Processing of satellite positioning system signals
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United States of America Patent
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May 22, 2012
Grant Date -
Sep 16, 2010
app pub date -
Oct 16, 2008
filing date -
Oct 19, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
The invention provides a method of processing signals from a satellite positioning system in which a user inputs an approximate indication of current position, and this is used when processing satellite samples to reduce the processing required or increase the reliability. This approach avoids the need for an automated approximate location system (for example using cellular telephony). This represents a change in the way GPS (or other satellite systems) is used. Instead of relying on a GPS system to provide a location in entirely automated manner, the approach is for the user to give an approximate location (which will generally be known), and for the GPS system then to correct this and provide an accurate location. This approach can enable the GPS system to function in areas where it would normally be unreliable.
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