A closed-form robust Chinese remainder theorem Based multibaseline phase unwrapping

Multibaseline phase unwrapping (PU) is a critical processing procedure of multibaseline synthetic aperture radar interferometry (InSAR). The presence of phase noise makes Chinese remainder theorem (CRT) method not robust enough and inapplicable in practical cases. In this letter, a method based on a closed-form robust Chinese remainder theorem (CFRCRT) is presented to improve the noise robustness of the multibaseline PU. Experimental results prove the effectiveness of CFRCRT method and demonstrate that the CFRCRT method is more robust to noise than the CRT method.

[1]  Xiang-Gen Xia,et al.  Phase detection based range estimation with a dual-band robust Chinese remainder theorem , 2013, Science China Information Sciences.

[2]  Fuk K. Li,et al.  Synthetic aperture radar interferometry , 2000, Proceedings of the IEEE.

[3]  Xiang-Gen Xia,et al.  Location and Imaging of Elevated Moving Target using Multi-Frequency Velocity SAR with Cross-Track Interferometry , 2011, IEEE Transactions on Aerospace and Electronic Systems.

[4]  Daniel E. Wahl,et al.  Interferometric synthetic aperture radar terrain elevation mapping from multiple observations , 1994, Proceedings of IEEE 6th Digital Signal Processing Workshop.

[5]  Vito Pascazio,et al.  Maximum a posteriori estimation of height profiles in InSAR imaging , 2004, IEEE Geoscience and Remote Sensing Letters.

[6]  Xiang-Gen Xia,et al.  A Closed-Form Robust Chinese Remainder Theorem and Its Performance Analysis , 2010, IEEE Transactions on Signal Processing.

[7]  Vito Pascazio,et al.  Multifrequency InSAR height reconstruction through maximum likelihood estimation of local planes parameters , 2002, IEEE Trans. Image Process..

[8]  A. Monti Guarnieri,et al.  Maximum likelihood multi-baseline Sar interferometry , 2006 .

[9]  Giampaolo Ferraioli,et al.  Multichannel Phase Unwrapping With Graph Cuts , 2009, IEEE Geoscience and Remote Sensing Letters.

[10]  David A. Seal,et al.  The Shuttle Radar Topography Mission , 2007 .

[11]  Gang Li,et al.  Range and Velocity Estimation of Moving Targets Using Multiple Stepped-frequency Pulse Trains , 2008, Sensors.

[12]  Wei Xu,et al.  Phase-unwrapping of SAR interferogram with multi-frequency or multi-baseline , 1994, Proceedings of IGARSS '94 - 1994 IEEE International Geoscience and Remote Sensing Symposium.

[13]  Pierfrancesco Lombardo,et al.  Multi-baseline SAR interferometry for terrain slope adaptivity , 1997, Proceedings of the 1997 IEEE National Radar Conference.