Full-polarization high-resolution range profile target detection method based on generalized eigendecomposition

Abstract

The present invention discloses a generalized eigen-decomposition-based full polarimetric high resolution range profile target detection method. The method comprises the following steps of (1) obtaining the training target echo and the training clutter as the training data according to the echo of a known full polarimetric radar; calculating a covariance matrix C (O) of the coherent vectors of the training target echo and a covariance matrix C (C) of the coherent vectors of the training clutter; calculating a projection matrix P; (2) obtaining the test full polarimetric high resolution range profile of the full polarimetric radar as the test data; dividing the test data into L range cells, and extracting a coherent vector of each range cell of the test data; carrying out the premultiplication on the coherent vector of each range cell of the test data and the projection matrix P to obtain a reconstructing coherent vector of each range cell of the test data, and calculating the two-norm of the reconstructing coherent vector of each range cell; setting a detection threshold eta, if the two-norm of the reconstructing coherent vector k 'D(1) of the first range cell is not less than eta, determining the test data as a target, otherwise, determining as the clutter.

Description

technical field [0001] The invention belongs to the field of radar target detection, and relates to a full-polarization high-resolution range image target detection method based on generalized feature decomposition, which is suitable for full-polarization radar target detection. Background technique [0002] The traditional single-polarization wideband radar has only one receiving channel. When detecting the target, it can only detect the target through the amplitude information of the echo. With the continuous development of radar technology, full polarization radar has been more and more widely used. Since the fully polarized radar has four receiving channels and can provide rich polarization information, the target detection performance of the fully polarized radar is better than that of the traditional single polarized radar. However, most of the existing full-polarization radar target detection algorithms detect targets based on SAR images of targets, such as single ta...

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Problems solved by technology

However, most of the existing full-polarization radar target detection algorithms detect targets based on SAR images of targets, such as single target detector (STD) and partial target detector (PTD) based on geometric perturbation; In the range image, each range cell contains clutter, so the existing full-polarization radar target detection algorithm is not suitable for the target detection of the full-polarization high-resolution range image

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