ENERGY BASED SPECTRUM SENSING USING WAVELET TRANSFORM FOR FADING CHANNELS


Bektas C., Akan A., Odabasioglu N.

4th International Congress on Ultra Modern Telecommunications and Control Systems (ICUMT), St Petersburg, Russia, 3 - 05 October 2012, pp.207-211 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Volume:
  • Doi Number: 10.1109/icumt.2012.6459666
  • City: St Petersburg
  • Country: Russia
  • Page Numbers: pp.207-211

Abstract

In this paper, we present a spectrum sensing algorithm based on energy level at different frequency bands using wavelet transform for Cognitive Radio (CR) applications. Existence of a primary user's signal may be detected by searching for wavelet coefficients having energy higher than a threshold value corresponding to communication channel noise energy. The wavelet based algorithm is tested with Binary Phase Shift Keying (BPSK) modulated signals under two channel models introducing fading channel affect and additive white Gaussian noise with different Signal to Noise Ratios (SNRs). In order to evaluate accuracy of the algorithm, probability of detection is evaluated.