Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Distributed Power Control in Downlink Cellular Massive MIMO Systems   This paper compares centralized and distributed methods to solve the power
minimization problem with quality-of-service (QoS) constraints in the downlink
(DL) of multi-cell Massive multiple-input multiple-output (MIMO) systems. In
particular, we study the computational complexity, number of parameters that
need to be exchanged between base stations (BSs), and the convergence of
iterative implementations. Although a distributed implementation based on dual
decomposition (which only requires statistical channel knowledge at each BS)
typically converges to the global optimum after a few iterations, many
parameters need to be exchanged to reach convergence.

26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
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The categories of this paper are: solv-int
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The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat