Privacy Preservation in MIMO-OFDM Localization Systems: A Beamforming Approach
Artikel i vetenskaplig tidskrift, 2025
We investigate an uplink MIMO-OFDM localization scenario where a legitimate base station (BS) aims to localize a user equipment (UE) using pilot signals transmitted by the UE, while an unauthorized BS attempts to localize the UE by eavesdropping on these pilots, posing a risk to the UE’s location privacy. To enhance legitimate localization performance while protecting the UE’s privacy, we formulate an optimization problem regarding the beamformers at the UE, aiming to minimize the Cramér-Rao bound (CRB) for legitimate localization while constraining the CRB for unauthorized localization above a threshold. A penalty dual decomposition optimization framework is employed to solve the problem, leading to a novel beamforming approach for location privacy preservation. Numerical results confirm the effectiveness of the proposed approach and demonstrate its superiority over existing benchmarks.
beamforming
Radio localization
location privacy
Cramér-Rao bound
Författare
Yuchen Zhang
King Abdullah University of Science and Technology (KAUST)
Hui Chen
Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk
Musa Furkan Keskin
Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk
Alireza Pourafzal
Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk
Pinjun Zheng
University of British Columbia (UBC)
Henk Wymeersch
Chalmers styrkeområde Transport
Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk
Tareq Y. Al-Naffouri
King Abdullah University of Science and Technology (KAUST)
IEEE Wireless Communications Letters
2162-2337 (ISSN) 2162-2345 (eISSN)
Vol. 14 7 1979-1983Platsintegritet och säkerhet för bortom 5G-system
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Europeiska kommissionen (EU) (101095759-Hexa-X-II), 2022-12-01 -- 2025-06-30.
Lokalisering och avkänning för perceptiva cellfria nätverk mot 6G
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Styrkeområden
Informations- och kommunikationsteknik
Ämneskategorier (SSIF 2025)
Kommunikationssystem
Signalbehandling
DOI
10.1109/LWC.2025.3560219