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http://dx.doi.org/10.12673/jant.2017.21.1.138

Improving INS/GPS Integrated System Position Error using Dilution of Precision  

Kim, Hyun-seok (Agency for Defense Development)
Baek, Seung-jun (Agency for Defense Development)
Cho, Yun-cheol (Agency for Defense Development)
Publication Information
Journal of Advanced Navigation Technology / v.21, no.1, 2017 , pp. 138-144 More about this Journal
Abstract
A method for improving the integrated navigation performance in the INS/GPS navigation system by the considering that the condition that the geometric arrangement of the satellite is degraded due to limitation of the line of sight of the satellite such as geographic feature and GPS signal jamming is proposed. A variable covariance extended Kalman filter (VCEKF) that correlated to the measured covariance to the DOP of GPS is suggested. The navigation performance of integrated navigation system using EKF and VCEKF is analyzed by Monte-Carlo simulations. The result is verified that VCEKF has better estimation performance than EKF using fixed covariance on condition that DOP value is larger than the smaller value.
Keywords
Dilution of precision; Inertial navigation system / global positioning system Integrated System; Variable covariance extended Kalman filter;
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