Physical layer security (PLS) has emerged as a new concept and powerful alternative that
can complement and may even replace encryption-based approaches, which entail many …

We investigate the optimal physical-layer secure transmission with artificial noise in the
wiretap channel with N antennas at the transmitter, a single antenna at the receiver, and M …

In this paper, we investigate the covert communications in an overlay cognitive radio (CR)
network, where multiple secondary transmitters (STs) opportunistically send confidential …

We investigate beamforming and artificial noise generation at the secondary transmitters to
establish secure transmission in large scale spectrum sharing networks, where multiple …

We consider a cognitive radio network where multiple secondary users (SUs) coexist with a
primary user (PU). There exist multiple eavesdroppers (EAVs) who attempt to overhear the …

In this paper, we propose a cooperative approach to improve the security of both primary
and secondary systems in cognitive radio multicast communications. During their access to …

In this paper, a novel wireless energy harvesting cooperative jammer (EH-CJ)-aided
transmission scheme, which can enhance the security for cooperative cognitive radio …

This paper studies the security and communication efficiency problem of a reconfigurable
intelligent surface (RIS) assisted cognitive radio network, in which we proposed a scheme …

In this paper, we propose an underlay two‐way relaying scheme with the successive
interference cancellation (SIC) solution in which two secondary sources transmit …

An underlay cognitive radio network (CRN) with non-orthogonal multiple access (NOMA) is
a promising multiple access scheme to solve the problem of scarce spectrum. This novel …