12 papers
UE-Side Location Privacy for 5G NR Uplink Positioning: Mechanisms and Trade-offs
Giulia Focarelli, Alireza Pourafzal, Henk Wymeersch +1
Future 5G-Advanced and 6G networks increasingly reuse uplink communication waveforms for positioning and sensing. This raises privacy concerns, as user equipments (UEs) may uninten…
Task-Aware Beamforming for Semantic Wireless Localization
Mohammad Mahdi Mojahedian, Alireza Pourafzal, Musa Furkan Keskin +1
Many semantic localization tasks require determining a contextually meaningful region or state rather than minimizing the error of a full Cartesian position estimate. In such setti…
Dual-Orthogonality Waveforms for Integrated Communication and Imaging in Dynamic Multipath Channels
Edoardo Talignani, Francesco Linsalata, Musa Furkan Keskin +4
Dual-Orthogonality waveforms are multi-antenna signaling schemes that enforce mutual orthogonality across transmit channels and over a prescribed set of delay shifts. By relaxing s…
On-Site Beam Calibration for RIS-Aided Positioning Systems
Mengting Li, Hui Chen, Sigurd S. Petersen +5
High precision positioning is a key enabler for next-generation communication applications such as smart transportation and augmented reality. Reconfigurable intelligent surface (R…
From Pilot to Precoding Design: Blind Angular Spoofing For Location Privacy in MIMO Systems
Priyanka Maity, Lorenzo Italiano, Alireza Pourafzal +4
This paper studies location privacy in uplink MIMO systems, where a user equipment seeks to spoof the angular signature observed by a single base station performing localization. W…
Mismatch Analysis and Cooperative Calibration of Array Beam Patterns for ISAC Systems
Hui Chen, Mengting Li, Alireza Pourafzal +6
Integrated sensing and communication (ISAC) is a key technology for enabling a wide range of applications in future wireless systems. However, the sensing performance is often degr…