2007 search results - page 50 / 402 » SPECTRUM |
TWC
2010
13 years 4 months ago
2010
In this paper, we consider the problem of spectrum sensing by using multiple antenna in cognitive radios when the noise and the primary user signal are assumed as independent compl...
AINA
2011
IEEE
13 years 1 months ago
2011
IEEE
— Next generation wireless networks will be heterogeneous, where several primary users (PU e.g. licensed users) and secondary users (SU e.g. unlicensed users) can operate in the ...
ICC
2011
IEEE
12 years 9 months ago
2011
IEEE
—Femtocells have been considered by the wireless industry as a promising solution not only to improve indoor coverage, but also to unload traffic from already overburdened macroc...
TON
2012
12 years 7 days ago
2012
—Cognitive Radio (CR) technology has great potential to alleviate spectrum scarcity in wireless communications. It allows secondary users (SUs) to opportunistically access spectr...
ICIP
2005
IEEE
14 years 11 months ago
2005
IEEE
This paper presents novel techniques for detecting watermarks in images in a known-cover attack framework using natural scene models. Specifically, we consider a class of watermar...