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 …

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 …

This article proposes a beamforming (BF) scheme for a cognitive satellite terrestrial network,
where the base station (BS) and a cooperative terminal (CT) are exploited as green …

In this paper, an energy harvesting scheme for a multi-user multiple-input-multiple-output
secrecy channel with artificial noise (AN) transmission is investigated. Joint optimization of …

In this letter, we investigate the secure transmission in a cognitive satellite-terrestrial network
with a multi-antennas eavesdropper, where the interference from terrestrial base station is …

In this paper, we propose a novel layered physical layer security model, which is the
extension of the traditional physical layer security to the domain of multiple-layer information …

This paper investigates a joint transmissive and reflective reconfigurable intelligent surfaces
(RIS)-aided secure multiple-input multiple-output (MIMO) system, where both a RIS-assisted …

Smart farm management has complex challenges; therefore, there is a need to improve the
overall adaptability, profitability, and environmental soundness of the farming systems …

Robust quality-of-service (QoS)-based and secrecy rate-based secure transmission designs
are investigated for a multiple-input single-output system with multiple eavesdroppers and a …

In this paper, we consider multiple-input single-output multi-eavesdropper cognitive radio
networks (MISOME-CRNs), where a secondary user (SU) aims to transmit confidential …