4 research outputs found
{WiFi GPS} based Combined positioning Algorithm
International audienceIf nowadays, positioning becomes more and more accurate, and covers better and better a territory (indoor and outdoor), it remains territories where traditional (and basic) positioning system (GPS, gsm or WiFi) and hybrid ones (GPS-gsm, GPS-WiFi, GPS-WiFi-gsm,...) are insufficient and requires research investment treating combined positioning. In this paper we propose a GPS-WiFi combined positioning algorithm, based on trilateration technique. Real experiments and other simulation are conduced and demonstrate accuracy gains, even where various criteria dilution of precision (GPS dop s criteria, or ours WiFi geometrical and signal attenuation s dop proposal, or hybrid dop one s) indicate all the disruption of positioning service. A testbed scenario issued from a real urban campus environment validates not only our GPS-WiFi combined positioning algorithm but also an implementation of pertinent positioning techniques and dop s criteria. This work constitutes ?a further ?step to better position everywhere and to ensure continuity of a positioning service
Geometric and Signal Strength Dilution of Precision (DoP)Wi-Fi
The democratization of wireless networks combined to the emergence of mobile
devices increasingly autonomous and efficient lead to new services. Positioning
services become overcrowded. Accuracy is the main quality criteria in
positioning. But to better appreciate this one a coefficient is needed. In this
paper we present Geometric and Signal Strength Dilution of Precision (DOP) for
positioning systems based on Wi-Fi and Signal Strength measurements.Comment: International Journal of Computer Science Issues (IJCSI), Volume 3,
pp35-44, August 200