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http://dx.doi.org/10.6109/jkiice.2014.18.11.2745

A Performance Improvement on Navigation Applying Measurement Estimation in Urban Weak Signal Environment  

Park, Sul Gee (Maritime Safety Research Division, Korea Research Institute of Ships & Ocean Engineering)
Cho, Deuk Jae (Maritime Safety Research Division, Korea Research Institute of Ships & Ocean Engineering)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.18, no.11, 2014 , pp. 2745-2752 More about this Journal
Abstract
In recent years, Transport Demand Management has been conducted for the efficient management of transport. In ITS applications in particular, the prerequisite is accurate and reliable positioning. However, the major problems are satellite signal outage, and multipath. This paper proposes that outage and multipath measurement can be detected and estimated using elevation angle and signal to noise ratio data association relation in stand-alone GPS. In order to verify the performance of the proposed method, it is then evaluated by the car test. the evaluation test environment has low accuracy and unreliable positioning because of signal outage or multipath such as steep hill and high buildings. In the evaluation test result, 918times abnormal signal occurred and it was confirmed that the proposed method showed more improved 9.48m(RMS) horizontal positioning error than without proposed method.
Keywords
Multipath error elimination; Urban vehicle test; Stand-alone positioning; Signal outage; Weak signal;
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