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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50061

Title: Optimisation and sensitivity analysis of GPS receiver tracking loops in dynamic environments
Authors: Dah-Jing Jwo
Contributors: 國立臺灣海洋大學:通訊與導航工程學系
Keywords: optimisation
sensitivity analysis
tracking filters
Kalman filters
Global Positioning System
radio receivers
covariance analysis
error analysis
Date: 2001-08
Issue Date: 2018-09-14T01:51:14Z
Publisher: IEE Proceedings – Radar, Sonar and Navigation
Abstract: Abstract: For a GPS receiver, decreasing the receiver tracking loop bandwidth reduces the probability of loss of lock if there are no vehicle dynamics. However, reduced bandwidth increases tracking errors due to dynamics. Beyond a certain limit it causes a serious degradation in the dynamic tracking performance. Therefore, there is involvement of a tradeoff between two opposing considerations: narrow tracking loop bandwidths are desired for filtering noise due to thermal effects, but wide tracking loop bandwidths are desired to permit tracking of vehicle dynamics. Optimal tracking loop bandwidths, which yield the minimum errors in a certain dynamics environment, are first investigated. The linear Kalman filter is employed as the optimal estimator. The covariance for the arbitrary gain model is solved and applied to the sensitivity analysis for investigating error growth due to incorrect noise level estimates. Theoretical results are verified by numerical simulation, and results from both approaches are in very good agreement.
Relation: 148(4) pp.241-250
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50061
Appears in Collections:[通訊與導航工程學系] 期刊論文

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