Weisong Wen (Welson)

icon indicating a website link https://weisongwen.github.io/ icon indicating an email [email protected]

icon company Hong Kong Polytechnic University/University of California, Berkeley icon location Hung Hom, Kwolon, Hong Kong/CA, USA icon location Assistant Professor at The Hong Kong Polytechnic University. GNSS, NLOS/Multipath Mitigation, LiDAR SLAM, Navigation, Robotics.

Results 163 issues of Weisong Wen (Welson)

Exploring the role of PPP–RTK network configuration: a balance of server budget and user performance

With atmospheric corrections generated from the server, precise point positioning real-time kinematic (PPP–RTK) can achieve high-precision solutions in a fast convergence. PPP–RTK users are concerned about how to use the...

Partial ambiguity resolution considering the multipath effects in a canyon environment

In the urban canyon environment, the integer ambiguity is hard to be fixed completely mainly because of the multipath effects, hence partial ambiguity resolution (PAR) is developed. This paper systematically...

Possibility of Centimeter Positioning Accuracy with Ambiguity Resolution from Android GNSS Raw Measurements

In this research, we improve the partial ambiguity resolution strategy of LAMBDA for Android-based GNSS data. The results show that it is possible to fix the ambiguity in an open...

Single-Frequency Multi-GNSS PPP-RTK for Smartphone Rapid Centimeter-Level Positioning

The availability of raw Android Global Navigation Satellite System (GNSS) data is driving innovation in high-precision positioning using Android smartphones. However, inconsistent pseudorange and phase observations, low dual-frequency data integrity,...

An Embedded High-Precision GNSS-Visual-Inertial Multi-Sensor Fusion Suite

Because of the high complementarity between global navigation satellite systems (GNSSs) and visual-inertial odometry (VIO), integrated GNSS-VIO navigation technology has been the subject of increased attention in recent years. In...

Multipath error mitigation method considering NLOS signal for high-precision GNSS data processing

The non-line-of-sight (NLOS) signal has different signal characteristics and error from multipath, and it may lead to significant errors in the Global Navigation Satellite System (GNSS) positioning at the centimeter...

Decentralized GNSS PPP-RTK

PPP-RTK, known as integer ambiguity resolution-enabled precise point positioning, requires precise satellite-related products and atmospheric corrections estimated in a global navigation satellite system (GNSS) network. In generating these products, one...

FF-LINS: A Consistent Frame-to-Frame Solid-State-LiDAR-Inertial State Estimator

Most of the existing LiDAR-inertial navigation systems are based on frame-to-map registrations, leading to inconsistency in state estimation. The newest solid-state LiDAR with a non-repetitive scanning pattern makes it possible...

On the equivalence of ionospheric-free, differenced, and undifferenced, uncombined GNSS network processing

Global Navigation Satellite System (GNSS) observations are commonly processed using various established methods, including the processing of ionospheric-free (IF) linear combinations (LC), differences of observations as well as the processing...

Development of a custom-built RTK-GNSS positioning system for agricultural operations

The objective of this research is to assess positioning accuracy of a custom-built RTK (Real Time Kinematic) base station. Setting up a RTK base station with open-source tools is rather...