175 search results - page 33 / 35 » Adaptive spectrum sensing for agile cognitive radios |
SIPS
2008
IEEE
14 years 2 months ago
2008
IEEE
This paper describes the sub-Nyquist rate digital-to-analog conversion technique for a direct waveform synthesis (DWS) transmitter. IEEE 802.22 TV band Cognitive Radio (CR) transm...
CCR
2011
13 years 2 months ago
2011
Proliferation and innovation of wireless technologies require significant amounts of radio spectrum. Recent policy reforms by the FCC are paving the way by freeing up spectrum fo...
ICASSP
2011
IEEE
12 years 11 months ago
2011
IEEE
A nonparametric version of the basis pursuit method is developed for field estimation. The underlying model entails known bases, weighted by generic functions to be estimated fro...
MOBICOM
2009
ACM
14 years 2 months ago
2009
ACM
In November 2008, the FCC ruled that the digital TV whitespaces be used for unlicensed access. This is an exciting development because DTV whitespaces are in the low frequency ran...
CORR
2007
Springer
13 years 7 months ago
2007
Springer
We consider a multi-channel opportunistic communication system where the states of these channels evolve as independent and statistically identical Markov chains (the Gilbert-Elli...