© The Institution of Engineering and Technology
A new multi-baseline phase unwrapping algorithm based on the unscented Kalman filter (UKF) for SAR interferometry is proposed. This method is the result of combining a UKF with a path-following strategy and an omni-directional local phase slope estimator. This technology simultaneously performs noise filtering and phase unwrapping by an optimal data fusion approach. In addition, phase slope will be directly estimated from the sample frequency spectrum of the complex interferogram, by which the underestimation of phase slope is overcome. Results obtained with synthetic and real data validate the effectiveness of the proposed method.
References
-
-
1)
-
U. Spagnolini
.
2D phase unwrapping and instantaneous frequency estimation.
IEEE Trans. Geosci. Remote Sens.
,
3 ,
579 -
589
-
2)
-
Hui, L., Yinqing, Z., Huaping, X., Chunsheng, L.: `A simple implementation of multi-baseline INSAR', 2007 First Asian and Pacific Conf. on Synthetic Aperture Radar Proc., November 2007, Huangshan, China, p. 747–750.
-
3)
-
S.J. Julier ,
J.K. Uhlmann
.
Unscented filtering and nonlinear estimation.
Proc. IEEE
,
3 ,
401 -
422
-
4)
-
G. Fornaro ,
G. Franceschetti ,
R. Lanari ,
D. Rossi ,
M. Tesauro
.
Interferometric SAR phase unwrapping using the finite element method.
IEE Proc. Radar Sonar Navig.
,
5 ,
266 -
274
-
5)
-
Julier, S.J.: `The scaled unscented transformation', Proc. American Control Conf., May 2002, Anchorage, USA, p. 4555–4559.
-
6)
-
E. Trouv́e ,
J.-M. Nicolas
.
Improving phase unwrapping techniques by the use of local frequency estimates.
IEEE Trans. Geosci. Remote Sens.
,
6 ,
1963 -
1965
-
7)
-
B. Osmanŏglu ,
S. Wdowinski
.
InSAR phase unwrapping based on Extended Kalman Filtering.
IEEE Trans. Geosci. Remote Sens.
,
4 ,
1197 -
1202
-
8)
-
Kim, M.G., Griffiths, H.D.: `Phase unwrapping of multibaseline interferometry using Kalman filtering', Image Processing and its Applications, Conf. IEE., 1999, p. 813–817.
-
9)
-
Wahl, D.E.: `Improved SAR interferometric processing using local phase-slope correction', Proc. SPIE – The Int. Society for Optical Engineering, April 2007, Orlando, USA, p. 103–107.
-
10)
-
Lombardini, F., Lombardo, P.: `Maximum likelihood array SAR interferometry', IEEE Digital Signal Processing Workshop, September 1996, Loen, Norway, p. 358–361.
-
11)
-
Ghiglia, D.C., Wahl, D.E.: `Interferometric synthetic aperture radar terrain elevation mapping from multiple observations', Proc. Sixth IEEE Digital Signal Processing Workshop, October 1994, Albuquerque, USA, p. 33–36.
-
12)
-
Lombardo, P., Lombardini, F.: `Multi-baseline SAR interferometry for terrain slope adaptivity', IEEE National Radar Conf. Proc., May 1997, New York, USA, p. 196–201.
-
13)
-
O. Loffeld ,
H. Nies ,
S. Knedlik ,
Y. Wang
.
Phase unwrapping for SAR interferometry: a data fusion approach by Kalman Filtering.
IEEE Trans. Geosci. Remote Sens.
,
1 ,
47 -
58
-
14)
-
M. Costantini
.
A novel phase unwrapping method based on network programming.
IEEE Trans. Geosci. Remote Sens.
,
3 ,
813 -
821
-
15)
-
Nies, H., Loffeld, O., Wang, R.: `Phase unwrapping using 2D-Kalman filter potential and limitations', Proc. 2008 IEEE Int. Geoscience and Remote Sensing Symp., July 2008, Boston, USA, p. 1213–1216.
http://iet.metastore.ingenta.com/content/journals/10.1049/iet-rsn.2010.0073
Related content
content/journals/10.1049/iet-rsn.2010.0073
pub_keyword,iet_inspecKeyword,pub_concept
6
6