148 search results - page 19 / 30 » Spectrum Sensing in Wideband OFDM Cognitive Radios |
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GLOBECOM
2010
IEEE
14 years 7 months ago
2010
IEEE
Cognitive radio (CR) emerges as a key technology to enhance spectrum efficiency and thus creates opportunistic transmissions over links. Supporting the routing function on top of n...
CORR
2008
Springer
14 years 10 months ago
2008
Springer
We study the problem of dynamic spectrum sensing and access in cognitive radio systems as a partially observed Markov decision process (POMDP). A group of cognitive users cooperati...
GLOBECOM
2008
IEEE
15 years 4 months ago
2008
IEEE
Abstract— We present a collaborative algorithm to enable opportunistic spectrum access for cognitive radios in the presence of multiple co-channel transmitters. A spectrum hole d...
TWC
2011
14 years 4 months ago
2011
Abstract—Regulation in Europe and Japan requires the implementation of detect-and-avoid (DAA) techniques in some bands for the coexistence of licensed primary systems and seconda...
JDCTA
2010
14 years 4 months ago
2010
With the intent of efficient occupying under-utilized spectrum, radio environment map (REM) based cognitive radio (CR) networking is proposed to facilitate the distributed spectru...