72 research outputs found
A Free Space Optic/Optical Wireless Communication: A Survey
The exponential demand for the next generation of services over free space optic and wireless optic communication is a necessity to approve new guidelines in this range. In this review article, we bring together an earlier study associated with these schemes to help us implement a multiple input/multiple output flexible platform for the next generation in an efficient manner. OWC/FSO is a complement clarification to radiofrequency technologies. Notably, they are providing various gains such as unrestricted authorizing, varied volume, essential safekeeping, and immunity to interference.
Enhancing Physical Layer Secrecy Performance for RIS-assisted RF-FSO Mixed Wireless System
Peer reviewedPublisher PD
RIS-aided Mixed RF-FSO Wireless Networks: Secrecy Performance Analysis with Simultaneous Eavesdropping
The appearance of sixth-generation networks has resulted in the proposal of
several solutions to tackle signal loss. One of these solutions is the
utilization of reconfigurable intelligent surfaces (RIS), which can reflect or
refract signals as required. This integration offers significant potential to
improve the coverage area from the sender to the receiver. In this paper, we
present a comprehensive framework for analyzing the secrecy performance of a
RIS-aided mixed radio frequency (RF)-free space optics (FSO) system, for the
first time. Our study assumes that a secure message is transmitted from a RF
transmitter to a FSO receiver through an intermediate relay. The RF link
experiences Rician fading while the FSO link experiences M\'alaga distributed
turbulence with pointing errors. We examine three scenarios: 1) RF-link
eavesdropping, 2) FSO-link eavesdropping, and 3) a simultaneous eavesdropping
attack on both RF and FSO links. We evaluate the secrecy performance using
analytical expressions to compute secrecy metrics such as the average secrecy
capacity, secrecy outage probability, strictly positive secrecy capacity,
effective secrecy throughput, and intercept probability. Our results are
confirmed via Monte-Carlo simulations and demonstrate that fading parameters,
atmospheric turbulence conditions, pointing errors, and detection techniques
play a crucial role in enhancing secrecy performance.Comment: No comment
A Prospective Look: Key Enabling Technologies, Applications and Open Research Topics in 6G Networks
The fifth generation (5G) mobile networks are envisaged to enable a plethora
of breakthrough advancements in wireless technologies, providing support of a
diverse set of services over a single platform. While the deployment of 5G
systems is scaling up globally, it is time to look ahead for beyond 5G systems.
This is driven by the emerging societal trends, calling for fully automated
systems and intelligent services supported by extended reality and haptics
communications. To accommodate the stringent requirements of their prospective
applications, which are data-driven and defined by extremely low-latency,
ultra-reliable, fast and seamless wireless connectivity, research initiatives
are currently focusing on a progressive roadmap towards the sixth generation
(6G) networks. In this article, we shed light on some of the major enabling
technologies for 6G, which are expected to revolutionize the fundamental
architectures of cellular networks and provide multiple homogeneous artificial
intelligence-empowered services, including distributed communications, control,
computing, sensing, and energy, from its core to its end nodes. Particularly,
this paper aims to answer several 6G framework related questions: What are the
driving forces for the development of 6G? How will the enabling technologies of
6G differ from those in 5G? What kind of applications and interactions will
they support which would not be supported by 5G? We address these questions by
presenting a profound study of the 6G vision and outlining five of its
disruptive technologies, i.e., terahertz communications, programmable
metasurfaces, drone-based communications, backscatter communications and
tactile internet, as well as their potential applications. Then, by leveraging
the state-of-the-art literature surveyed for each technology, we discuss their
requirements, key challenges, and open research problems
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