A Two Dimensional Autofocus Translation Compensation Method for Wide-angle ISAR Imaging

FU Jixiang; SUN Guangcai; XING Mengdao

doi:10.11999/JEIT170303

Volume 39 Issue 12

Dec. 2017

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Article Navigation > Journal of Electronics & Information Technology > 2017 > 39(12): 2889-2898

FU Jixiang, SUN Guangcai, XING Mengdao. A Two Dimensional Autofocus Translation Compensation Method for Wide-angle ISAR Imaging[J]. Journal of Electronics & Information Technology, 2017, 39(12): 2889-2898. doi: 10.11999/JEIT170303

Citation:

FU Jixiang, SUN Guangcai, XING Mengdao. A Two Dimensional Autofocus Translation Compensation Method for Wide-angle ISAR Imaging[J]. Journal of Electronics & Information Technology, 2017, 39(12): 2889-2898. doi: 10.11999/JEIT170303

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A Two Dimensional Autofocus Translation Compensation Method for Wide-angle ISAR Imaging

doi: 10.11999/JEIT170303

Funds:

The Major Research Plan of the National Natural Science Foundation of China (91438106), The Foundation for Innovative Research Groups of the National Natural Science Foundation of China (61621005)

Received Date: 2017-04-07
Rev Recd Date: 2017-07-11
Publish Date: 2017-12-19

Abstract

Abstract

For non-cooperative ISAR targets, the rotation motion and the translation motion are coupled under wide-angle circumstance, and it is hard to compensate the translation motion precisely. A two dimensional autofocus translation compensation method for wide-angle ISAR imaging is proposed. Firstly, the translation motion is compensated coarsely; then, two dimensional coupling between rotation and translation is decoupled through Polar Format Algorithm (PFA); finally, the error phase is extracted by autofocus algorithm and then the residual translation is estimated from the error phase. The proposed method can correct the envelope and phase errors simultaneously, and compared with traditional translation compensation methods, range alignment combining with autofocus, the proposed method has a higher precision; compared with the methods of optimization for jointing alignment and phase, the proposed method is more efficient. The experimental results using both simulated data and measured data collected in microwave chamber confirm the validation and practicality of the proposed algorithm.
- Inverse Synthetic Aperture Radar (ISAR),
- Wide-angle,
- Two dimensional autofocus,
- Translation compensation,
- High-precision,
- Efficient

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References(20)

References

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