Optimal detector randomization in cognitive radio systems in the presence of imperfect sensing decisions

Ahmet Dundar Sezer, Sinan Gezici, Mustafa Cenk Gursoy

Research output: Contribution to journalArticle

2 Scopus citations

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 languageEnglish (US)
Article number6697912
Pages (from-to)213-216
Number of pages4
JournalIEEE Communications Letters
Volume18
Issue number2
DOIs
StatePublished - Feb 1 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

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