Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multi-antenna Enabled Cluster-based Cooperation in Wireless Powered
  Communication Networks   In this paper, we consider a wireless powered communication network (WPCN)
consisting of a multi-antenna hybrid access point (HAP) that transfers wireless
energy to and receives sensing data from a cluster of low-power wireless
devices (WDs). To enhance the throughput performance of some far-away WDs, we
allow one of the WDs to act as the cluster head (CH) that helps forward the
messages of the other cluster members (CMs). However, the performance of the
proposed cluster-based cooperation is fundamentally limited by the high energy
consumption of the CH, who needs to transmit all the WDs' messages including
its own. To tackle this issue, we exploit the capability of multi-antenna
energy beamforming (EB) at the HAP, which can focus more transferred power to
the CH to balance its energy consumption in assisting the other WDs.
Specifically, we first derive the throughput performance of each individual WD
under the proposed scheme. Then, we jointly optimize the EB design, the
transmit time allocation among the HAP and the WDs, and the transmit power
allocation of the CH to maximize the minimum data rate achievable among all the
WDs (the max-min throughput) for improved throughput fairness among the WDs. An
efficient optimal algorithm is proposed to solve the joint optimization
problem. Moreover, we simulate under practical network setups and show that the
proposed multi-antenna enabled cluster-based cooperation can effectively
improve the throughput fairness of WPCN.

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The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
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The categories of this paper are: q-alg
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The categories of this paper are: chao-dyn
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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: comp-gas
4
The categories of this paper are: cond-mat
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The categories of this paper are: patt-sol
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The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
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The categories of this paper are: adap-org
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-lat