NDLI: Single-look light-burden superresolution differential SAR tomography

Content Provider	IET Digital Library
Author	Lombardini, F. Viviani, F.
Abstract	Research and application is spreading of techniques of coherent combination of complex-valued synthetic aperture radar (SAR) data to extract rich information even on complex observed scenes, fully exploiting existing SAR data archives, and new satellites. Among such techniques, SAR tomography stems from multibaseline interferometry to achieve full-3D imaging through elevation beamforming (spatial spectral estimation). The Tomo concept has been integrated with the mature differential interferometry, producing the new differential tomography (Diff-Tomo) processing mode, that allows ‘opening’ the SAR cells in complex non-stationary scenes, resolving multiple heights and slow deformation velocities of layover scatterers. Consequently, the operational capability limit of differential interferometry to the single scatterer case is overcome. Diff-Tomo processing is cast in a 2D baseline-time spectral analysis framework, with sparse sampling. The use of adaptive 2D spectral estimation has demonstrated to allow joint baseline-time processing with reduced sidelobes and enhanced height–velocity resolution at low computational burden. However, this method requires coherent multilooking processing, thus does not produce full range-azimuth resolution products, as it would be desirable for urban applications. A new single-look adaptive Diff-Tomo processor is presented and tested with satellite data, allowing full range-azimuth resolution together with height–velocity sidelobe reduction and superresolution capabilities and the low computational burden.
Starting Page	557
Ending Page	558
Page Count	2
ISSN	00135194
Volume Number	52
e-ISSN	1350911X
Issue Number	Issue 7, Apr (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/el/52/7
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/el.2015.3414
Journal	Electronics Letters
Publisher Date	2016-02-25
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	2D Baseline-time Spectral Analysis Framework Adaptive 2D Spectral Estimation Array Signal Processing Coherent Multilooking Processing Complex Nonstationary Scenes Complex-valued Synthetic Aperture Radar Data Elevation Beamforming Full Range-azimuth Resolution Product Full-3D Imaging Height-velocity Sidelobe Reduction Image Sampling Layover Scatterers Mature Differential Interferometry Multibaseline Interferometry Optical, Image And Video Signal Processing Radar Equipment Radar Imaging Radar Interferometry Radar Resolution Satellites Single-look Adaptive Diff-Tomo Processor Single-look Light-burden Superresolution Differential SAR Tomography Sparse Sampling Spatial Spectral Estimation Spectral Analysis Synthetic Aperture Radar System And Application
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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