In this paper, a novel reconfigurable intelligent surface (RIS)-assisted HAP-UAV secure multi-
user mixed radio frequency (RF)/free space optical (FSO) system is proposed. Specifically …

The use of dual-mode base stations that can jointly exploit millimeter wave (mmW) and
microwave (μW) resources is a promising solution for overcoming the uncertainty of the …

We present a comprehensive review for wireless power transfer (WPT)-aided full-duplex
(FD) relay systems. Two critical challenges in implementing WPT-aided FD relay systems …

Communication assisted by unmanned aerial vehicles (UAVs) has been regarded as an
effective technique for reliability improvement in both military and civilian domains, whereas …

In wireless power transfer (WPT)-assisted relaying systems, spectral efficiency (SE) of
source-relay link plays a dominant role in system SE performance due to the limited …

We study the maximum achievable rate of a two-hop amplified-and-forward (AF) relaying
millimeter-wave (mm-wave) system, where two AF relaying schemes, ie, half-duplex (HD) …

The full-duplex (FD) cooperative nonorthogonal multiple access (NOMA) achieves a
superior throughput over the conventional half-duplex (HD) cooperative NOMA, wherein the …

Green energy-saving communication is one of the important research topics for the
development of 5G technology. Under the premise of widespread distribution of intensive …

In this article, we consider the millimeter-wave simultaneous wireless information and power
transfer nonorthogonal multiple access (NOMA) relay networks in the presence of multiple …

The abundance of spectrum in the millimeter-wave (mm-wave) bands makes it an attractive
alternative for future wireless communication systems. Such systems are expected to …