USE OF ACCELEROMETER ONLY DATA TO IMPROVE GNSS PERFORMANCE
First Claim
1. A method of accelerometer assisted satellite navigation, comprising:
- detecting a stationary condition of an accelerometer set;
gross-calibrating said accelerometer set when in said stationary condition, wherein gross-calibrating includes determining a combined-bias of said accelerometer set;
defining at least two acceleration levels using said combined-bias;
collecting accelerometer data;
categorizing said accelerometer data into one of said at least two acceleration levels; and
utilizing the categorized accelerometer data to enhance satellite navigation.
2 Assignments
0 Petitions
Accused Products
Abstract
The present invention provides apparatus and methods for improving satellite navigation by assessing the dynamic state of a platform for a satellite navigation receiver and using this data to improve navigation models and satellite tracking algorithms. The dynamic state of the receiver platform may be assessed using only accelerometer data, and does not require inertial navigation system integration. The accelerometers may not need to be very accurate and may not need to be aligned and/or accurately calibrated. A method of accelerometer assisted satellite navigation may comprise: detecting a stationary condition of an accelerometer set; gross-calibrating the accelerometer set when in the stationary condition, wherein gross-calibrating includes determining a combined-bias of the accelerometer set; defining at least two acceleration levels using the combined-bias; collecting accelerometer data; categorizing the accelerometer data into one of the acceleration levels; and utilizing the categorized accelerometer data to enhance satellite navigation.
-
Citations
20 Claims
-
1. A method of accelerometer assisted satellite navigation, comprising:
-
detecting a stationary condition of an accelerometer set; gross-calibrating said accelerometer set when in said stationary condition, wherein gross-calibrating includes determining a combined-bias of said accelerometer set; defining at least two acceleration levels using said combined-bias; collecting accelerometer data; categorizing said accelerometer data into one of said at least two acceleration levels; and utilizing the categorized accelerometer data to enhance satellite navigation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A system for accelerometer assisted satellite navigation, said system comprising:
-
an accelerometer set for generating accelerometer data; a stationary condition detection module, for detecting a stationary condition of said accelerometer set from said accelerometer data; a gross-calibration module for providing a combined-bias of said accelerometer set from accelerometer data collected when said stationary condition of said accelerometer set is detected; an acceleration level definition module for defining at least two acceleration levels using said combined-bias of said accelerometer set; and an accelerometer data categorization module for categorizing said accelerometer data by acceleration level. - View Dependent Claims (19, 20)
-
Specification