Sensing-Resistance-Oriented Beamforming for Privacy Protection from ISAC Devices
arxiv(2024)
摘要
With the evolution of integrated sensing and communication (ISAC) technology,
a growing number of devices go beyond conventional communication functions with
sensing abilities. Therefore, future networks are divinable to encounter new
privacy concerns on sensing, such as the exposure of position information to
unintended receivers. In contrast to traditional privacy preserving schemes
aiming to prevent eavesdropping, this contribution conceives a novel
beamforming design toward sensing resistance (SR). Specifically, we expect to
guarantee the communication quality while masking the real direction of the SR
transmitter during the communication. To evaluate the SR performance, a metric
termed angular-domain peak-to-average ratio (ADPAR) is first defined and
analyzed. Then, we resort to the null-space technique to conceal the real
direction, hence to convert the optimization problem to a more tractable form.
Moreover, semidefinite relaxation along with index optimization is further
utilized to obtain the optimal beamformer. Finally, simulation results
demonstrate the feasibility of the proposed SR-oriented beamforming design
toward privacy protection from ISAC receivers.
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