Memorias de investigación
Ponencias en congresos:
New Technique for Static Target Detection in Dense-Multipath Urban Environments
Año:2011
Áreas de investigación
  • Tecnología electrónica y de las comunicaciones
Datos
Descripción
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.
Internacional
Si
Nombre congreso
45th IEEE International Carnahan Conference on Security Technology (ICCST 2011)
Tipo de participación
960
Lugar del congreso
Mataró, Barcelona, España
Revisores
Si
ISBN o ISSN
978-1-4577-0901-2
DOI
Fecha inicio congreso
18/10/2011
Fecha fin congreso
21/10/2011
Desde la página
1
Hasta la página
7
Título de las actas
Proceedings of the ICCST 2011
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Imanol De Arriba Ruiz UPM
  • Autor: Felix Perez Martinez UPM
  • Autor: José María Muñoz Ferreras Universidad de Alcalá de Henares
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Departamento: Señales, Sistemas y Radiocomunicaciones