Memorias de investigación
Communications at congresses:
Estimación de la Reflectividad del Multitrayecto en Entornos Urbanos en Radares de Apertura Sintética
Year:2010

Research Areas
  • Electronic technology and of the communications

Information
Abstract
Synthetic Aperture Radar (SAR) images a target region reflectivity function in the multi-dimensional spatial domain of range and cross-range. SAR synthesizes a large aperture radar in order to achieve finer azimuth resolution than the one provided by any on-board real antenna. Conventional SAR techniques assume a single reflection of transmitted waveforms from targets. Nevertheless, today¿s new scenes force SAR systems to work in urban environments. Consequently, multiple-bounce returns are added to direct-scatter echoes. We refer to these as ghost images, since they obscure true target image and lead to poor resolution. By analyzing the quadratic phase error (QPE), this paper demonstrates that Earth¿s curvature influences the defocusing degree of multipath returns. In addition to the QPE, other parameters such as integrated sidelobe ratio (ISLR), peak sidelobe ratio (PSLR), contrast and entropy provide us with the tools to identify direct-scatter echoes in images containing undesired returns coming from multipath.
International
No
Congress
XXV Simposium Nacional de la Unión Científica Internacional de Radio
960
Place
Bilbao, España
Reviewers
Si
ISBN/ISSN
Start Date
15/09/2010
End Date
17/09/2010
From page
44
To page
47
Proceedings del Congreso
Participants
  • Autor: Imanol De Arriba Ruiz UPM
  • Autor: José María Muñoz Ferreras Universidad de Alcalá de Henares
  • Autor: Felix Perez Martinez UPM

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