Radar Detection Device for Selective Clutter Suppression
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Solution Overview
Problem
Pulse Doppler radar systems using CFAR processing inadvertently suppress large targets like landmasses due to their high average amplitude, leading to incorrect target detection.
Innovation Solution
A detection device with a Doppler frequency component generator, region identifier, and suppressors that differentiate between regions to selectively apply suppression, preventing unnecessary suppression of large targets while maintaining target detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If CFAR processing is applied to suppress clutter, then clutter suppression is improved, but large targets such as landmasses are incorrectly suppressed
Solution Approach 1:
The detection range is divided into multiple regions based on amplitude characteristics. The region identification unit segments the detection space into regions with different suppression requirements, allowing differential processing where small targets receive clutter suppression while large targets are preserved
Solution Approach 2:
Different suppression strengths are applied to different regions of the detection space. The Doppler frequency component suppression unit adjusts the suppression level locally based on region identification, applying strong suppression to clutter-prone areas while maintaining signal integrity in regions containing large targets
2Loss of information
If Doppler frequency component suppression is applied to eliminate unnecessary signals, then signal clarity is improved, but reception signals in the first region are unnecessarily suppressed
Solution Approach 1:
The region identification unit performs preliminary classification of detection regions before suppression is applied. By identifying regions containing large targets in advance, the system prepares region information that guides the suppression unit to preserve appropriate signals while eliminating clutter
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively suppresses clutter while preserving the detection of large targets and moving bodies, enhancing radar detection performance by accurately distinguishing between target and non-target signals.
Implementation Method 1
The Doppler frequency component generator acquires a Doppler frequency component which indicates an amplitude level of a reception signal, for at least one Doppler frequency, based on the reception signal
Data Source
AI summary
A detection device detects a target based on a reception signal obtained from a reflection signal of a transmission signal. The detection device includes a Doppler frequency component generator that acquires a Doppler frequency component that indicates the amplitude level of a reception signal, for at least one Doppler frequency, based on the reception signal, a region identifier that identifies a first region and a second region that is outside the first region, based on the value of the amplitude level and the increase rate in the amplitude level, a second-Doppler frequency component suppressor that suppresses the Doppler frequency component of an unnecessary signal, out of the Doppler frequency component corresponding to the second region, and a combiner that combines the Doppler frequency component corresponding to the first region outputted from the region identifier, and the output of the second Doppler frequency component suppressor.