The large number of individually controlled antennas in large-scale MIMO systems makes the complexity of uplink receive combining a serious challenge. This is why simple methods, such as maximum ratio combining, are often considered, even if lower spectral efficiency is attained. In this paper, we investigate the performance of a reduced-complexity combining scheme that exploits second-order statistics of the channel. Compared to maximum ratio combining, substantial improvements are achieved, especially when the number of active terminals increases. This is attained with limited computational cost and remarkable robustness to the imperfect channel statistics knowledge.

Reduced-complexity and robust uplink signal processing for large-scale MIMO

G. Bacci;A. A. D’Amico;L. Sanguinetti
2024-01-01

Abstract

The large number of individually controlled antennas in large-scale MIMO systems makes the complexity of uplink receive combining a serious challenge. This is why simple methods, such as maximum ratio combining, are often considered, even if lower spectral efficiency is attained. In this paper, we investigate the performance of a reduced-complexity combining scheme that exploits second-order statistics of the channel. Compared to maximum ratio combining, substantial improvements are achieved, especially when the number of active terminals increases. This is attained with limited computational cost and remarkable robustness to the imperfect channel statistics knowledge.
2024
979-8-3503-6251-0
File in questo prodotto:
File Dimensione Formato  
Reduced-Complexity_and_Robust_Uplink_Signal_Processing_for_Large-Scale_MIMO (1).pdf

non disponibili

Tipologia: Versione finale editoriale
Licenza: NON PUBBLICO - accesso privato/ristretto
Dimensione 1.11 MB
Formato Adobe PDF
1.11 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

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/11568/1270408
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? ND
social impact