As a complement to high-layer encryption techniques, physical layer security has been
widely recognized as a promising way to enhance wireless security by exploiting the …

For conventional wireless networks, the main target of resource allocation (RA) is to
efficiently utilize the available resources. Generally, there are no changes in the available …

In this paper, we introduce an intelligent reflecting surface (IRS) to provide a programmable
wireless environment for physical layer security. By adjusting the reflecting coefficients, the …

Cognitive radio (CR) is an effective solution to improve the spectral efficiency (SE) of
wireless communications by allowing the secondary users (SUs) to share spectrum with …

Cognitive radio (CR) and non-orthogonal multiple access (NOMA) have been deemed two
promising technologies due to their potential to achieve high spectral efficiency and massive …

Since the discovery of wireless telegraphy in 1897, wireless communication via
electromagnetic (EM) signals has become a standard solution to address increasing …

A multiple-input single-output cognitive radio downlink network is studied with simultaneous
wireless information and power transfer. In this network, a secondary user coexists with …

We consider a cognitive radio (CR) network consisting of a secondary transmitter (ST), a
secondary destination (SD) and multiple secondary relays (SRs) in the presence of an …

Consider an MISO channel overheard by multiple eavesdroppers. Our goal is to design an
artificial noise (AN)-aided transmit strategy, such that the achievable secrecy rate is …

Cognitive radio (CR) is regarded as an emerging technology, which equips wireless devices
with the capability to adapt their operating parameters on the fly based on the radio …