| 引用本文: | 张寅生,杨俊刚,安玮,等.单频信号二维合成孔径成像算法.[J].国防科技大学学报,2014,36(4):97-101.[点击复制] |
| ZHANG Yinsheng,YANG Jungang,AN Wei,et al.Single frequency two-dimensional synthetic aperture imaging system and imaging algorithm[J].Journal of National University of Defense Technology,2014,36(4):97-101[点击复制] |
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| 单频信号二维合成孔径成像算法 |
| 张寅生1, 杨俊刚2, 安玮2, 刘昆1 |
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(1.国防科技大学 航天科学与工程学院， 湖南 长沙 410073;2.国防科技大学 电子科学与工程学院， 湖南 长沙 410073)
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| 摘要: |
| 传统合成孔径雷达采用大带宽信号实现距离向分辨，采用一维合成孔径实现方位分辨，得到二维图像。在某些近场成像场合，成像分辨率要求很高，依靠信号带宽很难达到要求。提出了一种二维合成孔径成像系统，利用二维合成孔径实现二维分辨，分辨率取决于合成孔径长度，不受信号带宽的约束，可以实现超高分辨率。信号采用简单的单频信号，可使系统大大简化。详细推导了单频信号的二维合成孔径成像算法。仿真结果表明，单频信号二维合成孔径是一种有效的高分辨率成像技术。 |
| 关键词: 雷达成像 近场成像 二维合成孔径 成像算法 |
| DOI：10.11887/j.cn.201404017 |
| 投稿日期：2013-11-14 |
| 基金项目:国家自然科学基金资助项目（60903206）；国家部委资助项目 |
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| Single frequency two-dimensional synthetic aperture imaging system and imaging algorithm |
| ZHANG Yinsheng1, YANG Jungang2, AN Wei2, LIU Kun1 |
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(1. College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China;2. College of Electronic Science and Engineering, National University of Defense Technology,Changsha 410073, China)
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| Abstract: |
| Traditional synthetic aperture radar uses wideband signal to achieve range resolution, and uses one-dimensional synthetic aperture to achieve azimuth resolution, thereby forming a two-dimensional image. In the cases of short range imaging, a very high imaging resolution may be required, and it is difficult to achieve such high resolution using signal bandwidth. A two-dimensional synthetic aperture imaging system is proposed; it uses the two-dimensional synthetic aperture to achieve two-dimensional resolution. The resolution depends on the length of the synthetic aperture, and it is no longer limited by the signal bandwidth and can obtain ultra-high resolution. The transmitted signal is single frequency waveform, thus the system can be very simple. The imaging algorithm for the single frequency two-dimensional synthetic aperture imaging system was derived in detail. Simulation results showed that the single frequency two-dimensional synthetic aperture imaging system is an effective technique for high resolution imaging. |
| Keywords: radar imaging short range imaging two-dimensional synthetic aperture imaging algorithm |
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