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Time-Domain Reconstruction Algorithms for FMCW-SAR

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1 Author(s)
Angel Ribalta ; Fraunhofer Institute for High Frequency Physics and Radar Techniques (Fraunhofer FHR), Wachtberg, Germany

In this letter, we develop time-domain reconstruction algorithms for frequency-modulated continuous wave synthetic aperture radar (FMCW-SAR). The algorithms considered here are the time-domain correlation algorithm, and two versions of the backprojection algorithm: the standard one based on the start-stop approximation, and a modified version that takes into account the movement of the sensor during the transmission of the pulse. Numerical simulations illustrate the performance of the algorithms, showing that the start-stop approximation may not be valid for FMCW-SAR, whereas the modified backprojection algorithm works very well here.

Published in:

IEEE Geoscience and Remote Sensing Letters  (Volume:8 ,  Issue: 3 )