Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Sum Capacity of Many-to-one and One-to-many Gaussian Interference
  Channels   We obtain new sum capacity results for the Gaussian many-to-one and
one-to-many interference channels in channel parameter regimes where the sum
capacity was known only up to a constant gap. Simple Han-Kobayashi (HK)
schemes, i.e., HK schemes with Gaussian signaling, no time-sharing, and no
common-private power splitting, achieve sum capacity under the channel
conditions for which the new results are obtained. To obtain sum capacity
results, we show that genie-aided upper bounds match the achievable sum rate of
simple HK schemes under certain channel conditions.

18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
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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: dg-ga
31
The categories of this paper are: ao-sci
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The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
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The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom