Multipath Reflectivity Estimation in Urban Environments for Synthetic Aperture Radar Images

Arriba Ruiz, Imanol de and Perez Martinez, Felix and Muñoz Ferreras, José María (2010). Multipath Reflectivity Estimation in Urban Environments for Synthetic Aperture Radar Images. In: "Proceedings of the 2010 Military Communications Conference", 31/10/2010 - 03/11/2010, San José, California, USA. pp. 273-278.

Description

Title: Multipath Reflectivity Estimation in Urban Environments for Synthetic Aperture Radar Images
Author/s:
  • Arriba Ruiz, Imanol de
  • Perez Martinez, Felix
  • Muñoz Ferreras, José María
Item Type: Presentation at Congress or Conference (Article)
Event Title: Proceedings of the 2010 Military Communications Conference
Event Dates: 31/10/2010 - 03/11/2010
Event Location: San José, California, USA
Title of Book: 2010 Military Communications Conference
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 a 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 directscatter 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 (C) and entropy (E) provide us with the tools to identify direct-scatter echoes in images containing undesired returns coming from multipath.

More information

Item ID: 13880
DC Identifier: http://oa.upm.es/13880/
OAI Identifier: oai:oa.upm.es:13880
Deposited by: Memoria Investigacion
Deposited on: 22 Feb 2013 12:20
Last Modified: 21 Apr 2016 13:18
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