The GETA Sandals: A Footprint Location Tracking System
Date Issued
2005
Date
2005
Author(s)
Okuda, Kenji
Yeh, Shun-Yuan
Wu, Chon-In
Chang, Keng-Hao
Chu, Hao-Hua
DOI
20060927122838710811
Abstract
This paper presents the design, implementation, and evaluation of a
footprint-based indoor location system on traditional Japanese GETA sandals.
Our footprint location system can significantly reduce the amount of infrastruc-ture
required in the deployed environment. In its simplest form, a user simply
has to put on the GETA sandals to track his/her locations without any setup or
calibration efforts. This makes our footprint method easy for everywhere de-ployment.
The footprint location system is based on the dead-reckoning method.
It works by measuring and tracking the displacement vectors along a trial of
footprints (each displacement vector is formed by drawing a line between each
pair of footprints). The position of a user can be calculated by summing up the
current and all previous displacement vectors. Additional benefits of the foot-print
based method are that it does not have problems found in existing indoor
location systems, such as obstacles, multi-path effects, signal noises, signal in-terferences,
and dead spots. However, the footprint based method has a prob-lem
of accumulative error over distance traveled. To address this issue, it is
combined with a light RFID infrastructure to correct its positioning error over
some long distance traveled.
Publisher
臺北市:國立臺灣大學資訊工程學系
Type
other
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