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| 分布式小卫星多中心频率SAR实现宽域二维高分辨率成像 | |
| 引用本文： | 夏玉立,雷宏,黄瑶.分布式小卫星多中心频率SAR实现宽域二维高分辨率成像[J].电子与信息学报,2009,31(2):501-504. |
| 作者姓名： | 夏玉立 雷宏 黄瑶 |
| 作者单位： | 1. 中国科学院电子学研究所,北京,100190;中国科学院研究生院,北京,100039 2. 中国科学院电子学研究所,北京,100190 |
| 摘 要： | 分布式小卫星SAR能够打破传统单星SAR测绘带宽和方位分辨率的矛盾.该文分析了一种沿航向排列分布式小卫星宽测绘带二维高分辨率成像技术,每颗卫星同时发射接收不同频率的线性调频信号,先分别在每个子带解方位多普勒模糊,并将方位多普勒中心频率调整至零频,然后在距离向进行子带拼接得到大带宽的线性调频信号从而得到高的距离向分辨率.此外,这种多发多收的工作方式还增加了系统平均发射功率,提高了信噪比. |
| 关 键 词： | 分布式小卫星SAR 空域滤波 距离向子带拼接 宽测绘带 二维高分辨率 |
| 收稿时间： | 2007-8-15 |
| 修稿时间： | 2008-2-1 |
Using Multi-central Frequency Distributed Small Satellite SAR to Achieve Wide Swath and Two Dimensional High Resolution |
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| Xia Yu-li,Lei Hong,Huang Yao.Using Multi-central Frequency Distributed Small Satellite SAR to Achieve Wide Swath and Two Dimensional High Resolution[J].Journal of Electronics & Information Technology,2009,31(2):501-504. | |
| Authors: | Xia Yu-li Lei Hong Huang Yao |
| Affiliation: | Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China; Graduate University of Chinese Academy of Sciences, Beijing 100039, China |
| Abstract: | Distributed small satellite SAR can overcome the traditional contradiction of swath and azimuth resolution.In this paper,an algorithm to achieve both two dimensional high resolution and wide swath is proposed. Every small satellite work in the active state,they transmit and receive different frequency band signal simultaneity. First,the azimuth ambiguity is eliminated in each frequency sub-band,then the signal is rectified to zero Doppler frequency,after that this algorithm does the range spectral synthesis... |
| Keywords: | Distributed small satellites SAR Space filtering Range sub-band synthesis Wide swath Two dimensional high resolution |
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