Congreso: XXVI Simposium Nacional de la Unión Científica Internacional de Radio (URSI 2011). Leganés, Madrid. 7-9 septiembre 2011.

Autores: Imanol de Arriba Ruiz; Félix Pérez Martínez; José María Muñoz Ferreras.

Conventional SAR (Synthetic Aperture Radar)techniques only consider a single reflection of transmittedwaveforms from targets. evertheless, today’s new applicationsforce SAR systems to work in much more complex scenes suchas urban environments. As a result, multiple-bounce returns areadditionally superposed to direct echoes. We refer to these asghost images, since they obscure true target image and lead topoor resolution. By applying Time Reversal concept to SARimaging (TR-SAR), it is possible to reduce considerably –oralmost mitigate– ghosting artifacts, recovering the lostresolution due to multipath effects. Furthermore, some focusingindicators such as entropy (E), contrast (C) and Rényi entropy(RE) provide us a good focusing criterion when using TR-SAR.