Minimum Entropy via Subspace for ISAR Autofocus

被引：53

作者：

Cao, Pan ^{[1
]}

Xing, Mengdao ^{[1
]}

Sun, Guangcai ^{[1
]}

Li, Yachao ^{[1
]}

Bao, Zheng ^{[1
]}

机构：

[1] Xidian Univ, Key Lab Radar Signal Proc, Xian 710071, Peoples R China

来源：

IEEE GEOSCIENCE AND REMOTE SENSING LETTERS | 2010年 / 7卷 / 01期

关键词：

Array manifold; autofocus; inverse synthetic aperture radar (ISAR); minimum entropy; signal subspace; TARGET;

D O I：

10.1109/LGRS.2009.2031658

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

In this letter, a novel approach to autofocus for inverse synthetic aperture radar (ISAR) imaging called minimum entropy via subspace autofocus is presented. This scheme uses the weighted signal subspace to express the phase errors left in the echoes after range-bin alignment and estimates the optimal weights sequentially via an optimization algorithm based on an entropy minimization principle, and its robustness and convergence can be ensured by the optimization method. Both the theoretical analysis and processing results of the real ISAR data have confirmed the feasibility of this new scheme.

引用

页码：205 / 209

页数：5

共 15 条

[1]

BAO Z, 2005, RADAR IMAGING TECHNI, P243

[2]

Bao Zheng, 1996, Acta Electronica Sinica, V24, P74

[3] Autofocusing of inverse synthetic aperture radar images using contrast optimization [J].

Berizzi, F ;

Corsini, G .

IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS, 1996, 32 (03) :1185-1191

[4] TARGET-MOTION-INDUCED RADAR IMAGING [J].

CHEN, CC ;

ANDREWS, HC .

IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS, 1980, 16 (01) :2-14

[5] Motion compensation for ISAR via centroid tracking [J].

Itoh, T ;

Sueda, H ;

Watanabe, Y .

IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS, 1996, 32 (03) :1191-1197

[6] IMPROVED ADAPTIVE-BEAMFORMING TARGET FOR SELF-CALIBRATING A DISTORTED PHASED-ARRAY [J].

KANG, B ;

SUBBARAM, HM ;

STEINBERG, BD .

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 1990, 38 (02) :186-194

[7]

PRICKETT MJ, 1980, PRINCIPLES INVERSE S, P340

[8] ROBUST RANGE ALIGNMENT ALGORITHM VIA HOUGH TRANSFORM IN AN ISAR IMAGING-SYSTEM [J].

SAUER, T ;

SCHROTH, A .

IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS, 1995, 31 (03) :1173-1177

[9] MICROWAVE IMAGING OF AIRCRAFT [J].

STEINBERG, BD .

PROCEEDINGS OF THE IEEE, 1988, 76 (12) :1578-1592

[10] PHASE GRADIENT AUTOFOCUS - A ROBUST TOOL FOR HIGH-RESOLUTION SAR PHASE CORRECTION [J].

WAHL, DE ;

EICHEL, PH ;

GHIGLIA, DC ;

JAKOWATZ, CV .

IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS, 1994, 30 (03) :827-835

← 1 2 →