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Cooperative Spectrum Detection Algorithm Based on Likelihood Ratio Law for Cognitive Radio Systems

  • Jian Guo
  • Yanbin Shi
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7390)

Abstract

The cognitive radios must have the capability to determine if a signal from a primary transmitter is locally present in a certain spectrum. This paper proposed a cooperation algorithm for spectrum detection based on likelihood ratio for primary users’ detection in multi-user’s cognitive radio system, this algorithm has especially considered different channels decline with the state of decaying of the route between primary users and a lot of cognitive users, the single node detection adopts the energy law. According to the likelihood ratio law, the mathematical model is set up, and has simplified relevant parameters rationally, has reduced algorithm complexity.

Keywords

cognitive radios cooperation algorithm spectrum management likelihood ratio law 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Jian Guo
    • 1
  • Yanbin Shi
    • 2
  1. 1.Information Engineering InstituteUrumqi Vocational UniversityUrumqiChina
  2. 2.Aviation University of Air forceChangchunChina

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