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Extension of Range Migration Algorithm to Squint Circular SAR Imaging | IEEE Journals & Magazine | IEEE Xplore

Extension of Range Migration Algorithm to Squint Circular SAR Imaging


Abstract:

This letter presents a new algorithm for squint circular synthetic aperture radar (SAR) (CSAR) imaging, which is an extension of the well-known range migration algorithm....Show More

Abstract:

This letter presents a new algorithm for squint circular synthetic aperture radar (SAR) (CSAR) imaging, which is an extension of the well-known range migration algorithm. Due to the circular trajectory, the spatial frequency domain data of squint CSAR cannot be readily obtained via fast Fourier transform, as conventional SAR with straight path does. This method first employs along-track varying system kernels and filters to transform the raw data to the polar spatial frequency domain. Then, it uses an interpolation algorithm to convert the polar samples into rectilinear samples. Implementation aspects, including sampling criteria, resolutions, and computational complexity, are also assessed in this letter. The proposed algorithm is validated both numerically and experimentally.
Published in: IEEE Geoscience and Remote Sensing Letters ( Volume: 8, Issue: 4, July 2011)
Page(s): 651 - 655
Date of Publication: 24 January 2011

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