Optimal Problem for Contrast Enhancement in Polarimetric Radar Remote Sensing

Jian YANG  Yoshio YAMAGUCHI  Hiroyoshi YAMADA  Masakazu SENGOKU  Shi-Ming LIN  

IEICE TRANSACTIONS on Communications   Vol.E82-B    No.1    pp.174-183
Publication Date: 1999/01/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Electronic and Radio Applications
radar polarimetry,  remote sensing,  scattering matrix,  polarization,  optimization,  

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This paper proposes two numerical methods to solve the optimal problem of contrast enhancement in the cross-pol and co-pol channels. For the cross-pol channel case, the contrast (power ratio) is expressed in a homogeneous form, which leads the polarimetric contrast optimization to a distinctive eigenvalue problem. For the co-pol channel case, this paper proposes a cross iterative method for optimization, based on the formula used in the matched-pol channel. Both these numerical methods can be proved as convergent algorithms, and they are effective for obtaining the optimum polarization state. Besides, one of the proposed methods is applied to solve the optimal problem of contrast enhancement for the time-independent targets case. To verify the proposed methods, this paper provides two numerical examples. The results of calculation are completely identical with other authors', showing the validity of the proposed methods.