Results 31 to 40 of about 1,168 (189)
Space Weather, Volume 20, Issue 11, November 2022., 2022 Abstract The impacts of ionospheric irregularities on precise point positioning (PPP) have been commonly noticed in the field of the ionosphere and the precise application of the Global Navigation Satellite System. But few attentions have been paid to how ionospheric irregularities deteriorate the performance of PPP.
Wei Li +4 more
wiley +1 more source
Base Station Selection for Hybrid TDOA/RTT/DOA Positioning in Mixed LOS/NLOS Environment
Sensors, 2020 The fifth generation (5G) cellular communication system is designed to support Time Difference of Arrival (TDOA), Round-Trip Time (RTT), and Direction of Arrival (DOA) measurements for indoor positioning.
Zhongliang Deng +3 more
doaj +1 more source
Mobile Information Systems, Volume 2022, Issue 1, 2022., 2022 This article designs and implements a 3D moving target positioning and tracking system by using ultrawideband (UWB) technology. The result of the two‐way ranging by the time difference of arrival (TWR‐TDOA) positioning algorithm is adopted to result in a new resolution that is to resolve the hyperbolic equations.
Yanping Zhu +6 more
wiley +1 more source
IET Wireless Sensor Systems, 2020 In wireless localization systems, the performance enhancement of location estimation is an important goal. In recent years, different positioning systems using an ultra ‐ wide band (UWB) technology have been created, and always an evaluation metric to ...
Abbas Albaidhani, Ahlam Alsudani
semanticscholar +1 more source
A Weighted Geometric Dilution of Precision-Based Method for Indoor Positioning System
Journal of Communications, 2020 The weaknesses of ranging techniques on using RSS in indoor localization are fluctuating the RSS values. This situation will affect to the accuracy of distance measurement between anchor and target node.
A. D. Ramadhani +2 more
semanticscholar +1 more source
On-board BDS dynamic filtering ballistic determination and precision evaluation
Open Astronomy, 2022 BeiDou navigation satellite system (BDS) receivers on-board cannot give real-time positioning precision in tracking missile and carrier rocket. In this article, the dynamic filtered optimal estimation theory is applied to the highly dynamic on-board BDS ...
Zhao Shu-Qiang, Chang Jia-Yu
doaj +1 more source
, 2021 —Complementary solutions to the Medium Earth Orbit (MEO) Global Navigation Satellite Systems (GNSS) are more and more in demand to be able to achieve seamless positioning worldwide, in outdoor as well as in indoor scenarios, and to cope with increased ...
Lohan, Elena-Simona +2 more
core +1 more source
Sensors, 2020 The Long Range Navigation (Loran) system as a backup of the Global Navigation Satellite System (GNSS) is a good choice. The dominant deterioration factors of position accuracy are the pseudo-range measurement errors and the geometric dilution of ...
Baorong Yan, Yun Li, Wei Guo, Yu Hua
doaj +1 more source
A geometric dilution of precision based 3D indoor positioning scheme
上海师范大学学报. 自然科学版, 2017 A geometric dilution of precision(GDOP) based 3D indoor positioning scheme was proposed for the layout of anchor nodes.Through the proposed scheme,the biconical configuration could be obtained.The performance of the scheme was evaluated by utilizing two ...
Yang Ming, Liu Zhongling, Yu Hui
doaj +1 more source
Development of an Automatic Identification System Autonomous Positioning System
Sensors, 2015 In order to overcome the vulnerability of the global navigation satellite system (GNSS) and provide robust position, navigation and time (PNT) information in marine navigation, the autonomous positioning system based on ranging-mode Automatic ...
Qing Hu +4 more
doaj +1 more source