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• W2213164033 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 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)" @default.
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• W2213164033 date "2015-01-01" @default.
• W2213164033 modified "2023-09-27" @default.
• W2213164033 title "Evaluation and testing of technologies for indoor positioning" @default.
• W2213164033 hasPublicationYear "2015" @default.
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