Cognitive radio (CR) has been considered as a potential candidate for addressing the
spectrum scarcity problem of future wireless networks. Since its conception, several …

Traditional spectrum allocation policies may result in temporarily unused radio spectrum.
Cognitive radio (CR) has emerged as a promising technology to exploit the radio spectrum …

Nonorthogonal multiple access (NOMA) represents a paradigm shift from conventional
orthogonal multiple-access (MA) concepts and has been recognized as one of the key …

The aim of this paper is to study how to enlarge the performance gap between non-
orthogonal multiple access (NOMA) and conventional orthogonal multiple access (MA) by …

Cooperative and Cognitive Satellite Systems provides a solid overview of the current
research in the field of cooperative and cognitive satellite systems, helping users understand …

This paper studies a cognitive radio network (CRN), in which a multiple-input single-output
(MISO) secondary transmitter (SU-Tx) aims to send confidential messages to its receiver (SU …

Directional antenna technologies have made significant advancements in the last decade.
These advances have opened the door to many exciting new design opportunities for …

One of common threats imposed to the cognitive radio (CR) network is primary user
emulation attack (PUEA), where some malicious users try to mimic the primary signal and …

We investigate energy-efficient communications for time-division multiple access (TDMA)
multiple-input multiple-output (MIMO) cognitive radio (CR) networks operating in underlay …

Coexistence between radar systems and low-power broadband devices has recently
become a focus of research by regulators, industry and academic bodies, with the possibility …