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Surface vehicle vertical trajectory planning

  • US 9,417,075 B2
  • Filed: 11/17/2014
  • Issued: 08/16/2016
  • Est. Priority Date: 03/27/2000
  • Status: Expired due to Fees
First Claim
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1. A method for improving accuracy of vehicle position determination, comprising:

  • determining an initial vehicle position estimate based on GPS data,recording a sequence of sensor data from a sensor located with the vehicle, andrefining the initial vehicle position estimate by performing pattern matching with a pattern matching system that looks for the presence of a known sequence of data in the recorded sequence of sensor datawherein the pattern matching system multiplies a sequence consisting of n numbers obtained from the known sequence of data by a corresponding sequence of n numbers obtained from the recorded sequence of sensor data, sums the results of the n multiplications, and determines when the sequences match by identifying when the sum of the n multiplications has a peak.

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