Image and Signal Processing Methods

Azimuth-range decouple-based L1 regularization method for wide ScanSAR imaging via extended chirp scaling

[+] Author Affiliations
Hui Bi

Institute of Electronics, Science and Technology on Microwave Imaging Laboratory, Chinese Academy of Sciences, No. 19, North 4th Ring Road West, Haidian District, Beijing 100190, China

University of Chinese Academy of Sciences, No. 19, Yu Quan Road, Beijing 100049, China

Bingchen Zhang, Wen Hong

Institute of Electronics, Science and Technology on Microwave Imaging Laboratory, Chinese Academy of Sciences, No. 19, North 4th Ring Road West, Haidian District, Beijing 100190, China

XiaoXiang Zhu

Remote Sensing Technology Institute, German Aerospace Center (DLR), Munchener Straße 20, Wessling 82234, Germany

Technical University of Munich, Signal Processing in Earth Observation, Arcisstraße 21, Munich 80333, Germany

J. Appl. Remote Sens. 11(1), 015007 (Jan 24, 2017). doi:10.1117/1.JRS.11.015007
History: Received July 31, 2016; Accepted December 27, 2016
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Abstract.  In this paper, we proposed an azimuth-range decouple-based L1 regularization method for wide ScanSAR imaging via extended chirp scaling (ECS) and applied it to the TerraSAR-X data to achieve large-scale sparse reconstruction. Compared with ECS, the conventional ScanSAR imaging algorithm based on matched filtering, the proposed method can improve the synthetic aperture radar image performance with full-sampling raw data for not only sparse but also nonsparse surveillance regions. It can also achieve high-resolution imaging for sparse considered scenes efficiently using down-sampling raw data. Compared with a typical L1 regularization imaging approach, which requires transfer of the two-dimensional (2-D) echo data into a vector and reconstruction of the scene via 2-D matrix operation, our proposed method has less computational cost and hence makes the large-scale regularization reconstruction of considered area become possible. The experimental results via real data validate the effectiveness of the proposed method.

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Citation

Hui Bi ; Bingchen Zhang ; XiaoXiang Zhu and Wen Hong
"Azimuth-range decouple-based L1 regularization method for wide ScanSAR imaging via extended chirp scaling", J. Appl. Remote Sens. 11(1), 015007 (Jan 24, 2017). ; http://dx.doi.org/10.1117/1.JRS.11.015007


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