7th International Conference on Cognitive Radio Oriented Wireless Networks

Research Article

Field measurements of WSD–DTT protection ratios over outdoor and indoor reference geometries

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  • @INPROCEEDINGS{10.4108/icst.crowncom.2012.248442,
        author={Pekka Talmola and Juha Kalliovaara and Jarkko Paavola and Reijo Ekman and Atte Vainisto and Niko Aurala and Heikki Kokkinen and Kari Heiska and Risto Wichman and Jussi Poikonen},
        title={Field measurements of WSD--DTT protection ratios over outdoor and indoor reference geometries},
        proceedings={7th International Conference on Cognitive Radio Oriented Wireless Networks},
        publisher={IEEE},
        proceedings_a={CROWNCOM},
        year={2012},
        month={7},
        keywords={tv white spaces reference geometries field measurements protection ratios},
        doi={10.4108/icst.crowncom.2012.248442}
    }
    
  • Pekka Talmola
    Juha Kalliovaara
    Jarkko Paavola
    Reijo Ekman
    Atte Vainisto
    Niko Aurala
    Heikki Kokkinen
    Kari Heiska
    Risto Wichman
    Jussi Poikonen
    Year: 2012
    Field measurements of WSD–DTT protection ratios over outdoor and indoor reference geometries
    CROWNCOM
    IEEE
    DOI: 10.4108/icst.crowncom.2012.248442
Pekka Talmola1, Juha Kalliovaara2, Jarkko Paavola3, Reijo Ekman3, Atte Vainisto3, Niko Aurala3, Heikki Kokkinen4, Kari Heiska5, Risto Wichman6, Jussi Poikonen6,*
  • 1: Nokia
  • 2: University of Turku
  • 3: Turku University of Applied Sciences
  • 4: Fairspectrum
  • 5: Digita
  • 6: Aalto University
*Contact email: jussi.poikonen@aalto.fi

Abstract

A currently prevalent view of the operation of white space cognitive radios is that they should use geolocation databases to determine their frequency band and maximum transmission power in any given location so that interference radiated to broadcast receivers is negligible. To estimate the level of such interference, physical reference geometries and path loss estimates have been proposed between co-located devices. In this paper we present results of a measurement campaign conducted over indoor and outdoor reference geometry scenarios in a digital terrestrial television test network. Applying a subjective error criterion, we provide practical estimates on the maximum relative transmit powers for white space devices in order to avoid visible interference in television reception. The study applies to various primary and secondary transmission and reception scenarios, and its results can be extended also to estimate protection ratios for signal configurations not considered in the reported measurements.