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 reconfigurable intelligent surface (RIS) is widely recognized as an effective solution for
enhancing security in wireless communications, owing to its passive reflective components …

In this paper, we consider a non-orthogonal multiple access (NOMA) based mixed free
space optical–radio frequency (FSO-RF) system with imperfect channel state information …

Energy harvesting (EH) extends device lifespan and reduces carbon emissions in wireless
communication. Non-linear EH overcomes not only sensitivity and saturation issues …

Abstract Free Space Optical (FSO) communication systems are used for high speed, secure
and cheaper optical connectivity between users. It can transport the data from a suitable …

The optical wireless/radio frequency hybrid communication system makes up for the
limitations of a single communication system, makes up for the shortcomings of radio …

Optical wireless communications (OWC) systems provide higher data rates in the unlicensed
spectrum bands compared to traditional radio frequency (RF) wireless communications …

We consider the outage performance of a mixed free-space optical-radio frequency (FSO-
RF) communication system, which consists of a source (S), a relay (R), a destination (D), and …

This paper investigates the performance analysis of radio frequency/free space optical-
visible light communication (RF/FSO-VLC) system, where a hybrid RF/FSO link is connected …

Recently, atmospheric-turbulence-induced fading in free-space optical (FSO)
communication with pointing error impairment was modeled and studied using the Fisher …