8 papers
Reduced-Observation Approximation of Near-Field Gaussian Covariance Matrices
Marco Moretti
Near-field covariance matrices are central to local- ization, covariance-aware estimation, and linear MMSE filtering in large-aperture arrays, but Gaussian position uncertainty req…
Edge Intelligence for Satellite-based Earth Observation: Scheduling Image Acquisition and Processing
Beatriz Soret, Antonio M. Mercado-Martínez, Antonio Jurado-Navas +4
Modern Earth Observation (EO) missions generate massive volumes of imagery that challenge existing downlink and ground-processing capabilities, particularly for time-critical appli…
Near-Field MMSE Channel Estimation for THz RIS-aided Communications with Electromagnetic Interference
Wen-Xuan Long, Marco Moretti, Giacomo Bacci +1
This letter investigates the channel estimation problem in THz wireless communications where a RIS is employed to assist wireless transmission between different devices. Unlike exi…
Doppler-Robust Vortex Wavefront Design for Integrated Sensing and Communication
Yuan Liu, Wen-Xuan Long, M. R. Bhavani Shankar +3
Integrated sensing and communication (ISAC) is a promising paradigm for future wireless systems due to spectrum reuse, hardware sharing, and joint waveform design. In dynamic scene…
Channel Estimation for 6G Near-Field Wireless Communications: A Comprehensive Survey
Wen-Xuan Long, Shengyu Ye, Marco Moretti +4
The sixth-generation (6G) wireless systems are expected to adopt extremely large aperture arrays (ELAAs), novel antenna architectures, and operate in extremely high-frequency bands…
Parametric Near-Field MMSE Channel Estimation for sub-THz XL-MIMO Systems
Wen-Xuan Long, Marco Moretti, Michele Morelli +2
Accurate channel estimation is essential for reliable communication in sub-THz extremely large (XL) MIMO systems. Deploying XL-MIMO in high-frequency bands not only increases the n…
Power Minimization with Rate Constraints for Multi-User MIMO Systems with Large-Size RISs
Silvia Palmucci, Giulio Bartoli, Andrea Abrardo +2
This study focuses on the optimization of a single-cell multi-user multiple-input multiple-output (MIMO) system with multiple large-size reconfigurable intelligent surfaces (RISs).…
MMSE Design of RIS-aided Communications
Wen-Xuan Long, Marco Moretti, Andrea Abrardo +2
Consider a communication system in which a single antenna user equipment exchanges information with a multi-antenna base station via a reconfigurable intelligent surface (RIS) in t…