| 星载寄生式InSAR系统频率同步误差分析 |
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| 引用本文： | 张永胜,王敏,梁甸农,董臻,黄海风. 星载寄生式InSAR系统频率同步误差分析[J]. 信号处理, 2007, 23(6): 927-931 |
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| 作者姓名： | 张永胜 王敏 梁甸农 董臻 黄海风 |
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| 作者单位： | 国防科技大学电子科学与工程学院,长沙,410073 |
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| 摘 要： | 频率同步是星载寄生式InSAR系统的关键问题之一。根据频率源的工作特性,建立了一种新的频率源误差模型,并在该模型的基础上详细分析了频率同步误差对双站SAR成像及分布式InSAR高程测量的影响。建立了频率同步误差到干涉相位误差的传递模型,指出了星载分布式InSAR系统对频率源准确度及稳定性的要求,仿真验证了理论分析的正确性,分析结果对星载分布式InSAR系统的设计具有重要意义。
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| 关 键 词： | 星载寄生式InSAR 双站SAR 频率同步 误差分析 |
| 修稿时间： | 2006-04-02 |
Analysis of Frequency Synchronization Error in Spaceborne Parasitic Interferometric SAR System |
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| ZHANG Yong-sheng,WANG Min,LIANG Dian-nong,DONG Zhen,HUANG Hai-feng. Analysis of Frequency Synchronization Error in Spaceborne Parasitic Interferometric SAR System[J]. Signal Processing(China), 2007, 23(6): 927-931 |
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| Authors: | ZHANG Yong-sheng WANG Min LIANG Dian-nong DONG Zhen HUANG Hai-feng |
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| Abstract: | Frequency synchronization is a key problem of spacebome parasitic Interferometric SAR(InSAR)system because the transmitters and receivers are mounted on separate platforms.A novel frequency model including the frequency errors of the Ultra Stable Oscillator(USO)is presented.The performance of the range and azimuth compression with the frequency synchronization error is ana- lyzed in detail.The error transfer model from the frequency synchronization error to the Interferometric phase error is established.The ac- curacy and stability requirement of the USO in parasitic InSAR application is pointed out.The analysis,which is proved by simuhtions, offers the principle basis of correct frequency synchronization requirements for parasitic InSAR system design. |
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| Keywords: | Spaceborne parasitic InSAR Bistatic SAR Frequency synchronization Error analysis |
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