Indoor Positioning in the WLAN Environment with Sensitive Analysis of Environmental Interference
Date Issued
2009
Date
2009
Author(s)
Sung, Yun-Chiao
Abstract
In past decade, positioning-based service has become a crucial researching field in many location-aware applications. As the invention of GPS technology, positioning in outdoor receives quite an acceptable performance, but poor in indoor cause of blocking signal from the GPS satellite inside the building. Many technologies have been applied as the solution in indoor environment. WLAN-based system becomes the dominated researching direction in indoor positioning for the reason of wide availability and ubiquitous coverage in large environments. However, in indoor environment, there exists a lot of unpredicted environmental interference, which make the indoor positioning more difficult and decrease the positioning accuracy.n this work, we establish a basic indoor WLAN positioning system, and focus on the problem of new environmental interference occurring in our target environment. We propose an interference-recognition and revision scheme with help of proposed radio-map sections and user tracking record for reducing the influence of environmental interference. From plenty of experiments, we demonstrate the effectiveness of our proposed scheme and improve the positioning accuracy in complex indoor environment.
Subjects
WLAN-based positioning
Environmental Interference
Interference Recognition
Interference Revision
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