Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On Gaussian Multiple Access Channels with Interference: Achievable Rates
  and Upper Bounds   We study the interaction between two interfering Gaussian 2-user multiple
access channels. The capacity region is characterized under mixed
strong--extremely strong interference and individually very strong
interference. Furthermore, the sum capacity is derived under a less restricting
definition of very strong interference. Finally, a general upper bound on the
sum capacity is provided, which is nearly tight for weak cross links.

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The categories of this paper are: atom-ph
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The categories of this paper are: funct-an
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The categories of this paper are: alg-geom
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The categories of this paper are: chem-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: cond-mat
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The categories of this paper are: cmp-lg
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The categories of this paper are: econ
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The categories of this paper are: eess
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The categories of this paper are: nlin
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The categories of this paper are: physics
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The categories of this paper are: supr-con
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: stat