6G networks; near-field communications; Reconfigurable intelligent surface (RIS); stacked intelligent metasurfaces (SIM); 6g network; Array signal processing; Metasurface; Multiple-input multiple-output communications; Near-field communication; Precoding; Reconfigurable; Reconfigurable intelligent surface; Stacked intelligent metasurface; Transmitting antenna; Control and Systems Engineering; Electrical and Electronic Engineering
Abstract :
[en] Stacked intelligent metasurfaces (SIMs) have recently gained significant interest since they enable precoding in the wave domain that comes with increased processing capability and reduced energy consumption. The study of SIMs and high frequency propagation make the study of the performance in the near field of crucial importance. Hence, in this letter, we focus on SIM-assisted multiuser multiple-input multiple-output (MIMO) systems operating in the near field region. To this end, we formulate the weighted sum rate maximization problem in terms of the transmit power and the phase shifts of the SIM. By applying a block coordinate descent (BCD)-relied algorithm, numerical results show the enhanced performance of the SIM in the near field with respect to the far field.
Disciplines :
Computer science
Author, co-author :
Papazafeiropoulos, Anastasios ; University of Hertfordshire, Communications and Intelligent Systems Research Group, Hatfield, United Kingdom ; University of Luxembourg, Interdisciplinary Centre for Security, Reliability and Trust, Esch-sur-Alzette, Luxembourg
Kourtessis, Pandelis ; University of Hertfordshire, Communications and Intelligent Systems Research Group, Hatfield, United Kingdom
CHATZINOTAS, Symeon ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
Kaklamani, Dimitra I.; Microwave and Fiber Optics Laboratory, Electrical and Computer Engineering, Athens, Greece
Venieris, Iakovos S.; National Technical University of Athens, Zografou Campus, Intelligent Communications and Broadband Networks Laboratory, School of Electrical and Computer Engineering, Athens, Greece
External co-authors :
yes
Language :
English
Title :
Near-Field Beamforming for Stacked Intelligent Metasurfaces-Assisted MIMO Networks
Publication date :
2024
Journal title :
IEEE Wireless Communications Letters
ISSN :
2162-2337
eISSN :
2162-2345
Publisher :
Institute of Electrical and Electronics Engineers Inc.
University of Hertfordshire’s 5-year Vice Chancellor’s Research Fellowship National Research Fund, Luxembourg, under the project RISOTTI
Funding text :
The work of Anastasios Papazafeiropoulos was supported by the University of Hertfordshire's 5-year Vice Chancellor's Research Fellowship. The work of Symeon Chatzinotas was supported by the National Research Fund, Luxembourg, under the project RISOTTI. The associate editor coordinating the review of this article and approving it for publication was F. Zhou.
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