We propose a hybrid beamforming architecture for near-field reconfigurable holographic
surfaces (RHS) harnessed in cell-free networks. Specifically, the holographic beamformer of …

Large-scale multiple-input and multiple-output (MIMO) systems are capable of achieving
high date rate. However, given the high hardware cost and excessive power consumption of …

In this paper, we investigate the sparse channel estimation in holographic multiple-input
multiple-output (HMIMO) systems. The conventional angular-domain representation fails to …

In this paper, we consider a hybrid Analog and Digital (A/D) receiver architecture with an
extremely large Dynamic Metasurface Antenna (DMA) and an 1-bit resolution Analog-to …

Extremely large-scale multiple-input multiple-output (XL-MIMO) is crucial for satisfying the
high data rate requirements of the sixth-generation (6G) wireless networks. In this context …

This study delves into the potential of harnessing the orbital angular momentum (OAM)
property of electromagnetic waves in near-field and line-of-sight scenarios by utilizing large …

The 4G/5G era in the past decades has witnessed the vigorous development of Hybrid
Analog and Digital Beamforming (HBF) technologies in the field of communications under …

The performance of holographic multiple-input multiple-output (MIMO) communications,
employing two-dimensional (2-D) planar antenna arrays, is typically compromised by finite …

Holographic multiple-input multiple-output (HMIMO) communication systems utilize spatially-
constrained massive MIMO arrays containing large numbers of antennas with sub …

In this paper, first, the structure of a linear sparse periodic array for two-dimensional
scanning is described. Then, based on its characteristics, an algorithm is presented for fast …