2007 search results - page 22 / 402 » SPECTRUM |
MASS
2010
13 years 6 months ago
2010
Cognitive radio, which enables dynamic access of under-utilized licensed spectrums, is a promising technology for more efficient spectrum utilization. Since cognitive radio enables...
ICPR
2008
IEEE
14 years 2 months ago
2008
IEEE
In this study Principal Component Analysis (PCA), Non-negative Matrix Factorization (NMF) and Nonnegative Tensor Factorization (NTF) are applied as dimension reduction methods in ...
GLOBECOM
2007
IEEE
14 years 2 months ago
2007
IEEE
— Motorola Labs implemented an experimental cognitive radio system for use at the Dynamic Spectrum Access Networks (DySPAN) Symposium 2007. To exercise a practical communication ...
DAC
2005
ACM
13 years 10 months ago
2005
ACM
The cellular wireless market has begun the transition to data centric services including high speed internet access, video, high quality audio, and gaming. Communications technolo...
CORR
2008
Springer
13 years 8 months ago
2008
Springer
Abstract--We consider power control in cognitive radio networks where secondary users identify and exploit instantaneous and local spectrum opportunities without causing unacceptab...