Double Thresholds Based Cooperative Spectrum Sensing Against Untrusted Secondary Users in Cognitive Radio Networks

Spectrum sensing is an essential mechanism in a cognitive radio network. However, the detection performance will be greatly degraded when few untrusted secondary users exist which can be identified as 'Always Yes' users and 'Always No' users. In this paper, we propose an energy d...

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Bibliographic Details
Published inVTC Spring 2009 - IEEE 69th Vehicular Technology Conference pp. 1 - 5
Main Authors Shaoyi Xu, Yanlei Shang, Haiming Wang
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.04.2009
Subjects
Chromium
Cognitive radio
Degradation
Detectors
Electronic mail
Emulation
Investments
Matched filters
Testing
Transmitters
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Summary:Spectrum sensing is an essential mechanism in a cognitive radio network. However, the detection performance will be greatly degraded when few untrusted secondary users exist which can be identified as 'Always Yes' users and 'Always No' users. In this paper, we propose an energy detector with double thresholds combined with revised data fusion rules to find these untrusted users and counteract their malicious effects. Probabilities of detection and false alarm of three kinds of revised data fusion rules are derived. Compared with the conventional cooperative methods, our method can get a better detection performance.
ISSN:1550-2252
DOI:10.1109/VETECS.2009.5073511