Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Random Access Protocols with Collision Resolution in a Noncoherent
  Setting   Wireless systems are increasingly used for Machine-Type Communication (MTC),
where the users sporadically send very short messages. In such a setting, the
overhead imposed by channel estimation is substantial, thereby demanding
noncoherent communication. In this paper we consider a noncoherent setup in
which users randomly access the medium to send short messages to a common
receiver. We propose a transmission scheme based on Gabor frames, where each
user has a dedicated codebook of M possible codewords, while the codebook
simultaneously serves as an ID for the user. The scheme is used as a basis for
a simple protocol for collision resolution.

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The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
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The categories of this paper are: hep-lat
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The categories of this paper are: dg-ga
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The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
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The categories of this paper are: nucl-th
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The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: math-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: adap-org
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The categories of this paper are: hep-ex
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The categories of this paper are: chao-dyn