A Two-Stage Spectrum Sensing Scheme Based on Cyclostationarity in Cognitive Radio

Ying-pei LIN
Chen HE
Ling-ge JIANG

IEICE TRANSACTIONS on Communications   Vol.E94-B    No.9    pp.2681-2684
Publication Date: 2011/09/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.2681
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
cognitive radio,  cyclostationary feature detection,  two-stage spectrum sensing,  sensing time,  

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A spectrum sensing scheme for cognitive radio that includes coarse and fine sensing stages based on cyclostationarity is proposed in this paper. The cyclostationary feature detection (CFD) based on a single cyclic frequency (SCF) is used in the coarse sensing stage and that based on multiple cyclic frequencies (MCF) is employed in the fine sensing stage. Whether the fine sensing stage is performed or not is decided by comparing the statistic constructed in the coarse sensing stage with two thresholds. Theoretical analyses and simulation results show that the proposed sensing scheme has superior sensing performance and needs shorter sensing time.