundamentals, potentials, and limitations
Donatella Darsena, Francesco Verde, Marco Di Renzo +1
In next-generation wireless networks, the combination of electrically large radiating apertures and high-frequency transmission extends the radiating near-field region around the t…
Sparse Channel Estimation for SIM-based mmWave Near-Field Communications
Jiancheng An, Enyu Shi, Jiayi Zhang +4
In this paper, we address the channel estimation (CE) problem in SIM-based multi-user (MU) millimeter-wave (mmWave) near-field communication systems. To address the severe path los…
Reliable Narrowband Interference Detection via Backward Conformal Prediction
Xin Su, Meiyi Zhu, Osvaldo Simeone +2
Narrowband interference can severely degrade the performance of WiFi links by concentrating significant power on a small portion of the channel. Machine learning (ML) detectors tra…