An Algorithm Based on Spectrum Shift for Improving Range Resolution Using GEO Spaceborne/Airborne Multistatic SAR
Zheng Jing-bo①② Song Hong-jun① Shang Xiu-qin①② Wu Yong①②
①(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China) ②(Graduate University of Chinese Academy of Sciences, Beijing 100039, China)
Abstract:In this paper, the GEO spaceborne/airborne multistatic SAR geometry model with one fixed transmitter and multiple receivers is proposed, and the spectrum shift between different receiver echoes is derived. Based on the spectrum shift, a new algorithm for improving range resolution of this model by composing spectrums of different receivers is proposed. The overlapped interference term, which is induced during spectrum composing, and its influence on range resolution, is analyzed in detail, and a method by weight filtering is provided to remove the interference term. Finally, simulation is employed to test validity of the algorithm.
郑经波, 宋红军, 尚秀芹, 吴勇. 基于频谱偏移的GEO星机多基SAR提高距离分辨率方法[J]. 电子与信息学报, 2010, 32(8): 1863-1868.
Zheng Jing-Bo, Song Hong-Jun, Sang Xiu-Qin, Wu Yong. An Algorithm Based on Spectrum Shift for Improving Range Resolution Using GEO Spaceborne/Airborne Multistatic SAR. , 2010, 32(8): 1863-1868.