Wasserstein Mechanism for Hiding Cognition in Metacognitive Radars: A Distribution Privacy Framework

N. K.,Anup Aprem

Published 2025 in International Radar Conference

ABSTRACT

In this paper, we consider a cognitive radar electronic warfare scenario consisting of an inverse learning adversary - the adversary aims to learn the cognitive capabilities of the radar. The cognitive radar, as an electronic countercountermeasure, hides its cognitive capabilities during normal operation, a capability present in metacognitive radars. We formulate the problem of hiding cognition in the distribution privacy framework, a framework from machine learning that guarantees privacy from learning. The main contributions of the paper are: (i) Proposed an algorithm, based on Wasserstein mechanism, that guarantees distribution privacy, i.e. hiding cognitive capabilities of the radar, (ii) Characterizing the loss in utility while hiding cognition, (iii) Numerical results, for a beam allocation strategy, demonstrates that the proposed algorithm outperforms existing methodology in terms of utility loss and privacy guarantees, for a given privacy budget. In comparison to existing methodologies, the proposed algorithm requires minimal changes to the cognitive radar controller.

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