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Distributed Spectrum Sensing with Two-Stage Detection for Cognitive Radio

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4 Author(s)
Alemseged, Y.D. ; Nat. Inst. of Inf. & Commun. Technol. (NICT), Yokosuka, Japan ; Chen Sun ; Tran, H.N. ; Harada, H.

In this paper we investigate spectrum sensing for cognitive radio (CR) by using multiple spectrum sensors. We explore sensing schemes based on soft information combining, hard information combining and a two-stage detection scheme that uses both soft information combining and hard information combining. The two-stage detection scheme is shown to provide improved performance compared to sensing based on either hard information combining or soft information combining alone with a trade-off of sensing time. Computer simulation results are provided to validate the concept.

Published in:

Vehicular Technology Conference Fall (VTC 2009-Fall), 2009 IEEE 70th

Date of Conference:

20-23 Sept. 2009