Vehicle Radar Interference Reduction via Orientation-Based Parameter Selection
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Solution Overview
Problem
The increasing use of radars in vehicles for adaptive speed regulation and emergency braking detection leads to interference issues due to unregulated frequency band usage, compromising radar measurement accuracy and passenger safety.
Innovation Solution
A method for reducing radar interference by smartly coordinating the selection of radio signal transmission parameters based on the orientation of each radar's line of sight, ensuring that radars traveling in opposite directions use distinct transmission parameters to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If signal processing is applied to received signals to attenuate interference effects, then interference reduction is achieved, but device complexity and computing power requirements increase
Solution Approach 1:
The patent applies preliminary action by coordinating transmission parameters before signals are transmitted. Radars agree on parameter sets in advance based on their orientations, so that when signals are transmitted, they inherently do not interfere with each other. This avoids the need for complex post-reception signal processing to attenuate interference.
2Object-affected harmful factors
If transmission parameters are randomly modified to reduce interference, then interference reduction is partially achieved, but reliability and consistency deteriorate
Solution Approach 1:
The patent applies parameter changes by systematically varying transmission parameters (such as frequency, modulation type, or pulse characteristics) based on radar orientation. Instead of random modification, each radar selects from a predefined set of parameters corresponding to its orientation, ensuring consistent and reliable interference reduction across different scenarios.
3Measurement precision
If the number of radars in vehicles increases to improve safety and autonomous driving capabilities, then measurement precision and safety improve, but interference between radars increases
Solution Approach 1:
The patent applies local quality by tailoring transmission parameters to each radar's specific orientation and operational context. Each radar uses parameters locally optimized for its direction of travel and environment, allowing multiple radars to operate simultaneously with high measurement precision while minimizing interference through localized parameter adaptation.
Data Source
AI summary
Method and device for reducing interference affecting radars installed in vehicles based on smart and coordinated selection of radio transmission parameters according to contextual information specific to each radar. The method takes into account the orientation of the radar's line of sight in order to determine the parameters for the transmission of a radio signal by the radar. By associating a set of parameters for the transmission of a radio signal with the radar's orientation, it is ensured that radars installed in vehicles driving in opposite directions, and therefore having opposite orientations, are incapable of selecting, even by chance, sets of radio signal transmission parameters that are identical or have similarities such that the two signals could cause interference.