| 星载SAR距离模糊分布规律及其改进设计 |
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| 引用本文： | 荆麟角.星载SAR距离模糊分布规律及其改进设计[J].电子与信息学报,1994,16(5):490-496. |
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| 作者姓名： | 荆麟角 |
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| 作者单位： | 中国科学院电子学研究所 北京 |
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| 基金项目： | 国家科委863计划资助项目 |
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| 摘 要： | 本文提出了一种不加大天线尺寸而又使距离模糊满足要求的新方法,它能够在保持原有天线尺寸不增大的情况下实现宽测绘带的高质量成象。这种方法采用交替发射线性调频斜率完全相反的调频信号,在对回波信号进行距离压缩时,由于主要模糊区回波信号与参考函数失配就被大大地抑制,从而使距离模糊大大改善并得到较宽的测绘带。
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| 关 键 词： | 星载合成孔径雷达 距离模糊比 入射角 脉冲重复频率 均匀和余弦加权 线性调频发射脉冲 |
| 收稿时间： | 1993-2-5 |
| 修稿时间： | 1994-4-25 |
RANGE AMBIGUITY DISTRIBUTION CHARACTER- ISTIC OF SPACEBORNE SAR AND ITS DESIGN CONSIDERATION |
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| Jing Linjiao.RANGE AMBIGUITY DISTRIBUTION CHARACTER- ISTIC OF SPACEBORNE SAR AND ITS DESIGN CONSIDERATION[J].Journal of Electronics & Information Technology,1994,16(5):490-496. |
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| Authors: | Jing Linjiao |
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| Affiliation: | Insstitute of Electronics, Acadcmia Sintca,Beijing 100080 |
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| Abstract: | A new approach is proposed which can satisfy the range ambiguity requirement while keep the antenna width not to be enlarged and get the high quality image also. Here the chirp slope of the transmitted linear frequency modulated pulses is reversed alternately. Therefore, during the range compression significant portion of the ambiguous return is suppressed due to the mismatching with the signal reference function. The suggested method provides significant improvement in RAR and can be utilized in attaining wider swath. |
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| Keywords: | SAR Range Ambiguty Ratio (RAR) Incidence angle PRF Uniform distribution Cosine weighting Chirp |
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