Abstract
Interferometric ISAR can obtain 3D image of the target. The location of the target can be obtained from the interferometric phase. Phase unwrapping is a key procedure in InISAR signal processing, as the interferometric phase may be ambiguous. In this paper, we propose a method used for InISAR interferometric phase unwrapping. This method uses dual frequency conjugated processing (DFCP) to perform phase unwrapping. This method is equivalent to increasing the carrier wave length and can expand the measurement range of the cross direction. After DFPC we can obtain an unwrapped interferometric phase. It can be used as the reference phase in the following phase unwrapping procedure. Simulation data is used to demonstrate the effectiveness of the method.
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