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Analysis of detection performance in spectrum sensing optimisation for long sensing periods

By Kevin Chang, Bouchra Senadji and Vinod Chandran

Abstract

Spectrum sensing optimisation techniques maximise the efficiency of spectrum sensing while satisfying a number of constraints. Many optimisation models consider the possibility of the primary user changing activity state during the secondary user's transmission period. However, most ignore the possibility of activity change during the sensing period. The observed primary user signal during sensing can exhibit a duty cycle which has been shown to severely degrade detection performance. This paper shows that (a) the probability of state change during sensing cannot be neglected and (b) the true detection performance obtained when incorporating the duty cycle of the primary user signal can deviate significantly from the results expected with the assumption of no such duty cycle

Topics: 090609 Signal Processing, 099900 OTHER ENGINEERING, Spectrum Sensing, Cognitive Radio (CR), Spectrum Sensing Optimisation, Energy Detector
Publisher: IEEE
Year: 2011
DOI identifier: 10.1109/PIMRC.2011.6140002
OAI identifier: oai:eprints.qut.edu.au:42337

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