Radar SNR Consistency Check for Ghost Target Detection

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Solution Overview

Problem

Modern vehicles equipped with radar sensing systems are susceptible to malicious attacks that result in the detection of 'ghost' targets, which are false detections caused by attacker vehicles mimicking radar waveforms to deceive the radar system.

Innovation Solution

A system implemented in vehicles, comprising electronic control units (ECUs) and a signal-to-noise ratio (SNR) consistency monitor, which varies the transmit power of radar signals and analyzes the SNR and range data to distinguish actual targets from ghost targets based on the pattern of SNR over range.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If radar sensing systems are used for target detection, then target detection capability is improved, but susceptibility to ghost target attacks increases

Engineering Contradiction:

Improvetarget detection capabilityVSAvoidsusceptibility to ghost target attacks

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The system performs preliminary actions by varying transmit power before final target identification. Multiple transmit power levels are tested in advance to establish expected SNR patterns, allowing the system to prepare reference data for later ghost target detection and verification

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements feedback by continuously monitoring SNR consistency between actual measurements and expected patterns. The SNR consistency monitor compares received SNR values against predicted values based on varied transmit powers, providing feedback that identifies when ghost targets are present and triggers appropriate responses

Inventive Principle:

Principle #23Feedback

2Measurement precision

If transmit power is varied to detect ghost targets, then ghost target detection accuracy is improved, but system complexity increases

Engineering Contradiction:

Improveghost target detection accuracyVSAvoidsystem complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The system changes physical parameters by varying transmit power levels across multiple measurement cycles. Different power levels create distinct SNR patterns that serve as fingerprints for legitimate targets, enabling differentiation from ghost targets through parameter comparison

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent introduces an intermediary SNR consistency monitor that mediates between the radar sensing system and target identification. This intermediary component simplifies the overall system by centralizing the complex SNR analysis and pattern matching functions in a dedicated module

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentEP4109786B1Signal-to-noise ratio range consistency check for radar ghost target detection

Publication Date: 2025.03.05 INTEL CORP

Figure 1A~1B
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AI summary

Systems, apparatuses, and methods to response to distinguish a ghost target from an actual target based on radar signals is provided. In particular, the disclosure provides an intrusion detection system adapted to receive radar signals and distinguish a potential ghost target from a legitimate target based on a signal to noise ratio of the radar signals and a range to the ghost target and the legitimate target.