| OFDM-ISAR的稀疏优化成像与运动补偿 |
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| 引用本文： | 吴敏,张磊,刘松杨,邢孟道.OFDM-ISAR的稀疏优化成像与运动补偿[J].雷达学报,2016,5(1):72-81. |
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| 作者姓名： | 吴敏 张磊 刘松杨 邢孟道 |
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| 作者单位： | (西安电子科技大学 西安 710071) |
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| 基金项目： | 国家自然科学基金(61301280, 61301293),高等学校博士学科点专项科研基金(20120203130001) |
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| 摘 要： | 正交频分复用(OFDM)技术可用以获得无干扰的高分辨距离雷达成像,该文研究利用OFDM波形实现非合作目标的逆合成孔径雷达(ISAR)成像和运动补偿问题。文中讨论了目标平动对循环前缀(CP)长度的影响,利用了ISAR成像的本质稀疏性同时实现成像重建和相位补偿。实验表明,基于CP的OFDM-ISAR运动补偿算法可有效克服OFDM-ISAR成像的距离干扰和运动误差影响,具有较好的稳健性和精确性。
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| 关 键 词： | 逆合成孔径雷达(ISAR)成像 正交频分复用(OFDM) 循环前缀(CP) 运动补偿 |
| 收稿时间： | 2016-01-22 |
OFDM-ISAR Sparse Optimization Imaging and Motion Compensation |
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| Wu Min,Zhang Lei,Liu Songyang,Xing Mengdao.OFDM-ISAR Sparse Optimization Imaging and Motion Compensation[J].Journal of Radars,2016,5(1):72-81. |
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| Authors: | Wu Min Zhang Lei Liu Songyang Xing Mengdao |
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| Affiliation: | (Xidian University, Xi'an 710071, China) |
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| Abstract: | Orthogonal Frequency Division Multiplexing (OFDM) technology has been utilized in radar imaging to obtain high-resolution range profiles without inter-range cell interference. In this study, we establish a novel algorithm for Inverse Synthetic Aperture Radar (ISAR) imaging of a non-cooperative target using OFDM waveforms. We also achieve motion compensation and image enhancement with sparse reconstruction optimization. Utilizing sparse reconstruction optimization, we can simultaneously achieve high-precision OFDM-ISAR imaging and also correct phase errors. Extensive experimentation confirms that the proposed method can effectively overcome range interference and phase errors in OFDM-ISAR imaging, providing optimal robustness and precision. |
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