Unmanned aerial vehicles (UAVs) can provide wireless access services to terrestrial users
without geographical limitations and will become an essential part of the future …

Cognitive unmanned aerial vehicle (UAV) communication systems combine benefits of both
the cognitive radio and UAV, which improves the spectral efficiency and communication …

This paper considers secure communications for an underlay cognitive radio network (CRN)
in the presence of an external eavesdropper (Eve). The secrecy performance of CRNs is …

This paper investigates the physical layer security issue in an unmanned aerial vehicle
(UAV) aided cognitive radio network. Specially, a UAV operates as an aerial secondary …

Unmanned aerial vehicles (UAVs) have been widely employed to enhance the end-to-end
performance of wireless communications since the links between UAVs and terrestrial …

Unmanned aerial vehicles (UAVs) are envisioned as a promising means of providing
wireless services for various complex terrains and emergency situations. In this paper, we …

Cognitive radio is a promising technology to improve spectral efficiency. However,
communication security of a secondary network is limited by its transmit power and channel …

Cognitive radio is a promising technology to improve spectral efficiency. However, the
secure performance of a secondary network achieved by using physical layer security …

This chapter proposes a new method that uses a cooperative unmanned aerial vehicle
(UAV) as a friendly jammer to enhance the security performance of cognitive radio networks …

The secure performance of wideband cognitive radio networks (CRNs) with OFDMA
(orthogonal frequency-division multiple access) achieved by using physical layer security is …