Radar Signal Processing for Fast-Moving Target Detection
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Solution Overview
Problem
Conventional radar systems weaken echo signals of fast-moving target objects due to scan-to-scan correlation processing, which reduces their detectability.
Innovation Solution
A signal processing device and method that includes an echo signal input module, detection module, correlation processing module, and level adjustment module to enhance echo signal levels at detected target object locations using a Gauss function-based adjustment, preventing excessive accentuation at specific locations and considering target object size and detection patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If scan-to-scan correlation processing is applied to accentuate target object echoes, then detection reliability of stationary or slow-moving targets is improved, but echo signal levels of fast-moving target objects become weaker
Solution Approach 1:
The patent applies different processing strategies to different regions of the radar scan based on target detection results. When a target is detected, the system performs scan-to-scan correlation processing at that specific location to improve detection reliability, while avoiding excessive correlation processing that would weaken fast-moving targets. This localized application of correlation processing resolves the contradiction by adapting the processing intensity to the specific detection needs of each region.
Solution Approach 2:
The system dynamically adjusts the correlation processing based on real-time target detection results. By detecting targets first and then applying correlation processing selectively, the system adapts its processing strategy to maintain echo signal levels for fast-moving targets while improving detection reliability for stationary targets. This dynamic approach allows the system to respond to different target motion characteristics.
2Difficulty of detecting and measuring
If scan-to-scan correlation processing is applied to accentuate target object echoes, then detection capability of target objects is improved, but echo signals of fast-moving targets become weaker due to low correlation at different locations
Solution Approach 1:
The patent performs target object detection before applying scan-to-scan correlation processing. By detecting targets in advance and identifying their locations, the system can then apply correlation processing selectively to enhance detection capability while preserving echo signal levels for fast-moving targets that may appear at different locations between scans. This preliminary detection step allows the system to adapt the correlation processing to actual target positions.
Solution Approach 2:
The system applies correlation processing locally at detected target locations rather than uniformly across the entire scan area. This localized approach improves detection capability at specific target positions while avoiding the signal weakening that would occur if correlation processing were applied uniformly, particularly benefiting fast-moving targets that change position between scans.
3Manufacturing precision
If level adjustment is applied to accentuate echo signals at detected target locations, then signal output level is improved, but excessive accentuation may occur at particular locations
Solution Approach 1:
The patent applies level adjustment selectively only at locations where target objects are detected, rather than uniformly across the entire scan area. This localized accentuation improves signal output levels for actual targets while avoiding excessive accentuation that would create false detections or mask other targets. The system adjusts levels based on the specific detection results at each location.
Solution Approach 2:
The system uses target detection results as feedback to control the level adjustment process. By detecting targets first and then using this information to guide where level adjustment should be applied, the system ensures that accentuation is applied only where needed, maintaining detection accuracy while improving signal output levels for actual targets.
Data Source
AI summary
A signal processing device, which includes an echo signal input module for inputting echo signals from an antenna discharging electromagnetic waves to a predetermined area and receiving the echo signals reflected on a target object, an echo signal level detection module for detecting a level of each of the echo signals from each location within the predetermined area, a target object detection module for detecting the target object based on the levels of the echo signals, a correlation processing module for performing scan-to-scan correlation processing of a plurality of scans, and a level adjustment module for adjusting the levels of the echo signals after the scan-to-scan correlation processing. The level adjustment module adjusts the levels of the echo signals corresponding to the locations where the target object detection module detects the target object.