Grouping Technique for Cooperative Spectrum Sensing in Cognitive Radios
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22-10-2010, 05:30 PM

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Grouping Technique for Cooperative Spectrum Sensing in Cognitive Radios

Rizwan Akhtar, Adnan Rashdi and Abdul Ghafoor
Electrical Engineering Department, College of Signals, National University of Science & Technology, Pakistan


Cognitive networks can potentially solve the
problems of spectrum scarcity by accommodating unlicensed
(secondary) users in under-utilized segments of the spectrum.
Spectrum sensing serves as the primary stimulus for a cognitive
radio and is vitally important for ensuring that the unlicensed
users do not offer intolerable levels of interference to licensed
(primary) users. Cooperative spectrum sensing provides the
capability to cognitive networks to overcome problems related to
“hidden” primary users. In this paper, we present a novel
technique that takes advantage of cooperative diversity to
establish clustering among cooperating secondary users. This
technique is then extended to group-based spectrum sensing to
establish a tasking mechanism. The technique ensures enhanced
agility that will result in a reduction of interference to primary
users through their early detection.

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