Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optimal Hybrid Beamforming for Multiuser Massive MIMO Systems With
  Individual SINR Constraints   In this letter, we consider optimal hybrid beamforming design to minimize the
transmission power under individual signal-to-interference-plus-noise ratio
(SINR) constraints in a multiuser massive multiple-input-multiple-output (MIMO)
system. This results in a challenging non-convex optimization problem. We
consider two cases. In the case where the number of users is smaller than or
equal to that of radio frequency (RF) chains, we propose a low-complexity
method to obtain a globally optimal solution and show that it achieves the same
transmission power as an optimal fully-digital beamformer. In the case where
the number of users is larger than that of RF chains, we propose a
low-complexity globally convergent alternating algorithm to obtain a stationary
point.

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The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
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The categories of this paper are: econ
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
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
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an