Interference Characterization and Mitigation in Near-Field XL-MIMO: A Case for Linear and Circular Array Geometries

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Abstract

Extremely large-scale multiple-input multiple-output (XL-MIMO) introduces near-field communication regime due to its large antenna aperture in which spherical wavefronts and beam focusing replace conventional far-field assumptions. This shift significantly impacts interference behavior, especially for near-field users who are affected by both near- and far-field interferers. In this letter, we derive a closed-form expression for total interference and analyze the spectral efficiency for different array geometries. Our results reveal that uniform circular arrays (UCAs) outperform uniform linear arrays (ULAs) in the near-field by generating Bessel-like beams that enhance spatial focusing and significantly reduce interference.

Details

OriginalspracheEnglisch
Seiten (von - bis)111-115
Seitenumfang5
FachzeitschriftIEEE wireless communications letters
Jahrgang15
PublikationsstatusVeröffentlicht - 15 Okt. 2025
Peer-Review-StatusJa

Externe IDs

Scopus 105019578144
ORCID /0000-0003-3045-6271/work/203811320
ORCID /0000-0002-1315-7635/work/203813578
ORCID /0000-0001-7075-8990/work/203814565
ORCID /0000-0001-8165-5735/work/203814775

Schlagworte

Schlagwörter

  • Antenna arrays, Antennas, Correlation, Focusing, Geometry, Interference, Receiving antennas, Spectral efficiency, Transmitting antennas, Vectors