A5055243240- GNSS positioning and interference
- Geophysics and Gravity Measurements
- Ionosphere and magnetosphere dynamics
- Inertial Sensor and Navigation
- Advanced Frequency and Time Standards
- Target Tracking and Data Fusion in Sensor Networks
- Spacecraft Design and Technology
- Soil Moisture and Remote Sensing
- Advanced Wireless Communication Techniques
- Structural Health Monitoring Techniques
- Geotechnical Engineering and Soil Stabilization
- Space Satellite Systems and Control
- Satellite Communication Systems
- Traffic Prediction and Management Techniques
- Structural Analysis and Optimization
- Simulation and Modeling Applications
- Advanced Chemical Sensor Technologies
- Robotic Locomotion and Control
- Robotic Mechanisms and Dynamics
- Technology and Security Systems
- Wireless Communication Networks Research
- Precipitation Measurement and Analysis
- Advanced Measurement and Detection Methods
- Advanced Measurement and Metrology Techniques
- Embedded Systems and FPGA Design
PLA Information Engineering University
2014-2024
Guangzhou Metro Group (China)
2024
Guangzhou Metro Design & Research Institute
2024
Nanjing University of Aeronautics and Astronautics
2024
Zhejiang Ocean University
2023
Zhejiang University
2023
Rensselaer Polytechnic Institute
2023
Huazhong University of Science and Technology
2023
University of Calgary
2018-2021
Hohai University
2018
Factor graph optimization has been widely used for state estimation in robotic SLAM community. Extensive algorithms have proposed camera/LiDAR/INS based SLAM. However, GNSS positioning on factor is limited, which prevents the introduction of high precise to The current implementations are focused pseudorange or RTK positioning. PPP with ambiguity resolution (AR) state-of-the-art technique past decade. Therefore, AR proposed, and carrier phases factors constructed from error equations raw...
Abstract Kalman or Kalman-related filtering methods are routinely applied in precise point positioning (PPP). However, robot simultaneous localization and mapping (SLAM) systems, factor graph optimization (FGO) has proven advantages over recent years, e.g. reducing the linearization error support of plug-and-play features for multiple sensor fusion. Therefore, it would be interesting to apply FGO PPP. In addition, will also facilitate tight integration PPP with Visual/LiDAR SLAM. this work,...
To meet the demands of civil aviation and other precise navigation applications, several satellite-based augmentation systems (SBASs) have been developed around world, such as Wide Area Augmentation System (WAAS) for North America, European Geostationary Navigation Overlay Service (EGNOS) Europe, Multi-functional Satellite (MSAS) Japan, GPS (Global Positioning System) Aided GEO Augmented (GAGAN) India, Differential Corrections Monitoring (SDCM) Russia. The SBASs broadcast messages to correct...
Abstract The China BeiDou Navigation Satellite System (BDS-3) is recognized for its advantages compared to BDS-2. However, the enhancement of performance through simultaneous utilization BDS-2 and BDS-3 in real-time kinematic (RTK) applications remains insufficiently investigated. Herein, we developed an overlapping triple-frequency (TF) BDS-3/BDS-2/inertial navigation system (INS) tightly coupled (TC) integration model that takes advantage BDS-3/BDS-2 frequencies B1I/B2b(B2I)/B3I...
The determination of slant total electron content (STEC) between satellites and receivers is the first step for establishing an ionospheric model. However, leveling errors, caused by smoothed ambiguity solutions in carrier-to-code (CCL) method, degrade performance ionosphere modeling differential code bias (DCB) estimation. To reduce uncombined undifferenced precise point positioning (PPP) method with resolution (AR) was used to directly extract STEC. Firstly, observables were estimated CCL,...
Cinder gravel, a porous, lightweight, and durable volcanic byproduct, has the potential to be sustainable cost-effective alternative conventional stone columns for ground improvement applications. Its use in soft soils, however, requires sufficient confining pressure prevent bulging thus performance degradation. Geotextile-encased cinder gravel (GECG) are an innovate method overcome this, but studies on bearing response pressure–deformation characteristics limited. A comprehensive numerical...
With the rapid development of unmanned ground vehicle industry, how to achieve continuous, reliable, and high-accuracy navigation becomes very important. At present, integrated with global satellite system strapdown inertial is most mature effective technology for vehicle. However, this technique depends on signal accuracy system. When receiver cannot capture four or more signals a long time completely invalid, it provide accurate positioning information Therefore, article combine...
Ambiguity resolution (AR) is critical for achieving a fast, high-precision solution in precise point positioning (PPP). In the standard uncombined PPP (S-UPPP) method, ionosphere-free code biases are superimposed by ambiguity and receiver clock offsets to be estimated. However, besides time-constant part of bias, complex time-varying term receivers destroy stability ambiguities degrade performance UPPP AR. The variation bias can confirmed analysis terms ionospheric observables, multipath...