169 search results - page 33 / 34 » Opportunistic spectrum access for mobile cognitive radios |
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MOBICOM
2009
ACM
15 years 3 months ago
2009
ACM
There has been burgeoning interest in wireless technologies that can use wider frequency spectrum. Technology advances, such as 802.11n and ultra-wideband (UWB), are pushing towar...
DSD
2008
IEEE
15 years 3 months ago
2008
IEEE
— The mobile communication systems today, have different radio spectrum, radio access technologies, and protocol stacks depending on the network being utilized. This gives rise t...
GLOBECOM
2008
IEEE
15 years 3 months ago
2008
IEEE
— Accurate detection of spectrum opportunities within the frequency band of an orthogonal frequency division multiple access (OFDMA) system is a critical requirement for the real...
WIMOB
2008
IEEE
15 years 3 months ago
2008
IEEE
—Wireless networking is currently dominated by radio frequency (RF) techniques. However, the soon-to-be ubiquity of LED-based lighting motivated by significant energy savings pro...
WIOPT
2011
IEEE
14 years 1 months ago
2011
IEEE
Abstract—This paper considers maximizing throughput utility in a multi-user network with partially observable Markov ON/OFF channels. Instantaneous channel states are never known...