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

In this paper, we introduce a new spatial spectrum-sharing strategy for massive multiple-
input multiple-output (MIMO) cognitive radio (CR) systems. Different from the conventional …

Cognitive radio (CR) is the most reliable technology for efficient spectrum usage. In cognitive
radio network (CRN), primary users share frequency band with secondary user. Secondary …

This paper presents a new spatial spectrum-sharing strategy for massive multiple-input
multiple-output (MIMO) cognitive radio (CR) systems, where two CR base stations (CBS) are …

In order to combat the challenges of scarce spectrum bandwidth and energy supply in the
Internet-of-Things networks, this article investigates a wireless-powered massive multiple …

Cognitive radio (CR) and massive multiple-input multiple-output (MIMO) have attracted
much interest recently due to the amazing ability to accommodate more users and improve …

In this paper, we analyze the feasibility of serving K secondary users (SUs) on the downlink
using a secondary base station (SBS), equipped with a large antenna array, in an underlay …

In this paper, we propose an underlay cognitive radio spectrum access (UCRSA) technique
to share the licensed 28 GHz millimeter-wave (mmWave) spectrum of one mobile network …

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

We investigate the use of massive number of antennas at the cognitive base station (BS) in
reducing interference caused to primary users (PUs) under imperfect channel knowledge …