Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Joint Power Splitting, Active and Passive Beamforming Optimization
  Framework for IRS Assisted MIMO SWIPT System   This paper considers an intelligent reflecting surface (IRS) assisted
multi-input multi-output (MIMO) power splitting (PS) based simultaneous
wireless information and power transfer (SWIPT) system with multiple PS
receivers (PSRs). The objective is to maximize the achievable data rate of the
system by jointly optimizing the PS ratios at the PSRs, the active transmit
beamforming (ATB) at the access point (AP), and the passive reflective
beamforming (PRB) at the IRS, while the constraints on maximum transmission
power at the AP, the reflective phase shift of each element at the IRS, the
individual minimum harvested energy requirement of each PSR, and the domain of
PS ratio of each PSR are all satisfied. For this unsolved problem, however,
since the optimization variables are intricately coupled and the constraints
are conflicting, the formulated problem is non-convex, and cannot be addressed
by employing exist approaches directly. To this end, we propose a joint
optimization framework to solve this problem. Particularly, we reformulate it
as an equivalent form by employing the Lagrangian dual transform and the
fractional programming transform, and decompose the transformed problem into
several sub-problems. Then, we propose an alternate optimization algorithm by
capitalizing on the dual sub-gradient method, the successive convex
approximation method, and the penalty-based majorization-minimization approach,
to solve the sub-problems iteratively, and obtain the optimal solutions in
nearly closed-forms. Numerical simulation results verify the effectiveness of
the IRS in SWIPT system and indicate that the proposed algorithm offers a
substantial performance gain.

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The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
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The categories of this paper are: comp-gas
9
The categories of this paper are: nlin