@article {415,
	title = {Kernel Canonical Correlation Analysis for Robust Cooperative Spectrum Sensing in Cognitive Radio Networks},
	journal = {Transactions on Emerging Telecommunications Technologies},
	volume = {28},
	year = {2014},
	abstract = {Spectrum sensing is a key operation in Cognitive Radio (CR) systems, where secondary users (SUs) are able to exploit
spectrum opportunities by first detecting the presence of primary users (PUs). In a CR network composed of several
SUs, the detection accuracy can be much improved by cooperative spectrum sensing (CSS) strategies, which exploit the
spatial diversity among SUs. However, cooperative detection strategies, which are typically based on energy sensing, do
not perform satisfactorily under impairments such as non-Gaussian noise or interferences. In this paper, we propose a
scheme based on kernel canonical correlation analysis (KCCA), which is able to operate in non-ideal scenarios and in a
totally blind fashion. This technique is performed at the fusion center (FC) by exploiting the non-linear correlation among
the received signals of each SU. In this manner, statistical tests are extracted, allowing the SUs to make decisions either
autonomously at each SU or cooperatively at the FC. The performance of the KCCA-based detector is evaluated by means
of simulations and over-the-air experiments using a CR testbed composed of several Universal Radio Peripheral (USRP)
nodes. Both the simulations and the measurements show that the KCCA-based detector is able to obtain a significant
gain over a conventional energy detector, whose sensing performance is severely degraded by the presence of external
interferers.},
	keywords = {Cooperative Spectrum Sensing, Hardware Testbed, Kernel Canonical Correlation Analysis, USRP},
	issn = {2161-3915},
	doi = {10.1002/ett.2896},
	author = {Manco-V{\'a}squez, Julio and Van Vaerenbergh, Steven and V{\'\i}a, Javier and Santamar{\'\i}a, Ignacio}
}
