Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Self-Secure Capacity-Achieving Feedback Schemes of Gaussian
  Multiple-Access Wiretap Channels with Degraded Message Sets   The Schalkwijk-Kailath (SK) scheme, which achieves the capacity of the
point-to-point white Gaussian channel with feedback, is secure by itself and
also achieves the secrecy capacity of the Gaussian wiretap channel with
feedback, i.e., the SK scheme is a self-secure capacity-achieving (SSCA)
feedback scheme for the Gaussian wiretap channel. For the multi-user wiretap
channels, recently, it has been shown that Ozarow's capacity-achieving feedback
scheme for the two-user Gaussian multiple-access channel (GMAC) is the SSCA
feedback scheme for the two-user Gaussian multiple-access wiretap channel
(GMAC-WT). In this paper, first, we propose a capacity-achieving feedback
scheme for the two-user GMAC with degraded message sets (GMAC-DMS), and show
that this scheme is the SSCA feedback scheme for the two-user GMAC-WT with
degraded message sets (GMAC-WT-DMS). Next, we extend the above scheme to the
two-user GMAC-DMS with noncausal channel state information at the transmitters
(NCSIT), and show that the extended scheme is capacity-achieving and also a
SSCA feedback scheme for the two-user GMAC-WT-DMS with NCSIT. Finally, we
derive outer bounds on the secrecy capacity regions of the two-user GMAC-WT-DMS
with or without NCSIT, and numerical results show the rate gains by the
feedback.

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The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
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The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-ex
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The categories of this paper are: solv-int
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The categories of this paper are: q-bio
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The categories of this paper are: cmp-lg
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The categories of this paper are: acc-phys
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The categories of this paper are: comp-gas
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The categories of this paper are: atom-ph