Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: HS-OFDM-based Time-Domain Reflectometry for Power Line Sensing:
  Characteristics and Limitations   This study discusses key characteristics and limitations of time-domain
reflectometry (TDR) systems based on the Hermitian symmetric orthogonal
frequency-division multiplexing (HS-OFDM) scheme for power line sensing. In
this sense, a system model with a power line modem injecting signals and
capturing raising reflections for sensing a power distribution network is
outlined. Next, pulse compression and channel estimation reflectogram
processing approaches are carefully described and the effects of system
parametrization and multiple access schemes on the HS-OFDM-based TDR system
performance are addressed. Finally, numerical results covering a comparison
between pulse compression and channel estimation, system limitations based on
parametrization considering typical European underground low-voltage and US
overhead medium-voltage (MV) scenarios and narrowband (NB) power line
communication (PLC) regulatory constraints, and comparison among multiple
access techniques in a Brazilian MV overhead scenario are presented for
supporting the carried out discussion. Based on the attained results, it is
shown that channel estimation outperforms the pulse compression in terms of
computational complexity and sidelobe level. Also, it is shown that the NB-PLC
frequency range provides fair range resolution and maximum unambiguous range
values. Finally, it is seen that the use of the frequency-division multiple
access multiple access schemes presents different
signal-to-interference-plus-noise ratio (SINR) performance among different
power line modems (PLMs) connected to a power distribution grid, while the use
of time-division multiple access and code-division multiple access schemes
results in fair SINR performance among the PLMs at the cost of obtaining less
reflectograms over time due to time multiplexing and spreading processes,
respectively.

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The categories of this paper are: physics
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The categories of this paper are: hep-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: adap-org
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The categories of this paper are: q-fin
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The categories of this paper are: astro-ph
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The categories of this paper are: math-ph
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The categories of this paper are: q-bio
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The categories of this paper are: nucl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: econ
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The categories of this paper are: patt-sol
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The categories of this paper are: atom-ph
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The categories of this paper are: nucl-ex