Digital Radio Frequency Memory (DRFM) Mitigation, Echo Phase Encryption & Ghost Filtering

Neutralizing hostile DRFM repeaters attempting to inject non-existent radar targets or mask genuine physical obstacles.

Chirp-to-Chirp Phase Encryption

ISACSecurity dynamically alters carrier phase, sub-chirp spacing, and pseudo-random code sequences on every pulse. Malicious repeaters attempting to capture and replay echoes transmit outdated codes that are immediately discarded by the matched filter.

Bistatic Spatial Multipath Cross-Check

Echoes received across multiple distributed base stations are cross-correlated against 3D physical electromagnetic propagation models. Artificially delayed DRFM ghost targets fail geometric triangulation and are purged.

Pulse-to-pulse cryptographic phase scrambling preventing DRFM spoofing
Distributed spatial triangulation filtering out synthetic ghost target echoes
Maintains obstacle tracking integrity under active 40 dB jamming environments
Formal verification against electronic warfare repeater deception techniques

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