A new method for the compensation of the SAR range cell migration based on the chirp z-transform

Author

Lanari, Riccardo

Author_Institution

IRECE, CNR, Naples, Italy

Volume

33

Issue

5

fYear

1995

fDate

9/1/1995 12:00:00 AM

Firstpage

1296

Lastpage

1299

Abstract

Precision synthetic aperture radar (SAR) data processing requires the compensation of the range-dependent range cell migration (RDRCM) phenomenon. This paper describes a new method that permits the compensation of the RDRCM effect using a nonstandard Fourier transform (FT). This operation is applied, in the two-dimensional Fourier domain, to the range signal spectrum and allows the compensation of the azimuth frequency-dependent scaling factor due to the RDRCM. The nonstandard FT is performed via a chirp z-transform that is carried out with one convolution operation and two phase multiplications

Keywords

Fourier transforms; Z transforms; geophysical signal processing; geophysical techniques; radar imaging; remote sensing by radar; synthetic aperture radar; RDRCM; SAR imaging; SAR range cell migration; azimuth frequency-dependent scaling factor; chirp Z-transform; compensation method; convolution; data processing; geophysical measurement technique; image processing; land surface; nonstandard Fourier transform; phase multiplication; radar remote sensing; range-dependent range cell migration; synthetic aperture radar; terrain mapping; two-dimensional Fourier domain; Backscatter; Biomass; Chirp; Filtering; Radar remote sensing; Radar scattering; Remote sensing; Sun; Synthetic aperture radar; Vegetation mapping;

fLanguage

English

Journal_Title

Geoscience and Remote Sensing, IEEE Transactions on

Publisher

ieee

ISSN

0196-2892

Type

jour

DOI

10.1109/36.469496

Filename

469496