A joint multichannel balance and interferometric phase unwrapping algorithm

In this paper, a joint method to estimate unwrapped interferometric phase and alleviate the channel mismatch based on the multibaseline SAR interferometry system is presented. The calibration method proposed herein estimates the second order moments of phase vector from a set of received echo data. These theoretical analysis, supplemented with experimental results show that the method can effectively relieve the channel imbalance and accurately provide the unwrapped interferometric phases in the presence of the large image coregistration errors.