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FrankE
2016-07-11 12:18:00 +02:00
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competition/tex/chapters/stepturn.tex
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\subsection{Step- and Turn-Detection}
used for the transition step
uses the smartphone's imu (acc, gyro)
simple step detection using magnitudes
simple turn detection by integrating over the gyro
feeds the transition
The smartphone's IMU is used to track the number of steps the pedestrian has made
(accelerometer) as well as the relative heading change (gyroscope) since the last transition
\cite{ebner-15}.%
%
To avoid potential sample impoverishment, which is induced when using the state transition as proposal distribution,
we use both values directly within the transition step to constrain the to-be-walked distance and direction for the
random walk.