Radar Detector Electromagnetic Compatibility Clutter Elimination
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Solution Overview
Problem
Radar detectors face interference from onboard pulse signal transmitters, leading to electromagnetic compatibility issues, as existing attenuation methods cut all reception during emission phases, reducing the ability to intercept radar signals of interest.
Innovation Solution
A method for testing electromagnetic compatibility by identifying and eliminating clutter components in received signals, using a training phase to characterize pulses, distribute them into classes, and select classes with a predetermined threshold, then eliminating pulses within specific ranges to prevent interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If effective attenuation is used in the entire reception frequency band of the radar detector, then electromagnetic compatibility is improved, but the ability to intercept radar signals of interest is reduced
Solution Approach 1:
The patent segments the reception frequency band into multiple sub-bands and applies selective attenuation only to specific sub-bands where interference occurs, rather than attenuating the entire frequency band. This allows the radar detector to maintain sensitivity in frequency ranges where useful signals are present while suppressing interference in specific frequency ranges.
Solution Approach 2:
The patent implements local quality by applying different attenuation characteristics to different frequency sub-bands based on the specific interference conditions. Each sub-band can have its own attenuation level, allowing the system to preserve signal quality in unaffected frequency ranges while effectively suppressing interference in problematic ranges.
2Object-affected harmful factors
If all reception is cut during emission phases, then interference from onboard transmitters is reduced, but the detection capability of radar signals is decreased
Solution Approach 1:
The patent employs periodic action by using synchronized attenuation that is activated only during specific time windows when onboard transmitter pulses are expected, rather than continuous attenuation. This timing-synchronized approach allows the radar detector to maintain full sensitivity during periods when no interference is present, thereby preserving detection capability while reducing interference impact.
Solution Approach 2:
The attenuation characteristic is made dynamic by adjusting it in real-time based on the detected presence and characteristics of interference signals. The system continuously monitors the frequency spectrum and adapts the attenuation profile dynamically, increasing attenuation only when and where interference is detected, thus maintaining optimal detection performance in interference-free conditions.
3Reliability
If clutter components are not eliminated, then signal processing is simpler, but electromagnetic compatibility and detection accuracy are reduced
Solution Approach 1:
The patent applies preliminary action by implementing clutter elimination through template matching and signal subtraction before final target detection and analysis. By removing clutter components in advance, the subsequent signal processing stages operate on cleaner data, improving detection accuracy while the complexity is managed through efficient algorithms that leverage the known characteristics of clutter signals.
Data Source
AI summary
The invention relates to a method for testing the electromagnetic compatibility of a radar detector with at least one onboard pulse signal transmitter, wherein said radar detector and each onboard transmitter are part of the same platform, by means of eliminating the onboard component in the signals received by said radar detector, where the onboard component corresponds to the mix of the direct component and the reflected component onboard, said method comprising a training phase allowing the detected pulses to be divided into classes, grouping together the pulses for which at least two characteristics have a common range of values, and a phase of eliminating, the pulses that belong to the selected classes.