Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: User Detection Performance Analysis for Grant-Free Uplink Transmission
  in Large-Scale Antenna Systems   In this paper, user detection performance of a grant-free uplink transmission
in a large scale antenna system is analyzed, in which a general grant-free
multiple access is considered as the system model and Zadoff-Chu sequence is
used for the uplink pilot. The false alarm probabilities of various user
detection schemes under the target detection probabilities are evaluated.

20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat