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

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. >

[1]  Michael Y. Jin,et al.  A SAR correlation algorithm which accommodates large-range migration , 1984, IEEE Transactions on Geoscience and Remote Sensing.

[2]  R. Horn,et al.  E-sar - The Experimental Airborne L/c-band Sar System Of DFVLR , 1988, International Geoscience and Remote Sensing Symposium, 'Remote Sensing: Moving Toward the 21st Century'..

[3]  R. Keith Raney,et al.  Precision SAR processing using chirp scaling , 1994, IEEE Trans. Geosci. Remote. Sens..

[4]  G. Franceschetti,et al.  A new two-dimensional squint mode SAR processor , 1996, IEEE Transactions on Aerospace and Electronic Systems.

[5]  F. Rocca,et al.  SAR data focusing using seismic migration techniques , 1991 .

[6]  L. Rabiner,et al.  The chirp z-transform algorithm and its application , 1969 .

[7]  A. M. Smith,et al.  A new approach to range-Doppler SAR processing , 1991 .

[8]  Alberto Moreira,et al.  Airborne SAR processing of highly squinted data using a chirp scaling approach with integrated motion compensation , 1994, IEEE Trans. Geosci. Remote. Sens..

[9]  Richard Bamler,et al.  A comparison of range-Doppler and wavenumber domain SAR focusing algorithms , 1992, IEEE Trans. Geosci. Remote. Sens..

[10]  S. Buckreuß.  Motion Compensation for the Experimental SAR System of the DLR , 1994 .

[11]  V. Pascazio,et al.  WASAR: a wide-angle SAR processor , 1992 .

[12]  R. Bamler,et al.  A Novel High Precision SAR Focussing Algorithm Based On Chirp Scaling , 1992, [Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium.

[13]  R. Stolt.  MIGRATION BY FOURIER TRANSFORM , 1978 .