GNSS performance enhancement using accelerometer-only data
First Claim
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1. A method of accelerometer assisted satellite navigation, comprising:
- collecting accelerometer data;
categorizing said accelerometer data into one of at least two acceleration levels depending on a magnitude of said accelerometer data, wherein a first acceleration level corresponds to a range of acceleration magnitudes that are higher than a range of acceleration magnitudes corresponding to a second acceleration level; and
utilizing the categorized accelerometer data to enhance satellite navigation based on received satellite signals, wherein when said accelerometer data is categorized as said first acceleration level, a first condition for performing satellite navigation based on received satellite signals is used, and wherein when said accelerometer data is categorized as said second acceleration level, a second condition different than said first condition is used for performing satellite navigation based on received satellite signals.
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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.
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Citations
21 Claims
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1. A method of accelerometer assisted satellite navigation, comprising:
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collecting accelerometer data; categorizing said accelerometer data into one of at least two acceleration levels depending on a magnitude of said accelerometer data, wherein a first acceleration level corresponds to a range of acceleration magnitudes that are higher than a range of acceleration magnitudes corresponding to a second acceleration level; and utilizing the categorized accelerometer data to enhance satellite navigation based on received satellite signals, wherein when said accelerometer data is categorized as said first acceleration level, a first condition for performing satellite navigation based on received satellite signals is used, and wherein when said accelerometer data is categorized as said second acceleration level, a second condition different than said first condition is used for performing satellite navigation based on received satellite signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A system for accelerometer assisted satellite navigation, said system comprising:
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an accelerometer set for generating accelerometer data; and an accelerometer data categorization module for categorizing said accelerometer data by acceleration level depending on a magnitude of said accelerometer data, wherein a first acceleration level corresponds to a range of acceleration magnitudes that are higher than a range of acceleration magnitudes corresponding to a second acceleration level; and a navigation processor for providing navigation solutions, wherein said navigation processor is configured to utilize categorized accelerometer data from the accelerometer data categorization module for enhancing navigation solutions based on received satellite signals, and wherein when said accelerometer data is categorized as said first acceleration level, said navigation processor uses a first condition for performing satellite navigation based on received satellite signals, and wherein when said accelerometer data is categorized as said second acceleration level, said navigation processor uses a second condition different than said first condition for performing satellite navigation based on received satellite signals. - View Dependent Claims (20, 21)
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Specification