Investigation on High Precision Sub-band Synthesizing and Processing Method for Very-high-resolution Airborne SAR

WANG Pei; WANG Xiangyu; LI Ning; YU Weidong; WANG Robert

doi:10.11999/JEIT170093

Volume 39 Issue 10

Oct. 2017

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WANG Pei, WANG Xiangyu, LI Ning, YU Weidong, WANG Robert. Investigation on High Precision Sub-band Synthesizing and Processing Method for Very-high-resolution Airborne SAR[J]. Journal of Electronics & Information Technology, 2017, 39(10): 2325-2331. doi: 10.11999/JEIT170093

Citation:

WANG Pei, WANG Xiangyu, LI Ning, YU Weidong, WANG Robert. Investigation on High Precision Sub-band Synthesizing and Processing Method for Very-high-resolution Airborne SAR[J]. Journal of Electronics & Information Technology, 2017, 39(10): 2325-2331. doi: 10.11999/JEIT170093

Citation:

WANG Pei, WANG Xiangyu, LI Ning, YU Weidong, WANG Robert. Investigation on High Precision Sub-band Synthesizing and Processing Method for Very-high-resolution Airborne SAR[J]. Journal of Electronics & Information Technology, 2017, 39(10): 2325-2331. doi: 10.11999/JEIT170093

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Investigation on High Precision Sub-band Synthesizing and Processing Method for Very-high-resolution Airborne SAR

doi: 10.11999/JEIT170093

1.
2.
(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)

Received Date: 2017-01-23
Rev Recd Date: 2017-07-07
Publish Date: 2017-10-19

Abstract

Abstract

The past decades have witnessed an increasing attention for detailed observation with developing of Synthetic Aperture Radar (SAR). The higher the resolutions of SAR images are, the more detailed information can be obtained from the images. At the present stage, the stepped frequency chirp signal waveform is a technology with high practicality to achieve the high range resolution imaging. The system can use the stepped frequency relationships between sub-band signals and then the sub-band synthesizing technique is applied to synthesize a large bandwidth signal. However, the sub-band synthesizing technique is very sensitive to the baseband signal error. A signal pre-distortion scheme is firstly proposed based on regression and statistics in this manuscript. After compensating the error in sub-band, the problems of errors between sub-bands are transformed into a multi-variable optimization problem. Finally, the effectiveness of the proposed method is verified by the X band airborne SAR system.
- Synthetic Aperture Radar (SAR),
- Ultra high-resolution image,
- Sub-band synthesizing technique,
- Amplitude and phase error

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References(26)

References

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