Abstract
The coherence between two SAR images is an important factor in the interferometric SAR processing. As a previous step to the phase unwrapping, multilook averaging is widely used as the coherence estimator, and in general, a k × k square window is used. In this letter, it is shown that the performance of the coherence estimator can be improved by using an adaptive weighted window, which is originally developed for SAR speckle reduction. The proposed method was tested using the InSAR data obtained by an automobile-based SAR system.
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