ISAR motion compensation using modified Doppler centroid tracking method

Author

Zhu, Zhaoda ; Qiu, Xiaohui ; She, Zhishun

Author_Institution

Dept. of Electron. Eng., Nanjing Univ. of Aeronaut. & Astron., China

Volume

1

fYear

1996

fDate

20-23 May 1996

Firstpage

359

Abstract

With regard to the phase compensation in inverse synthetic aperture radar (ISAR), the modified Doppler centroid tracking (MDCT) method is developed which applies the phase gradient autofocus (PGA) algorithm developed by Wahl (1994) to improve the Doppler centroid tracking (DCT) method. When the phase compensation is performed, the proposed approach smartly eliminates the effect of the rotational phase component (RPC) on the estimation of the translational phase component (TPC) by circular shifting, windowing and iteration steps. After several iterations, the maximum likelihood estimation and compensation of the TPC of the target can be realized more effectively. The processing results of live data show that the proposed method can improve the imaging quality of ISAR significantly

Keywords

Doppler radar; image resolution; iterative methods; maximum likelihood estimation; motion compensation; phase estimation; radar computing; radar cross-sections; radar imaging; radar signal processing; radar tracking; synthetic aperture radar; ISAR motion compensation; circular shifting; frequency domain method; imaging quality; iteration steps; maximum likelihood estimation; modified Doppler centroid tracking method; phase compensation; phase gradient autofocus algorithm; range realignment; rotational phase component effect elimination; translational phase component; windowing; Discrete cosine transforms; Doppler radar; Electronics packaging; Inverse synthetic aperture radar; Maximum likelihood estimation; Motion compensation; Phase estimation; Radar imaging; Radar scattering; Radar tracking;

fLanguage

English

Publisher

ieee

Conference_Titel

Aerospace and Electronics Conference, 1996. NAECON 1996., Proceedings of the IEEE 1996 National

Conference_Location

Dayton, OH

ISSN

0547-3578

Print_ISBN

0-7803-3306-3

Type

conf

DOI

10.1109/NAECON.1996.517674

Filename

517674