Dr. Zhengjia Xu is a research fellow in Position, Navigation and Timing (PNT) with the Centre for Autonomous and Cyber-Physical Systems in the School of Aerospace, Transport and Manufacturing. With expertise in digital signal processing (DSP), navigation, software-defined radio/device development, and embedded system, he is currently working on designing and developing cutting-edge GNSS receivers with frontier techniques.

Dr. Zhengjia Xu received his Ph.D. degree in aerospace from Cranfield University in 2021 and his other degrees of B.S. degree in civil aviation electrical and electronic engineering and M.S. in vehicle operation engineering in 2014 and 2017, respectively. Before joining Cranfield University in 2023, Dr. Zhengjia Xu was previously enrolled as Senior Radio Frequency Engineer and junior consultant as an Electronics and Embedded Software Engineer. He has multi-discipline engineering and research background in a wide range of fields including: GNSS, advanced DSP applications, aerospace system, etc.

• GNSS
• Advanced DSP Applications
• Aerospace System

• Alyammahi, Z. Xu, et al, Reinforcement Learning for UAV Path Planning Under Complicated Constraints with GNSS Quality Awareness (ENC 2024) accepted.
• M. Raza, Z. Xu, et al, UAV Positioning System Utilizing Radionavigation Signals: Hardware Design and Initial Evaluation (ENC 2024) accepted
• Z. Xu, et al, NLOS Signal Detection From Early Late Prompt Correlators Using Convolutional LSTM Network (ENC 2024) accepted
• S. Tiwari, P. Peltola, Z. Xu, et al, Software-Defined VTL GNSS Receiver with AI-enhanced Resilience in High Dynamics and Stringent Conditions (ENC 2024) accepted
• Z. Xu, et al, Deep Learning Assisted Radar Jamming Detection from Target Returns for Joint Radar Communication Systems (IET Radar 2024) under review
• J. Li, Z. Xu, et al, Selection and Aggregation of Low-cost Particle Sensors for Outdoor Particulate Matter Measurement (I2MTC 2024) accepted
• T. Brun, Z. Xu, et al, Machine Learning Enhanced Signal Quality Assessment Leveraged with GDOP for GNSS/INS Fusion (I2MTC 2024) accepted
• Wenxing Liu, Hanlin Niu, Ipek Caliskanelli, Zhengjia Xu, Robert Skilton, Consensus-based Deep Reinforcement Learning for Mobile Robot Mapless Navigation (icit 2024) accepted
• Delezenne Q, Petrunin I, Xu Z, et al., (2024) Autonomous navigation with taxiway crossings identification using camera vision and airport map. In: AIAA SCITECH 2024 Forum, 8-12 January 2024, Orlando, USA.
• Z. Xu, I. Petrunin, A. Tsourdos, R. Grech, P. Peltola and S. Tiwari, "Combination and Selection of Machine Learning Algorithms in GNSS Architecture Design for Concurrent Executions with HIL Testing," 2023 IEEE/AIAA 42nd Digital Avionics Systems Conference (DASC), Barcelona, Spain, 2023, pp. 1-9, doi: 10.1109/DASC58513.2023.10311160.
• Wang, Y., Zeng, Q., Xu, Z., Li, B., & Wang, W. (2024). Three-Dimensional Composite Approach Angle Constrained Guidance Law with Actuator Lag Consideration. Journal of Aerospace Engineering, 37(2), 04023114.
• Yang, W.; Jiang, Y.; Chi, Y.; Xu, Z.; Wei, W. Long-Term Network Structure Evolution Investigation for Sustainability Improvement: An Empirical Analysis on Global Top Full-Service Carriers. Aerospace 2024, 11, 128. https://doi.org/10.3390/aerospace11020128
• Tabassum, T.E.; Xu, Z.; Petrunin, I.; Rana, Z.A. Integrating GRU with a Kalman Filter to Enhance Visual Inertial Odometry Performance in Complex Environments. Aerospace 2023, 10, 923. https://doi.org/10.3390/aerospace10110923
• Xu, Zhengjia, et al. "Efficient allocation for downlink multi-channel NOMA systems considering complex constraints." Sensors 21.5 (2021): 1833.
• Xu, Zhengjia, Ivan Petrunin, and Antonios Tsourdos. "Identification of communication signals using learning approaches for cognitive radio applications." IEEE Access 8 (2020): 128930128941.
• Xu, Zhengjia, Ivan Petrunin, and Antonios Tsourdos. "Modeling and performance analysis of opportunistic link selection for UAV communication." Sensors 21.2 (2021): 534.
• Xu, Zhengjia, Ivan Petrunin, and Antonios Tsourdos. "Dynamic Spectrum Management with Network Function Virtualization for UAV Communication." Journal of Intelligent & Robotic Systems 101.2 (2021): 1-18.
• Mondal, Sabyasachi, et al. "Autonomous architecture for uav-based agricultural survey." AIAA Scitech 2020 Forum. 2020.
• Xu, Zhengjia, et al. "Learning based spectrum hole detection for cognitive radio communication." 2019 IEEE/AIAA 38th Digital Avionics Systems Conference (DASC). IEEE, 2019.
• Xu, Zhengjia, et al. "Cognitive communication scheme for unmanned aerial vehicle operation." 2019 Workshop on Research, Education and Development of Unmanned Aerial Systems (RED UAS). IEEE, 2019.
• Xu, Zhengjia, et al. "Greedy based proactive spectrum handoff scheme for cognitive radio systems." 2019 IEEE Cognitive Communications for Aerospace Applications Workshop (CCAAW). IEEE, 2019.
• Yang Wendong, Jiajia Shao, Yun Jiang, Zhengjia Xu, and Antonios Tsourdos. "International Airline Alliance Network Design with Uncertainty." Applied Sciences 11, no. 7 (2021): 3065.
• Xu, Zhengjia, et al. "High-frequency band automatic mode recognition using deep learning." 2018 IEEE/AIAA 37th Digital Avionics Systems Conference (DASC). IEEE, 2018.
• Williamson, A., Mondal, S., Xu, Z., & Tsourdos, A. (2019, November). Autonomous collection of ground truth data by unmanned aerial vehicles instructed using SMS text messages. In 2019 Workshop on Research, Education and Development of Unmanned Aerial Systems (RED UAS) (pp. 260-265). IEEE.
• Ayub, S., Petrunin, I., Tsourdos, A., & Xu, Z. (2019, September). Analysis of Wireless Connectivity Applications at Airport Surface. In 2019 IEEE/AIAA 38th Digital Avionics Systems Conference (DASC) (pp. 1-10). IEEE.
• Xu,Zhengjia, et al. "Failure Diagnosis and Isolation of B747 One-Engine Failure Based on LPVFDI Method."4th International Conference on Control Engineering & Information Technology ISBN: 978-1-5090-1055-4 2016 IEEE(peer-reviewed)
• Xu,Zhengjia, et al. "Preliminary Research on Subspace Identification Method and Flight Accident Deduction Based on FDR." Computer Simulation ISSN 1006-9348 (in Chinese)
• Aiping Yin, Zhengjia Xu, et al. "Research on Civil Aircraft Engine Selection by Flight Performance Analysis." Aircraft Design ISSN 1673-4599 (in Chinese)
• Xuanming Cui, hongbin gu, Zhengjia Xu. "The development of Tower Control Simulation System" Digital Technology and Application ISSN 1007-9416 (in Chinese)

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