199 search results - page 5 / 40 » Multiple antenna spectrum sensing in cognitive radios |
CISS
2008
IEEE
15 years 6 months ago
2008
IEEE
Abstract— According to the cognitive radio paradigm, a terminal or subsystem will opportunistically select a frequency band for data transmission. Because the spectrum is shared,...
135
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INFOCOM
2012
IEEE
13 years 2 months ago
2012
IEEE
Cognitive radio (CR) techniques improve the spectrum utilization by exploiting temporarily-free frequency bands (i.e., in the time domain). The spectrum utilization can be boosted...
ICC
2007
IEEE
15 years 6 months ago
2007
IEEE
— Cognitive radio has been recently proposed as a promising technology to improve the spectrum utilization efficiency by intelligently sensing and accessing some vacant bands of...
127
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GLOBECOM
2009
IEEE
14 years 9 months ago
2009
IEEE
Primary user emulation attack in multichannel cognitive radio systems is discussed. An attacker is assumed to be able to send primary-user-like signals during spectrum sensing peri...
123
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GLOBECOM
2010
IEEE
14 years 9 months ago
2010
IEEE
In a cognitive radio network, the full-spectrum is usually divided into multiple channels. However, due to the hardware and energy constraints, a cognitive user (also called second...