An GNSS/INS Integrated Navigation Algorithm Based on PSO-LSTM in Satellite Rejection

Y Cao, H Bai, K Jin, G Zou - Electronics, 2023 - mdpi.com
When the satellite signal is lost or interfered with, the traditional GNSS (Global Navigation
Satellite System)/INS (Inertial Navigation System) integrated navigation will degenerate into …

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 …

Risk-aware autonomous localization in harsh urban environments with mosaic zonotope shadow matching

D Neamati, S Bhamidipati, G Gao - Artificial Intelligence, 2023 - Elsevier
Urban localization with the Global Navigation Satellite System (GNSS) remains an unsolved
problem with frequent misdetection of which street or which side of the street the user is …

Neural city maps for GNSS nlos prediction

D Neamati, S Gupta, M Partha, G Gao - … Meeting of the Satellite Division of …, 2023 - ion.org
Tall city structures and street-side vegetation block signals from the Global Navigation
Satellite Systems (GNSS) and impede localization in urban settings. To improve accuracy …

GNSS Doppler Velocity Estimation Aided by 3D Mapping Database

L Zhang, HF Ng, Y Zhong, G Zhang… - IEEE Transactions on …, 2024 - ieeexplore.ieee.org
The recent surge in the development of autonomous vehicles has increased the need for
reliable dynamic positioning of road agents in urban areas. Doppler frequency …

3D mapping aided gnss positioning using doppler frequency for urban areas

L Zhang, HF Ng, G Zhang, LT Hsu - … Meeting of the Satellite Division of The …, 2023 - ion.org
The performance of global satellite navigation system (GNSS) positioning is severely
degraded in dense urban areas because of the signal reception induced by obstacles …

Smartphone level indoor/outdoor ubiquitous pedestrian positioning 3DMA GNSS/VINS integration using FGO

HY Ho, HF Ng, YT Leung… - … Archives of the …, 2023 - isprs-archives.copernicus.org
This paper discusses ubiquitous smartphone pedestrian positioning challenges in urban
canyons and GNSS-denied areas such as indoor spaces. Existing sensor-based …

Ray-Tracing Correction for GNSS Velocity Estimation Using Doppler Frequency: A Feasibility Analysis

L Zhang, HF Ng, G Zhang… - IEEE Transactions on …, 2024 - ieeexplore.ieee.org
Accurate positioning from the global navigation satellite system (GNSS) is critical for various
civil applications, such as location-based services (LBSs) and intelligent transportation …

Enhancing Smartphone-based Pedestrian Positioning: Using Factor Graph Optimization with Indoor/Outdoor Detection for 3DMA GNSS/Visual-Inertial State …

HY Ho, HF Ng, W Wen, Y Gu… - Journal of Data Science …, 2024 - ojs.bonviewpress.com
This paper explores the pervasive challenges of pedestrian positioning using smartphones
in densely populated urban environments where Global Navigation Satellite System (GNSS) …

Comparing Positioning Performance of LEO Mega-Constellations and GNSS in Urban Canyons

H More, E Cianca, M De Sanctis - IEEE Access, 2024 - ieeexplore.ieee.org
The use of Low Earth Orbit (LEO) mega-constellations for Positioning, Navigation, and
Timing (PNT) services has attracted a great deal of interest, as they could complement the …