Time-frequency approaches to ISAR imaging of maneuvering targets and their limitations

Author

Zheng Bao ; Changyin Sun ; Mengdao Xing

Author_Institution

Key Lab. of Radar Signal Processing, Xidian Univ., Xi´an

Volume

37

Issue

3

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

1091

Lastpage

1099

Abstract

Inverse synthetic aperture radar (ISAR) imaging of the noncooperative maneuvering target is a challenging task because of its time variant orientation and rotation velocity which cannot be measured accurately. This correspondence investigates the principles of ISAR imaging of maneuvering targets, and proposes an algorithm for application in situations where the maneuverability is not too severe and the Doppler variation of subechoes from scatterers can be approximated as a first-order polynomial. The imaging results obtained by using real data show the effectiveness of the new method

Keywords

Doppler radar; convergence of numerical methods; fast Fourier transforms; iterative methods; motion compensation; parameter estimation; polynomial approximation; radar imaging; radar tracking; synthetic aperture radar; target tracking; time-frequency analysis; Doppler radar; Doppler variation; FFT; ISAR imaging; convergence; extended weighted RELAX algorithm; first-order polynomial; iteration; maneuvering targets; motion compensation; noncooperative target; parameter estimation; scatterer subechoes; simplified tomographic framework; time variant orientation; time-frequency approaches; timed variant rotation velocity; Discrete Fourier transforms; Electromagnetic scattering; Equations; History; Inverse synthetic aperture radar; Lagrangian functions; Motion compensation; Radar scattering; Radar tracking; Time frequency analysis;

fLanguage

English

Journal_Title

Aerospace and Electronic Systems, IEEE Transactions on

Publisher

ieee

ISSN

0018-9251

Type

jour

DOI

10.1109/7.953260

Filename

953260