Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Throughput Maximization for Active Intelligent Reflecting Surface Aided
  Wireless Powered Communications   This paper considers an active intelligent reflecting surface (IRS)-aided
wireless powered communication network (WPCN), where devices first harvest
energy and then transmit information to a hybrid access point (HAP). Different
from the existing works on passive IRS-aided WPCNs, this is the first work that
introduces the active IRS in WPCNs. To guarantee fairness, the problem is
formulated as an amplifying power-limited weighted sum throughput (WST)
maximization problem, which is solved by successive convex approximation
technique and fractional programming alternatively. To balance the performance
and complexity tradeoff, three beamforming setups are considered at the active
IRS, namely user-adaptive IRS beamforming, uplink-adaptive IRS beamforming, and
static IRS beamforming. Numerical results demonstrate the significant
superiority of employing active IRS in WPCNs and the benefits of dynamic IRS
beamforming. Specifically, it is found that compared to the passive IRS, the
active IRS not only improves the WST greatly, but also is more energy-efficient
and can significantly extend the transmission coverage. Moreover, different
from the symmetric deployment strategy of passive IRS, it is more preferable to
deploy the active IRS near the devices.

14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex