212 search results - page 42 / 43 » A dynamic spectrum access scheme for cognitive radio network... |
INFOCOM
2005
IEEE
13 years 11 months ago
2005
IEEE
— Even though multiple non-overlapped channels exist in the 2.4GHz and 5GHz spectrum, most IEEE 802.11-based multi-hop ad hoc networks today use only a single channel. As a resul...
ICC
2007
IEEE
13 years 11 months ago
2007
IEEE
Ultra wideband (UWB) systems are currently an important wireless infrastructure for efficient shortrange communications. To improve the system efficiency while guaranteeing the ra...
DSN
2003
IEEE
13 years 10 months ago
2003
IEEE
The presence of physical obstacles and radio interference results in the so called “shadow regions” in wireless networks. When a mobile station roams into a shadow region, it ...
TWC
2010
13 years 15 hour ago
2010
In this paper, cooperative transmission protocols are proposed for wireless broadcast channels, a fundamental building block of wireless communication networks. The concepts of co...
ICC
2009
IEEE
14 years 2 days ago
2009
IEEE
Abstract— Relaying and orthogonal frequency division multiple access (OFDMA) are the accepted technologies for emerging wireless communications standards. The activities in many ...