ISAR image reconstruction and autofocusing procedure over phase modulated signals

Author

Lazarov, A.D. ; Minchev, Ch.N.

Author_Institution

Artillery & Air-Defence Mil. Acad., Bulgaria

fYear

2002

fDate

15-17 Oct. 2002

Firstpage

536

Lastpage

541

Abstract

A model of inverse synthetic aperture radar (ISAR) signal with Barker´s code phase modulation (PCM) is developed. To cope with the image blurring due to the range migration of object´s point scatterers an autofocusing technique for ISAR signal processing is performed. The correlation algorithm for range compression and spectral fast Fourier transform (FFT) for azimuth compression are exploited. The presented image reconstruction procedures are invariant to the object´s trajectory parameters. Numerical experiment over the simulated ISAR data is accomplished.

Keywords

correlation methods; electromagnetic wave scattering; fast Fourier transforms; focusing; image motion analysis; image reconstruction; image restoration; modulation coding; phase modulation; radar imaging; spectral analysis; synthetic aperture radar; Barker´s code phase modulation; FFT; ISAR image reconstruction; ISAR signal processing; PCM; autofocusing; azimuth compression; correlation algorithm; image blurring; inverse synthetic aperture radar; phase modulated signals; point scatterers; radar surveillance; range compression; rectilinear motion; simulated ISAR data; spectral fast Fourier transform; trajectory parameters; Fast Fourier transforms; Image coding; Image reconstruction; Inverse problems; Inverse synthetic aperture radar; Phase change materials; Phase modulation; Radar scattering; Radar signal processing; Signal processing algorithms;

fLanguage

English

Publisher

iet

Conference_Titel

RADAR 2002

Conference_Location

Edinburgh, UK

ISSN

0537-9989

Print_ISBN

0-85296-750-0

Type

conf

DOI

10.1109/RADAR.2002.1174776

Filename

1174776