Wavenumber-domain Imaging Algorithm for High Squint SAR Based on Azimuth Variation Range Model

DONG Qi; YANG Zemin; LI Zhenyu; SUN Guangcai; XING Mengdao

doi:10.11999/JEIT160785

Volume 38 Issue 12

Jan. 2017

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Article Navigation > Journal of Electronics & Information Technology > 2016 > 38(12): 3166-3173

DONG Qi, YANG Zemin, LI Zhenyu, SUN Guangcai, XING Mengdao. Wavenumber-domain Imaging Algorithm for High Squint SAR Based on Azimuth Variation Range Model[J]. Journal of Electronics & Information Technology, 2016, 38(12): 3166-3173. doi: 10.11999/JEIT160785

Citation:

DONG Qi, YANG Zemin, LI Zhenyu, SUN Guangcai, XING Mengdao. Wavenumber-domain Imaging Algorithm for High Squint SAR Based on Azimuth Variation Range Model[J]. Journal of Electronics & Information Technology, 2016, 38(12): 3166-3173. doi: 10.11999/JEIT160785

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Wavenumber-domain Imaging Algorithm for High Squint SAR Based on Azimuth Variation Range Model

doi: 10.11999/JEIT160785

Funds:

The National Natural Science Foundation of China (61301292), The AeroSpace T.T. C. Innovation Program (201509A)

Received Date: 2016-07-22
Rev Recd Date: 2016-11-24
Publish Date: 2016-12-19

Abstract

Abstract

Due to the acceleration in the moving of the platform, the SAR imaging of highly squinted maneuvering platform becomes a problem to be solved urgently. The majority of currently existing range models fail in taking the azimuth-variation into consideration, so the well-focused images are not obtained. To solve these problems, a new azimuth-variation range model under the non-linear trajectory caused by acceleration is constructed. Based on this model, a wavenumber-domain imaging algorithm for high squint SAR is proposed, which takes advantage of the azimuth-variation filter to remove the azimuth chirp rate changes and Doppler center changes caused by the acceleration. By the analysis of the model error, the precision of the model is confirmed. Contrast simulation results are presented to valid the superiority of the proposed approach.
- Synthetic Aperture Radar (SAR),
- High squint,
- Azimuth variation,
- Range model

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References(24)

References

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