Pulse-Doppler Radar Gating Score Calculation Using Multi-Attribute Fusion
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Solution Overview
Problem
Current pulse-Doppler radar systems face challenges in accurately assigning detections to target trajectories due to the limitations of using only position information, leading to misassignment and the creation of false targets in noise regions.
Innovation Solution
A method that integrates position, power, detection size, and ambiguous Doppler frequency shift data to calculate gating scores, using radial velocity and historical target data to enhance detection assignment accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only position information is used to calculate detection score, then the algorithm complexity is low, but the target tracking accuracy deteriorates and false targets are generated in noise regions
Solution Approach 1:
The patent merges multiple detection attributes (position, power, detection size, and ambiguous Doppler frequency shift) into a unified gating score calculation framework. This combination allows the system to differentiate between actual targets and noise by evaluating multiple characteristics simultaneously, thereby improving detection assignment accuracy while managing algorithm complexity through efficient integration of these parameters.
Solution Approach 2:
The patent transforms the detection evaluation from using only position information to using a multi-parameter approach. By introducing power, detection size, and Doppler frequency shift as additional parameters in the gating score calculation, the system achieves more accurate target identification and reduces false target generation in noise regions.
2Reliability
If multiple detection attributes are integrated to improve tracking accuracy, then the false target rate decreases, but the computational complexity increases
Solution Approach 1:
The patent performs preliminary calculations of detection attributes (power, size, Doppler frequency shift) before the gating score evaluation. By pre-computing these parameters and preparing the detection data structure in advance, the system reduces the computational burden during the actual tracking and scoring process, thereby managing complexity while maintaining high tracking reliability.
3Measurement precision
If ambiguous Doppler frequency shift is directly used, then the velocity measurement is obtained, but the Doppler ambiguity causes incorrect target identification
Solution Approach 1:
The patent uses detection size and power as intermediary parameters to resolve Doppler ambiguity. By combining these additional attributes with the ambiguous Doppler frequency shift in the gating score calculation, the system can differentiate between true targets and false targets that may have similar velocity measurements, thereby improving target identification reliability while utilizing the available velocity information.
Data Source
AI summary
The invention relates to a method of calculating gating scores in the pulse-Doppler radar using a combination of position, power, size of detection and ambiguous Doppler measurement data to effectively overcome the phenomenon of wrongly assigning detections to the target trajectory and creating false targets in noise regions. The method intelligently merges position, power, detection size and ambiguous Doppler measurement data information of the detections in the algorithm of calculating gating score to solve the problem of selection and disputation detections. The method is carried out through two steps, step 1: determine statistical quantities from the standard data set; step 2: gating selection algorithm.