Reduction of Surface Clutter by a Polarimetric FM-CW Radar in Underground Target Detection

Toshifumi MORIYAMA  Yoshio YAMAGUCHI  Hiroyoshi YAMADA  Masakazu SENGOKU  

Publication
IEICE TRANSACTIONS on Communications   Vol.E78-B    No.4    pp.625-629
Publication Date: 1995/04/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Electromagnetic Compatibility
Keyword: 
radio applications,  sub-surface radar,  polarimetry,  SAR,  

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Summary: 
This paper presents an experimental result of polarimetric detection of objects buried in a sandy ground by a synthetic aperture FM-CW radar. Emphasis is placed on the reduction of surface clutter by the polarimetric radar, which takes account of full polarimetric scattering characteristics. First, the principle of full polarimetric imaging methodology is outlined based on the characteristic polarization states for a specific target together with a polarimetric enhancement factor which discriminates desired and undesired target echo. Then, the polarimetric filtering technique which minimizes a surface reflection is applied to detect a thin metallic plate embedded in a sandy ground, demonstrating the potential capability of reducing surface clutter which leads to an improvement of underground radar performance, and validating the usefulness of FM-CW radar polarimetry.