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Evaluation and testing of technologies for indoor positioning

Helander, Fredrik LU and Engström, Hampus (2015) EITM01 20151
Department of Electrical and Information Technology
Popular Abstract
Indoor positioning based on magnetic field fingerprints

Indoor positioning, one of today’s technical challenges. How
can it be solved when there is no standard solution? One approach
is by discretizing earth’s magnetic field and use it as fingerprints.
Today there is a standard technology called global positioning
system, GPS. This is a system that is commonly used to position
smartphones outdoors. Unfortunately, GPS is not reliable indoors as it
requires satellite connection. Indoor positioning is a problem today as
there exists no standardized solution. However, there exists some
technologies that can be used to perform indoor positioning. The
problem with these are that they were not created for the purpose of
locating... (More)
Indoor positioning based on magnetic field fingerprints

Indoor positioning, one of today’s technical challenges. How
can it be solved when there is no standard solution? One approach
is by discretizing earth’s magnetic field and use it as fingerprints.
Today there is a standard technology called global positioning
system, GPS. This is a system that is commonly used to position
smartphones outdoors. Unfortunately, GPS is not reliable indoors as it
requires satellite connection. Indoor positioning is a problem today as
there exists no standardized solution. However, there exists some
technologies that can be used to perform indoor positioning. The
problem with these are that they were not created for the purpose of
locating devices, which makes the task a bit trickier. But it can be done,
just like the situation with the GPS.
An increasing number of devices are connected and designed to
communicate with each other. Concepts such as Internet of Things
might benefit from indoor positioning in the future at the same time
widespread use of smartphones, tablets and other mobile
communication devices location based applications are becoming
increasingly popular.
When trying to develop an indoor positioning system, there are
several problems to tackle. The first problem to encounter is the main
one, how can a device be positioned? As mentioned earlier there exists
no standard technique solving this problem today. Companies have
been trying to produce their own solutions for years, trying to create a
product that is marketable. Therefore analyzing the market is a good
start, trying to avoid what has already been classified as dead-ends.
There are several methods that can be used to estimate the position
of a smartphone. These methods often rely on already existing
technologies such as Wi-Fi, Bluetooth as well as different smartphone
sensors. A popular choice these days is to combine technologies in a
fusion solution to achieve better precision.
Then there is another problem, how stable is the data? Smartphone
sensors drifts, Wi-Fi and Bluetooth signals tend to be interfered due to
the choice of a popular bandwidth, or the signal strength decreases
when it propagates through walls. Don’t worry though, these problems
can be diminished using smart filters and algorithms.
We developed an android application which uses magnetic field
strength data together with Bluetooth data to position itself. The
application achieves fairly good accuracy and the developed solution
can be installed quick and easy in most indoor environments. (Less)
Please use this url to cite or link to this publication:
author
Helander, Fredrik LU and Engström, Hampus
supervisor
organization
course
EITM01 20151
year
type
H2 - Master's Degree (Two Years)
subject
language
English
id
8195114
date added to LUP
2015-11-20 09:28:25
date last changed
2015-11-20 09:28:25
@misc{8195114,
  author       = {Helander, Fredrik and Engström, Hampus},
  language     = {eng},
  note         = {Student Paper},
  title        = {Evaluation and testing of technologies for indoor positioning},
  year         = {2015},
}