An analytical expression of the phase error from wavefront curvature in bistatic spotlight-mode synthetic aperture radar (SAR) image reconstructed via polar format algorithm (PFA) is derived in this paper. The wavefront curvature effect, which arises from the unrealistic planar wavefront assumption in bistatic PFA, induces phase error terms resulting in space-variant geometry distortion and defocusing. Based on the analytical expression of the wavefront curvature error, a space-variant filtering approach is applied to compensate for it in the polar formatted bistatic SAR image. Analysis on the scene size limit after using the correction method indicates that the derived space-variant filter is capable of extending the focused scene size of bistatic PFA considerably. Point target (PT) simulation validates the approach.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Space-Variant Filtering for Wavefront Curvature Correction in Polar Formatted Bistatic SAR Image


    Contributors:
    Xin Wang (author) / Daiyin Zhu (author) / Xinhua Mao (author) / Zhaoda Zhu (author)


    Publication date :

    2012-04-01


    Size :

    1863529 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Image-based wavefront correction for space telescopes

    Kazasidis, Orestis / Verpoort, Sven / Wittrock, Ulrich | British Library Conference Proceedings | 2019


    Polar Format Algorithm for Bistatic SAR

    Rigling, B.D. | Online Contents | 2004


    TAXI Interface Demultiplexes Proprietarily Formatted Data

    Newnan, Bruce G. / Ahiport, Steven F. | NTRS | 2001


    Polar format algorithm for bistatic SAR

    Rigling, B.D. / Moses, R.L. | IEEE | 2004


    Focusing highly squinted Azimuth variant Bistatic SAR

    Dong Li / Wei Wang / Hongqing Liu et al. | IEEE | 2016