Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Joint Deployment and Multiple Access Design for Intelligent Reflecting
  Surface Assisted Networks   The fundamental intelligent reflecting surface (IRS) deployment problem is
investigated for IRS-assisted networks, where one IRS is arranged to be
deployed in a specific region for assisting the communication between an access
point (AP) and multiple users. Specifically, three multiple access schemes are
considered, namely non-orthogonal multiple access (NOMA), frequency division
multiple access (FDMA), and time division multiple access (TDMA). The weighted
sum rate maximization problem for joint optimization of the deployment location
and the reflection coefficients of the IRS as well as the power allocation at
the AP is formulated. The non-convex optimization problems obtained for NOMA
and FDMA are solved by employing monotonic optimization and semidefinite
relaxation to find a performance upper bound. The problem obtained for TDMA is
optimally solved by leveraging the time-selective nature of the IRS.
Furthermore, for all three multiple access schemes, low-complexity suboptimal
algorithms are developed by exploiting alternating optimization and successive
convex approximation techniques, where a local region optimization method is
applied for optimizing the IRS deployment location. Numerical results are
provided to show that: 1) near-optimal performance can be achieved by the
proposed suboptimal algorithms; 2) asymmetric and symmetric IRS deployment
strategies are preferable for NOMA and FDMA/TDMA, respectively; 3) the
performance gain achieved with IRS can be significantly improved by optimizing
the deployment location.

13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an