Spectrum Usage in Cognitive Radio Networks: From Field Measurements to Empirical Models

Miguel LÓPEZ-BENÍTEZ  Fernando CASADEVALL  

Publication
IEICE TRANSACTIONS on Communications   Vol.E97-B   No.2   pp.242-250
Publication Date: 2014/02/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E97.B.242
Print ISSN: 0916-8516
Type of Manuscript: INVITED PAPER (Special Section on Technologies for Effective Utilization of Spectrum White Space)
Category: 
Keyword: 
cognitive radio,  dynamic spectrum access,  spectrum usage,  spectrum measurements,  spectrum models,  

Full Text: FreePDF(1.7MB)


Summary: 
Cognitive Radio (CR) is aimed at increasing the efficiency of spectrum utilization by allowing unlicensed users to access, in an opportunistic and non-interfering manner, some licensed bands temporarily and/or spatially unoccupied by the licensed users. The analysis of CR systems usually requires the spectral activity of the licensed system to be represented and characterized in a simple and tractable, yet accurate manner, which is accomplished by means of spectrum models. In order to guarantee the realism and accuracy of such models, the use of empirical spectrum occupancy data is essential. In this context, this paper explains the complete process of spectrum modeling, from the realization of field measurements to the obtainment of the final validated model, and highlights the main relevant aspects to be taken into account when developing spectrum usage models for their application in the context of the CR technology.