Wavefront curvature correction in one stationary bistatic SAR image focused via PFA

Wang, X.; Zhu, Daiyin

doi:10.1049/el.2010.1350

Cited by 7 publications

(2 citation statements)

References 8 publications

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“…In papers by Wang and Zhu [17,18] they develop a Taylor series expansion of the differential range phase for bistatic radar geometry. The bistatic development follows Doren's SVPF [7] algorithm through constructing the phase corrections and implementing the corrections on the image via chips [17].…”

Section: Wavefront Curvature For Bistatic Sarmentioning

confidence: 99%

Polar format algorithm : survey of assumptions and approximations.

Musgrove¹

2012

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Section: Wavefront Curvature For Bistatic Sarmentioning

confidence: 99%

Polar format algorithm : survey of assumptions and approximations.

Musgrove¹

2012

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“…Non-uniform interpolation and resampling are adopted in [2] when converting raw data from polar coordinates to Cartesian coordinates in spatial frequency space. A space-variant filtering method for wavefront curvature correction is proposed in [3], which extends the focused scene size. The first result of real bistatic SAR data processed by conventional PFA is presented in [4].…”

Section: Introductionmentioning

confidence: 99%

Bistatic Polar Format Algorithm Based on Wavenumber Vector

Shi

Peng

et al. 2015

AMM

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The paper concentrates on bistatic polar format algorithm (PFA) for focusing the spotlight bistatic Synthetic aperture radar (SAR) data. Exploring the imaging geometry of spotlight mode, a wavenumber vector Kbis derived according to the original definition of wavenumber. The direction of the vector Kb corresponds to the path from the transmitter to the target in the scene to the receiver in the bistatic SAR configuration. Using the vector Kb, a point target position vector in the scene can be expressed as the same form as that of conventional monostatic spotlight SAR. Based on the vector Kb, the spotlight bistatic PFA is derived and is presented concisely. In the simulation experiments, the presented PFA and BP algorithm process the same area target respectively. The result of the experiments show the PFA mentioned in this paper is valid. The quality of the processing result achieved by the PFA is not worse than that by BP algorithm.

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A Generalized Wavefront-Curvature-Corrected Polar Format Algorithm to Focus Bistatic SAR Under Complicated Flight Paths

Miao

et al. 2020

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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Bistatic SAR (BiSAR) imaging is faced with two major challenges: large scene imaging and adaptability to unideal platform motion in practice. In order to deal with these two problems, a generalized wavefront-curvature-corrected polar format algorithm (PFA) is proposed in this paper. The traditional PFA has little restrict on geometry configuration and platform motion, but its application to large scene imaging is limited by the far-field planar wavefront assumption. To solve this limitation, this paper derives the phase error caused by wavefront curvature and analyzes its influence on both geometric distortion and defocusing effect in detail. Based on the analysis, we present a wavefront curvature completely-correcting method through space-variant phase compensation using the analytical wavefront curvature phase in wavenumber-domain, which is derived through Method of Series Reversion. Whats more, an efficient realization of the space-variant phase compensation based on two-stage image division is given to avoid high overlap rate in the traditional image division method. The proposed method can obtain well focused and geometric undistorted image for BiSAR under complicated flight paths, and it also keeps the logarithmic complexity of traditional PFA. The effectiveness of the proposed method is verified by numerical simulations.

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Wavefront curvature correction in one stationary bistatic SAR image focused via PFA

Cited by 7 publications

References 8 publications

Polar format algorithm : survey of assumptions and approximations.

Polar format algorithm : survey of assumptions and approximations.

Bistatic Polar Format Algorithm Based on Wavenumber Vector

A Generalized Wavefront-Curvature-Corrected Polar Format Algorithm to Focus Bistatic SAR Under Complicated Flight Paths

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