Memorias de investigación
Time-Reversal-Based Multipath Mitigation Technique for Entropy Minimization of SAR Images

Research Areas
  • Engineering,
  • Electronic technology and of the communications,
  • Electric engineers, electronic and automatic (eil)

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 onboard real antenna. Conventional SAR techniques just consider a single reflection of transmitted waveforms from targets. Nevertheless, today?s new applications force SAR systems to work in much more complex scenes such as urban environments. Consequently, multiplebounce returns are additionally superposed to direct-scatter echoes. We refer to these as ghost images, since they obscure true target image and lead to poor resolution. By applying Time Reversal concept to SAR imaging (TRSAR), it is possible to reduce considerably ?or even mitigate? ghosting artifacts, 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.
Entity Nationality
Sin nacionalidad
Granada, España

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