A Frequency-domain Algorithm Based on Local Cartesian Coordinate and Subregion Processing for Missile-borne SAR Imaging

BIE Bowen; SUN Lu; XING Mengdao; LIANG Yi; SUN Guangcai

doi:10.11999/JEIT171107

Volume 40 Issue 8

Aug. 2018

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Article Navigation > Journal of Electronics & Information Technology > 2018 > 40(8): 1779-1786

BIE Bowen, SUN Lu, XING Mengdao, LIANG Yi, SUN Guangcai. A Frequency-domain Algorithm Based on Local Cartesian Coordinate and Subregion Processing for Missile-borne SAR Imaging[J]. Journal of Electronics & Information Technology, 2018, 40(8): 1779-1786. doi: 10.11999/JEIT171107

Citation:

BIE Bowen, SUN Lu, XING Mengdao, LIANG Yi, SUN Guangcai. A Frequency-domain Algorithm Based on Local Cartesian Coordinate and Subregion Processing for Missile-borne SAR Imaging[J]. Journal of Electronics & Information Technology, 2018, 40(8): 1779-1786. doi: 10.11999/JEIT171107

Citation:

BIE Bowen, SUN Lu, XING Mengdao, LIANG Yi, SUN Guangcai. A Frequency-domain Algorithm Based on Local Cartesian Coordinate and Subregion Processing for Missile-borne SAR Imaging[J]. Journal of Electronics & Information Technology, 2018, 40(8): 1779-1786. doi: 10.11999/JEIT171107

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A Frequency-domain Algorithm Based on Local Cartesian Coordinate and Subregion Processing for Missile-borne SAR Imaging

doi: 10.11999/JEIT171107

Funds:

The National Natural Science Foundation of China (61621005), The High Resolution Earth Observation System major Project (41-Y20A13-9001-15116)

Received Date: 2017-11-24
Rev Recd Date: 2018-04-16
Publish Date: 2018-08-19

Abstract

Abstract

The missile-borne SAR platform has the characteristics of nonlinear trajectory and high-squint mode. A frequency-domain imaging algorithm based on local Cartesian coordinate and subregion processing is proposed. For high-squint mode, the range model is built in local Cartesian coordinate to match accurately the azimuth signal after range walk correction. To compensate the azimuth-dependent range cell migration and Doppler parameters accurately, the imaging area is divided into several subregions. The final focused image can be obtained when all the subregion images are interpolated uniformly into the ground coordinate. Finally, the point targets simulation and real SAR data verify the effectiveness of the proposed algorithm.
- SAR,
- Local Cartesian coordinate,
- Subregion processing,
- Nonlinear trajectory,
- High-squint

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References(16)

References

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