DocumentCode
43186
Title
Optimal Detector Randomization in Cognitive Radio Systems in the Presence of Imperfect Sensing Decisions
Author
Sezer, Ahmet Dundar ; Gezici, Sinan ; Gursoy, M. Cenk
Author_Institution
Dept. of Electr. & Electron. Eng., Bilkent Univ., Ankara, Turkey
Volume
18
Issue
2
fYear
2014
fDate
Feb-14
Firstpage
213
Lastpage
216
Abstract
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.
Keywords
cognitive radio; maximum likelihood estimation; probability; cognitive radio systems; imperfect sensing decisions; maximum a-posteriori probability detectors; optimal detector randomization; Channel estimation; Cognitive radio; Detectors; Noise; Receivers; Cognitive radio; detector randomization; probability of error; spectrum sensing;
fLanguage
English
Journal_Title
Communications Letters, IEEE
Publisher
ieee
ISSN
1089-7798
Type
jour
DOI
10.1109/LCOMM.2013.120713.132423
Filename
6697912
Link To Document