Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Elevation Beamforming with Full Dimension MIMO Architectures in 5G
  Systems: A Tutorial   Full dimension (FD) multiple-input multiple-output (MIMO) technology has
attracted substantial research attention from both wireless industry and
academia in the last few years as a promising technique for next-generation
wireless communication networks. FD-MIMO scenarios utilize a planar
two-dimensional active antenna system (AAS) that not only allows a large number
of antenna elements to be placed within feasible base station (BS) form
factors, but also provides the ability of adaptive electronic beam control over
both the elevation and the traditional azimuth dimensions. This paper presents
a tutorial on elevation beamforming analysis for cellular networks utilizing FD
Massive MIMO antenna arrays. In contrast to existing works that focus on the
standardization of FD-MIMO in the 3rd Generation Partnership Project (3GPP),
this tutorial is distinguished by its depth with respect to the theoretical
aspects of antenna array and 3D channel modeling. In an attempt to bridge the
gap between industry and academia, this preliminary tutorial introduces the
relevant array and transceiver architecture designs proposed in the 3GPP
Release 13 that enable elevation beamforming. Then it presents and compares two
different 3D channel modeling approaches that can be utilized for the
performance analysis of elevation beamforming techniques. The spatial
correlation in FD-MIMO arrays is characterized and compared based on both
channel modeling approaches and some insights into the impact of different
channel and array parameters on the correlation are drawn. All these aspects
are put together to provide a mathematical framework for the design of
elevation beamforming schemes in single-cell and multi-cell scenarios.
Simulation examples associated with comparisons and discussions are also
presented. To this end, this paper highlights the state-of-the-art research and
points out future research directions.

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The categories of this paper are: mtrl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: solv-int
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The categories of this paper are: eess
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The categories of this paper are: plasm-ph
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The categories of this paper are: adap-org
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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: stat
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The categories of this paper are: dg-ga
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The categories of this paper are: supr-con
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The categories of this paper are: comp-gas
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The categories of this paper are: q-fin
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The categories of this paper are: q-alg
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The categories of this paper are: astro-ph
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The categories of this paper are: physics