As the world braces for an era of ubiquitous and seamless connectivity, hybrid beamforming
stands out as a beacon guiding the evolutionary path of wireless communication …

The fifth generation (5G) of the mobile networks is envisioned to feature two major service
classes: ultra-reliable low-latency communications (URLLC) and enhanced mobile …

The recent research in the emerging technology of reconfigurable intelligent surfaces (RISs)
has identified its high potential for localization and sensing. However, to accurately localize …

This article analyzes the channel estimation performance of massive multiple-input-multiple-
output (MIMO) Internet-of-Things (IoT) systems with Ricean fading. First, by utilizing the least …

In this work, we investigate hybrid analog–digital beamforming (HBF) architectures for uplink
cell-free (CF) millimeter-wave (mmWave) massive multiple-input multiple-output (MIMO) …

Reconfigurable intelligent surfaces (RISs), as a promising technology for 6 G
communications, have received considerable attention. Herein, we investigate the downlink …

Cell-free massive MIMO systems consist of many distributed access points with simple
components that jointly serve the users. In millimeter wave bands, only a limited set of …

The cell-free MIMO concept relying on hybrid precoding constitutes an innovative technique
capable of dramatically increasing the network capacity of millimeter-wave (mmWave) …

The increasing demands for spectral resources in emerging massive machine-type
communication applications necessitate the implementation of massive grant-free …