Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Centralized Integrated Spectrum Sensing for Cognitive Radios   Spectrum sensing is the challenge for cognitive radio design and
implementation, which allows the secondary user to access the primary bands
without interference with primary users. Cognitive radios should decide on the
best spectrum band to meet the Quality of service requirements over all
available spectrum bands. This paper investigates the integrated centralized
spectrum sensing techniques in multipath fading environment and the performance
was analyzed with energy detection and wavelet based sensing techniques for
unknown signal. Keywords: Cognitive Radio, Spectrum Sensing, Signal Detection,
Primary User, Secondary User

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The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph