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Abstract
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| 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 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 (TR-SAR), 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. | |
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International
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Si |
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Congress
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SENSOR SIGNAL PROCESSING FOR DEFENCE 2011 (SSPD 2011) |
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960 |
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Place
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London, UK |
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Reviewers
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Si |
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ISBN/ISSN
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978-1-62276-177-7 |
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10.1049/ic.2011.0139 |
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Start Date
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27/09/2011 |
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End Date
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29/09/2011 |
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From page
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6 |
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To page
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10 |
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Proceedings of SENSOR SIGNAL PROCESSING FOR DEFENCE 2011 (SSPD 2011) |