Vehicular Radar Parameter Coordination for Interference Mitigation
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Solution Overview
Problem
The increasing number of vehicular radars on roads leads to significant radar interference issues, which existing techniques like interference suppression, random parameter assignment, and centralized control systems are inadequate in addressing due to inefficiency, inflexibility, and potential conflicts.
Innovation Solution
A radar sensor device determines its own radar parameters based on information from multiple sources to adaptively mitigate interference by selecting cooperative rules for parameter changes, utilizing vehicle-to-vehicle, vehicle-to-infrastructure, and vehicle-to-network communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of vehicular radars on roads increases to support self-driving vehicles, then the coverage and detection capability improve, but radar interference between vehicles increases causing radar blindness
Solution Approach 1:
The patent dynamically changes radar parameters (frequency, time offset, duty cycle) based on detected interference conditions and cooperative communication with other vehicles. This allows the radar system to adapt its operating parameters in real-time to avoid interference while maintaining detection capability.
Solution Approach 2:
The system implements feedback through cooperative communication where vehicles exchange radar parameter information and interference status. This feedback loop enables vehicles to adjust their radar parameters based on the operational state of other radars in the environment, preventing interference before it occurs.
2Object-affected harmful factors
If random parameter assignment is used to mitigate radar interference, then some interference avoidance is achieved, but conflicting assignments occur as the number of radars increases
Solution Approach 1:
The system uses feedback through cooperative communication to exchange radar parameter information between vehicles. This allows vehicles to detect potential conflicts in parameter assignments and negotiate alternative parameters that avoid interference, ensuring reliable parameter assignment even as the number of radars increases.
Solution Approach 2:
Instead of static random parameter assignment, the system dynamically adjusts radar parameters based on real-time communication with other vehicles and detected interference conditions. This dynamic adaptation ensures that parameter assignments remain conflict-free even in dense radar environments.
3Object-affected harmful factors
If centralized control systems are used to assign radar parameters, then parameter coordination is achieved, but system complexity and communication overhead increase
Solution Approach 1:
The patent distributes the radar parameter coordination function to individual vehicles through cooperative communication, rather than relying on a centralized control system. Each vehicle independently determines and adjusts its parameters based on information exchanged with neighboring vehicles, segmenting the control function across the distributed radar network.
Solution Approach 2:
Each radar system serves itself by independently determining appropriate parameters based on cooperative communication with other vehicles and local interference detection. This self-service approach eliminates the need for complex centralized control while achieving effective parameter coordination.
4Object-affected harmful factors
If interference suppression techniques are applied, then radar interference is reduced, but additional processing resources are required reducing efficiency
Solution Approach 1:
The system performs preliminary action by proactively adjusting radar parameters to avoid interference before it occurs, rather than suppressing interference after it happens. This preventive approach through dynamic parameter adjustment and cooperative communication eliminates the need for resource-intensive interference suppression processing.
Data Source
AI summary
This document discloses techniques, apparatuses, and systems for mitigating radar interference between radar sensor devices (e.g., on multiple vehicles), including various performed by a first radar sensor device (e.g., within a first vehicle). The first radar sensor device determines information about a driving scenario in a surrounding environment of the first radar sensor device based on information received from multiple sources. The first radar sensor may determine, based on the determined information about the driving scenario in the surrounding environment, how to change at least one radar parameter of the first radar sensor device to avoid a possible radar interference. The at least one radar parameter may be changed according to the determination. In this way, a radar sensor device may mitigate radar interferences and improve radar performance.