Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Weighted Soft Decision for Cooperative Sensing in Cognitive Radio
  Networks   Enhancing the current services or deploying new services operating in RF
spectrum requires more licensed spectrum which may not be provided by the
regulatory bodies because of spectrum scarcity. On the contrary, recent studies
suggest that many portions of the licensed spectrum remains unused or underused
for significant period of time raising the issue of spectrum access without
license in an opportunistic manner. Among all the spectrum accessing
techniques, sensing based methods are considered optimal for their simplicity
and cost effectiveness. In this paper, we introduce a new cooperative spectrum
sensing technique which considers the spatial variation of secondary
(unlicensed) users and each user's contribution is weighted by a factor that
depends on received power and path loss. Compared to existing techniques, the
proposed one increases the sensing ability and spectrum utilization, and offers
greater robustness to noise uncertainty. Moreover, this cooperative technique
uses very simple energy detector as its building block thereby reduces the cost
and operational complexity.

4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int