10 search results - page 2 / 2 » Channel fragmentation in dynamic spectrum access systems: a ... |
ICC
2009
IEEE
14 years 22 hour ago
2009
IEEE
—Several measurement studies have found a large amount of underutilized radio spectrum. More flexible regulation employing dynamic spectrum access (DSA) has been proposed as sol...
WOWMOM
2009
ACM
13 years 11 months ago
2009
ACM
Abstract— Spectrum-agile radios, also known as cognitive radios, have a great potential to improve spectrum utilization by enabling dynamic access to the spectrum. A key challeng...
INFOCOM
2010
IEEE
13 years 3 months ago
2010
IEEE
Abstract—We consider a cognitive radio network where multiple secondary users (SUs) contend for spectrum usage, using random access, over available primary user (PU) channels. Ou...
MONET
2008
13 years 5 months ago
2008
This paper investigates a distributed and adaptive approach to manage spectrum usage in dynamic spectrum access networks. While previous works focus on centralized provisioning, w...
SECON
2010
IEEE
13 years 3 months ago
2010
IEEE
Wireless communications over water may suffer from serious multipath fading due to strong specular reflections from conducting water surfaces. Cognitive radios enable dynamic spect...