Optimal Detector Randomization in Cognitive Radio Systems in the Presence of Imperfect Sensing Decisions

In this study, optimal detector randomization is developed for secondary users in a cognitive radio system in the presence of imperfect spectrum sensing decisions. It is shown that the minimum average probability of error can be achieved by employing no more than four maximum a-posteriori probabilit...

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Veröffentlicht in:	IEEE communications letters 2014-02, Vol.18 (2), p.213-216
Hauptverfasser:	Sezer, Ahmet Dundar, Gezici, Sinan, Gursoy, Mustafa Cenk
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Channel estimation Cognitive radio detector randomization Detectors Exact sciences and technology Information, signal and communications theory Noise probability of error Radiocommunication specific techniques Radiocommunications Receivers Signal and communications theory Signal representation. Spectral analysis Signal, noise spectrum sensing Telecommunications Telecommunications and information theory
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Beschreibung
Zusammenfassung:	In this study, optimal detector randomization is developed for secondary users in a cognitive radio system in the presence of imperfect spectrum sensing decisions. It is shown that the minimum average probability of error can be achieved by employing no more than four maximum a-posteriori probability (MAP) detectors at the secondary receiver. Optimal MAP detectors and generic expressions for their average probability of error are derived in the presence of possible sensing errors. Also, sufficient conditions are presented related to improvements due to optimal detector randomization.
ISSN:	1089-7798 1558-2558
DOI:	10.1109/LCOMM.2013.120713.132423