Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: HAPS-assisted Hybrid RF-FSO Multicast Communications: Error and Outage
  Analysis   In this work, we study the performance of multiple-hop mixed frequency
(RF)/free-space optical (FSO) communication-based decode-and-forward protocol
for multicast networks. So far, serving a large number of users is considered a
promising approach for real-time applications to address the massive data
traffic demands.
  In this regard, we propose two practical use-cases. In the former model, we
propose a high altitude platform station (HAPS)-aided mixed RF/FSO/RF
communication scheme where a terrestrial ground station intends to communicate
with a cluster of nodes through two stratospheric HAPS systems. In the latter
model, we assume that the line of sight connectivity is inaccessible between
the two HAPS systems due to high attenuation caused by large propagation
distances. Thereby, we propose a low Earth orbit satellite-aided mixed
RF/FSO/FSO/RF communication. For the proposed scenarios, closed-form
expressions of outage probability (OP) and bit error rate are derived. In
addition, to illustrate the asymptotic behavior of the proposed models,
diversity gains are obtained. Furthermore, ergodic capacity and energy
efficiency (EE) are provided for both scenarios. Finally, the simulation
results are provided to validate the theoretical derivations. The results show
that satellite-aided mixed RF/FSO/FSO/RF scenarios achieve better OP, whereas
HAPS-aided mixed RF/FSO/RF scenario can achieve higher EE.

33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg