Velocity estimations by combining time-differenced GPS and Doppler observations

doi:10.1088/1361-6501/ab375f

NTSC-IR

	Velocity estimations by combining time-differenced GPS and Doppler observations
	Wang,Xingxing 1,3; Tu,Rui 1,2,3; Gao,Yaping 4; Zhang,Rui 1,2; Fan,Lihong 1,2; Zhang,Pengfei 1,3; Han,Junqiang 1,2; Lu,Xiaochun 1,2,3
	2019-09-16
发表期刊	Measurement Science and Technology
ISSN	0957-0233
卷号	30 期号:12
摘要	Abstract Time-differenced carrier phase velocity estimations (TDCPVE) and Doppler velocity estimations (DVE) are two commonly used methods for precise velocity estimation with a stand-alone GPS receiver. As TDCPVE require a minimum of four satellites for parameter estimation, the time-differenced velocity estimation (TDVE) model was developed by combining the TDCPVE model and time-differenced pseudo-range velocity estimation model. A limitation of the TDVE is that it can show reduced solution availability, particularly during harsh conditions. DVE model theory is stricter than that of the TDVE model, which yields more reliability when vehicle maneuverability is strong. However, its accuracy is low due to the low precision of Doppler observations. Nevertheless, the advantages and disadvantages of the TDVE and DVE are complementary. This study presents a TD–DVE method by combining the two models. This method can achieve improved performance by fully using all useful information contained in the GPS and Doppler observations. Static and dynamic data were used to verify and analyze the performance of the TD–DVE. The results show that the accuracy of the TD–DVE was improved compared with the DVE. Compared with the TDVE method, TD–DVE has a much higher solution rate at poor observation conditions and improved accuracy during changing vehicle dynamic conditions. Overall, the TD–DVE model enhances the robustness of the individual velocity estimation methods and improves usability.
关键词	velocity estimation Doppler observation GNSS time-differencing
DOI	10.1088/1361-6501/ab375f
语种	英语
WOS记录号	IOP:0957-0233-30-12-ab375f
出版者	IOP Publishing
引用统计
文献类型	期刊论文
条目标识符	http://210.72.145.45/handle/361003/10763
专题	中国科学院国家授时中心
作者单位	1.National Time Service Center, Chinese Academy of Sciences, Shu Yuan Road, Xi’an 710600, People’s Republic of China 2.Key Laboratory of Time and Frequency Primary Standards, Chinese Academy of Sciences, Xi’an 710600, People’s Republic of China 3.University of Chinese Academy of Sciences, Yu Quan Road, Beijing 100049, People’s Republic of China 4.Chengdu University of Technology, Dong San Road of Er Xian Qiao, Cheng du 610059, People’s Republic of China
推荐引用方式 GB/T 7714	Wang,Xingxing,Tu,Rui,Gao,Yaping,et al. Velocity estimations by combining time-differenced GPS and Doppler observations[J]. Measurement Science and Technology,2019,30(12).
APA	Wang,Xingxing.,Tu,Rui.,Gao,Yaping.,Zhang,Rui.,Fan,Lihong.,...&Lu,Xiaochun.(2019).Velocity estimations by combining time-differenced GPS and Doppler observations.Measurement Science and Technology,30(12).
MLA	Wang,Xingxing,et al."Velocity estimations by combining time-differenced GPS and Doppler observations".Measurement Science and Technology 30.12(2019).