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.
Original language | English (US) |
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Article number | 6697912 |
Pages (from-to) | 213-216 |
Number of pages | 4 |
Journal | IEEE Communications Letters |
Volume | 18 |
Issue number | 2 |
DOIs | |
State | Published - Feb 2014 |
Keywords
- Cognitive radio
- detector randomization
- probability of error
- spectrum sensing
ASJC Scopus subject areas
- Modeling and Simulation
- Computer Science Applications
- Electrical and Electronic Engineering