Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Decoupled Signal Detection for the Uplink of Large-Scale MIMO Systems in
  Heterogeneous Networks   Massive multiple-input multiple-output (MIMO) systems are strong candidates
for future fifth generation (5G) heterogeneous cellular networks. For 5G, a
network densification with a high number of different classes of users and data
service requirements is expected. Such a large number of connected devices
needs to be separated in order to allow the detection of the transmitted
signals according to different data requirements. In this paper, a decoupled
signal detection (DSD) technique which allows the separation of the uplink
signals, for each user class, at the base station (BS) is proposed for massive
MIMO systems. A mathematical signal model for massive MIMO systems with
centralized and distributed antennas in heterogeneous networks is also
developed. The performance of the proposed DSD algorithm is evaluated and
compared with existing detection schemes in a realistic scenario with
distributed antennas. A sum-rate analysis and a computational cost study for
DSD are also presented. Simulation results show an excellent performance of the
proposed DSD algorithm when combined with linear and successive interference
cancellation detection techniques.

14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con