Two-Dimensional Imaging of Ice Sheets of Airborne Radar Sounder via a Combined Modified Range Migration Algorithm Based on ISFT and Beamforming Using Curvelets
Two-Dimensional Imaging of Ice Sheets of Airborne Radar Sounder via a Combined Modified Range Migration Algorithm Based on ISFT and Beamforming Using Curvelets
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DOI：
10.1109/jstars.2014.2349500
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发表时间：
2015
影响因子：
5.5
通讯作者：
S. Lang;Bo Zhao;Xiaojun Liu;G. Fang
中科院分区：
文献类型：
--
作者：
S. Lang;Bo Zhao;Xiaojun Liu;G. Fang
提出并论证了一种解决机载雷达测深仪冰盖成像中地表杂波问题的新方法。该方法利用基于逆尺度傅里叶变换(ISFT)的改进距离迁移算法抑制航迹沿途杂波，利用曲线小波波束形成抑制航迹间杂波。首先，对所提出的方法进行了理论分析。然后，给出了实现该方法的具体实现步骤。最后，将该方法应用于模拟点目标和MCoRDS数据，验证了该方法对冰盖成像的有效性。此外，通过与两种方法在沿航迹杂波抑制能力、跨航迹杂波抑制能力、等效视线数(ENL)和计算时间四个主要方面的比较，证明了该方法的优越性。
We develop and demonstrate a new method to address the surface clutter problem in imaging of ice sheets by airborne radar sounder. This new method utilizes the modified range migration algorithm based on inverse scaled Fourier transform (ISFT) to reduce along-track clutter and the beamforming using curvelets to reduce cross-track clutter. First, theory analysis has been carried on to the proposed method. Then, we give the particular realizing steps to implement this method. At last, we apply this method to the simulation point targets and MCoRDS data to prove its validity of imaging of ice sheets. Furthermore, we show the advantages of the proposed method through comparison with two methods in four major aspects-the power of along-track clutter reduction, the power of cross-track clutter reduction, the equivalent number of looks (ENLs), and the calculating time.