Title: Evaluating GPS Data in Indoor Environments
Authors: Motte, Henk ×
Wyffels, Jeroen
De Strycker, Lieven
Goemaere, Jean Pierre #
Issue Date: Aug-2011
Publisher: Faculty of Electrical Engineering and Computer Science, Stefan cel Mare University of Suceava
Series Title: Advances in Electrical and Computer Engineering vol:11 issue:3 pages:25-28
Abstract: With the latest generation of ultra-sensitive GPSreceivers,
satellite signals can often be picked up even indoors,
resulting in (inaccurate) indoor GPS-localization. A covered
position will therefore no longer be characterized by the
absence of satellite signals, creating the need for another way of
categorizing this data as potentially inaccurate. This paper
describes the use of GPS-based localization in an indoor
environment. Only high level, generally available, GPS-data
(NMEA-0183 GNSS-subset) are taken into account.
Applications of ubiquitous location awareness, where the use of
several RTLS (Real Time Location System) combinations is
feasible, may benefit from this information to discriminate
between GPS and other available localization data. A quality
indicating parameter is readily available in GPS-data; the DOP
(Dilution Of Precision) data field, which indicates the accuracy
of the GPS localization based on the current satellite geometry.
However since in indoor environments the roof and possible
overlying floors often cause more signal attenuation compared
to (outer) walls or windows, the probability of a better
reception of 'low' orbiting satellite signals increases, giving rise
to an unjustified good horizontal DOP value. Standard NMEA-
0183 GPS strings are therefore analyzed in search of other
indicators for malicious GPS-data.
ISSN: 1582-7445
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Technologiecluster ESAT Elektrotechnische Engineering
Electrical Engineering (ESAT) TC, Technology Campuses Ghent and Aalst
× corresponding author
# (joint) last author

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