Open Access

Joint Multi-baseline SAR Interferometry

  • G. Fornaro1Email author,
  • A. Monti Guarnieri2,
  • A. Pauciullo1 and
  • S. Tebaldini2
EURASIP Journal on Advances in Signal Processing20052005:186503

Received: 5 August 2004

Published: 14 December 2005


We propose a technique to provide interferometry by combining multiple images of the same area. This technique differs from the multi-baseline approach in literature as (a) it exploits all the images simultaneously, (b) it performs a spectral shift preprocessing to remove most of the decorrelation, and (c) it exploits distributed targets. The technique is mainly intended for DEM generation at centimetric accuracy, as well as for differential interferometry. The problem is framed in the contest of single-input multiple-output (SIMO) channel estimation via the cross-relations (CR) technique and the resulting algorithm provides significant improvements with respect to conventional approaches based either on independent analysis of single interferograms or multi-baselines phase analysis of single pixels of current literature, for those targets that are correlated in all the images, like for long-term coherent areas, or for acquisitions taken with a short revisit time (as those gathered with future satellite constellations).

Keywords and phrases:

synthetic aperture radar interferometry radar data processing terrain mapping

Authors’ Affiliations

Istituto per il Rilevamento Elettromagnetico dell'Ambiente (IREA), Consiglio Nazionale delle Ricerche (CNR)
Dipartimento di Elettronica e Informazione, Politecnico di Milano


© G. Fornaro et al. 2005

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.