Satellite based on-board vehicle navigation system including predictive filtering and map-matching to reduce errors in a vehicular position
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United States of America Patent
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Sep 2, 2003
Grant Date -
Nov 28, 2002
app pub date -
May 24, 2001
filing date -
May 24, 2001
priority date (Note) -
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Abstract
An accurate position of a mobile receiver is determined using a received positional signal having relatively low and high frequency noise components corrupting the positional accuracy of the positional signal. A low frequency error associated with a detected turn of the mobile receiver is derived and applied as a low frequency correction factor to positions of the receiver derived after the turn is detected. Resulting corrected positions are applied along with associated high frequency correction factors representative of the high frequency noise component to a predictive filter to derive predicted positions substantially free of the low and high frequency noise components.
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