Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Improved Multiuser Detection in Asynchronous Flat-Fading Non-Gaussian
  Channels   In this paper, a new M-estimator based multiuser detection in asynchronous
flat-fading non-Gaussian CDMA channels is considered. A new closed-form
expression is derived for the characteristic function of the multiple-access
interference signals. Simulation results are provided to prove the
effectiveness of the derived bit-error probabilities obtained with this
expression in asynchronous flat-fading non-Gaussian CDMA channels.

34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
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The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
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The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th