148 search results - page 22 / 30 » Spectrum Sensing in Wideband OFDM Cognitive Radios |
JSAC
2011
13 years 3 months ago
2011
Abstract— Spectrum management is used to improve performance in multiuser communication system, e.g., cognitive radio or femtocell networks, where multiuser interference can lead...
ICASSP
2011
IEEE
13 years 5 days ago
2011
IEEE
In this paper, we create a unified framework for spectrum sensing of signals which have covariance matrices with known eigenvalue multiplicities. We derive the generalized likeli...
JSAC
2008
13 years 8 months ago
2008
We propose the cross-layer based opportunistic multi-channel medium access control (MAC) protocols, which integrate the spectrum sensing at physical (PHY) layer with the packet sch...
ICC
2011
IEEE
12 years 8 months ago
2011
IEEE
—Spectrum awareness is one of the most challenging requirements in cognitive radio (CR). To adequately adapt to the changing radio environment, it is necessary for the CR to be a...
VTC
2007
IEEE
14 years 2 months ago
2007
IEEE
— With the advent of cognitive radio technology, new paradigms for spectrum access can achieve near-optimal spectrum utilization by letting users sense and utilize available spec...