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Alda Xhafa

Publications

Patents

    Chapters

    1. D. Egea-Roca, F. Fabra, A. Xhafa, J. A. Lopez-Salcedo, G. Seco-Granados, "Time of Arrival and Time Difference of Arrival", chapter in Localization in Wireless Networks: Technologies and Applications, N. Saeed, M. A. Khan, editors, Wiley-IEEE Press, Aug. 2026.
    2. J. A. Lopez-Salcedo, A. Xhafa, G. Seco-Granados, "Ch. 3.8, Sistemas de posicionamiento por satélite (GNSS)", chapter in Libro Blanco sobre Espacios Inteligentes y Tecnologías de Posicionamiento y Navegación en Entornos de Interior, J.J. Escudero, M.C. Rodríguez, A. Bahillo, A. Hernández (Editors), 108-115, May 2026.
    3. A. Xhafa, J. A. Lopez-Salcedo, G. Seco-Granados, "Ch 3.7.6, Redes Celulares", chapter in Libro Blanco sobre Espacios Inteligentes y Tecnologías de Posicionamiento y Navegación en Entornos de Interior, J.J. Escudero, M.C. Rodríguez, A. Bahillo, A. Hernández (Editors), 98-107, May 2026.
    4. A. Xhafa, D. Egea-Roca, F. Fabra, J. A. Lopez-Salcedo, G. Seco-Granados, "AoA Localization and Waveform desing", chapter in COST Action INTERACT WG2 Whitepaper on Signal Processing and Localization, A. Burr, A. Garcia Armada, C. Smeenk, Y. Miao (Editors), , Oct. 2024.

    Journals

    1. A. Xhafa, F. Fabra, D. Egea-Roca, J. A. Lopez-Salcedo, G. Seco-Granados, "Experimental Investigation of AoA Estimation and Antenna Calibration with 5G NR signals using USRP Devices", IEEE Transactions on Instrumentation and Measurement, vol. 74, pp. 1-15, May 2025, [link].
    2. 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].
    3. A. Xhafa, J. A. del Peral-Rosado, J. A. Lopez-Salcedo, G. Seco-Granados, "Evaluation of 5G positioning performance based on UTDoA, AoA and base-station selective exclusion", Sensors, vol. 22, num. 1, 14 pages, Jan. 2022, [link].

    Conferences

    1. J. A. del Peral-Rosado, S. Schlötzer, E. Ince, S. Al Faris, G. Ligorio, F. Soualle, A. Malik, C. Thienot, E. Eberlein, G. Yammine, K. Loidl, B. Ghimire, D. Egea-Roca, A. Xhafa, J. A. Lopez-Salcedo, G. Seco-Granados, I. Lapin, F. Grec, F. Abel, "Technology Enablers Towards Unified PNT with GNSS, 5G and 6G Solutions", Proc. ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), May 2026.
    2. A. Xhafa, D. Egea-Roca, J. A. Lopez-Salcedo, S. Schlötzer, J. A. del Peral-Rosado, F. Abel, G. Seco-Granados, "Hybrid Random-Directional RIS Phase Profile Design for Multi-Layer TN/NTN Positioning", Proc. ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), May 2026.
    3. D. Egea-Roca, A. Xhafa, J. A. Lopez-Salcedo, G. Seco-Granados, "First Results on RIS-Enabled Multi-Layer Localization: A Joint Terrestrial and Non-Terrestrial Method", Proc. IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), May 2026, [link].
    4. A. Xhafa, D. Egea-Roca, J. A. Lopez-Salcedo, G. Seco-Granados, "A Comparative Analysis of Key Performance Indicators for RIS-Enhanced Non-Terrestrial and Terrestrial Localization", Proc. European Signal Processing Conference (EUSIPCO), Sep. 2025, [link].
    5. D. Egea-Roca, A. Xhafa, J. A. Lopez-Salcedo, G. Seco-Granados, "Performance Assessment of Multi-RIS-Aided Localization in Terrestrial and Non-Terrestrial Networks", Proc. European Navigation Conference (ENC), May 2025, [link].
    6. A. Xhafa, F. Fabra, J. A. Lopez-Salcedo, G. Seco-Granados, I. Lapin, "Pathway to Coherent Phase Acquisition in Multi-channel USRP SDRs for Direction of Arrival Estimation", Proc. International Conference on Software Defined Systems (SDS), Oct. 2023, [link].
    7. A. Xhafa, F. Fabra, J. A. Lopez-Salcedo, G. Seco-Granados, "Preliminary Results of 5G Direction of Arrival Estimation using In-Situ Calibration with USRP", Proc. ICL-GNSS, June 2023, [link].
    8. A. Xhafa, J. A. del Peral-Rosado, G. Seco-Granados, J. A. Lopez-Salcedo, "Performance of NLOS Base Station Exclusion in cmWave 5G Positioning", Proc. IEEE Vehicular Technology Conference (VTC) Spring, Apr. 2021, [link].