21 search results - page 2 / 5 » Spectrum Sensing by Cognitive Radios at Very Low SNR |
JCIT
2010
13 years 3 days ago
2010
Lack of robustness against noise uncertainty is a bottleneck of current spectrum sensing strategies to detect the primary signals. Due to noise uncertainty, the performance of tra...
CORR
2010
Springer
13 years 2 months ago
2010
Springer
Abstract--We consider cooperative spectrum sensing for cognitive radios. We develop an energy efficient detector with low detection delay using sequential hypothesis testing. Seque...
ICASSP
2011
IEEE
12 years 9 months ago
2011
IEEE
In cognitive radio (CR) networks, multi-CR cooperation typically takes place during spectrum sensing, to cope with wireless fading effects and the hidden terminal problem. The use...
GLOBECOM
2007
IEEE
13 years 11 months ago
2007
IEEE
—One of the main requirements of cognitive radio systems is the ability to reliably detect the presence of licensed primary transmissions. Previous works on the problem of detect...
TWC
2010
13 years 30 min 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...