Matrix Pencil Method Based Processing Approach for Spaceborne MEB SAR with Digital Beamforming in Elevation

Kai YE; Weidong YU; Wei WANG

doi:10.11999/JEIT180076

Volume 40 Issue 11

Oct. 2018

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Article Navigation > Journal of Electronics & Information Technology > 2018 > 40(11): 2659-2666

Kai YE, Weidong YU, Wei WANG. Matrix Pencil Method Based Processing Approach for Spaceborne MEB SAR with Digital Beamforming in Elevation[J]. Journal of Electronics & Information Technology, 2018, 40(11): 2659-2666. doi: 10.11999/JEIT180076

Citation:

Kai YE, Weidong YU, Wei WANG. Matrix Pencil Method Based Processing Approach for Spaceborne MEB SAR with Digital Beamforming in Elevation[J]. Journal of Electronics & Information Technology, 2018, 40(11): 2659-2666. doi: 10.11999/JEIT180076

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Matrix Pencil Method Based Processing Approach for Spaceborne MEB SAR with Digital Beamforming in Elevation

doi: 10.11999/JEIT180076

Kai YE^{1, 2
,
,},
Weidong YU^{1, 2},
Wei WANG¹

1.
Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Funds: The National Key Research and Development Project of China (2017YFB0502700), The National Natural Science Foundation of China (61701479)

Received Date: 2018-01-19
Rev Recd Date: 2018-05-10

Available Online: 2018-08-14

Publish Date: 2018-11-01

Abstract

Abstract

Digital BeamForming (DBF) in elevation plays a crucial role for spaceborne Multiple Elevation Beam (MEB) SAR realizing the High-Resolution Wide-Swath (HRWS) imaging mode. However, due to the influence of satellite attitude error, the deviation of the DBF receiving beam direction always arises in such system. This leads to ghost targets appearing in the SAR image, when mapping the scenes (such as the seaport areas) with strong scatterers. To address the problem, a matrix pencil method based DBF processing approach in elevation is presented. Firstly, according to the given threshold, the peak position of the strong scatterer is found from the range-compressed signals. Then, the direction of arrival angle of the strong scatterer is estimated using the matrix pencil method. Finally, based on the imaging geometry model, the DBF weighting vector is adjusted to ensure the receiving beam to precisely point to the signal sources. Thereby, the interferences of ghost targets in SAR image can be eliminated effectively. The theoretical analysis is derived in detail, then it is validated by simulation experiments.
- SAR,
- Multiple Elevation Beam (MEB),
- Digital BeamForming (DBF),
- Matrix pencil method

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References(25)

References

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