43 search results - page 4 / 9 » Spectral Efficiency of Cognitive Radio Systems |
GLOBECOM
2008
IEEE
14 years 10 months ago
2008
IEEE
Efficient and reliable power allocation algorithm in Cognitive radio (CR) networks is a challenging problem. Traditional water-filling algorithm is inefficient for CR networks due ...
PIMRC
2010
IEEE
14 years 8 months ago
2010
IEEE
This paper proposes the utilization of GSM logical channels (RACH, AGCH and TCH) and UMTS signaling (MIB and SIBs) of the Broadcast Channel to transmit a Cognitive Beacon Channel (...
ICC
2007
IEEE
15 years 4 months ago
2007
IEEE
Cognitive radio is generally understood as an intelligent wireless communication system aiming at the efficient utilization of radio resources. We argue for the extension of its sc...
ICASSP
2009
IEEE
15 years 4 months ago
2009
IEEE
—Spectrum access is an important function of cognitive radios for detecting and utilizing spectrum holes without harming the legacy systems. In this paper, we propose novel coope...
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GLOBECOM
2007
IEEE
15 years 4 months ago
2007
IEEE
Abstract—Cognitive radio is a key enabling technology of dynamic spectrum access for exploiting unused spectrum resources. This article focuses on modeling the opportunity for ce...