标题： CSI模糊：单天线发射器无法隐藏来自对抗性多天线无线电定位系统的视线 显示英文标题

标题： CSI Obfuscation: Single-Antenna Transmitters Can Not Hide from Adversarial Multi-Antenna Radio Localization Systems

摘要： 现代电信系统在无线电环境中的用户和物体定位能力引发了合理的隐私担忧。 为了防止未经授权的定位，单天线发射器可以通过在传输前将信号与随机序列进行卷积来混淆信号，这会改变接收端估计的信道状态信息（CSI）。 然而，这种策略仅对部署单天线接收器的基于CSI的定位系统有效。 受盲多信道识别概念的启发，我们提出了一种针对多天线接收器的简单CSI恢复方法，以提取确保无论发射信号如何都能可靠进行用户定位的信道特征。 我们通过实际的信道测量，对比评估了信号混淆和所提出的恢复方法对CSI指纹识别、信道制图和经典三角定位的定位性能的影响。 这项工作旨在证明进一步努力保护用户位置隐私以抵御对抗性基于无线电的定位系统的必要性。 显示英文摘要

摘要： The ability of modern telecommunication systems to locate users and objects in the radio environment raises justified privacy concerns. To prevent unauthorized localization, single-antenna transmitters can obfuscate the signal by convolving it with a randomized sequence prior to transmission, which alters the channel state information (CSI) estimated at the receiver. However, this strategy is only effective against CSI-based localization systems deploying single-antenna receivers. Inspired by the concept of blind multichannel identification, we propose a simple CSI recovery method for multi-antenna receivers to extract channel features that ensure reliable user localization regardless of the transmitted signal. We comparatively evaluate the impact of signal obfuscation and the proposed recovery method on the localization performance of CSI fingerprinting, channel charting, and classical triangulation using real-world channel measurements. This work aims to demonstrate the necessity for further efforts to protect the location privacy of users from adversarial radio-based localization systems.