An overview of developments and challenges for unmanned surface vehicle autonomous berthing

G Wu, D Li, H Ding, D Shi, B Han - Complex & Intelligent Systems, 2024 - Springer
With the continuous progress of contemporary science and technology and the increasing
requirements for marine vehicles in various fields, the intelligence and automation of ships …

Estimation of berthing state of maritime autonomous surface ships based on 3D LiDAR

B Hu, X Liu, Q Jing, H Lyu, Y Yin - Ocean Engineering, 2022 - Elsevier
During the process of automatic berthing, the maritime autonomous surface ship (MASS)
needs to sense its own status relative to the berth in real-time and accurately to avoid …

Urban positioning: 3D mapping‐aided GNSS using dual‐frequency pseudorange measurements from smartphones

H Ng, G Zhang, Y Luo, L Hsu - Navigation, 2021 - Wiley Online Library
A smartphone with a highly sensitive antenna receiving numerous unhealthy measurements
suffers from non‐line‐of‐sight (NLOS) reception and multipath effects. 3D mapping‐aided …

3D-mapping-aided PPP-RTK aiming at deep urban canyons

S Xin, J Geng, G Zhang, HF Ng, J Guo, LT Hsu - Journal of Geodesy, 2022 - Springer
As a hot topic in the GNSS community in recent years, PPP-RTK integrates the advantages
of PPP and RTK, aiming to quickly realize centimeter-level single point positioning with …

[HTML][HTML] Real-time loosely coupled 3DMA GNSS/Doppler measurements integration using a graph optimization and its performance assessments in urban canyons of …

HF Ng, LT Hsu, MJL Lee, J Feng, T Naeimi, M Beheshti… - Sensors, 2022 - mdpi.com
Smart health applications have received significant attention in recent years. Novel
applications hold significant promise to overcome many of the inconveniences faced by …

Comparative analysis of 3D LiDAR scan-matching methods for state estimation of autonomous surface vessel

H Wang, Y Yin, Q Jing - Journal of Marine Science and Engineering, 2023 - mdpi.com
Accurate positioning and state estimation of surface vessels are prerequisites to achieving
autonomous navigation. Recently, the rapid development of 3D LiDARs has promoted the …

Motion pose estimation of inshore ships based on point cloud

X Lu, Y Li - Measurement, 2022 - Elsevier
This paper proposes a new method to obtain the pose information estimation of the ship at
multiple points based on point cloud data. Compared with the traditional pose estimation …

Spatial state analysis of ship during berthing and unberthing process based on 3D LiDAR

TQ Wang, Y Li, C Chen - Ocean Engineering, 2023 - Elsevier
In smart ports, accurate perception of vessels' state during berthing and unberthing is crucial
to ensure the safety of vessels and ports. In this paper, a method for better monitoring the …

Multi-Epoch Kriging-Based 3D Mapping-Aided GNSS and Doppler Measurement Fusion using Factor Graph Optimization

HF Ng, LT Hsu, G Zhang - NAVIGATION: Journal of the Institute of …, 2023 - navi.ion.org
Global navigation satellite system (GNSS) signal reflection over buildings degrades
positioning performance in urban canyons. Different three-dimensional (3D) mapping-aided …

Multi-epoch Kriging-based 3D mapping aided GNSS using factor graph optimization

HF Ng - Proceedings of the 35th International Technical …, 2022 - ion.org
The performance of the Global navigation satellite system (GNSS) is limited in urban
canyons because the signals are reflected over building surfaces. Urban localization can be …