Polarization rotation domain feature extraction and radar target enhancement method and device

Abstract

The invention discloses a polarization rotation domain feature extraction and radar target enhancement method and device. The method comprises the steps of carrying out the rotation of an obtained polarization scattering matrix in a direction around the sight line of a polarization radar, and obtaining a rotation polarization scattering matrix; extracting a scattering vector based on the rotational polarization scattering matrix; extracting a polarization channel combination based on the scattering vector, and carrying out visualization processing on a polarization correlation value to obtaina polarization correlation directional diagram; extracting the following polarization-related directional diagram characteristics from the polarization-related directional diagram to perform parametric description: an original polarization-related characteristic value, a polarization-related characteristic maximum value, a polarization-related characteristic minimum value, polarization relevancy,polarization-related fluctuation, polarization-related contrast, polarization-related antientropy, a maximum rotation angle, a minimum rotation angle and a polarization-related width. The problem thattargets are not prominent and difficult to recognize in the prior art is solved, and target enhancement is achieved.

Description

technical field [0001] The invention relates to the technical field of radar polarization information processing and application, in particular to a method and device for polarization rotation domain feature extraction and radar target enhancement. Background technique [0002] Polarization radar can obtain the polarization information of the target by sending and receiving a group of electromagnetic waves with orthogonal polarization states, and plays an important role in the fields of target scattering mechanism interpretation, characteristic parameter inversion, target detection and identification, etc. Mainstream sensors in many important fields such as observation, air defense and anti-missile, weather detection, and sea surface monitoring have been widely used. [0003] The target polarization information obtained by polarimetric radar can be characterized by the polarization scattering matrix. The polarization correlation features between different polarization chann...

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Problems solved by technology

[0005] The present invention provides a method and device for polarization rotation domain feature extraction and radar target enhancement, which are used to overcome the defects in the prior art that the radar target contrast is low, the target scattering characteristics are sensitive to the relative geometric relationship between the target attitude and the radar line of sight, and the like. The polarization correlation values ​​between the two polarization channels are visualized and parametrically described in the polarization rotation domain, which can extract the characteristics of the polarization rotation domain and effectively enhance the recognizability of radar targets, which can be applied to a variety of purposes (such as for air surveillance, earth observation, meteorological detection, sea surface surveillance, etc.), and has application value in the fields of air target classification and identification, ground object category identification, damage assessment, etc.

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