Modified Doppler centroid tracking method for phase compensation in ISAR

Author

ZhaoDa, Zhu ; Xiaohui, Qiu ; Zhishun, She

Author_Institution

Nanjing Univ. of Aeronaut. & Astronaut., China

fYear

1996

fDate

8-10 Oct 1996

Firstpage

751

Lastpage

754

Abstract

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 for the phase compensation in inverse synthetic aperture radar (ISAR). It can smartly eliminate 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; inverse problems; iterative methods; maximum likelihood estimation; motion compensation; phase estimation; radar imaging; radar tracking; synthetic aperture radar; ISAR imaging; circular shifting; imaging quality; inverse synthetic aperture radar; iteration; maximum likelihood estimation; modified Doppler centroid tracking method; phase compensation; phase gradient autofocus algorithm; rotational phase component; translational phase component; windowing; Discrete cosine transforms; Doppler radar; Electronics packaging; High-resolution imaging; Motion compensation; Phase estimation; Radar imaging; Radar scattering; Radar tracking; Target tracking;

fLanguage

English

Publisher

ieee

Conference_Titel

Radar, 1996. Proceedings., CIE International Conference of

Conference_Location

Beijing

Print_ISBN

0-7803-2914-7

Type

conf

DOI

10.1109/ICR.1996.574604

Filename

574604