A SAR Autofocus Algorithm for High Order Range Migration

Kazuhiko YAMAMOTO  Masafumi IWAMOTO  Yoshio KOSUGE 

Publication
B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)  Vol.J89-B  No.7  pp.1054-1062
Publication Date: 2006/07/01
Online ISSN: 1881-0209
Print ISSN: 1344-4697
Type of Manuscript: Special Section PAPER (Special Issue on Radio Application Technologies in Observation, Positioning and Detection)
Category: 
Keyword: 
radar,  SAR,  range alignment,  phase compensation,  autofocus, 

Full Text(in Japanese): PDF(1.2MB)

Summary: 
A synthetic aperture radar (SAR) imaging algorithm for decreasing even second order range migration is discussed. Since the range migration of the observed target degrades the image resolution, it must be accurately estimated and compensated in the image reconstructing process. In this paper, we propose a new motion estimation algorithm for high accelerated target using the phase variation of a scatterer. The reconstructed image of a scatterer is given to demonstrate the correctness and effectiveness of the proposed method.