Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Improving Cell-Free Massive MIMO Detection Performance via Expectation
  Propagation   Cell-free (CF) massive multiple-input multiple-output (M-MIMO) technology
plays a prominent role in the beyond fifth-generation (5G) networks. However,
designing a high performance CF M-MIMO detector is a challenging task due to
the presence of pilot contamination which appears when the number of pilot
sequences is smaller than the number of users. This work proposes a CF M-MIMO
detector referred to as CF expectation propagation (CF-EP) that incorporates
the pilot contamination when calculating the posterior belief. The simulation
results show that the proposed detector achieves significant improvements in
terms of the bit-error rate and sum spectral efficiency performances as
compared to the ones of the state-of-the-art CF detectors.

1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org