Low-complexity tightly-coupled integration filter for step detection in a sensor-assisted GNSS receiver
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United States of America Patent
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Feb 4, 2014
Grant Date -
May 23, 2013
app pub date -
Jan 18, 2013
filing date -
Sep 24, 2008
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Abstract
Embodiments of the invention provide a step detection. An accelerometer measurement in the form of a multi-dimensional acceleration vector is obtained. The magnitude of the accelerometer measurement is filtered using a low pass filter. A threshold for a down-crossing is provided as is a threshold for an up-crossing. A step detection is triggered if the magnitude of the accelerometer measurement is greater than or equal to the threshold for an up-crossing.
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