| 基于局部频率和多网格技术的InSAR相位解缠算法 |
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| 引用本文： | 刘子龙,蔡斌,董臻.基于局部频率和多网格技术的InSAR相位解缠算法[J].测绘学报,2010,39(1):82-87. |
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| 作者姓名： | 刘子龙 蔡斌 董臻 |
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| 作者单位： | 国防科学技术大学电子科学与工程学院,湖南,长沙,410073;国防科学技术大学电子科学与工程学院,湖南,长沙,410073;国防科学技术大学电子科学与工程学院,湖南,长沙,410073 |
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| 摘 要： | 提出一种基于自适应局部频率估计和多网格加权迭代的相位解缠算法。采用高精度的局部频率估计代替滤波相位差分,先用最小二乘FFT法进行初始相位解缠,再以局部频率估计置信度做为依据判断不可解缠区域进而设置加权参量,应用多网格法完成精细相位解缠。局部频率估计的应用使得解缠前无需进行单独的相位滤波,简化了InSAR处理模块,提高了数据处理效率。经实验验证,InSAR数据处理精度明显提高。
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| 关 键 词： | 局部频率估计 相位解缠 多网格技术 InSAR |
A New InSAR Phase Unwrapping Method Based on Local Frequency Estimation and Multigrid Technique |
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| LIU Zilong,CAI Bin,DONG Zhen.A New InSAR Phase Unwrapping Method Based on Local Frequency Estimation and Multigrid Technique[J].Acta Geodaetica et Cartographica Sinica,2010,39(1):82-87. |
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| Authors: | LIU Zilong CAI Bin DONG Zhen |
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| Institution: | LIU Zilong,CAI Bin,DONG ZhenCollege of Electronic Science , Engineering,National University of Defence Technology,Changsha 410073,China |
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| Abstract: | A new phase unwrapping method based on local frequency estimation and multigrid technique is proposed. In this algorithm,the phase difference is replaced by local frequency estimation. Firstly,a coarse unwrapped phase was obtained with FFT,and then the fine unwrapped phase is achieved with multigrid technique. The weighting parameters are set according to the confidence of local frequency estimation. The method needs no extra phase filtering process,so the processing module is simplified and the processing ... |
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| Keywords: | local frequency estimation phase unwrapping multigrid technique InSAR |
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