Spatial multiplexing in near field MIMO channels with reconfigurable intelligent surfaces

• Published in: IET signal processing Vol. 17; no. 3
• Main Authors: Bartoli, Giulio, Abrardo, Andrea, Decarli, Nicolo, Dardari, Davide, Di Renzo, Marco
• Format: Journal Article
• Language: English
• Published: John Wiley & Sons, Inc 01.03.2023; Institution of Engineering and Technology; Wiley
• Subjects: Communications equipment; Electromagnetism; Engineering Sciences; MIMO communication; MIMO communications; modulation; Numerical analysis; Signal and Image processing; modulation; MIMO communication

We consider a multiple‐input multiple‐output (MIMO) channel in the presence of a reconfigurable intelligent surface (RIS). Specifically, our focus is on analysing the spatial multiplexing gains in line‐of‐sight and low‐scattering MIMO channels in the near field. We prove that the channel capacity is...