New applications of nonlinear chirp scaling in SAR data processing
New applications of nonlinear chirp scaling in SAR data processing
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DOI：
10.1109/36.921412
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发表时间：
2001-05-01
影响因子：
8.2
通讯作者：
Yeo, TS
中科院分区：
文献类型：
--
作者：
Wong, FH;Yeo, TS
非线性调频定标（NLCS）在处理条带模式下的单基地和双基地SAR数据中有着新的应用。当距离二次徙动对短波长雷达脉冲响应展宽的影响可以忽略不计时，可以采用时域距离单元徙动校正（RCMC）。在方位压缩前，对每个距离门施加一个非线性啁啾扰动函数，以均衡目标的调频速率。文中对该算法进行了分析，并通过点目标仿真实验验证了该算法的有效性。
New applications of nonlinear chirp scaling (NLCS) have been found in processing monostatic and bistatic SAR data acquired in the strip-map mode. When the effects in impulse response broadenings due to quadratic range migration are negligible for short radar wavelengths, a time domain range cell migration correction (RCMC) can be applied, After the correction, the FM rates of targets confined in a range gate will differ from each other. A nonlinear chirp perturbation function can be applied to each range gate to equalize the targets' FM rates before azimuth compression, This algorithm is analyzed in the paper and is supported by point target simulation experiments.