199 search results - page 16 / 40 » Multiple antenna spectrum sensing in cognitive radios |
ICASSP
2009
IEEE
15 years 6 months ago
2009
IEEE
One of the major challenges to cognitive radios is the synchronization of distributed radios onto the same spectrum white spaces which vary in time and space. In this paper, we pr...
146
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VTC
2008
IEEE
15 years 6 months ago
2008
IEEE
This paper considers a scenario in which a secondary user makes opportunistic use of a channel allocated to some primary network. The primary network operates in a time-slotted ma...
ICCCN
2007
IEEE
15 years 6 months ago
2007
IEEE
To improve spectrum efficiency, future wireless devices will use cognitive radios to dynamically access spectrum. While offering great flexibility and softwarereconfigurability...
102
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VTC
2010
IEEE
14 years 10 months ago
2010
IEEE
— We consider the sensing of the frequency spectrum based on energy detection for cognitive radios. It has been shown that the reliability of the sensing can be improved by using...
103
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EJWCN
2010
14 years 6 months ago
2010
The spectrum scarcity problem emerged in recent years, due to unbalanced utilization of RF (radio frequency) bands in the current state of wireless spectrum allocations. Spectrum a...