Abstract
In this article, first, the properties of the symmetric scattering space are examined based on the representation of the maximum symmetric scattering component proposed by Touzi. The symmetric scattering unit disc in the complex plane is mapped to a more intuitive unit sphere representation, and a new simpler classification method for symmetric scatterers is proposed based on a simplified symmetric scatterer scattering matrix metric distance. Then, a unified three-component scattering model for polarimetric coherent target decomposition (CTD) is proposed. Pauli decomposition, sphere, dihedral, helix (SDH) decomposition and Cameron decomposition can be expressed as a simplified form of the unified model with some certain restrictions, respectively. In addition, SDH decomposition and Cameron decomposition are proved to be equivalent by verification of restrictions’ consistency. Finally, by the combination of SDH decomposition and symmetric scatterer classification, a scattering matrix classification scheme is proposed to classify the scatterers into 12 scattering types.
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