A 2-D re-focusing algorithm for spotlight UAV SAR imagery

Weidi Xu; Xiaoliang Yang; Pengjie You; Lin Wang; Yewei Xia; Shuo Feng

doi:10.1117/12.3004855

20 October 2023 A 2-D re-focusing algorithm for spotlight UAV SAR imagery

Weidi Xu, Xiaoliang Yang, Pengjie You, Lin Wang, Yewei Xia, Shuo Feng

Proceedings Volume 12916, Third International Conference on Signal Image Processing and Communication (ICSIPC 2023); 129160T (2023) https://doi.org/10.1117/12.3004855
Event: Third International Conference on Signal Image Processing and Communication (ICSIPC 2023), 2023, Kunming, China

Abstract

Unmanned aerial vehicle (UAV) synthetic aperture radar (SAR) is an efficient remote sensing system. It has been used widely in both the military field and civilian field. However, when it works in spotlight mode, the accumulated motion errors can be heavy over the long synthetic time, inevitably causing two-dimensional (2-D) defocus. In this paper, a novel two-step autofocus algorithm based on the coarse imaging result is developed. The estimation of azimuth as well as range error is operated in the range-compress azimuth-frequency domain and the compensation is completed with the 2-D frequency spectrum correction. Simulation experiments verified the effectiveness of the proposed method.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Weidi Xu, Xiaoliang Yang, Pengjie You, Lin Wang, Yewei Xia, and Shuo Feng "A 2-D re-focusing algorithm for spotlight UAV SAR imagery", Proc. SPIE 12916, Third International Conference on Signal Image Processing and Communication (ICSIPC 2023), 129160T (20 October 2023); https://doi.org/10.1117/12.3004855

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