AZIMUTH STACKING ALGORITHM FOR SYNTHETIC APERTURE RADAR IMAGING

Azimuth Stacking Algorithm for Synthetic Aperture Radar Imaging

The aim of this paper is to present a frequency domain method for synthetic aperture radar (SAR) imaging. By using two consecutive linear mappings along Doppler and frequency domains, an azimuth-dependent SAR transfer function has been discovered. Based on this new transfer function, the SAR image can be reconstructed by the proposed azimuth stacking algorithm. The new algorithm can form SAR im...

A Butterfly Algorithm for Synthetic Aperture Radar Imaging

In spite of an extensive literature on fast algorithms for synthetic aperture radar (SAR) imaging, it is not currently known if it is possible to accurately form an image from N data points in provable near-linear time complexity. This paper seeks to close this gap by proposing an algorithm which runs in complexity O(N logN log(1/ )) without making the far-field approximation or imposing the be...

Suppressing the azimuth ambiguities in synthetic aperture radar images

This paper proposes a method for removing the azimuth ambiguities from synthetic aperture radar ( S A R ) images. The basic idea is to generate a two-dimensional reference function for S A R processing which provides, in addition to the matched filtering for the unaliased part of the received signal, the deconvolution of the azimuth ambiguities. This approach corresponds to an ideal filter conc...

Coherent interferometric imaging for synthetic aperture radar

This paper shows that the coherent interferometric imaging strategy originally proposed in the context of passive or active arrays of antennas can be implemented for synthetic aperture radar, in which a single antenna is used as an emitter and as a receiver at successive positions along a trajectory. The idea is to backpropagate the cross correlations of the recorded signals over selected frequ...

Refocusing Algorithm for Synthetic Aperture Radar