A technique which smartphones use to improve GPS precision and speed is called AGPS.docx - A technique which smartphones use to improve GPS precision

A technique which smartphones use to improve GPS precision and speed is called AGPS.docx

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A technique which smartphones use to improve GPS precision and speed is called AGPS, or assisted GPS. When a GPS system is first used/turned on, it needs to find clock and orbit data for the satellites it is going to link to. This then results in what is known as TTFF or Time to First Fix which signifies how long it takes for the GPS receiver to acquire its exact location. Assisted GPS circumvents this problematic by using data from the cellular towers on the phone’s network in combination with the phone’s own GPS data to acquire location fix. The time taken to acquire a solution using AGPS is usually much faster as the cellular towers which the phone is communicated data from, are constantly getting GPS data from satellites and calculating the data, this then helps the GPS receiver on the perform tasks such as range capacities and place solutions much faster. 5.1.3. Indoor Positioning QR Codes One of the major difficulties to overcome when emerging an app like Plotting UL campus is how to determine a user’s position when they are indoors/under cloud exposure. Although Assisted GPS somewhat alleviates this, GPS triangulation is still unclear at best within buildings so a system must be created to overcome that. QR codes would be an ideal way with which to avoid this problem. Inside every building and floor within the UL Campus there
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  • Fall '16
  • Google Maps, Nexus One, Windows Mobile

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