Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Time-Switching Uplink Network-Coded Cooperative Communication with
  Downlink Energy Transfer   In this work, we consider a multiuser cooperative wireless network where the
energy-constrained sources have independent information to transmit to a common
destination, which is assumed to be externally powered and responsible for
transferring energy wirelessly to the sources. The source nodes may cooperate,
under either decode-and-forward or network coding-based protocols. Taking into
account the fact that the energy harvested by the source nodes is a function of
the fading realization of inter-user channels and user-destination channels, we
obtain a closed-form approximation for the system outage probability, as well
as an approximation for the optimal energy transfer period that minimizes such
outage probability. It is also shown that, even though the achievable diversity
order is reduced due to wireless energy transfer process, it is very close to
the one achieved for a network without energy constraints. Numerical results
are also presented to validate the theoretical results.

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The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
8
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: nucl-ex
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: econ
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The categories of this paper are: math-ph