Team for Research in
Ubiquitous Secure Technology

Citation
B. Kusy, G.. Balogh, P. Volgyesi, J. Sallai, A. Nadas, A. Ledeczi, M. Maroti, L. Meertens. "Node-Density Independent Localization". Information Processing in Sensor Networks (IPSN 06) SPOTS Track, April, 2006.

Abstract
This paper presents an enhanced version of a novel radio interferometric positioning technique for node localization in wireless sensor networks that provides both high accuracy and long range simultaneously. The ranging method utilizes two transmitters emitting radio signals at almost the same frequencies. The relative location is estimated by measuring the relative phase offset of the generated interference signal at two receivers. Here, we analyze how the selection of carrier frequencies affects the precision and maximum range. Furthermore, we describe how the interplay of RF multipath and ground reflections degrades the ranging accuracy. To address these problems, we introduce a technique that continuously refines the range estimates as it converges to the localization solution. Finally, we present the results of a field experiment where our prototype achieved 4~cm average localization accuracy for a quasi-random deployment of 16 COTS motes covering the area of two football fields. The maximum range measured was 170~m, four times the observed communication range. Consequently, node deployment density is no longer constrained by the localization technique, but rather by the communication range.

Electronic downloads

• spot6144-kusy.pdf · application/pdf · 551 kbytes

• HTML

  B. Kusy, G.. Balogh, P. Volgyesi, J. Sallai, A. Nadas, A.
  Ledeczi, M. Maroti, L. Meertens. <a
  href="http://www.truststc.org/pubs/149.html"
  >Node-Density Independent Localization</a>,
  Information Processing in Sensor Networks (IPSN 06) SPOTS
  Track, April, 2006.

• Plain text

  B. Kusy, G.. Balogh, P. Volgyesi, J. Sallai, A. Nadas, A.
  Ledeczi, M. Maroti, L. Meertens. "Node-Density
  Independent Localization". Information Processing in
  Sensor Networks (IPSN 06) SPOTS Track, April, 2006.

• BibTeX

  @inproceedings{KusyBaloghVolgyesiSallaiNadasLedecziMarotiMeertens06_NodeDensityIndependentLocalization,
      author = {B. Kusy and G.. Balogh and P. Volgyesi and J.
                Sallai and A. Nadas and A. Ledeczi and M. Maroti
                and L. Meertens},
      title = {Node-Density Independent Localization},
      booktitle = {Information Processing in Sensor Networks (IPSN
                06) SPOTS Track},
      month = {April},
      year = {2006},
      abstract = {This paper presents an enhanced version of a novel
                radio interferometric positioning technique for
                node localization in wireless sensor networks that
                provides both high accuracy and long range
                simultaneously. The ranging method utilizes two
                transmitters emitting radio signals at almost the
                same frequencies. The relative location is
                estimated by measuring the relative phase offset
                of the generated interference signal at two
                receivers. Here, we analyze how the selection of
                carrier frequencies affects the precision and
                maximum range. Furthermore, we describe how the
                interplay of RF multipath and ground reflections
                degrades the ranging accuracy. To address these
                problems, we introduce a technique that
                continuously refines the range estimates as it
                converges to the localization solution. Finally,
                we present the results of a field experiment where
                our prototype achieved 4~cm average localization
                accuracy for a quasi-random deployment of 16 COTS
                motes covering the area of two football fields.
                The maximum range measured was 170~m, four times
                the observed communication range. Consequently,
                node deployment density is no longer constrained
                by the localization technique, but rather by the
                communication range.},
      URL = {http://www.truststc.org/pubs/149.html}
  }
  

Posted by Brano Kusy on 7 Dec 2006.
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