Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Distributed Spatial Multiplexing Systems with Hardware Impairments and
  Imperfect Channel Estimation under Rank-$1$ Rician Fading Channels   The performance of a multiuser communication system with single-antenna
transmitting terminals and a multi-antenna base-station receiver is
analytically investigated. The system operates under independent and
non-identically distributed rank-$1$ Rician fading channels with imperfect
channel estimation and residual hardware impairments (compensation algorithms
are assumed, which mitigate the main impairments) at the transceiver. The
spatial multiplexing mode of operation is considered where all the users are
simultaneously transmitting their streams to the receiver. Zero-forcing is
applied along with successive interference cancellation (SIC) as a means for
efficient detection of the received streams. New analytical closed-form
expressions are derived for some important performance metrics, namely, the
outage probability and ergodic capacity of the entire system. Both the
analytical expressions and simulation results show the impact of imperfect
channel estimation and hardware impairments to the overall system performance
in the usage scenarios of massive MIMO and mmWave communication systems.

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The categories of this paper are: cond-mat
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The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
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The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
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The categories of this paper are: hep-lat
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The categories of this paper are: solv-int
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The categories of this paper are: math-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: chao-dyn
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The categories of this paper are: astro-ph
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The categories of this paper are: physics