Using orthogonal space projections to generate a constant false alarm rate control parameter
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United States of America Patent
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Dec 27, 2016
Grant Date -
Feb 4, 2016
app pub date -
Jul 28, 2015
filing date -
Apr 26, 2012
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Abstract
An adaptive parameter for adjusting a threshold in a sensor system that provides a constant false alarm rate is disclosed. A projection space generator performs projection operations to create a matched projection space and first and second mismatched projection spaces such that each mismatched projection space is orthogonal or nearly orthogonal to the matched projection space. A mitigation engine receives the matched and first mismatched projection spaces and generates a set of weights from one of the first mismatched projection space or both of the matched and first mismatched projection spaces. A second mismatched projection space that is mismatched to both the matched and first mismatched projection spaces is provided to a clutter characterization engine that generates samples from the second mismatched projection space and the set of weights. The adaptive parameter is generated from the samples and is used as an input to a threshold adjuster in a target detector.
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