Approximately optimal radar target detection method against K-distributed clutter plus noise
A radar target and detection method technology, which is applied to radio wave measurement systems, instruments, etc., can solve problems such as poor detection performance, complex detector expressions, and reduced detection performance, and achieve the effect of improving detection performance
Active Publication Date: 2017-03-01
XIDIAN UNIV
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The invention discloses an approximately optimal radar target detection method against K-distributed clutter plus noise and aims to solve the problem that the prior art is not completely suitable for target detection against K-distributed clutter plus Gaussian white noise. The method comprises steps of: 1) acquiring an echo data matrix, and blocking the echo data matrix; 2) selecting a to-be-detected distance unit zk of the bth echo data block, and calculating the covariance matrix estimator R<k> of the to-be-detected distance unit zk; 3) calculating the carrier noise ratio CNR of the echo data by use of the covariance matrix estimator R<k>; 4) calculating the test statistics xik of the to-be-detected distance unit by use of the CNR and the R<k>; 5) calculating the detection threshold T<xi> according to the false alarm probability; and 6) judging whether the a target exists or not by comparing the size of the test statistics xik and the detection threshold T<xi>. In this way, the target detection performance is improved and the approximately optimal radar target detection method can be used for radar motion detection under the back ground of sea clutter.
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