Title :
Analysis of detection performance in spectrum sensing optimisation for long sensing periods
Author :
Chang, Kevin ; Senadji, Bouchra ; Chandran, Vinod
Author_Institution :
Sch. of Eng. Syst., Queenland Univ. of Technol., Brisbane, QLD, Australia
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 and assume the activity state is constant without validating or enforcing this assumption. 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.
Keywords :
optimisation; probability; radio spectrum management; signal detection; detection performance; duty cycle; long sensing period; optimisation model; primary user signal; probability; spectrum sensing optimisation; state change;
Conference_Titel :
Personal Indoor and Mobile Radio Communications (PIMRC), 2011 IEEE 22nd International Symposium on
Conference_Location :
Toronto, ON
Print_ISBN :
978-1-4577-1346-0
Electronic_ISBN :
pending
DOI :
10.1109/PIMRC.2011.6140002