Research Article Open Access

Review of Energy Detection for Spectrum Sensing in Various Channels and its Performance for Cognitive Radio Applications

R. Suresh Babu1 and M. Suganthi2
  • 1 Kamaraj College of Engineering and Technology, India
  • 2 Thiagarajar College of Engineering, Madurai
American Journal of Engineering and Applied Sciences
Volume 5 No. 2, 2012, 151-156

DOI: https://doi.org/10.3844/ajeassp.2012.151.156

Submitted On: 28 April 2012 Published On: 4 August 2012

How to Cite: Babu, R. S. & Suganthi, M. (2012). Review of Energy Detection for Spectrum Sensing in Various Channels and its Performance for Cognitive Radio Applications. American Journal of Engineering and Applied Sciences, 5(2), 151-156. https://doi.org/10.3844/ajeassp.2012.151.156

Abstract

Spectrum sensing is the basic and important operation in Cognitive Radio (CR) to find the unused spectrum. Energy detector is a popular sensing method because it doesn’t require transmitted signal properties, channel information, of even the type of modulation. This study summarizes the performance result of energy detector over Additive White Gaussian Noise (AWGN), Rayleigh fading and Nakagami fading channels. Energy detection with soft decision and hard decision are also studied for different number of cognitive nodes as well as each cognitive node having multiple antennas. The performance of hard decision and soft decision are evaluated by means of complementary Receiver Operating Characteristic (ROC) curves. It clearly shows that the probability of missing detection decreases for increasing the number of antennas in cognitive node and also increasing of cooperated cognitive users.

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Keywords

  • Cognitive Radio
  • Spectrum Sensing
  • Energy Detection
  • Diversity Reception
  • Soft and Hard Decision
  • Rayleigh Fading
  • Cognitive Radio (CR)
  • Cognitive Nodes