| ISAR运动参数估计和补偿改进方法 |
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| 引用本文： | 张晓玲,黄书伟,郭少南. ISAR运动参数估计和补偿改进方法[J]. 电子科技大学学报(自然科学版), 2008, 37(3): 321-324 |
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| 作者姓名： | 张晓玲 黄书伟 郭少南 |
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| 作者单位： | 电子科技大学电子工程学院,成都,610054;电子科技大学电子工程学院,成都,610054;电子科技大学电子工程学院,成都,610054 |
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| 摘 要： | 在使用FFT距离多普勒算法进行ISAR成像处理时,回波相关性的减弱将加大运动补偿难度,带来较大的误差。该文在常规相邻相关法基础上,提出了一种改进的运动补偿方法。在距离向上,利用基准回波相关法与曲线拟合,克服了低回波相关性下包络对齐时出现的包络漂移、包络跳变等缺陷;在方位向上,利用DCFT变换,对目标的运动参数进行精确估计并加以补偿,减小了回波相关性降低对相位补偿的影响。仿真验证了该方法的有效性。
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| 关 键 词： | 离散调频傅里叶变换 包络漂移 包络跳变 二次曲线拟合 |
| 收稿时间： | 2006-11-24 |
| 修稿时间： | 2006-11-24 |
An Improved Method for Parameter Estimation and Motion Compensation in ISAR Imaging |
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| ZHANG Xiao-ling,HUANG Shu-wei,GUO Shao-nan. An Improved Method for Parameter Estimation and Motion Compensation in ISAR Imaging[J]. Journal of University of Electronic Science and Technology of China, 2008, 37(3): 321-324 |
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| Authors: | ZHANG Xiao-ling HUANG Shu-wei GUO Shao-nan |
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| Affiliation: | 1.School of Electronic Engineering,University of Electronic Science and Technology of China Chengdu 610054 |
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| Abstract: | When the range-Doppler algorithm is used in inverse synthetic aperture radar (ISAR) imaging, the reduction of echo correlation will add more difficulties on motion compensation and bring more error. Accordingly, based on the adjacent-correlate compensate method used in FFT range-Doppler algorithm, an improved compensation method is presented in this paper. The traditional compensation method is modified to avoid the envelope drift and envelope jump in range align. In phase compensation, a new algorithm based on accurate target parameter estimation by use of discrete chirp-Fourier transform (DCFT) transform is presented. Finally the improve method is verified by simulation. |
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