Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nuts and Bolts of a Realistic Stochastic Geometric Analysis of mmWave
  HetNets: Hardware Impairments and Channel Aging   Motivated by heterogeneous networks (HetNets) design in improving coverage
and by millimeter-wave (mmWave) transmission offering an abundance of extra
spectrum, we present a general analytical framework shedding light to the
downlink of realistic mmWave HetNets consisting of $K$ tiers of randomly
located base stations (BSs). Specifically, we model, by virtue of stochastic
geometry tools, the \textit{multi-tier} \textit{multi-user multiple-input
multiple-output (MU-MIMO) mmWave} network degraded by the inevitable
\textit{residual additive transceiver hardware impairments (RATHIs)} and
\textit{channel aging}. Given this setting, we derive the coverage probability
and the area spectral efficiency (ASE), and we subsequently evaluate the impact
of residual transceiver hardware impairments (RTHIs) and channel aging on these
metrics. Different path-loss laws for line-of-sight (LOS) and non-line-of-sight
(NLOS) are accounted for the analysis, which are among the distinguishing
features of mmWave systems. Among the findings, we show that the RATHIs have a
meaningful impact at the high signal-to-noise ratio (SNR) regime, while the
transmit additive distortion degrades further than the receive distortion the
system performance. Moreover, serving fewer users proves to be preferable, and
the more directive the mmWaves are, the higher the ASE becomes.

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The categories of this paper are: supr-con
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The categories of this paper are: atom-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: alg-geom
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The categories of this paper are: q-bio
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The categories of this paper are: solv-int
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The categories of this paper are: q-alg
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The categories of this paper are: hep-th
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The categories of this paper are: q-fin
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The categories of this paper are: hep-lat
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The categories of this paper are: chem-ph
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The categories of this paper are: math-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: patt-sol
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The categories of this paper are: cond-mat
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The categories of this paper are: nucl-th