Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A New Millimeter Wave MIMO System for 5G Networks   Millimeter Wave (mmWave) band provides a large spectrum to meet the
high-demand capacity by the 5th generation (5G) wireless networks. However, to
fully exploit the available spectrum, obstacles such as high path loss, channel
sparsity, and hardware complexity should be overcome. To this end, the present
paper aims to design a new multiple-input multiple-output (MIMO) system using
lens-based multi-beam reconfigurable antennas. The proposed MIMO system uses
complete lens at the transmitter and incomplete lens at the receiver. To reduce
hardware complexity, we utilize an optimal beam selection technique. Our
analysis demonstrates that the proposed MIMO system along with the optimal beam
selection technique increases the average signal-to-noise ratio (SNR). Also,
simulations show that the system achieves full-diversity gain.

5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph