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Modeling and reduction of SAR interferometric phase noise in the wavelet domain
López Martínez, Carlos; Fabregas Canovas, Francisco Javier
Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció
This paper addresses the problem of interferometric phase noise reduction in synthetic aperture radar interferometry. A new phase noise model in the complex domain is introduced and validated by using both simulated and real interferograms. This noise model is also derived in the complex wavelet domain, where a novel noise reduction algorithm, which is not based on a windowing process and without the necessity of phase unwrapping, is addressed. The use of the wavelet transform allows to maintain the spatial resolution in the filtered phase image and prevents to filter low coherence areas. By using both, simulated as well as real interferometric phase images, the performance of this algorithm, in terms of noise reduction, spatial resolution maintenance, and computational efficiency, is reported and compared with other conventional filtering approaches.
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació
Interferometry
Wavelets (Mathematics)--Data processing
Signal theory (Telecommunication)
Senyal, Teoria del (Telecomunicació)
info:eu-repo/semantics/publishedVersion
Article
IEEE Press. Institute of Electrical and Electronics Engineers
         

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