SciELO - Scientific Electronic Library Online

vol.20 issue2Broadband diplexer design based in waveguide technology for satellite applicationsDesign of image codec based on Bandelet transform using a NIOS II processor author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Ingeniare. Revista chilena de ingeniería

On-line version ISSN 0718-3305


PEDRAZA, Luis Fernando; FORERO, Felipe  and  PAEZ, Ingrid Patricia. Spectrum sensing for cognitive radio. Ingeniare. Rev. chil. ing. [online]. 2012, vol.20, n.2, pp.197-210. ISSN 0718-3305.

This survey article focuses on the physical layer for cognitive radio (CR) networks, namely the techniques to detect the presence/absence of licensed users in the different spectrum bands. The techniques presented in this article, including their advantages and disadvantages, are organized in a hierarchical fashion as follows: fundamental detection techniques (energy-based detection, matched filter, and cyclostationarity features), fundamental-detection-based techniques (waveform detection, radio identification, local-oscillator leakage power), and alternative techniques that are typical of the image analysis domain (Hough and Wavelet transforms). Additionally, the main challenges associated to licensed user detection are described together with the various spectral dimensions where cognitive radio devices can find new spectrum opportunities.

Keywords : Cognitive radio; spectrum sensing; primary users; secondary users; dynamic spectrum allocation; spectrum holes.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License