Cooperative Radar Resource Coordination via Indication Signals
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Solution Overview
Problem
The increasing use of vehicle-mounted radars in intelligent vehicles leads to severe mutual interference, reducing detection probability and increasing false alarm rates, which negatively impacts driving safety and comfort.
Innovation Solution
A signal sending method and apparatus that enables cooperative radars to communicate and reduce interference by sending a first signal for target detection and a second signal indicating the resource occupied by the first signal, allowing other detection apparatuses to select non-interfering resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If more vehicle-mounted radars are deployed to improve detection coverage and functionality, then the detection capability and safety monitoring are enhanced, but the mutual interference between radars increases, reducing detection probability and increasing false alarm rates
Solution Approach 1:
The patent implements a feedback mechanism where radars transmit not only detection signals but also indication signals that carry information about occupied time-frequency resources. Other radars receive these indication signals and adjust their resource selection accordingly, creating a closed-loop feedback system that dynamically coordinates resource usage and eliminates mutual interference.
Solution Approach 2:
The indication signal acts as an intermediary between multiple radars. Instead of radars directly interfering with each other's detection signals, the indication signals mediate by conveying resource occupation information, allowing radars to indirectly coordinate their operations and select non-interfering time-frequency resources.
2Device complexity
If radars operate independently without communication to simplify system complexity, then device complexity is reduced, but mutual interference cannot be avoided, degrading detection performance
Solution Approach 1:
The patent segments the time-frequency resource space into distinguishable units and assigns different segments to different radars through the indication signal mechanism. This segmentation allows multiple radars to operate simultaneously in different resource segments, reducing interference while maintaining relatively simple individual radar structures.
Solution Approach 2:
The patent changes the operational parameters of radars by introducing indication signals that convey resource occupation information in time and frequency domains. This parameter change enables dynamic resource allocation and coordination, improving detection accuracy without requiring fundamental structural changes to the radar systems.
Data Source
AI summary
A signal sending method and a detection apparatus are provided. One method includes: sending, by a detection apparatus, a first signal for target detection, and sending, by the detection apparatus, a second signal indicating information about a resource occupied by the first signal.