| 基于RWC的机载SAR斜视成像仿真 |
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| 引用本文： | 熊杰,杨凯,甘元.基于RWC的机载SAR斜视成像仿真[J].火力与指挥控制,2012,37(4):176-180. |
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| 作者姓名： | 熊杰 杨凯 甘元 |
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| 作者单位： | 1. 空军工程大学工程学院,西安,710038
2. 解放军95321部队,武汉,430100 |
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| 摘 要： | 通过建立机载合成孔径雷达的工作模型,介绍了SAR的基本成像原理,并针对机载SAR在斜视条件下,因距离走动量较大,对地面目标的成像受到严重影响的情况,详细分析了距离走动产生的原因。在傅里叶变换之前使用对距离走动进行校正的CS算法对经典的CS算法作出了改进,重点推导了改进后算法的实现过程,并通过Matlab仿真模拟地面目标物实现了CS算法在不同条件下的成像结果,证明使用改进后的算法在斜视角情况下成像质量有较大的改善。
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| 关 键 词： | 调频变标算法 合成孔径雷达 斜视角成像 距离走动校正 |
Simulation Study of Imaging for Squint-looking Airborne SAR Based on RWC |
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| XIONG Jie
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YANG Kai
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GAN Yuan.Simulation Study of Imaging for Squint-looking Airborne SAR Based on RWC[J].Fire Control & Command Control,2012,37(4):176-180. |
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| Authors: | XIONG Jie YANG Kai GAN Yuan |
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| Institution: | 1.The Engineering Institute,Air Force Engineering University,Xi’an 710038,China, 2.Unit 95321 of PLA,Wuhan 430100,China) |
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| Abstract: | Based on the model of airborne SAR.the basic theory of SAR imaging is firstly described, and the reason of range migration which affects the quality of ground target’s imaging seriously is analyzed particularly.Before FFT using the method of the Range Walk Conection Chirp Scaling Algorithm improveing the classical Chirp Scaling Algorithm,the paper chiefly describes the process of how to realize the improved algorithm.The result of imaging which is get by MATLAB simulating a ground target proves that the quality of image has been ameliorated mostly using the improved Algorithm than the previous method in the situation of squinted mode. |
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| Keywords: | chirp scaling algorithms synthetic aperture radar squint imaging range walk correction |
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