Academic Staff

PhD, BEng

Area of Specialization
Satellite positioning and navigation; GNSS signal processing; Low Earth orbit satellite positioning, navigation, and timing (LEO PNT); Cellular signal positioning; GNSS radio frequency interference detection and localization; Wireless communications

Short Description
Dr Xu is currently Assistant Professor in the Department of Aeronautical and Aviation Engineering (AAE), The Hong Kong Polytechnic University. He received his BEng degree from Nanjing University of Science and Technology, China, in 2012, and the PhD degree in Control Science and Engineering from the same university in 2018. Prior to his current position, he was Postdoctoral Fellow and Research Assistant Professor with AAE. He visited The University of New South Wales, Australia, and Nanyang Technological University, Singapore, in 2023. He has been awarded several research grants including National Natural Science Foundation of China (NSFC) Young Scientists Fund, Guangdong Basic and Applied Basic Research Fund, State Key Laboratory of Satellite Navigation System and Equipment Technology Open Fund, etc. He also leads research collaborative projects with relevant industries.

Selected Publications

1. Fang, J., Zhang, L., Zhang, G., Xu, B.*, & Hsu, L.-T. (2025). Characterization and Validation of GNSS Multipath-Induced Doppler Measurement Error. IEEE Transactions on Aerospace and Electronic Systems, 61(2), 3498–3515.
2.  Zhang, Q., & Xu, B.* (2025). Analysis of multipath effects on LEO ranging-based positioning using BPSK and BOC signals in urban areas. Advances in Space Research, 75(3), 3298-3309.
3.  Qi, X., Xu, B.*, Wang, Z., & Hsu, L.-T. (2024). Random forest-based multipath parameter estimation. GPS Solutions, 28(126).
4.  Vicenzo, S., Xu, B.*, Xu, H., & Hsu, L.-T. (2024). GNSS Direct Position Estimation-inspired Positioning with Pseudorange Correlogram for Urban Navigation. GPS Solutions, 28(83).
5.  Iyer, K., Dey, A., Xu, B.*, Sharma, N., & Hsu, L.-T. (2024). Enhancing Positioning in GNSS Denied Environments by Synthesizing Measurements for EKF-based GNSS/IMU Fusion. IEEE Transactions on Vehicular Technology, 73(6), 7908-7924.
6.  Fang, J., Yue, J., Xu, B.*, & Hsu, L.-T. (2023). A post-correlation graphical way for continuous GNSS spoofing detection. Measurement, 216, 112974.
7.  Dey, A., Xu, B., Lu, X., & Sharma, N. (2022). GNSS Code Multipath Time-frequency Analysis Using Wavelet-based Synchrosqueezing Transform in Urban Environments. IEEE Geoscience and Remote Sensing Letters,19, 3512005.
8.  Yue, J., Xu, B.*, & Hsu, L.-T. (2022). Data Denoising Based on Hadamard Matrix Transformation and Rayleigh Quotient Maximization: Application to GNSS Signal Classification. IEEE Transactions on Instrumentation and Measurement, 71, 2512011.
9.  Dey, A., Iyer, K., Xu, B.*, Sharma, N., & Hsu, L.-T (2022). Carrier-Aided Dual Frequency Vectorized Tracking Architecture for NavIC Signals. IEEE Transactions on Instrumentation and Measurement, 71, 8500513.
10.  Qi, X., & Xu, B.* (2022). Hyperparameter Optimization of Neural Networks Based on Q-learning. Signal, Image and Video Processing,17,1669–1676.
11.  Jiang, C., Xu, B.*, & Hsu, L.-T. (2021). Probabilistic Approach to Detect and Correct GNSS NLOS Signals Using an Augmented State Vector in the Extended Kalman Filter. GPS Solutions, 25(72).
12. Xu, B., Jia, Q., & Hsu, L.-T. (2020). Vector Tracking Loop-Based GNSS NLOS Detection and Correction: Algorithm Design and Performance Analysis. IEEE Transactions on Instrumentation and Measurement, 69(7), 4604-4619.
13. Xu, B., & Hsu, L.-T. (2019). Open-source MATLAB code for GPS vector tracking on a software-defined receiver. GPS Solutions, 23(46).
14. Xu, B., Jia, Q., Luo, Y., & Hsu, L.-T. (2019). Intelligent GPS L1 LOS/Multipath/NLOS Classifiers Based on Correlator-, RINEX- and NMEA-Level Measurements. Remote Sensing, 11(16).
15. Xu, B., & Dou, L. (2018). GNSS IF Signal Simulation Considering Oscillator Phase Noise,” The Journal of Navigation, 71(4), 805-820.