21 search results - page 4 / 5 » Spectrum Sensing by Cognitive Radios at Very Low SNR |
JDCTA
2010
13 years 17 days 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...
ICASSP
2011
IEEE
12 years 9 months ago
2011
IEEE
Spectrum sensing is a challenging key component of the Cognitive Radio paradigm, since primary signals must be detected in the face of noise uncertainty and at signal-to-noise rat...
ICC
2007
IEEE
14 years 3 days ago
2007
IEEE
Abstract—Spectral sensing for the presence of ATSC DTV signals in VHF/UHF TV bands under a very low SNR environment is one of the core technologies in IEEE 802.22 WRAN. There are...
INFOCOM
2009
IEEE
14 years 13 days ago
2009
IEEE
—Dynamic spectrum access has been proposed as a means to share scarce radio resources, and requires devices to follow protocols that use resources in a proper, disciplined manner...
ICC
2011
IEEE
12 years 5 months ago
2011
IEEE
—Spectrum awareness is one of the most challenging requirements in cognitive radio (CR). To adequately adapt to the changing radio environment, it is necessary for the CR to be a...