Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: RIS-Assisted Multihop FSO/RF Hybrid System for Vehicular Communications
  over Generalized Fading   Reconfigurable intelligent surface (RIS) is a promising technology to avoid
signal blockage by creating line-of-sight (LOS) connectivity for free-space
optical (FSO) and radio frequency (RF) wireless systems. There is limited
research on the use of multiple RIS between a source and destination for
wireless communications. This paper analyzes the performance of a RIS-assisted
multi-hop transmission for vehicular communications by employing multiple RIS
to enable LOS communication and reliable connectivity for a hybrid FSO and RF
system. We develop an analytical framework to derive statistical results of the
signal-to-noise ratio (SNR) of a multi-RIS communication system over general
fading models. We use decode-and-forward (DF) and fixed-gain (FG) relaying
protocols to mix multi-RIS transmissions over RF and FSO technologies, and
derive probability density and distribution functions for both the relaying
schemes by considering independent and non-identical double generalized gamma
(dGG) distribution models for vehicular RF transmissions and atmospheric
turbulence for FSO system combined with zero-boresight pointing errors. We
analyze the performance of a moving vehicle connected to one of the RIS modules
by deriving exact analytical expressions of the outage probability, average
bit-error rate (BER), and ergodic capacity in terms of Fox's H-function. We
present asymptotic analysis and diversity order of the outage probability in
the high SNR regime to provide a better insight into the system performance. We
use computer simulations to demonstrate the effect of multiple RIS modules,
fading parameters, and pointing errors on the RIS-aided multi-hop transmissions
for the considered vehicular communication system.

23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th