Marine Radar System Using Chart Data Correlation for Stationary Target Detection
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Solution Overview
Problem
Commercial marine radar systems face challenges in accurately detecting and tracking multiple unknown targets and distinguishing them from fixed navigation objects, particularly when targets appear stationary.
Innovation Solution
A radar system employing a memory device and processor to store and process radar-return data, using correlation processing to differentiate between fixed landmarks and moving objects by analyzing successive scans and referencing a motion-compensated marine-chart database to identify and track vessels or hazards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional radar target detection methods are used, then the system can detect multiple targets, but it cannot effectively distinguish between moving targets and fixed landmarks when targets appear stationary
Solution Approach 1:
The system pre-stores high-resolution chart data of fixed landmarks in a database before radar operation. During radar scanning, the returned data is automatically correlated with this pre-stored chart data to identify and eliminate fixed landmarks, allowing accurate detection of moving targets even when they appear stationary relative to the radar.
2Measurement precision
If correlation processing is performed among multiple data sets to improve target identification, then the processing time and computational complexity increase
Solution Approach 1:
The system extracts only the essential correlation between radar return data and pre-stored chart data, focusing computational resources on comparing target positions and characteristics with known fixed landmarks. This selective extraction of correlation information enables efficient processing while maintaining high accuracy in distinguishing moving targets from fixed objects.
Data Source
AI summary
A radar system includes a memory device operable to store radar-return data characterizing at least one geographic region, a database including a set of chart data representing fixed landmarks associated with the at least one geographic region, and a processor coupled to the memory device. The processor is configured to obtain from the memory device multiple sets of the radar-return data corresponding to successive scans of the at least one geographic region, perform correlation processing among the multiple data sets to yield a first correlated data set, perform correlation processing between the first correlated data set and fixed-landmark chart data associated with the at least one geographic region to yield a second correlated data set, and process the second correlated data set to remove said fixed-landmark chart data therefrom and yield a third data set representing scanned objects that are not fixed landmarks.