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Douglas W Friedrich

Researcher at Caterpillar Inc.

Publications -  16
Citations -  1213

Douglas W Friedrich is an academic researcher from Caterpillar Inc.. The author has contributed to research in topics: Position (vector) & Global Positioning System. The author has an hindex of 7, co-authored 16 publications receiving 1213 citations.

Papers
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Patent

Vehicle position determination system and method

TL;DR: In this article, the first and second position estimates are combined and filtered using novel techniques to derive a more accurate third position estimate of the vehicle's position, which can be used for autonomous navigation.
Patent

Method and apparatus for determining vehicle position using a satellite based navigation system

TL;DR: In this paper, an apparatus and method for determining the position of a vehicle relative to the center of the Earth using navigation signals from a satellite-based navigation system which includes a plurality of satellites orbiting the Earth is presented.
Patent

System and method for providing accurate vehicle positioning using spatial bias techniques

TL;DR: In this article, a vehicle position determination system and method provide accurate vehicle positioning using a global positioning system using Spatial bias techniques are used to improve positioning accuracy while the vehicle is in the midst of a relatively linear path and is not approaching a drastically nonlinear path.
Patent

System and method for using parabolic models to improve position estimates from a global positioning system

TL;DR: In this paper, the first and second position estimates are combined and filtered using novel techniques to derive a more accurate third position estimate of the vehicle's position, which can be used for autonomous navigation.