“Where I am?” is the typical question asked by a person when visiting a new city or unknown place. Knowing one’s own location is generally a basic necessity for people, both in indoors and outdoors. Nowadays, thanks to new technologies, this position information is available in almost every moment and almost everywhere. For example, with a smartphone we can compute our position using the sensors available on the device that may include small inertial measurement units (IMUs), proximity sensors, barometer, and GPS/GNSS. GNSS is the most used because, in combination with a smartphone, it enables users to plan and carry out their activities, e.g., to calculate routes (used as a navigation system), to share their location on social networks, or to geolocalise images. But how accurate is the position provided by these sensors? And what accuracy can be achieved by GNSS-enabled smartphones? In outdoor scenarios, smartphone technology allows us to position ourselves with a good level of precision, thanks to the use of assisted GPS (A-GPS), radio-frequency positioning, and mapping. Despite that, in some cases the received GPS/GNSS signal is too noisy or not available at all (e.g., in urban canyons, inside buildings), and GNSS positioning is not possible. Because of this, many research groups are exploring prospective solutions that combine various kinds of sensors (GPS, INS, images, and so forth) and technologies (e.g., Wi-Fi, pedestrian tracking system, Bluetooth) in order to improve position accuracy and availability. However, this article focuses attention on GNSS-only positioning with smartphones, considering outdoor and urban canyon scenarios to give an overview of the precisions and accuracies available today.

What are the actual performances of GNSS positioning using smartphone technology? / Dabove, Paolo. - In: INSIDE GNSS. - ISSN 1559-503X. - STAMPA. - 9:6(2014), pp. 34-37.

What are the actual performances of GNSS positioning using smartphone technology?

DABOVE, PAOLO
2014

Abstract

“Where I am?” is the typical question asked by a person when visiting a new city or unknown place. Knowing one’s own location is generally a basic necessity for people, both in indoors and outdoors. Nowadays, thanks to new technologies, this position information is available in almost every moment and almost everywhere. For example, with a smartphone we can compute our position using the sensors available on the device that may include small inertial measurement units (IMUs), proximity sensors, barometer, and GPS/GNSS. GNSS is the most used because, in combination with a smartphone, it enables users to plan and carry out their activities, e.g., to calculate routes (used as a navigation system), to share their location on social networks, or to geolocalise images. But how accurate is the position provided by these sensors? And what accuracy can be achieved by GNSS-enabled smartphones? In outdoor scenarios, smartphone technology allows us to position ourselves with a good level of precision, thanks to the use of assisted GPS (A-GPS), radio-frequency positioning, and mapping. Despite that, in some cases the received GPS/GNSS signal is too noisy or not available at all (e.g., in urban canyons, inside buildings), and GNSS positioning is not possible. Because of this, many research groups are exploring prospective solutions that combine various kinds of sensors (GPS, INS, images, and so forth) and technologies (e.g., Wi-Fi, pedestrian tracking system, Bluetooth) in order to improve position accuracy and availability. However, this article focuses attention on GNSS-only positioning with smartphones, considering outdoor and urban canyon scenarios to give an overview of the precisions and accuracies available today.
2014
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2578139
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