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Performance Analysis of Velocity Estimation with BDS

Published online by Cambridge University Press:  01 February 2017

Shirong Ye ,
Yongwei Yan  and
Dezhong Chen
Shirong Ye
Affiliation:
(GNSS Research Center, Wuhan University, Wuhan, China)
Yongwei Yan
Affiliation:
(GNSS Research Center, Wuhan University, Wuhan, China)
Dezhong Chen*
Affiliation:
(GNSS Research Center, Wuhan University, Wuhan, China)
*
(E-mail: chendz@whu.edu.cn)
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Abstract

The regional part of the current BeiDou navigation satellite system (BDS) consists of five Geostationary Earth Orbit (GEO) satellites, five Inclined Geosynchronous Satellite Orbit (IGSO) satellites and four Medium Earth Orbit (MEO) satellites. We examined three algorithms for BDS velocity estimation. In addition, the performance of velocity estimation using different BDS satellite combinations was analysed. Static tests demonstrated that velocity precision using Raw Doppler (RD) measurements was of the order of centimetres per second, whereas the carrier-phase-Derived Doppler (DD) measurements and Time-Differenced Carrier Phase (TDCP) method provided accuracies of the order of millimetres per second. Because of the irregularity of the satellites' distribution, three peaks exist on the north component in the 24-hour velocity series. Besides, the GEO satellites contribute significantly in velocity estimation and the satellites' geometry condition seriously declined when excluding GEO satellites. In kinematic tests, the root mean square of the velocity error derived by DD and TDCP both attained the centimetre per second level. Moreover, the precision of velocity determination with these three methods was degraded by the sudden acceleration of the vehicle.

Keywords

BDSVelocity EstimationRDDDTDCP
Type
Research Article
Information
The Journal of Navigation , Volume 70 , Issue 3 , May 2017 , pp. 580 - 594
Copyright
Copyright © The Royal Institute of Navigation 2017 

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