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System and method for compensating for faulty measurements

An error and receiving system technology, applied in radio wave measurement systems, measurement devices, satellite radio beacon positioning systems, etc., can solve problems such as measurement errors

Active Publication Date: 2015-06-03
NAVCOM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Although the ability to process one measurement at a time is a unique processing advantage for Kalman filters, it poses a problem: the last measurement update with respect to the state vector is not available until all measurements in the measurement epoch have been processed measurement error
Therefore, reprocessing the entire measurement epoch to remove erroneous measurements is not a practical solution

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  • System and method for compensating for faulty measurements

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Embodiment Construction

[0045] Some embodiments provide a system, a computer-readable storage medium including instructions, and a computer-implemented method for compensating for erroneous satellite navigation measurements for a plurality of global navigation satellites by reprocessing only those measurements determined to be erroneous measurements. The calculated state of , and the effect on the corresponding covariance matrix for the states of the plurality of global navigation satellites. Some embodiments provide a system, a computer-readable storage medium including instructions, and a computer-implemented method for compensating for erroneous satellite navigation measurements to a satellite navigation receiver by reprocessing only those measurements determined to be erroneous measurements. Calculated states and effects on the corresponding covariance matrix for the states of the satnav receiver. These embodiments reduce unnecessary processing required by the brute force algorithm techniques des...

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Abstract

A system and method for compensating for faulty satellite navigation measurements. A plurality of measurements in a system is received for a measurement epoch. A Kalman filter is used to calculate a state of the system for the measurement epoch based on the plurality of measurements, wherein the state of the system for the measurement epoch is calculated using a first closed-form update equation. A faulty measurement is detected in the plurality of measurements for the measurement epoch and a revised state of the system for the measurement epoch that compensates for the faulty measurement is calculated, using the calculated state of the system for the measurement epoch as an input to the revised state calculation, and using a revised closed-form update equation comprising the first closed-form update equation modified with respect to the faulty measurement.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application claims priority to US Provisional Application 61 / 252,104, filed October 15, 2009, and entitled "Systems and Methods for Compensating for Erroneous Satellite Navigation Measurements," which is incorporated herein by reference in its entirety . technical field [0003] The disclosed embodiments generally relate to compensating for erroneous measurements. Background technique [0004] Kalman filters can be used to solve static and dynamic parameters in dynamic systems with noisy measurements. One such system is the Global Navigation Satellite System (GNSS), in which satellite navigation measurements are affected by multiple sources of noise (eg, multipath effects, ionospheric effects, tropospheric effects, etc.). There are two main motivations in using a Kalman filter to solve for these static and dynamic parameters (often referred to as state vectors) through measurements as a function of them. First, ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/00
CPCG01S19/20G01S19/40
Inventor R·R·黑奇L·L·戴
Owner NAVCOM TECH