199 search results - page 36 / 40 » Multiple antenna spectrum sensing in cognitive radios |
75
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JSAC
2008
14 years 9 months ago
2008
A cognitive radio can sense its environment and adapt some of its features, such as carrier frequency, transmission bandwidth, transmission power, and modulation, thus allowing dyn...
103
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CORR
2011
Springer
14 years 1 months ago
2011
Springer
—The fundamental problem of multiple secondary users contending for opportunistic spectrum access over multiple channels in cognitive radio networks has been formulated recently ...
CISS
2007
IEEE
15 years 3 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...
JSAC
2011
14 years 4 months ago
2011
— We investigate spectrum sensing by energy detection based on two different objective functions: a Bayesian sensing cost or the network weighted sum capacity. The Bayesian cost ...
WCNC
2010
IEEE
14 years 7 months ago
2010
IEEE
—In this paper, we present an interference model for cognitive radio (CR) networks employing power control or contention control scheme. The probability density functions (PDFs) ...