40 search results - page 8 / 8 » Power allocation optimization in OFDM-based cognitive radios... |
JCST
2008
13 years 5 months ago
2008
The allocation of bandwidth to unlicensed users, without significantly increasing the interference on the existing licensed users, is a challenge for Ultra Wideband (UWB) networks....
WCNC
2010
IEEE
13 years 9 months ago
2010
IEEE
Abstract—In cognitive mobile multihop relay (CMMR) network, the mobile user as the primary user is allocated with the channel for transmitting data. Relay station as the secondar...
WICOMM
2010
13 years 3 months ago
2010
The rapid proliferation of wireless systems makes interference management more and more important. This paper presents a novel cognitive coexistence framework, which enables an in...
CISS
2007
IEEE
13 years 11 months ago
2007
IEEE
— We propose an expectation-maximization (EM) technique for locating multiple transmitters based on power levels observed by a set of arbitrarily-placed receivers. Multiple trans...
MOBICOM
2009
ACM
13 years 12 months ago
2009
ACM
In November 2008, the FCC ruled that the digital TV whitespaces be used for unlicensed access. This is an exciting development because DTV whitespaces are in the low frequency ran...