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Privacy-Preserving Beamforming for MIMO-OFDM Radio Localization

When a user's device sends uplink pilots so a legitimate base station can locate it, an eavesdropping base station can localize the user too. This concept covers designing the device's transmit beamformers to minimize the Cramer-Rao bound for legitimate localization while keeping the eavesdropper's Cramer-Rao bound above a threshold, solved through penalty dual decomposition.

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Privacy Preservation in MIMO-OFDM Localization Systems: A Beamforming Approach Yuchen Zhang, Hui

In radio localization a base station estimates a user's position from uplink pilot signals, but the openness of wireless propagation lets an unauthorized base station eavesdrop and localize the user …