Clock-aided satellite navigation receiver system for enhanced po

Details Clock-aided satellite navigation receiver system for enhanced po Clock-aided satellite navigation receiver system for enhanced po

1995-01-24

1997-04-22

Chin, Gary

Boots, shoes, and leggings

342357, 342358, 3644497, H04B 7185, G06F 1900

Patent

active

056234147

ABSTRACT:
A satellite navigation receiver system for determining an accurate three dimensional position estimate of a movable object and initiating correction of the location of the movable object in response to the three dimensional estimate, utilizing a receiver for receiving range measurement signals from a satellite navigation system, a clock having a constant frequency drift rate for at least a predetermined period of time, and a processing scheme capable of computing clock bias estimates over a predetermined period of time including an instantaneous time, using the clock bias estimates in a quadratic function to adaptively derive a smoothed clock bias estimates over the predetermined period of time including the instantaneous time, computing a three dimensional position estimate of the movable object's position using the smoothed clock bias estimate at the instantaneous time, and determining if the three dimensional position estimates are of sufficient quality for a user's intended purpose, whereby depending on the computed three dimensional position estimates, alone or in conjunction with the determination as to whether such estimates are of sufficient quality, the movable object is moved in response thereto.

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