Patents

Chapters

Journals

1. Q. Liu, T. Reus, J. A. Lopez-Salcedo, G. Seco-Granados, "An Innovative Outer-Loop Positioning Framework for LEO Doppler Observations Considering Propagation Time", Satellite Navigation, vol. 7, art. 3, pp. 1-19, Mar. 2026, [link].
2. Q. Liu, C. Gao, R. Shang, W. Gao, J. A. Lopez-Salcedo, G. Seco-Granados, "GNSS/IMU/5G fusion positioning based on factor graph in urban environment", Measurement Science and Technology, vol. 36, May 2025, [link].
3. Q. Liu, Chengfa Gao, Rui Shang, Wang Gao, J. A. Lopez-Salcedo, G. Seco-Granados, "Hybrid GNSS+5G Position and Rotation Estimation Algorithm based on TOA and Unit Vector of Arrival in Urban Environment", IEEE Transactions on Instrumentation and Measurement, vol. 73, pp. 1-8, July 2024, [link].
4. Q. Liu, Chengfa Gao, A. Xhafa, Wang Gao, J. A. Lopez-Salcedo, G. Seco-Granados, "Performance Analysis of GNSS+5G Hybrid Positioning Algorithms for Smartphones in Urban Environments", IEEE Transactions on Instrumentation and Measurement, vol. 73, pp. 1-9, Dec. 2023, [link].

Conferences

1. Q. Liu, A. Reus-Bergas, J. A. Lopez-Salcedo, G. Seco-Granados, "An Enhanced Outer-Loop LEO Doppler Positioning Framework Incorporating Propagation Time", Proc. ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), May 2026.
2. M. Meneses, E. Domínguez, F. J. Mata, F. A. Pinto, D. García, J. Fidalgo, D. Giustiniano, G. Sanromita, T. Otim, F. Pigato, A. Reus-Bergas, M. Fernández-Temprado, Q. Liu, F. Fabra, G. Seco-Granados, J. A. Lopez-Salcedo, "Novel hybrid positioning terminal combining GNSS, LEO-PNT, 5G and LEO-SOP signals", Proc. European Navigation Conference (ENC), Apr. 2026.