Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-Orthogonal Multiple Access with Spatial Modulation in Downlink
  Coordinated Multipoint Transmission   In this paper, a joint transmission coordinated multi-point based
non-orthogonal multiple access (JT-COMP NOMA) combined with spatial modulation
(SM), termed as JT-COMP NOMA-SM, is proposed to enhance capacity. User capacity
and ergodic sum capacity (ESC) of M number coordinated multi-point base
stations (COMP BSs) within N number of cells are analyzed by considering
imperfect successive interference cancellation (SIC) and imperfect channel
state information (CSI). The performances of the proposed syatem are compared
with non-orthogonal multiple access (NOMA), and joint transmission coordinated
multi-point combined with virtual user pairing based non-orthogonal multiple
access (JT-COMP VP-NOMA) by both simulation and analysis. The results show that
the proposed system has the same cell center user (CCU) capacity compared to
JT-COMP VP-NOMA and a higher cell edge user (CEU) capacity than the other
schemes. ESC of the proposed system outperforms the other schemes due to
enhancing CEU capacity. Imperfect SIC and imperfect CSI may degrade capacity.
The proposed system can maintain CEU capacity better than the other schemes if
the number of cells is increased. It happens because SM works beyond Shannon
upper bounds which can mitigate inter-cell interference (ICI).

12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
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The categories of this paper are: dg-ga