Estimación de la Reflectividad del Multitrayecto en Entornos Urbanos en Radares de Apertura Sintética

Arriba Ruiz, Imanol de and Perez Martinez, Felix and Muñoz Ferreras, José María (2010). Estimación de la Reflectividad del Multitrayecto en Entornos Urbanos en Radares de Apertura Sintética. In: "XXV Simposium Nacional de la Unión Científica Internacional de Radio (URSI 2010)", 15/09/2010 - 17/09/2010, Bilbao, España. pp. 44-47.

Description

Title: Estimación de la Reflectividad del Multitrayecto en Entornos Urbanos en Radares de Apertura Sintética
Author/s:
  • Arriba Ruiz, Imanol de
  • Perez Martinez, Felix
  • Muñoz Ferreras, José María
Item Type: Presentation at Congress or Conference (Article)
Event Title: XXV Simposium Nacional de la Unión Científica Internacional de Radio (URSI 2010)
Event Dates: 15/09/2010 - 17/09/2010
Event Location: Bilbao, España
Title of Book: Proceedings del Congreso XXV Simposium Nacional de la Unión Científica Internacional de Radio (URSI 2010)
Date: 2010
Subjects:
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Señales, Sistemas y Radiocomunicaciones
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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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.

More information

Item ID: 13879
DC Identifier: http://oa.upm.es/13879/
OAI Identifier: oai:oa.upm.es:13879
Deposited by: Memoria Investigacion
Deposited on: 22 Feb 2013 12:11
Last Modified: 21 Apr 2016 13:18
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