Wake filter for false alarm suppression and tracking
First Claim
1. A system for optimizing detection in a radar system;
- means for storing detections of targets;
means for assigning a confidence boost to such detections as a predetermined function of previous detections to generate new event signals;
means for comparing said new event signals with a predetermined threshold and indicating a true detection when said new event signals exceeds said threshold.
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Accused Products
Abstract
A processing technique suitable for use with a search radar system which minimizes the false detection of targets. Rather than rely on a predetermined target trajectory, such as a straight line trajectory in range time space, the processing technique in accordance with the present invention is not based on a target dynamics model. The system in accordance with the present invention relies on past detections and assigns a confidence level to detections which are in the wake of a previous detection. A wake function is used to determine the amount by which each detection recursively accrues confidence based on a limited record of past detections. A detection is declared when the confidence level exceeds a predetermined threshold. As detections are encountered in range time space, such detections are used to form wakes based on the wake function which are used to assign confidence levels for future detections.
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Citations
22 Claims
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1. A system for optimizing detection in a radar system;
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means for storing detections of targets; means for assigning a confidence boost to such detections as a predetermined function of previous detections to generate new event signals; means for comparing said new event signals with a predetermined threshold and indicating a true detection when said new event signals exceeds said threshold. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9, 10, 11, 12)
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7. A process for optimizing detection in a radar process, comprising the steps of:
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(a) storing detection of targets; (b) assigning a confidence boost to such detections as a predetermined function of previous detections to generate new event signals; (c) comparing said new event signals with a predetermined threshold and indicating true detection when said new event exceeds said threshold.
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13. A system for minimizing false detections of a radar system, the system comprising:
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a random access memory (RAM) for storing range bin bj and time tj indices for new detection signals; a read only memory for storing a non-linear function accessible by one or more of said indices and generating a confidence boost as a predetermined function of previous detections; and means for adding said confidence boost to said new detection signals. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A process for minimizing false detections of a radar system, the system comprising:
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(a) storing the range bin index bj for each new detection signal in a random access memory; (b) comparing the range bin index bj for each new detection signal with previously stored detection signals; (c) determining the maximum absolute value of the difference between said new detection signal and each of said previously stored detection signals; (d) adding a confidence boost signal to said new detection signal as a function of said maximum value. - View Dependent Claims (20, 21, 22)
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Specification