Radar Signal Authentication via Position Verification
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Solution Overview
Problem
In vehicle-to-vehicle (V2V) and vehicle-to-everything (V2X) communication systems, there is a need to authenticate the validity of information embedded within radar signals to prevent malicious or malfunctioning entities from sending false information, which could lead to unsafe vehicle behaviors.
Innovation Solution
A method and apparatus that authenticate the sender of radar signals by comparing the determined position of the sender with the position associated with the embedded information, using radar algorithms and reception characteristics, and adjusting a probability of authenticity based on correspondence, with additional checks involving motion feasibility and cross-validation with other sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If position verification and authentication procedures are implemented for radar signals, then the reliability of V2V/V2X communication is improved, but the device complexity and processing requirements increase
Solution Approach 1:
The patent performs position mapping and authentication checks as preliminary actions before processing the full radar signal data. By determining the sender position from received characteristics first, then verifying against embedded position information, the system establishes authenticity early in the processing chain, improving reliability without requiring complete signal analysis for every authentication decision
Solution Approach 2:
The authentication process is segmented into distinct functional blocks: a receiver for obtaining radar signals, a position mapping block for determining sender position, an authentication block for comparing position information, and a probability adjustment block for refining authenticity assessment. This segmentation allows each component to be optimized independently and processed in parallel where possible, managing system complexity through modular architecture
2Reliability
If multiple authentication checks including motion feasibility and cross-validation are performed, then the reliability of information verification is improved, but the loss of time in processing increases
Solution Approach 1:
The patent implements a tiered authentication approach where essential position verification is performed on all signals, while additional checks such as motion feasibility analysis and cross-validation with other sources are applied selectively. The system adjusts the probability of authenticity based on the results of these partial checks, allowing the system to make authentication decisions with varying levels of scrutiny depending on the context, thus balancing verification reliability with processing time
Solution Approach 2:
The authentication block uses feedback from position comparison results to adjust the probability of authenticity. When position information corresponds well, the probability increases; when there are discrepancies, the probability decreases. This feedback mechanism allows the system to adapt its verification intensity dynamically, spending more processing time on signals that require closer scrutiny while quickly accepting signals that clearly pass authentication criteria
Data Source
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AI summary
A method and apparatus are provided to authenticate information embedded within radar signals. Radar signals comprising embedded information are received from a first sender. First position information is determined corresponding to a position of the first sender. Second position information associated with the embedded information is determined. The first and second position information is compared.