6th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications

Research Article

Spectrum Sensing in Public Safety Applications: The 2-D LAD ACC Method

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  • @INPROCEEDINGS{10.4108/icst.crowncom.2011.245843,
        author={Johanna Vartiainen and Janne Lehtom\aa{}ki and Timo Br\aa{}ysy and Kenta Umebayashi},
        title={Spectrum Sensing in Public Safety Applications: The 2-D LAD ACC Method},
        proceedings={6th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications},
        publisher={IEEE},
        proceedings_a={CROWNCOM},
        year={2012},
        month={5},
        keywords={public safety cognitive radio spectrum sensing},
        doi={10.4108/icst.crowncom.2011.245843}
    }
    
  • Johanna Vartiainen
    Janne Lehtomäki
    Timo Bräysy
    Kenta Umebayashi
    Year: 2012
    Spectrum Sensing in Public Safety Applications: The 2-D LAD ACC Method
    CROWNCOM
    IEEE
    DOI: 10.4108/icst.crowncom.2011.245843
Johanna Vartiainen1, Janne Lehtomäki1, Timo Bräysy1, Kenta Umebayashi2,*
  • 1: University of Oulu, Centre for Wireless Communications
  • 2: Tokyo University of Agriculture and Technology
*Contact email: ume_k@cc.tuat.ac.jp

Abstract

Public safety communications (PSC) are invaluable in safety critical scenarios such as floods or earthquakes when commercial communication systems fall down. Cognitive radio(CR) approach that is independent of other communication systems provides flexibility and certainty. One of the key issues is to reliably find unused radio channels also in the situations when there is no a priori information about possible other users. In this paper, we propose using the two-dimensional localization algorithm based on double-thresholding with adjacent cluster combining (2-D LAD ACC) method for detecting free channels. It is low-complex, blind and able to operate in any frequency area. This paper applies the 2-D LAD ACC method for realworld channel measurement data for the first time. The indoor measurements at WLAN bands verify that the 2-D LAD ACC method is able to operate in the real-life situation.