| 基于广义模糊函数的MIMO SAR分辨特性分析 |
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| 引用本文： | 周伟,陈浩文,刘永祥,凌永顺.基于广义模糊函数的MIMO SAR分辨特性分析[J].国防科技大学学报,2013,35(6):77-81. |
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| 作者姓名： | 周伟 陈浩文 刘永祥 凌永顺 |
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| 作者单位： | 国防科技大学四院空间电子信息技术研究所,国防科技大学四院空间电子信息技术研究所 |
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| 基金项目： | 国家杰出青年科学基金;国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 摘 要： | 多发多收合成孔径雷达（MIMO SAR）是近年来发展起来的一种新型雷达体制。与传统SAR相比，MIMO SAR综合利用了波形分集和空间分集优势，如何衡量系统的分辨特性以及模糊特性成为亟待解决的问题。本文将模糊函数概念推广到MIMO SAR性能分析中，通过数学推导获得了广义模糊函数的解析表示，结果表明MIMO SAR系统分辨率不仅取决于发射波形参数以及合成孔径长度，还与发射波形集的正交性以及收发天线阵列流形密切相关，仿真实验验证了系统模型的有效性和相应分析的正确性。
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| 关 键 词： | 广义模糊函数 MIMO雷达 合成孔径雷达 空间分辨率 |
| 收稿时间： | 4/7/2013 12:00:00 AM |
Resolution Analysis of MIMO SAR Based on Generalized Ambiguity Function |
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| ZHOU Wei,CHEN Haowen,LIU Yongxiang and LING Yongshun.Resolution Analysis of MIMO SAR Based on Generalized Ambiguity Function[J].Journal of National University of Defense Technology,2013,35(6):77-81. |
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| Authors: | ZHOU Wei CHEN Haowen LIU Yongxiang and LING Yongshun |
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| Institution: | 1.College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073,China;1.College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073,China;1.College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073,China;2.Electronic Engineering Institute, Hefei 230037, China |
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| Abstract: | Recent years, a new SAR concept based on Multi-Input Multi-Output (MIMO) configuration has drawn much attention. However, it is an urgent and difficult problem to characterize the resolution and ambiguity due to waveform diversity and spatial diversity. In this paper, we extend the generalized ambiguity function of the conventional SAR into MIMO SAR case. Detailed analysis shows that the resolution of MIMO SAR not only depends on the parameters of the waveform and synthetic aperture length, but also the array geometry of the multiple transmitters and multiple receivers. Simulations with a variety of parameter combinations demonstrate the derivation and analysis. |
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| Keywords: | generalized ambiguity function multi-input multi-output radar multi-core synthetic aperture radar spatial resolution |
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