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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。 更多还原

【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... 更多还原