Radar Frequency-Band State Detection Using Shared Thresholds
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Solution Overview
Problem
The increasing mutual interference between vehicle-mounted radars in intelligent vehicles leads to reduced detection accuracy due to inconsistent frequency band selection and utilization, as different manufacturers have varying detection thresholds, limiting resource utilization and causing interference issues.
Innovation Solution
A frequency band state determining method that listens to ambient radar signals to determine the state of optional scanning frequency bands, allowing for standardized selection of an appropriate frequency band based on the detected states, thereby balancing resource utilization and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different manufacturers use different detection thresholds for frequency band state determination, then each manufacturer can optimize for its own radar performance, but resource utilization is limited and interference cannot be fully avoided
Solution Approach 1:
The patent changes the detection parameter from simple threshold comparison to standardized signal power measurement. By converting different manufacturers' detection thresholds into a unified signal power-based standard, the system maintains detection accuracy while enabling fair resource allocation across different radar devices, thus resolving the contradiction between reliability and productivity
Solution Approach 2:
The patent creates equipotentiality by establishing a common detection standard for frequency band state determination. All radar devices use the same signal power threshold criteria, ensuring equal opportunity for resource selection and eliminating the disadvantage of manufacturers with stricter thresholds, thereby improving overall resource utilization while maintaining consistent detection reliability
2Device complexity
If only threshold detection is used for frequency band state determination, then the detection process is simple, but anti-interference capability cannot be fully utilized and resource selection is limited
Solution Approach 1:
The patent introduces an intermediary mechanism - a standardized signal power measurement process - between the raw received signal and the frequency band state determination. This intermediary step enables full utilization of anti-interference capability by properly evaluating signal conditions while maintaining a relatively simple overall detection process, thus resolving the contradiction between device complexity and adaptability
3Adaptability or versatility
If radars select frequency bands independently without coordination, then each radar can optimize its own performance, but mutual interference becomes severe and detection accuracy is reduced
Solution Approach 1:
The patent implements feedback by having radars listen to ambient radio frequency signals and determine frequency band states based on standardized signal power measurements. This feedback mechanism allows radars to adjust their frequency band selection based on actual environmental conditions and other radars' transmissions, maintaining selection flexibility while significantly reducing mutual interference through coordinated resource allocation
Data Source
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AI summary
A frequency band state determining method and a related device are provided. The method includes: A detection apparatus determines an intermediate frequency signal based on a detected interfering signal in an environment and an oscillation signal that belongs to a first frequency band. The detection apparatus performs first processing on the intermediate frequency signal, to obtain a first detection result, and when the first detection result indicates that the first frequency band is busy, the detection apparatus performs second processing on the intermediate frequency signal, to obtain a second detection result. The detection apparatus determines a state of the first frequency band based on the second detection result. The detection apparatus may be a radar, and the radar may work in a use scenario of a cooperative radar. A frequency band state is determined by using a same threshold, so that fairness in selecting resources can be balanced. In addition, the frequency band state can be determined with reference to an anti-interference capability of the detection apparatus, to increase resource utilization.