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toni
2020-01-16 13:07:26 +01:00
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tex/chapters/1_introduction.tex
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\section{Introduction}
\label{sec:intro}
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Many indoor positing system (IPS) rely on radio technologies for estimating a pedestrian's position inside a building \cite{Ebner-15}. Probably the most widespread approaches are those based on Received Signal Strength Indication (RSSI) provided by Wi-Fi, as many buildings nowadays offer good infrastructure and as the be located receiver, standard smartphones can be used. These two features make Wi-Fi particularly interesting for the commercial consumer market, e.g. navigating inside an airport or shopping mall.
Many indoor positioning system (IPS) rely on radio technologies for estimating a pedestrian's position inside a building \cite{Ebner-15}. Probably the most widespread approaches are those based on Received Signal Strength Indication (RSSI) provided by Wi-Fi, as many buildings nowadays offer good infrastructure and as the be located receiver, standard smartphones can be used. These two features make Wi-Fi particularly interesting for the commercial consumer market, e.g. navigating inside an airport or shopping mall.
%Probleme von RSSI
By measuring the RSSI emitted from Wi-Fi access points (AP) at known locations, the receiver and thus the pedestrian is able to get its current position using the principles of multilateration.