Recently, dynamic metasurface antennas (DMAs) have emerged as a promising technology for realizing massive multipleinput multiple-output (MIMO) wireless systems. The usage of large arrays, jointly with higher transmitted frequencies, often results in the communicating devices operating in the near-field (Fresnel) region, thus requiring different considerations compared to traditional systems, assumed to operate in the far-field regime. In this paper, we study the potential of beam focusing, feasible in near-field operation, for multiuser MIMO systems, where the base station is equipped with a DMA. We introduce a mathematical model for DMA-based near-field MIMO communications. Then, we characterize the sum-rate maximization problem of the considered system, and propose an efficient solution to jointly design the DMA weights and digital precoding vector. Simulation results show that our design generates focused beams such that users residing at the same angular direction can communicate reliably without interfering, which is not achievable using conventional far-field beam steering.

Beam Focusing for Multi-User MIMO Communications with Dynamic Metasurface Antennas / Zhang H.; Shlezinger N.; Guidi F.; Dardari D.; Imani M.F.; Eldar Y.C.. - ELETTRONICO. - 2021-:(2021), pp. 4780-4784. (Intervento presentato al convegno 2021 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2021 tenutosi a Canada nel Jun. 2021) [10.1109/ICASSP39728.2021.9413746].

Beam Focusing for Multi-User MIMO Communications with Dynamic Metasurface Antennas

Guidi F.;Dardari D.;
2021

Abstract

Recently, dynamic metasurface antennas (DMAs) have emerged as a promising technology for realizing massive multipleinput multiple-output (MIMO) wireless systems. The usage of large arrays, jointly with higher transmitted frequencies, often results in the communicating devices operating in the near-field (Fresnel) region, thus requiring different considerations compared to traditional systems, assumed to operate in the far-field regime. In this paper, we study the potential of beam focusing, feasible in near-field operation, for multiuser MIMO systems, where the base station is equipped with a DMA. We introduce a mathematical model for DMA-based near-field MIMO communications. Then, we characterize the sum-rate maximization problem of the considered system, and propose an efficient solution to jointly design the DMA weights and digital precoding vector. Simulation results show that our design generates focused beams such that users residing at the same angular direction can communicate reliably without interfering, which is not achievable using conventional far-field beam steering.
2021
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
4780
4784
Beam Focusing for Multi-User MIMO Communications with Dynamic Metasurface Antennas / Zhang H.; Shlezinger N.; Guidi F.; Dardari D.; Imani M.F.; Eldar Y.C.. - ELETTRONICO. - 2021-:(2021), pp. 4780-4784. (Intervento presentato al convegno 2021 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2021 tenutosi a Canada nel Jun. 2021) [10.1109/ICASSP39728.2021.9413746].
Zhang H.; Shlezinger N.; Guidi F.; Dardari D.; Imani M.F.; Eldar Y.C.
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/863527
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 16
  • ???jsp.display-item.citation.isi??? 9
social impact