DocumentCode :
3568011
Title :
Locally best invariant test for multiple primary user spectrum sensing
Author :
Wei, Lu ; Dharmawansa, Prathapasinghe ; Tirkkonen, Olav
Author_Institution :
Dept. of Commun. & Networking, Aalto Univ., Aalto, Finland
fYear :
2012
Firstpage :
367
Lastpage :
372
Abstract :
We consider multi-antenna cooperative spectrum sensing in cognitive radio networks, when there may be multiple primary users. A noise-uncertainty-free detector that is optimal in the low signal to noise ratio regime is analyzed in such a scenario. Specifically, we derive the exact moments of the test statistics involved, which lead to simple and accurate analytical formulae for the false alarm probability and the decision threshold. Simulations are provided to examine the accuracy of the derived results, and to compare with other detectors in realistic sensing scenarios. From the considered simulation settings, performance gain over several known detection algorithms is observed in scenarios with relatively low signal to noise ratio.
Keywords :
cognitive radio; cooperative communication; cognitive radio networks; decision threshold; detection algorithms; false alarm probability; locally best invariant test; multiantenna cooperative spectrum sensing; multiple primary users; noise-uncertainty-free detector; signal to noise ratio regime; spectrum sensing; Approximation methods; Covariance matrix; Detectors; Eigenvalues and eigenfunctions; Signal to noise ratio; Cognitive radio; locally best invariant test; multi-antenna spectrum sensing; multiple primary users;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Cognitive Radio Oriented Wireless Networks and Communications (CROWNCOM), 2012 7th International ICST Conference on
ISSN :
2166-5370
Print_ISBN :
978-1-4673-2976-7
Electronic_ISBN :
2166-5370
Type :
conf
Filename :
6333769
Link To Document :
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