| Summary: | Localization systems will evolve towards autonomous system
which will use any useful information provided by mobile devices taking
the hardware specification and environmental limitations into account.
This paper demonstrates the concept of opportunistic localization using
a smart phone with the following sensor technologies:Wi-Fi, GSM, GPS
and two embedded accelerometers. A particle filter based estimator with
an adaptive motion model is used to seamlessly fuse the different sensory
readings. Real experiments in multi-floor, indoor-outdoor environments
were conducted to analyze the performance of the proposed system. The
achieved results using various sensor combinations are presented.
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