Complete polarization synthetic aperture radar target decomposition method for adaptive selection unitary transformation

An adaptive selection, aperture radar technology, applied in the direction of radio wave reflection/re-radiation, using re-radiation, measuring devices, etc., can solve the problem that the helix angle cross polarization cannot be effectively compensated
CN104698447AInactive Publication Date: 2015-06-10NAT SPACE SCI CENT CAS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NAT SPACE SCI CENT CAS
Publication Date
2015-06-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a complete polarization synthetic aperture radar target decomposition method for adaptive selection unitary transformation. The method comprises the following steps: (1) performing two unitary transformations for singh for data coherence T matrix of the complete polarization synthetic aperture radar to obtain the matrix, (the formula is as shown in specification); (2) performing other two unitary transformations for the coherence T matrix to obtain the matrix T(omega), wherein the first unitary transformation is used for performing the spiral angle compensation and restraining the volume scattering excessive estimation of model decomposition, the second unitary transformation is used for further restraining the volume scattering excessive estimation and reducing one degree of freedom of the coherence T matrix; (3) comparing with element (the formula is as shown in specification) of the matrix (the formula is as shown in specification) with the element T33(omega) of the matrix T(omega); if (the formula is as shown in specification), and (the formula is as shown in specification), otherwise, T is equal to T(omega); (4) performing three-component model decomposition on coherence T matrix. The two unitary transformations for singh in the step (1) or the two unitary transformations in the step (2) can be selected for the coherence T matrix in a self-adaption mode by the method according to the real situation of the object, and the volume scattering excessive estimation problem of the model decomposition can be effectively restrained.
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Description

technical field

[0001] The invention relates to the field of target decomposition of full-polarization synthetic aperture radar, in particular to a target decomposition method of full-polarization synthetic aperture radar with adaptive selective unitary transformation. Background technique

[0002] In the field of all-polarization synthetic aperture radar target decomposition, model-based target decomposition has attracted extensive attention because of its simple concept and easy implementation. The seminal work in the field of model decomposition is the three-component model decomposition proposed by Freeman and Durden (see A.Freeman and S.L.Durden, "A three-component scattering model for polarimetric SAR data," IEEE Trans.Geosci.Remote Sens., vol .36, no.3, pp.963-973, May 1998.). The three-component model decomposition decomposes the target into surface scattering component, dihedral angle scattering component and volume scattering component. Cross-polar scatter occurs...

Claims

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