Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Degrees-of-Freedom of the MIMO Three-Way Channel with
  Intermittent Connectivity   The degrees-of-freedom (DoF) of the multi-antenna three-way channel (3WC)
with an intermittent node is studied. Special attention is given to the impact
of adaptation. A nonadaptive transmission scheme based on interference
alignment, zero-forcing, and erasure-channel treatment is proposed, and its
corresponding DoF region is derived. Then, it is shown that this scheme
achieves the sum-DoF of the intermittent channel, in addition to the DoF region
of the nonintermittent one. Thus, adaptation is not necessary from those
perspectives. To the contrary, it is shown that adaptation is necessary for
achieving the DoF region of the intermittent case. This is shown by deriving an
outer bound for the intermittent channel with nonadaptive encoding, and giving
a counterexample of an adaptive scheme which achieves DoF tuples outside this
bound. This highlights the importance of cooperation in this intermittent
network.

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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: q-fin
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The categories of this paper are: adap-org
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The categories of this paper are: nucl-ex
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The categories of this paper are: atom-ph
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The categories of this paper are: physics
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The categories of this paper are: bayes-an
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The categories of this paper are: math-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: funct-an
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The categories of this paper are: acc-phys
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The categories of this paper are: nlin
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The categories of this paper are: patt-sol
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The categories of this paper are: plasm-ph