A unified model of GNSS phase/code bias calibration for PPP ambiguity resolution with GPS, BDS, Galileo and GLONASS multi-frequency observations

X Li, X Li, Z Jiang, C Xia, Z Shen, J Wu - GPS Solutions, 2022 - Springer
The performance of high-precision Global Navigation Satellite System (GNSS) positioning
in multi-frequency and multi-constellation environments strongly depends on the …

Accurate and automatic extrinsic calibration for a monocular camera and heterogenous 3D LiDARs

X Li, F He, S Li, Y Zhou, C Xia, X Wang - IEEE Sensors Journal, 2022 - ieeexplore.ieee.org
Nowadays, portable cameras and LiDARs are widely applied in robotic applications for
environment perception, path planning, and high precision navigation. In such cases, accurate …

Accurate and Rapidly-Convergent GNSS/INS/LiDAR Tightly-Coupled Integration via Invariant EKF Based on Two-Frame Group

C Xia, X Li, F He, S Li, Y Zhou - IEEE Transactions on …, 2024 - ieeexplore.ieee.org
Nowadays, increasing attention has been directed toward the integration of global navigation
satellite system (GNSS), inertial navigation satellite system (INS), and light detection and …

Accurate and real-time 3D-LiDAR multiobject tracking using factor graph optimization

S Feng, X Li, Z Yan, S Li, Y Zhou, C Xia… - IEEE Sensors …, 2023 - ieeexplore.ieee.org
Accurate and real-time tracking of multiple moving objects in 3-D space is critical for intelligent
transportation applications such as autonomous driving and traffic monitoring. However, …

A filter-based integration of GNSS, INS, and stereo vision in tight mode with optimal smoothing

X Li, C Xia, S Li, Y Zhou, Z Shen, Z Qin - IEEE Sensors Journal, 2023 - ieeexplore.ieee.org
In recent years, it is increasingly prevalent to integrate global navigation satellite system (GNSS)
with visual-inertial navigation systems (VINSs) to provide high-precision and continuous …

Targetless extrinsic calibration of LiDAR–IMU system using raw GNSS observations for vehicle applications

S Li, X Li, Y Zhou, C Xia - IEEE Transactions on Instrumentation …, 2023 - ieeexplore.ieee.org
Nowadays, the low-cost micro electro mechanical systems (MEMSs)-based inertial
measurement units (IMU) and light detection and ranging (LiDAR) are commercially available in …

VIMOT: A tightly coupled estimator for stereo visual-inertial navigation and multiobject tracking

S Feng, X Li, C Xia, J Liao, Y Zhou… - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
Most existing visual-inertial navigation system (VINS) simply rejects dynamic object features
to improve navigation performance, rendering the loss of dynamic object motion information, …

PPP rapid ambiguity resolution using Android GNSS raw measurements with a low-cost helical antenna

X Li, H Wang, X Li, L Li, H Lv, Z Shen, C Xia, H Gou - Journal of Geodesy, 2022 - Springer
The release of GNSS raw measurement acquisition privileges on Google Android makes
high-precision positioning on the low-cost smart devices possible. However, influenced by the …

Enhancing RTK performance in urban environments by tightly integrating INS and LiDAR

X Li, S Wang, S Li, Y Zhou, C Xia… - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
High-precision and continuous positioning is a fundamental requirement for intelligent
navigation applications. Nowadays, the global navigation satellite system (GNSS) real-time …

Online visual-inertial extrinsic calibration utilizing GNSS measurements for vehicle applications

Y Zhou, S Li, C Xia, Z Shen, X Wang… - IEEE Sensors Journal, 2022 - ieeexplore.ieee.org
The visual-inertial navigation system (VINS) is a low-cost sensor suite that utilizes inertial
measurement unit (IMU) and camera data for vehicle ego-motion estimation and environmental …