Reconfigurable intelligent surface (RIS) is a cost-effective solution to support millimeter
wave (mmWave) communications suffering from severe blockage. In this letter, we aim to …

In this paper, we study the problem of relay precoder design in a multi-antenna non-
regenerative relay cognitive radio (CR) system assuming underlay spectrum sharing …

This paper considers the deployment of an intelligent reflecting surface (IRS) to assist a
multiuser multiple-input multiple-output (MU-MIMO) simultaneous wireless information and …

Millimeter wave (mmWave) massive multiple-input multiple-output (MIMO) communication
systems with hybrid analog and digital beamforming architectures have emerged as a key …

Large-scale antenna technology is a key technology for the fifth-generation mobile
communication (5G) system to improve capacity and spectrum utilization; meanwhile …

In a cost-effective implementation, we address the problem of cross-interference in cognitive
multiple-input multiple-output (MIMO) spectrum sharing where mutual cochannel …

Intelligent reflecting surface (IRS) has been proved to be an efficient technology to improve
the spectrum and energy efficiency in cognitive radio (CR) networks. Unfortunately, due to …

We study the optimal precoder design for a MIMO cognitive two-way relay system with
underlay spectrum sharing. The system consists of two secondary users (SUs) and one relay …

In this paper, the throughput performance of a hybrid Multiple-Input-Multiple-Output (MIMO)
interweave/underlay Cognitive Radio (CR) system is examined on an analytical basis …

Owing to the ability of improving spectrum utilisation and quality‐of‐service (QoS) in
wireless communications, multiple‐input–multiple‐output (MIMO) cognitive radio (CR) …