The Space-Variant Phase-Error Matching Map-Drift Algorithm for Highly Squinted SAR
In highly squinted synthetic aperture radar (SAR) motion compensation, the map-drift (MD) algorithm cannot estimate the Doppler chirp rate accurately when the range walk is compensated in the azimuthal time domain. This problem stems from the influence of the azimuthal position-dependent (i.e., spac...
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| Published in | IEEE geoscience and remote sensing letters Vol. 10; no. 4; pp. 845 - 849 |
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| Main Authors | , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Piscataway
IEEE
01.07.2013
The Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
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| Online Access | Get full text |
| ISSN | 1545-598X 1558-0571 |
| DOI | 10.1109/LGRS.2012.2226139 |
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| Abstract | In highly squinted synthetic aperture radar (SAR) motion compensation, the map-drift (MD) algorithm cannot estimate the Doppler chirp rate accurately when the range walk is compensated in the azimuthal time domain. This problem stems from the influence of the azimuthal position-dependent (i.e., space-variant) phases, which are introduced by the compensation of the range walk in the azimuthal time domain on the Doppler chirp rate estimation. This letter proposes a space-variant phase-error matching MD algorithm that can improve the precision of estimating the Doppler chirp rate for the highly squinted SAR by removing the influence of the azimuthal position-dependent phases. |
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| AbstractList | In highly squinted synthetic aperture radar (SAR) motion compensation, the map-drift (MD) algorithm cannot estimate the Doppler chirp rate accurately when the range walk is compensated in the azimuthal time domain. This problem stems from the influence of the azimuthal position-dependent (i.e., space-variant) phases, which are introduced by the compensation of the range walk in the azimuthal time domain on the Doppler chirp rate estimation. This letter proposes a space-variant phase-error matching MD algorithm that can improve the precision of estimating the Doppler chirp rate for the highly squinted SAR by removing the influence of the azimuthal position-dependent phases. |
| Author | Bo Zhang Mengdao Xing Yu Tang Liang Guo Zheng Bao |
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| Cites_doi | 10.1109/7.481254 10.1109/36.536528 10.1109/7.78293 10.1109/TGRS.2010.2102040 10.1109/36.581976 10.1109/36.298008 10.1109/TGRS.2009.2015657 |
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| Snippet | In highly squinted synthetic aperture radar (SAR) motion compensation, the map-drift (MD) algorithm cannot estimate the Doppler chirp rate accurately when the... |
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| SubjectTerms | Algorithms Azimuth Chirp Compensation Doppler Doppler effect Estimation Highly squinted synthetic aperture radar (SAR) map drift (MD) Matching Phases Signal processing algorithms space-variant phases Synthetic aperture radar Time domain Time domain analysis |
| Title | The Space-Variant Phase-Error Matching Map-Drift Algorithm for Highly Squinted SAR |
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