New Technique for Static Target Detection in Dense-Multipath Urban Environments

Arriba Ruiz, Imanol de and Perez Martinez, Felix and Muñoz Ferreras, José María (2011). New Technique for Static Target Detection in Dense-Multipath Urban Environments. In: "45th IEEE International Carnahan Conference on Security Technology (ICCST 2011)", 18/10/2011 - 21/10/2011, Mataró, Barcelona, España. pp. 1-7.

Description

Title: New Technique for Static Target Detection in Dense-Multipath Urban Environments
Author/s:
  • Arriba Ruiz, Imanol de
  • Perez Martinez, Felix
  • Muñoz Ferreras, José María
Item Type: Presentation at Congress or Conference (Article)
Event Title: 45th IEEE International Carnahan Conference on Security Technology (ICCST 2011)
Event Dates: 18/10/2011 - 21/10/2011
Event Location: Mataró, Barcelona, España
Title of Book: 45th IEEE International Carnahan Conference on Security Technology (ICCST 2011)
Date: 2011
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 with 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, new uses of Unmanned Aerial Vehicles (UAVs) for civilian-security applications force SAR systems to work in much more complex scenes such as urban environments. Consequently, multiple-bounce returns are additionally superposed to direct-scatter echoes. They are known as ghost images, since they obscure true target image and lead to poor resolution. All this may involve a significant problem in applications related to surveillance and security. In this work, an innovative multipath mitigation technique is presented in which Time Reversal (TR) concept is applied to SAR images when the target is concealed in clutter, leading to TR-SAR technique. This way, the effect of multipath is considerably reduced ?or even removed?, recovering the lost resolution due to multipath propagation. Furthermore, some focusing indicators such as entropy (E), contrast (C) and Rényi entropy (RE) provide us with a good focusing criterion when using TR-SAR.

More information

Item ID: 13882
DC Identifier: http://oa.upm.es/13882/
OAI Identifier: oai:oa.upm.es:13882
Deposited by: Memoria Investigacion
Deposited on: 22 Feb 2013 12:34
Last Modified: 21 Apr 2016 13:19
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