Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Wireless Information and Energy Transfer for Decode-and-Forward Relaying
  MIMO-OFDM Networks   This paper investigates the system achievable rate and optimization for the
multiple-input multiple-output (MIMO)-orthogonal frequency division
multiplexing (OFDM) system with an energy harvesting (EH) relay. Firstly we
propose a time switchingbased relaying (TSR) protocol to enable the
simultaneous information processing and energy harvesting at the relay. Then,
we discuss its achievable rate performance theoretically and formulated an
optimization problem to maximize the system achievable rate. As the problem is
difficult to solve, we design an Augmented Lagrangian Penalty Function (ALPF)
method for it. Extensive simulation results are provided to demonstrate the
accuracy of the analytical results and the effectiveness of the ALPF method.

31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex