169 search results - page 33 / 34 » Opportunistic spectrum access for mobile cognitive radios |
MOBICOM
2009
ACM
13 years 12 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
13 years 11 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
13 years 11 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
13 years 11 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
12 years 9 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...