Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Utility-Based Precoding Optimization Framework for Large Intelligent
  Surfaces   The spectral efficiency of wireless networks can be made nearly infinitely
large by deploying many antennas, but the deployment of very many antennas
requires new topologies beyond the compact and discrete antenna arrays used by
conventional base stations. In this paper, we consider the large intelligent
surface scenario where small antennas are deployed on a large and dense
two-dimensional grid. Building on the heritage of MIMO, we first analyze the
beamwidth and sidelobes when transmitting from large intelligent surfaces. We
compare different precoding schemes and determine how to optimize the transmit
power with respect to different utility functions.

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The categories of this paper are: dg-ga
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The categories of this paper are: gr-qc
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
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The categories of this paper are: hep-lat
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The categories of this paper are: cmp-lg
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The categories of this paper are: ao-sci
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The categories of this paper are: math-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: funct-an
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The categories of this paper are: q-fin
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The categories of this paper are: nlin
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The categories of this paper are: astro-ph
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The categories of this paper are: adap-org
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The categories of this paper are: solv-int
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The categories of this paper are: econ