Spectrum Sensing in the Presence of Multiple Primary Users

Author

Wei, Lu ; Tirkkonen, Olav

Author_Institution

Dept. of Commun. & Networking, Aalto Univ., Aalto, Finland

Volume

60

Issue

5

fYear

2012

fDate

5/1/2012 12:00:00 AM

Firstpage

1268

Lastpage

1277

Abstract

We consider multi-antenna cooperative spectrum sensing in cognitive radio networks, when there may be multiple primary users. A detector based on the spherical test is analyzed in such a scenario. Based on the moments of the distributions involved, simple and accurate analytical formulae for the key performance metrics of the detector are derived. The false alarm and the detection probabilities, as well as the detection threshold and Receiver Operation Characteristics are available in closed form. Simulations are provided to verify the accuracy of the derived results, and to compare with other detectors in realistic sensing scenarios.

Keywords

antennas; cognitive radio; cooperative communication; probability; radio receivers; cognitive radio networks; detection probabilities; multi-antenna cooperative spectrum sensing; multiple primary users; receiver operation characteristics; Approximation methods; Covariance matrix; Detectors; Eigenvalues and eigenfunctions; Noise; Uncertainty; Cognitive radio; multiple primary users; spectrum sensing; the spherical test;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2012.022912.110073

Filename

6164081