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Volume 29 Issue 4
Jan.  2011
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Wu Nan, Feng Da-zheng, Liu Bao-quan. A Phase Unwrapping Approach Based on the Branch-Cut Method and Finite Element Method for Interferometric SAR[J]. Journal of Electronics & Information Technology, 2007, 29(4): 846-850. doi: 10.3724/SP.J.1146.2005.01119
Citation: Wu Nan, Feng Da-zheng, Liu Bao-quan. A Phase Unwrapping Approach Based on the Branch-Cut Method and Finite Element Method for Interferometric SAR[J]. Journal of Electronics & Information Technology, 2007, 29(4): 846-850. doi: 10.3724/SP.J.1146.2005.01119

A Phase Unwrapping Approach Based on the Branch-Cut Method and Finite Element Method for Interferometric SAR

doi: 10.3724/SP.J.1146.2005.01119
  • Received Date: 2005-09-05
  • Rev Recd Date: 2006-05-08
  • Publish Date: 2007-04-19
  • A two-dimensional phase unwrapping approach is proposed using the branch-cut method and finite element method. Different strategies are taken for different quality data regions: first, using the congruence characteristic of the branch-cut method, the unwrapped phases can be retrieved in the reliable region with the largest area; then with good boundary values provided, the remaining regions are unwrapped with the finite element method (FEM) in a least square sense. Experimental results, carried out on simulated and real data, show that the proposed approach overcomes the drawbacks of the branch-cut method and FEM, i.e., the half-baked solution and phase slope underestimation, respectively, and has an advantage over other approaches in accuracy.
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