Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reconfigurable Intelligent Surface for MISO Systems with Proportional
  Rate Constraints   This paper investigates the system spectral efficiency (SE) in reconfigurable
intelligent surface (RIS)-aided multiuser multiple-input single-output (MISO)
systems, where RIS can reconfigure the propagation environment via a large
number of controllable and intelligent phase shifters. In order to explore the
system SE performance behavior with user proportional fairness for such a
system, an optimization problem is formulated to maximize the SE by jointly
considering the power allocation at the base station (BS) and phase shift at
the RIS, under nonlinear proportional rate fairness constraints. To solve the
nonconvex optimization problem, an effective solution is developed, which
capitalizes on an iterative algorithm with closed-form expressions, i.e.,
alternatively optimizing the transmit power at the BS and the reflecting phase
shift at the RIS. Numerical simulations are provided to validate the
theoretical analysis and assess the performance of the proposed alternative
algorithm.

12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
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The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas