Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Interference Avoidance Position Planning in UAV-assisted Wireless
  Communication   We consider unmanned aerial vehicle (UAV)-assisted wireless communication
employing UAVs as relay nodes to increase the throughput between a pair of
transmitter and receiver. We focus on developing effective methods to position
the UAV(s) in the sky in the presence of a major source of interference, the
existence of which makes the problem non-trivial. First, we consider utilizing
a single UAV, for which we develop a theoretical framework to determine its
optimal position aiming to maximize the SIR of the system. To this end, we
investigate the problem for three practical scenarios, in which the position of
the UAV is: (i) vertically fixed, horizontally adjustable; (ii) horizontally
fixed, vertically adjustable; (iii) both horizontally and vertically
adjustable. Afterward, we consider employing multiple UAVs, for which we
propose a cost-effective method that simultaneously minimizes the number of
required UAVs and determines their optimal positions so as to guarantee a
certain SIR of the system. We further develop a distributed placement
algorithm, which can increase the SIR of the system given an arbitrary number
of UAVs. Numerical simulations are provided to evaluate the performance of our
proposed methods.

10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph