This work deals with the problem of interferometric radar phase estimation in the presence of layover. The focus here is on multichannel interferometric synthetic aperture radar (InSAR) systems with a low number of phase centers and nonuniform array geometry. An interpolated array (IA) approach is proposed in order to apply parametric spectral estimation techniques designed for uniform linear arrays (ULAs). In particular, the interpolated MUSIC and weighted subspace fitting (WSF) algorithms are considered and compared with conventional methods. Performance analysis under different InSAR scenarios is carried out based on Monte Carlo simulations. The Cram´er-Rao lower bound (CRLB) for the nonuniform interferometric array is derived and reported as a benchmark on the estimation accuracy.
|Autori interni:||LOMBARDINI, FABRIZIO|
|Autori:||F. BORDONI; A. JAKOBSSON; LOMBARDINI F; F. GINI|
|Titolo:||Multibaseline Cross-track SAR Interferometry using Interpolated Arrays|
|Anno del prodotto:||2005|
|Appare nelle tipologie:||1.1 Articolo in rivista|