Review of PPP–RTK: Achievements, challenges, and opportunities

X Li, J Huang, X Li, Z Shen, J Han, L Li, B Wang - Satellite navigation, 2022 - Springer
The PPP–RTK method, which combines the concepts of Precise of Point Positioning (PPP)
and Real-Time Kinematic (RTK), is proposed to provide a centimeter-accuracy positioning …

Recent advances and perspectives in GNSS PPP-RTK

P Hou, J Zha, T Liu, B Zhang - Measurement Science and …, 2023 - iopscience.iop.org
Precise point positioning-real-time kinematic (PPP-RTK), otherwise known as integer
ambiguity resolution-enabled precise pointing positioning, has attracted much attention in …

Centimeter-accurate vehicle navigation in urban environments with a tightly integrated PPP-RTK/MEMS/vision system

X Li, X Li, S Li, Y Zhou, M Sun, Q Xu, Z Xu - Gps Solutions, 2022 - Springer
Emerging applications like autonomous cars and unmanned aerial vehicles demand
accurate, continuous and reliable positioning. The PPP-RTK technique, which could provide …

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 …

Continuous and precise positioning in urban environments by tightly coupled integration of GNSS, INS and vision

X Li, S Li, Y Zhou, Z Shen, X Wang… - IEEE Robotics and …, 2022 - ieeexplore.ieee.org
Accurate, continuous and seamless state estimation is the fundamental module for
intelligent navigation applications, such as self-driving cars and autonomous robots …

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 …

An indoor and outdoor seamless positioning system for low-cost UGV using PPP/INS/UWB tightly coupled integration

X Li, Z Wu, Z Shen, Z Xu, X Li, S Li… - IEEE Sensors Journal, 2023 - ieeexplore.ieee.org
Seamless positioning is critical for mobile robots to achieve ubiquitous availability in all
scenarios. The precise point positioning (PPP) technique provides a centimeter-level …

A high-precision vehicle navigation system based on tightly coupled PPP-RTK/INS/odometer integration

X Li, Z Qin, Z Shen, X Li, Y Zhou… - IEEE Transactions on …, 2022 - ieeexplore.ieee.org
High-precision position, velocity, and orientation information is essential for vehicles to
achieve autonomous driving. In this contribution, we propose a multi-sensor integration …

Improving PPP-RTK-based vehicle navigation in urban environments via multilayer perceptron-based NLOS signal detection

X Li, Q Xu, X Li, H Xin, Y Yuan, Z Shen, Y Zhou - GPS Solutions, 2024 - Springer
As the latest representative of GNSS positioning technology, the PPP-RTK method, which is
able to achieve centimeter-level positioning using a single receiver, has been recognized as …

Precise and robust IMU-centric vehicle navigation via tightly integrating multiple homogeneous GNSS terminals

Z Shen, X Li, X Li, Z Xu, Z Wu… - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
In the realm of signal interference mitigation and precise attitude estimation, the utilization of
multiple homogeneous global navigation satellite system (GNSS) antennas/terminals has …