Memorias de investigación
Communications at congresses:
Corregistro de Imágenes SAR Basado en Diferentes Estimadores de Coherencia
Year:2008

Research Areas
  • Processing and signal analysis

Information
Abstract
This article presents a method for the determination of the relative misregistration between two interferometric synthetic aperture radar (InSAR) images. Classical coregistration techniques are based on the maximization of the crosscorrelation coefficient, i.e. the maximum likelihood (ML) estimate of the coherence magnitude. This paper proposes an efficient algorithm to solve the coherence maximization with high accuracy, reducing the computational complexity of the classical techniques based on oversampled data. Furthermore, several coherence estimators have been proposed in the literature in addition to the ML estimate. This paper evaluates the behaviour of the algorithm using three different coherence magnitude estimators as the kernel of the optimization problem. The discrete Fourier transform (DFT) is exploited to formulate the algorithm and to explain the necessity to register the images with subpixel accuracy. The performance of the technique has been proved over simulated data of a high resolution millimeter-wave InSAR system that is currently under development.
International
No
Congress
XXIII Simposium Nacional de la Unión Científica Internacional de Radio. URSI 2008.
960
Place
Madrid, España
Reviewers
Si
ISBN/ISSN
978-84-612-6291-5
Start Date
22/09/2008
End Date
24/09/2008
From page
1
To page
4
Actas del XXIII Simposium Nacional de la Unión Científica Internacional de Radio. URSI 2008.
Participants
  • Autor: Mihai Datcu German Aeroespace Center
  • Autor: Mateo Burgos Garcia UPM
  • Autor: Jose Tomas Gonzalez Partida UPM

Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Microondas y Radar
  • Departamento: Señales, Sistemas y Radiocomunicaciones